From 900322c1002375d597746855d451231c59ce1a30 Mon Sep 17 00:00:00 2001 From: Troy Sornson Date: Fri, 24 Mar 2023 08:55:19 -0600 Subject: [PATCH] Update README, update docs, support pluto and stumpy conversions --- Makefile | 2 +- README.md | 31 + docs/404.html | 116 +++- docs/CrImage.html | 148 +++-- docs/CrImage/ChannelType.html | 128 ++-- docs/CrImage/Color.html | 138 +++-- docs/CrImage/Exception.html | 126 ++-- docs/CrImage/Format.html | 120 ++-- docs/CrImage/Format/JPEG.html | 113 ++-- docs/CrImage/Format/Open.html | 120 ++-- docs/CrImage/Format/PNG.html | 113 ++-- docs/CrImage/Format/PPM.html | 120 ++-- docs/CrImage/Format/Save.html | 120 ++-- docs/CrImage/Format/WebP.html | 113 ++-- docs/CrImage/GrayscaleImage.html | 457 ++++++++++++-- docs/CrImage/GrayscaleImage/Pixel.html | 510 ++++++++++++++++ docs/CrImage/Image.html | 140 +++-- docs/CrImage/Mask.html | 178 ++++-- docs/CrImage/Operation.html | 120 ++-- docs/CrImage/Operation/BilinearResize.html | 122 ++-- docs/CrImage/Operation/BoxBlur.html | 122 ++-- docs/CrImage/Operation/Brightness.html | 122 ++-- docs/CrImage/Operation/ChannelSwap.html | 122 ++-- docs/CrImage/Operation/Contrast.html | 122 ++-- docs/CrImage/Operation/Crop.html | 128 ++-- docs/CrImage/Operation/Draw.html | 132 ++-- docs/CrImage/Operation/GaussianBlur.html | 122 ++-- docs/CrImage/Operation/HistogramEqualize.html | 124 ++-- .../HistogramEqualize/Histogram.html | 128 ++-- docs/CrImage/Operation/HorizontalBlur.html | 122 ++-- docs/CrImage/Operation/MaskApply.html | 130 ++-- docs/CrImage/Operation/VerticalBlur.html | 122 ++-- docs/CrImage/RGBAImage.html | 445 ++++++++++++-- docs/CrImage/RGBAImage/Pixel.html | 548 +++++++++++++++++ docs/CrImage/Region.html | 132 ++-- docs/Pluto.html | 331 ++++++++++ docs/Pluto/ImageGA.html | 567 ++++++++++++++++++ docs/Pluto/ImageRGBA.html | 567 ++++++++++++++++++ docs/StumpyCore.html | 414 +++++++++++++ docs/StumpyCore/Canvas.html | 429 +++++++++++++ docs/index.html | 144 +++-- docs/index.json | 2 +- docs/search-index.js | 2 +- sample.ppm | 79 +++ scripts/benchmark.cr | 2 + scripts/sample.cr | 2 +- scripts/stumpy_pluto_test.cr | 14 + shard.yml | 7 + src/all_formats.cr | 3 + src/cr-image/format/save.cr | 4 +- src/cr-image/grayscale_image.cr | 9 + src/cr-image/rgba_image.cr | 11 + src/docs.cr | 6 + src/lib-formats/bindings/lib_jpeg_turbo.cr | 92 +-- src/lib-formats/bindings/lib_spng.cr | 136 ++--- src/lib-formats/bindings/lib_webp.cr | 14 +- src/pluto.cr | 30 + src/stumpy.cr | 46 ++ 58 files changed, 7182 insertions(+), 1385 deletions(-) create mode 100644 docs/CrImage/GrayscaleImage/Pixel.html create mode 100644 docs/CrImage/RGBAImage/Pixel.html create mode 100644 docs/Pluto.html create mode 100644 docs/Pluto/ImageGA.html create mode 100644 docs/Pluto/ImageRGBA.html create mode 100644 docs/StumpyCore.html create mode 100644 docs/StumpyCore/Canvas.html create mode 100644 sample.ppm create mode 100644 scripts/stumpy_pluto_test.cr create mode 100644 src/all_formats.cr create mode 100644 src/docs.cr create mode 100644 src/pluto.cr create mode 100644 src/stumpy.cr diff --git a/Makefile b/Makefile index ee07b4e..67f6988 100644 --- a/Makefile +++ b/Makefile @@ -6,4 +6,4 @@ benchmark: .PHONY: docs docs: - crystal doc src/cr-image.cr + crystal doc src/docs.cr --project-name="Crystal Image" --source-refname=$(shell git rev-parse HEAD) diff --git a/README.md b/README.md index 359a971..e4127b2 100644 --- a/README.md +++ b/README.md @@ -35,6 +35,9 @@ require "cr-image" require "cr-image/jpeg" require "cr-image/png" require "cr-image/webp" + +# Or, alternatively +require "cr-image/all_formats" ``` ### Example @@ -66,6 +69,34 @@ Yields this image: [See documentation](http://troy.sornson.io/cr-image/) for more examples. +### (Pluto)[https://github.com/phenopolis/pluto] and (Stumpy)[https://github.com/stumpycr/stumpy_core] Conversion + +If your library or application already uses Pluto or Stumpy and you want to use +some of the functionality of this library, CrImage also provides some optional +conversion methods: + +```crystal +require "cr-image/pluto" +pluto_image # => Pluto::ImageRGBA +pluto_image_rgba.to_crimage # => CrImage::RGBAImage + +cr_image # => CrImage::RGBAImage +cr_image.to_pluto # => Pluto::ImageRGBA +``` + +```crystal +require "cr-image/stumpy" +stumpy_canvas # => StumpyCore::Canvas +stumpy_canvas.to_crimage # => CrImage::RGBAImage + +cr_image # => CrImage::RGBAImage +cr_image.to_stumpy # => StumpyCore::Canvas +``` + +*NOTE:* Stumpy uses `UInt16` for its underlying raw image storage per channel per pixel, while Pluto and +CrImage uses `UInt8`. Converting from a Stumpy `Canvas` object to `RGBAImage` may lose quality if the original +image used 16 bit color channels (i.e. 16-bit PNG). Most image formats tend to use 8-bit color channels. + ## Development This requires `libwebp`, `libspng`, and `libturbojpeg` to run. Then: diff --git a/docs/404.html b/docs/404.html index cea4ff8..a27f97d 100644 --- a/docs/404.html +++ b/docs/404.html @@ -4,16 +4,16 @@ - - + + - - cr-image master + + Crystal Image master-dev @@ -34,12 +34,12 @@

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diff --git a/docs/CrImage/Color.html b/docs/CrImage/Color.html index 0cbdfb8..3d84dc3 100644 --- a/docs/CrImage/Color.html +++ b/docs/CrImage/Color.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Color - cr-image master + + CrImage::Color - Crystal Image master-dev @@ -34,12 +34,12 @@

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diff --git a/docs/CrImage/Exception.html b/docs/CrImage/Exception.html index c028f7f..62cef44 100644 --- a/docs/CrImage/Exception.html +++ b/docs/CrImage/Exception.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Exception - cr-image master + + CrImage::Exception - Crystal Image master-dev @@ -34,12 +34,12 @@

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diff --git a/docs/CrImage/Format.html b/docs/CrImage/Format.html index 9628e2e..7ae9ecd 100644 --- a/docs/CrImage/Format.html +++ b/docs/CrImage/Format.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Format - cr-image master + + CrImage::Format - Crystal Image master-dev @@ -34,12 +34,12 @@

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diff --git a/docs/CrImage/Format/Open.html b/docs/CrImage/Format/Open.html index 4685cdf..e68f667 100644 --- a/docs/CrImage/Format/Open.html +++ b/docs/CrImage/Format/Open.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Format::Open - cr-image master + + CrImage::Format::Open - Crystal Image master-dev @@ -34,12 +34,12 @@

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diff --git a/docs/CrImage/Format/PNG.html b/docs/CrImage/Format/PNG.html index 7cc5337..649dad8 100644 --- a/docs/CrImage/Format/PNG.html +++ b/docs/CrImage/Format/PNG.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Format::PNG - cr-image master + + CrImage::Format::PNG - Crystal Image master-dev @@ -34,12 +34,12 @@

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diff --git a/docs/CrImage/Format/PPM.html b/docs/CrImage/Format/PPM.html index b7472a3..bb4d49d 100644 --- a/docs/CrImage/Format/PPM.html +++ b/docs/CrImage/Format/PPM.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Format::PPM - cr-image master + + CrImage::Format::PPM - Crystal Image master-dev @@ -34,12 +34,12 @@

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diff --git a/docs/CrImage/Format/Save.html b/docs/CrImage/Format/Save.html index acfacd3..d80ae01 100644 --- a/docs/CrImage/Format/Save.html +++ b/docs/CrImage/Format/Save.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Format::Save - cr-image master + + CrImage::Format::Save - Crystal Image master-dev @@ -34,12 +34,12 @@

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diff --git a/docs/CrImage/Format/WebP.html b/docs/CrImage/Format/WebP.html index 28097cb..c4c4981 100644 --- a/docs/CrImage/Format/WebP.html +++ b/docs/CrImage/Format/WebP.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Format::WebP - cr-image master + + CrImage::Format::WebP - Crystal Image master-dev @@ -34,12 +34,12 @@

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diff --git a/docs/CrImage/GrayscaleImage.html b/docs/CrImage/GrayscaleImage.html index 1995e41..1050cad 100644 --- a/docs/CrImage/GrayscaleImage.html +++ b/docs/CrImage/GrayscaleImage.html @@ -4,16 +4,16 @@ - - + + - - CrImage::GrayscaleImage - cr-image master + + CrImage::GrayscaleImage - Crystal Image master-dev @@ -34,12 +34,12 @@

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Instance Method Detail

+
+
+ + def [](x : Int32, y : Int32) : Pixel + + # +
+ +
+
+ + [View source] + +
+
+
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+ + +
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+ + def to_stumpy : StumpyCore::Canvas + + # +
+ +
+
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diff --git a/docs/CrImage/GrayscaleImage/Pixel.html b/docs/CrImage/GrayscaleImage/Pixel.html new file mode 100644 index 0000000..9e0d2eb --- /dev/null +++ b/docs/CrImage/GrayscaleImage/Pixel.html @@ -0,0 +1,510 @@ + + + + + + + + + + + + + + + + CrImage::GrayscaleImage::Pixel - Crystal Image master-dev + + + + + +
+
+
+ +
+ +
+

+ + Crystal Image + +

+ + + master-dev + +
+
+ + + +
+ + +
+
+ + +
+

+ + struct CrImage::GrayscaleImage::Pixel + +

+ + + + + + + + + + + + + + + + + + + + +

+ + + + Defined in: +

+ + + + cr-image/grayscale_image.cr + + +
+ + + + + + +

+ + + + Constructors +

+ + + + + + +

+ + + + Instance Method Summary +

+ + + + + + +
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
+ + +

+ + + + Constructor Detail +

+ +
+
+ + def self.new(gray : UInt8, alpha : UInt8) + + # +
+ +
+
+ + [View source] + +
+
+ + + + + + +

+ + + + Instance Method Detail +

+ +
+
+ + def alpha : UInt8 + + # +
+ +
+
+ +
+
+ +
+
+ + def clone + + # +
+ +
+
+ + [View source] + +
+
+ +
+
+ + def copy_with(gray _gray = @gray, alpha _alpha = @alpha) + + # +
+ +
+
+ + [View source] + +
+
+ +
+
+ + def gray : UInt8 + + # +
+ +
+
+ +
+
+ + + + + +
+ + + diff --git a/docs/CrImage/Image.html b/docs/CrImage/Image.html index 1f93cab..d07980d 100644 --- a/docs/CrImage/Image.html +++ b/docs/CrImage/Image.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Image - cr-image master + + CrImage::Image - Crystal Image master-dev @@ -34,12 +34,12 @@

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diff --git a/docs/CrImage/Operation.html b/docs/CrImage/Operation.html index a6585e9..49c2c00 100644 --- a/docs/CrImage/Operation.html +++ b/docs/CrImage/Operation.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Operation - cr-image master + + CrImage::Operation - Crystal Image master-dev @@ -34,12 +34,12 @@

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diff --git a/docs/CrImage/Operation/HorizontalBlur.html b/docs/CrImage/Operation/HorizontalBlur.html index 7fb8fab..fc7c924 100644 --- a/docs/CrImage/Operation/HorizontalBlur.html +++ b/docs/CrImage/Operation/HorizontalBlur.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Operation::HorizontalBlur - cr-image master + + CrImage::Operation::HorizontalBlur - Crystal Image master-dev @@ -34,12 +34,12 @@

- cr-image + Crystal Image

- master + master-dev
@@ -51,117 +51,142 @@

@@ -365,7 +415,7 @@


- [View source] + [View source]
diff --git a/docs/CrImage/Operation/MaskApply.html b/docs/CrImage/Operation/MaskApply.html index 2174747..c991f42 100644 --- a/docs/CrImage/Operation/MaskApply.html +++ b/docs/CrImage/Operation/MaskApply.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Operation::MaskApply - cr-image master + + CrImage::Operation::MaskApply - Crystal Image master-dev @@ -34,12 +34,12 @@

- cr-image + Crystal Image

- master + master-dev
@@ -51,117 +51,142 @@

@@ -416,7 +466,7 @@


- [View source] + [View source]
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- [View source] + [View source]
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- [View source] + [View source]
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- [View source] + [View source]
diff --git a/docs/CrImage/Operation/VerticalBlur.html b/docs/CrImage/Operation/VerticalBlur.html index 07b14e1..b9335d6 100644 --- a/docs/CrImage/Operation/VerticalBlur.html +++ b/docs/CrImage/Operation/VerticalBlur.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Operation::VerticalBlur - cr-image master + + CrImage::Operation::VerticalBlur - Crystal Image master-dev @@ -34,12 +34,12 @@

- cr-image + Crystal Image

- master + master-dev
@@ -51,117 +51,142 @@

@@ -365,7 +415,7 @@


- [View source] + [View source]
diff --git a/docs/CrImage/RGBAImage.html b/docs/CrImage/RGBAImage.html index 0e67811..afeabfa 100644 --- a/docs/CrImage/RGBAImage.html +++ b/docs/CrImage/RGBAImage.html @@ -4,16 +4,16 @@ - - + + - - CrImage::RGBAImage - cr-image master + + CrImage::RGBAImage - Crystal Image master-dev @@ -34,12 +34,12 @@

- cr-image + Crystal Image

- master + master-dev
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- [View source] + [View source]
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- [View source] + [View source]
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- [View source] + [View source]
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- [View source] + [View source]
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- [View source] + [View source]
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- [View source] + [View source]
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- [View source] + [View source] + +
+ + +
+
+ + def to_stumpy : StumpyCore::Canvas + + # +
+ +
+
+ + [View source]
@@ -1365,7 +1704,7 @@


- [View source] + [View source]
@@ -1381,7 +1720,7 @@


- [View source] + [View source]
diff --git a/docs/CrImage/RGBAImage/Pixel.html b/docs/CrImage/RGBAImage/Pixel.html new file mode 100644 index 0000000..cac6f5e --- /dev/null +++ b/docs/CrImage/RGBAImage/Pixel.html @@ -0,0 +1,548 @@ + + + + + + + + + + + + + + + + CrImage::RGBAImage::Pixel - Crystal Image master-dev + + + + + +
+
+
+ +
+ +
+

+ + Crystal Image + +

+ + + master-dev + +
+
+ + + +
+ + +
+
+ + +
+

+ + struct CrImage::RGBAImage::Pixel + +

+ + + + + + + + + + + + + + + + + + + + +

+ + + + Defined in: +

+ + + + cr-image/rgba_image.cr + + +
+ + + + + + +

+ + + + Constructors +

+ + + + + + +

+ + + + Instance Method Summary +

+ + + + + + +
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
+ + +

+ + + + Constructor Detail +

+ +
+
+ + def self.new(red : UInt8, green : UInt8, blue : UInt8, alpha : UInt8) + + # +
+ +
+
+ + [View source] + +
+
+ + + + + + +

+ + + + Instance Method Detail +

+ +
+
+ + def alpha : UInt8 + + # +
+ +
+
+ +
+
+ +
+
+ + def blue : UInt8 + + # +
+ +
+
+ +
+
+ +
+
+ + def clone + + # +
+ +
+
+ + [View source] + +
+
+ +
+
+ + def copy_with(red _red = @red, green _green = @green, blue _blue = @blue, alpha _alpha = @alpha) + + # +
+ +
+
+ + [View source] + +
+
+ +
+
+ + def green : UInt8 + + # +
+ +
+
+ +
+
+ +
+
+ + def red : UInt8 + + # +
+ +
+
+ +
+
+ + + + + +
+ + + diff --git a/docs/CrImage/Region.html b/docs/CrImage/Region.html index 9a25163..cdef1b4 100644 --- a/docs/CrImage/Region.html +++ b/docs/CrImage/Region.html @@ -4,16 +4,16 @@ - - + + - - CrImage::Region - cr-image master + + CrImage::Region - Crystal Image master-dev @@ -34,12 +34,12 @@

- cr-image + Crystal Image

- master + master-dev
@@ -51,117 +51,142 @@

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- [View source] + [View source]
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- [View source] + [View source]
diff --git a/docs/Pluto.html b/docs/Pluto.html new file mode 100644 index 0000000..a3a9a6e --- /dev/null +++ b/docs/Pluto.html @@ -0,0 +1,331 @@ + + + + + + + + + + + + + + + + Pluto - cr-image master-dev + + + + + +
+
+
+ +
+ +
+

+ + cr-image + +

+ + + master-dev + +
+
+ + + +
+ + +
+
+ + +
+

+ + module Pluto + +

+ + + + + + + + + + + + + + + + + + +

+ + + + Defined in: +

+ + + lib/pluto/src/pluto.cr + +
+ + + lib/pluto/src/pluto/channel_type.cr + +
+ + + pluto.cr + +
+ + + + + + + + + + + + + + +
+ +
+ + + + + + + + + +
+ + + diff --git a/docs/Pluto/ImageGA.html b/docs/Pluto/ImageGA.html new file mode 100644 index 0000000..fbb1866 --- /dev/null +++ b/docs/Pluto/ImageGA.html @@ -0,0 +1,567 @@ + + + + + + + + + + + + + + + + Pluto::ImageGA - cr-image master-dev + + + + + +
+
+
+ +
+ +
+

+ + cr-image + +

+ + + master-dev + +
+
+ + + +
+ + +
+
+ + +
+

+ + class Pluto::ImageGA + +

+ + + + + + + + + + + +

+ + + + Included Modules +

+
    + +
  • Pluto::Format::JPEG
    • + +
  • Pluto::Format::PNG
    • + +
  • Pluto::Format::PPM
    • + +
  • Pluto::Format::WebP
    • + +
  • Pluto::Operation::BilinearResize
    • + +
  • Pluto::Operation::BoxBlur
    • + +
  • Pluto::Operation::Brightness
    • + +
  • Pluto::Operation::ChannelSwap
    • + +
  • Pluto::Operation::Contrast
    • + +
  • Pluto::Operation::Crop
    • + +
  • Pluto::Operation::GaussianBlur
    • + +
  • Pluto::Operation::HorizontalBlur
    • + +
  • Pluto::Operation::VerticalBlur
    • + +
+ + + + + + + + + + +

+ + + + Defined in: +

+ + + lib/pluto/src/pluto/image_ga.cr + +
+ + + pluto.cr + +
+ + + + + + + + + + +

+ + + + Instance Method Summary +

+ + + + + + +
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
+ + + + + + +

+ + + + Instance Method Detail +

+ +
+
+ + def to_crimage : CrImage::GrayscaleImage + + # +
+ +
+
+ +
+
+ + + + + +
+ + + diff --git a/docs/Pluto/ImageRGBA.html b/docs/Pluto/ImageRGBA.html new file mode 100644 index 0000000..249189a --- /dev/null +++ b/docs/Pluto/ImageRGBA.html @@ -0,0 +1,567 @@ + + + + + + + + + + + + + + + + Pluto::ImageRGBA - cr-image master-dev + + + + + +
+
+
+ +
+ +
+

+ + cr-image + +

+ + + master-dev + +
+
+ + + +
+ + +
+
+ + +
+

+ + class Pluto::ImageRGBA + +

+ + + + + + + + + + + +

+ + + + Included Modules +

+
    + +
  • Pluto::Format::JPEG
    • + +
  • Pluto::Format::PNG
    • + +
  • Pluto::Format::PPM
    • + +
  • Pluto::Format::WebP
    • + +
  • Pluto::Operation::BilinearResize
    • + +
  • Pluto::Operation::BoxBlur
    • + +
  • Pluto::Operation::Brightness
    • + +
  • Pluto::Operation::ChannelSwap
    • + +
  • Pluto::Operation::Contrast
    • + +
  • Pluto::Operation::Crop
    • + +
  • Pluto::Operation::GaussianBlur
    • + +
  • Pluto::Operation::HorizontalBlur
    • + +
  • Pluto::Operation::VerticalBlur
    • + +
+ + + + + + + + + + +

+ + + + Defined in: +

+ + + lib/pluto/src/pluto/image_rgba.cr + +
+ + + pluto.cr + +
+ + + + + + + + + + +

+ + + + Instance Method Summary +

+ + + + + + +
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
+ + + + + + +

+ + + + Instance Method Detail +

+ +
+
+ + def to_crimage : CrImage::RGBAImage + + # +
+ +
+
+ +
+
+ + + + + +
+ + + diff --git a/docs/StumpyCore.html b/docs/StumpyCore.html new file mode 100644 index 0000000..4052d27 --- /dev/null +++ b/docs/StumpyCore.html @@ -0,0 +1,414 @@ + + + + + + + + + + + + + + + + StumpyCore - Crystal Image master-dev + + + + + +
+
+
+ +
+ +
+

+ + Crystal Image + +

+ + + master-dev + +
+
+ + + +
+ + +
+
+ + +
+

+ + module StumpyCore + +

+ + + + + +

+ + + + Overview +

+ +

A module owned by StumpyCr

+ + + + + + + + + + + + + + +

+ + + + Defined in: +

+ + + + lib/stumpy_core/src/stumpy_core/canvas.cr + + +
+ + + + lib/stumpy_core/src/stumpy_core/rgba.cr + + +
+ + + + lib/stumpy_core/src/stumpy_core/rgba/css_constants.cr + + +
+ + + + lib/stumpy_core/src/stumpy_core/rgba/from_grayscale.cr + + +
+ + + + lib/stumpy_core/src/stumpy_core/rgba/from_hex.cr + + +
+ + + + lib/stumpy_core/src/stumpy_core/rgba/from_hsl_hsv.cr + + +
+ + + + lib/stumpy_core/src/stumpy_core/rgba/from_relative.cr + + +
+ + + + lib/stumpy_core/src/stumpy_core/rgba/from_rgba.cr + + +
+ + + + lib/stumpy_core/src/stumpy_core/rgba/mixing.cr + + +
+ + + + lib/stumpy_core/src/stumpy_core/utils.cr + + +
+ + + + stumpy.cr + + +
+ + + + + + + + + + + + + + +
+ +
+ + + + + + + + + +
+ + + diff --git a/docs/StumpyCore/Canvas.html b/docs/StumpyCore/Canvas.html new file mode 100644 index 0000000..693f0e3 --- /dev/null +++ b/docs/StumpyCore/Canvas.html @@ -0,0 +1,429 @@ + + + + + + + + + + + + + + + + StumpyCore::Canvas - Crystal Image master-dev + + + + + +
+
+
+ +
+ +
+

+ + Crystal Image + +

+ + + master-dev + +
+
+ + + +
+ + +
+
+ + +
+

+ + class StumpyCore::Canvas + +

+ + + + + + + +

+ + + + Overview +

+ +

A canvas is 2D array of RGBA pixels

+

To create a canvas of size 400 x 200

+
canvas = StumpyCore::Canvas.new(400, 200)
+

The default background color is transparent, +but it can be passed in as a parameter or as a block +that returns the color value for each {x, y} pair.

+
canvas2 = StumpyCore::Canvas.new(400, 200, RGBA::WHITE)
+
canvas3 = StumpyCore::Canvas.new(256, 256) do |x, y|
+  RGBA.from_rgb_n(x, y, 255, 8)
+end
+

image

+

Because of the way pixels are stored in a Slice, +Canvases are limited to Int32::MAX = 2147483647 pixels in total, +e.g. a maximal size of 46340x46340 for a square image.

+ + + + + + + + + + + + + + +

+ + + + Defined in: +

+ + + + lib/stumpy_core/src/stumpy_core/canvas.cr + + +
+ + + + stumpy.cr + + +
+ + + + + + + + + + +

+ + + + Instance Method Summary +

+ + + + + + +
+ + + + + + + + + + + + + + + + + + + + + +
+ + + + + + +

+ + + + Instance Method Detail +

+ +
+
+ + def to_crimage : CrImage::RGBAImage + + # +
+ +
+
+ + [View source] + +
+
+ + + + + +
+ + + diff --git a/docs/index.html b/docs/index.html index 618f1f7..cac858f 100644 --- a/docs/index.html +++ b/docs/index.html @@ -4,16 +4,16 @@ - - + + - - cr-image master + + Crystal Image master-dev @@ -34,12 +34,12 @@

- cr-image + Crystal Image

- master + master-dev
@@ -51,117 +51,142 @@

    -
  • +
  • CrImage
      -
    • +
    • ChannelType
      • -
    • +
    • Color
      • -
    • +
    • Exception
      • -
    • +
    • Format
      • -
    • +
    • GrayscaleImage + + +
      • -
    • +
    • Image
      • -
    • +
    • Mask
      • -
    • +
    • Operation
        -
      • +
      • BilinearResize
        • -
      • +
      • BoxBlur
        • -
      • +
      • Brightness
        • -
      • +
      • ChannelSwap
        • -
      • +
      • Contrast
        • -
      • +
      • Crop
        • -
      • +
      • Draw
        • -
      • +
      • GaussianBlur
        • -
      • +
      • HistogramEqualize + + +
        • + +
      • + StumpyCore + + @@ -251,7 +301,10 @@ 

        require "cr-image"
 require "cr-image/jpeg"
 require "cr-image/png"
-require "cr-image/webp"
        +require "cr-image/webp" + +# Or, alternatively +require "cr-image/all_formats"

        Yields this image:

        Cropped example of moon

        See documentation for more examples.

        +

        + +(Pluto)[https://github.com/phenopolis/pluto] and (Stumpy)[https://github.com/stumpycr/stumpy_core] Conversion

        +

        If your library or application already uses Pluto or Stumpy and you want to use +some of the functionality of this library, CrImage also provides some optional +conversion methods:

        +
        require "cr-image/pluto"
+pluto_image # => Pluto::ImageRGBA
+pluto_image_rgba.to_crimage # => CrImage::RGBAImage
+
+cr_image # => CrImage::RGBAImage
+cr_image.to_pluto # => Pluto::ImageRGBA
        +
        require "cr-image/stumpy"
+stumpy_canvas # => StumpyCore::Canvas
+stumpy_canvas.to_crimage # => CrImage::RGBAImage
+
+cr_image # => CrImage::RGBAImage
+cr_image.to_stumpy # => StumpyCore::Canvas
        +

        NOTE: Stumpy uses UInt16 for its underlying raw image storage per channel per pixel, while Pluto and +CrImage uses UInt8. Converting from a Stumpy Canvas object to RGBAImage may lose quality if the original +image used 16 bit color channels (i.e. 16-bit PNG). Most image formats tend to use 8-bit color channels.

        Crystal Image (Processing)

        \n\nThis shard aims to provide feature rich image processing abilities, both for the purpose of\nimage manipulation as well as feature / information extraction from those images.\n\nThe code here takes imense inspiration from [Pluto](https://github.com/phenopolis/pluto) and [Stumpy](https://github.com/stumpycr/stumpy_core), with\nan eventual goal to be able to convert between images of this and those libraries.\n\nAll sample images used are from [Unsplash](https://unsplash.com/).\n\n## Installation\n\n1. Add the dependency to your `shard.yml`:\n\n ```yaml\n dependencies:\n cr-image:\n github: vici37/cr-image\n ```\n\n2. Run `shards install`\n\n## Usage\n\nCrImage supports the formats:\n* PPM\n* JPEG (requires `libturbojpeg`)\n* PNG (requirens `libspng`)\n* WebP (requires `libwebp`)\n\nFor the formats that require a linked library, they must be `require`d explicitly:\n\n```crystal\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\nrequire \"cr-image/png\"\nrequire \"cr-image/webp\"\n```\n\n### Example\n\nAssuming an image `moon.jpg` already exists\n\n\"Picture\n\n```crystal\nrequire \"cr-image\"\n\nimage = CrImage::RGBAImage.open(\"moon.jpg\")\n\n# create a mask identifying all pixels with light (i.e. the moon)\nmoon_mask = image\n .to_gray\n .threshold(8) # pixels are UInt8, with 0 as black and 255 as white\n\n# Crop out the moon from the image, and save it to a new file\nimage.crop(\n moon_mask.region # smallest area that encompasses all true bits in mask\n).save(\"moon_cropped.jpg\")\n\n```\n\nYields this image:\n\n\"Cropped\n\n[See documentation](http://troy.sornson.io/cr-image/) for more examples.\n\n## Development\n\nThis requires `libwebp`, `libspng`, and `libturbojpeg` to run. Then:\n\n```\n> make test\n```\n\nTo ensure all tests run and pass.\n\n## Contributing\n\n1. [Fork it](https://github.com/Vici37/cr-image/fork)\n2. Create your feature branch (`git checkout -b my-new-feature`)\n3. Commit your changes (`git commit -am 'Add some feature'`)\n4. Push to the branch (`git push origin my-new-feature`)\n5. Create a new Pull Request\n\n## Contributors\n\n- [Troy Sornson](https://github.com/Vici37) - creator and maintainer\n","program":{"html_id":"cr-image/toplevel","path":"toplevel.html","kind":"module","full_name":"Top Level Namespace","name":"Top Level Namespace","abstract":false,"locations":[],"repository_name":"cr-image","program":true,"enum":false,"alias":false,"const":false,"types":[{"html_id":"cr-image/CrImage","path":"CrImage.html","kind":"module","full_name":"CrImage","name":"CrImage","abstract":false,"locations":[{"filename":"src/cr-image/operation/bilinear_resize.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/bilinear_resize.cr#L14"},{"filename":"src/cr-image/region.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/region.cr#L1"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"types":[{"html_id":"cr-image/CrImage/ChannelType","path":"CrImage/ChannelType.html","kind":"enum","full_name":"CrImage::ChannelType","name":"ChannelType","abstract":false,"ancestors":[{"html_id":"cr-image/Enum","kind":"struct","full_name":"Enum","name":"Enum"},{"html_id":"cr-image/Comparable","kind":"module","full_name":"Comparable","name":"Comparable"},{"html_id":"cr-image/Value","kind":"struct","full_name":"Value","name":"Value"},{"html_id":"cr-image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/channel_type.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/channel_type.cr#L4"}],"repository_name":"cr-image","program":false,"enum":true,"alias":false,"const":false,"constants":[{"id":"Red","name":"Red","value":"0"},{"id":"Green","name":"Green","value":"1"},{"id":"Blue","name":"Blue","value":"2"},{"id":"Gray","name":"Gray","value":"3"},{"id":"Alpha","name":"Alpha","value":"4"}],"namespace":{"html_id":"cr-image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Enum representing different image channels supported by CrImage\n\nSee `RGBAImage#each_channel` and `GrayscaleImage#each_channel`","summary":"

        Enum representing different image channels supported by CrImage

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        Provides a convenience method for saving image files to the filesystem.

        ","types":[{"html_id":"cr-image/CrImage/Format/Open","path":"CrImage/Format/Open.html","kind":"module","full_name":"CrImage::Format::Open","name":"Open","abstract":false,"locations":[{"filename":"src/cr-image/format/open.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/format/open.cr#L12"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"cr-image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides a convenience method for opening up image files from the filesystem.\nCurrently supports:\n* PPM (`.ppm`)\n* WebP (`.webp`)\n* JPEG (`.jpeg`, `.jpg`)\n* PNG (`.png`)\n\n```\nimage = CrImage::RGBAImage.open(\"image.jpg\")\n```\nSee `Save` for a convenience method to write to the filesystem.","summary":"

        Provides a convenience method for opening up image files from the filesystem.

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        Reads this image from file using the provided filename.

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        Provides methods to read from and write to PPM.

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        Output this image to io using PPM image encoding

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        Write this image to file using the provided filename.

        ","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/save.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/format/save.cr#L20"},"def":{"name":"save","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"File.open(filename, \"w\") do |file|\n {% if true %}\n case filename\n {% for format in SUPPORTED_FORMATS %}\n when .ends_with?({{ format[:extension] }}) then to_{{ format[:method].id }}(file)\n {% end %}\n else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map do |__arg0|\n __arg0[:extension].id\n end.join(\", \")).id }}\"\n end\n {% end %}\nend"}}]}]},{"html_id":"cr-image/CrImage/GrayscaleImage","path":"CrImage/GrayscaleImage.html","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage","abstract":false,"superclass":{"html_id":"cr-image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},"ancestors":[{"html_id":"cr-image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"cr-image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"cr-image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"cr-image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"cr-image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"cr-image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"},{"html_id":"cr-image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"cr-image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"cr-image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"cr-image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"cr-image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"cr-image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"cr-image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"cr-image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"cr-image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},{"html_id":"cr-image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"cr-image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/grayscale_image.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/grayscale_image.cr#L13"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"cr-image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"cr-image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"cr-image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"cr-image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"cr-image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"cr-image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"cr-image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"cr-image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"cr-image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"cr-image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"cr-image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"cr-image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"cr-image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"cr-image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"}],"extended_modules":[{"html_id":"cr-image/CrImage/Format/Open","kind":"module","full_name":"CrImage::Format::Open","name":"Open"}],"namespace":{"html_id":"cr-image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"An image in Grayscale. These image types are the easiest to perform feature and information extraction from, where\nthere is only one channel to examine, and so has methods for constructing `Mask`s from (see `#threshold` below).\n\nAn `RGBAImage` would become a `GrayscaleImage` this way:\n```\nimage.to_gray\n```\n\n\"Woman\n\"Woman","summary":"

        An image in Grayscale.

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        Read image_data as PPM encoded bytes

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        Read bytes from io as PPM encoded

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        Create a GrayscaleImage from a set of color channels (delegates to RGBAImage#to_gray)

        ","abstract":false,"args":[{"name":"red","external_name":"red","restriction":"Array(UInt8)"},{"name":"green","external_name":"green","restriction":"Array(UInt8)"},{"name":"blue","external_name":"blue","restriction":"Array(UInt8)"},{"name":"alpha","external_name":"alpha","restriction":"Array(UInt8)"},{"name":"width","external_name":"width","restriction":"Int32"},{"name":"height","external_name":"height","restriction":"Int32"}],"args_string":"(red : Array(UInt8), green : Array(UInt8), blue : Array(UInt8), alpha : Array(UInt8), width : Int32, height : Int32)","args_html":"(red : Array(UInt8), green : Array(UInt8), blue : Array(UInt8), alpha : Array(UInt8), width : Int32, height : Int32)","location":{"filename":"src/cr-image/grayscale_image.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/grayscale_image.cr#L20"},"def":{"name":"new","args":[{"name":"red","external_name":"red","restriction":"Array(UInt8)"},{"name":"green","external_name":"green","restriction":"Array(UInt8)"},{"name":"blue","external_name":"blue","restriction":"Array(UInt8)"},{"name":"alpha","external_name":"alpha","restriction":"Array(UInt8)"},{"name":"width","external_name":"width","restriction":"Int32"},{"name":"height","external_name":"height","restriction":"Int32"}],"visibility":"Public","body":"(RGBAImage.new(red, green, blue, alpha, width, height)).to_gray"}},{"html_id":"new(gray:Array(UInt8),alpha:Array(UInt8),width:Int32,height:Int32)-class-method","name":"new","abstract":false,"args":[{"name":"gray","external_name":"gray","restriction":"::Array(::UInt8)"},{"name":"alpha","external_name":"alpha","restriction":"::Array(::UInt8)"},{"name":"width","external_name":"width","restriction":"::Int32"},{"name":"height","external_name":"height","restriction":"::Int32"}],"args_string":"(gray : Array(UInt8), alpha : Array(UInt8), width : Int32, height : Int32)","args_html":"(gray : Array(UInt8), alpha : Array(UInt8), width : Int32, height : Int32)","location":{"filename":"src/cr-image/grayscale_image.cr","line_number":24,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/grayscale_image.cr#L24"},"def":{"name":"new","args":[{"name":"gray","external_name":"gray","restriction":"::Array(::UInt8)"},{"name":"alpha","external_name":"alpha","restriction":"::Array(::UInt8)"},{"name":"width","external_name":"width","restriction":"::Int32"},{"name":"height","external_name":"height","restriction":"::Int32"}],"visibility":"Public","body":"_ = allocate\n_.initialize(gray, alpha, width, height)\nif _.responds_to?(:finalize)\n ::GC.add_finalizer(_)\nend\n_\n"}},{"html_id":"new(gray:Array(UInt8),width:Int32,height:Int32)-class-method","name":"new","doc":"Create a GrayscaleImage with only an `Array(UInt8)` (alpha channel initialized as `255` throughout)","summary":"

        Create a GrayscaleImage with only an Array(UInt8) (alpha channel initialized as 255 throughout)

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        Return the Array(UInt8) corresponding to channel_type

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        Set the underlying Array(UInt8) of channel_type to the new channel.

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        Return #alpha channel

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        Run provided block with the ChannelType::Gray and ChannelType::Alpha channels and channel types.

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        Return the "#green" channel (returns #gray)

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        Height of image

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        Invert grayscale pixels (replace each pixel will 255 - p for all p in @gray).

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        Construct a Mask from this GrayscaleImage using the passed in block to determine if a given pixel should be true or not

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        Common base class for GrayscaleImage and RGBAImage.

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        Return the alpha channel

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        Construct a new Mask from an array of BitArray.

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        Construct a new Mask with a set width and bits from #bits

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        Construct a new Mask of width x height using &block to determine if a bit should be true or not (passed in x and y coordinates)

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        Set the bits for partial rows xs and partial columns ys

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        Create a new Mask from this one without modifying it

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        Returns the bounding box of the mask where all true bits are contained.

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        Convert this Mask to a GrayscaleImage, with false bits becoming 0, and true bits becoming 255

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        Resizes image to new dimensions

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        Increases contrast of an image

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width} pixels beyond width of the image (#{width})\")\nend\nif (y + new_height) > height\n raise(\"Crop dimensions extend #{(y + new_height) - height} pixels beyond height of the image (#{height})\")\nend\nnew_size = new_width * new_height\nheight_offset = y * width\neach_channel do |channel, channel_type|\n resized_channel = Array.new(new_size) do\n 0_u8\n end\n new_height.times do |new_y|\n orig_index = (height_offset + (new_y * width)) + x\n resized_channel[new_y * new_width, new_width] = channel[orig_index, new_width]\n end\n self[channel_type] = resized_channel\nend\n@width = new_width\n@height = new_height\nself\n"}},{"html_id":"crop!(region:Region):self-instance-method","name":"crop!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"}],"args_string":"(region : Region) : self","args_html":"(region : Region) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/crop.cr#L28"},"def":{"name":"crop!","args":[{"name":"region","external_name":"region","restriction":"Region"}],"return_type":"self","visibility":"Public","body":"crop!(*region.to_tuple)"}}]},{"html_id":"cr-image/CrImage/Operation/Draw","path":"CrImage/Operation/Draw.html","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw","abstract":false,"locations":[{"filename":"src/cr-image/operation/draw.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/draw.cr#L15"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"cr-image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"cr-image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"cr-image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Draws shapes in the image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.draw_square(40, 30, 80, 80, CrImage::Color.of(\"#00f\"))\nimage.draw_circle(80, 70, 40, CrImage::Color.of(\"#00f\"))\n```\n\"Woman\n\"Woman\n\nCan also use the `fill: true` parameter to fill in the drawn shapes","summary":"

        Draws shapes in the image

        ","instance_methods":[{"html_id":"draw_circle(x:Int,y:Int,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":56,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/draw.cr#L56"},"def":{"name":"draw_circle","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":4,"return_type":"self","visibility":"Public","body":"clone.draw_circle!(x, y, radius, color, fill: fill)"}},{"html_id":"draw_circle(region:Region,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle","doc":"Draw a circle around the region's center (see `Region#center`)","summary":"

        Draw a circle around the region's center (see Region#center)

        ","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":52,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/draw.cr#L52"},"def":{"name":"draw_circle","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":3,"return_type":"self","visibility":"Public","body":"clone.draw_circle!(*region.center, radius, color, fill: fill)"}},{"html_id":"draw_circle!(region:Region,color:Color,*,fill:Bool=false,radius:Int32|Nil=nil):self-instance-method","name":"draw_circle!","doc":"Draw a circle around the region's center (see `Region#center`)","summary":"

        Draw a circle around the region's center (see Region#center)

        ","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"},{"name":"radius","default_value":"nil","external_name":"radius","restriction":"Int32 | ::Nil"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false, radius : Int32 | Nil = nil) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false, radius : Int32 | Nil = nil) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":61,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/draw.cr#L61"},"def":{"name":"draw_circle!","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"},{"name":"radius","default_value":"nil","external_name":"radius","restriction":"Int32 | ::Nil"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"draw_circle!(*region.center, radius, color, fill: fill)"}},{"html_id":"draw_square(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/draw.cr#L20"},"def":{"name":"draw_square","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":5,"return_type":"self","visibility":"Public","body":"clone.draw_square!(x, y, box_width, box_height, color, fill: fill)"}},{"html_id":"draw_square(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/draw.cr#L16"},"def":{"name":"draw_square","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"clone.draw_square!(region, color, fill: fill)"}},{"html_id":"draw_square!(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/draw.cr#L28"},"def":{"name":"draw_square!","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":5,"return_type":"self","visibility":"Public","body":"if (x + box_width) > width\n raise(\"Box dimensions extend #{(x + box_width) - width} pixels beyond width of the image (#{width})\")\nend\nif (y + box_height) > height\n raise(\"Box dimensions extend #{(y + box_height) - height} pixels beyond height of the image (#{height})\")\nend\nx_i = x.to_i\ny_i = y.to_i\neach_channel do |channel, channel_type|\n channel[( (y_i * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n color[channel_type]\n end\n channel[((y_i + box_height) * width) + x_i, box_width] = Array(UInt8).new(box_width) do\n color[channel_type]\n end\n box_height.times do |i|\n if i == 0\n next\n end\n if fill\n channel[( ((y_i + i) * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n color[channel_type]\n end\n else\n channel.unsafe_put(((y_i + i) * width) + x_i, color[channel_type])\n channel.unsafe_put((((y_i + i) * width) + x_i) + box_width, color[channel_type])\n end\n end\nend\nself\n"}},{"html_id":"draw_square!(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":24,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/draw.cr#L24"},"def":{"name":"draw_square!","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"draw_square!(*region.to_tuple, color, fill: fill)"}}]},{"html_id":"cr-image/CrImage/Operation/GaussianBlur","path":"CrImage/Operation/GaussianBlur.html","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/gaussian_blur.cr#L13"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"cr-image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"cr-image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"cr-image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Applies a 3x3 Gaussian blur. Implementation derived from [here](https://blog.ivank.net/fastest-gaussian-blur.html)\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.gaussian_blur(1).save(\"gaussian_1_sample.jpg\")\nimage.gaussian_blur(5).save(\"gaussian_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"

        Applies a 3x3 Gaussian blur.

        ","instance_methods":[{"html_id":"gaussian_blur(sigma:Int32):self-instance-method","name":"gaussian_blur","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/gaussian_blur.cr#L14"},"def":{"name":"gaussian_blur","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.gaussian_blur!(sigma)"}},{"html_id":"gaussian_blur!(sigma:Int32):self-instance-method","name":"gaussian_blur!","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/gaussian_blur.cr#L18"},"def":{"name":"gaussian_blur!","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"n = 3\nw_ideal = Math.sqrt((((12 * sigma) * sigma) / n) + 1)\nw_l = w_ideal.floor.to_i\nif (w_l % 2) == 0\n w_l = w_l - 1\nend\nm_ideal = (((((12 * sigma) * sigma) - ((n * w_l) * w_l)) - ((4 * n) * w_l)) - (3 * n)) / ((-4 * w_l) - 4)\nm = m_ideal.round\nsizes = [] of Int32\nn.times do |i|\n sizes << (if i < m\n w_l\n else\n w_l + 2\n end)\nend\nbox_blur!(((sizes.unsafe_fetch(0)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(1)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(2)) - 1) // 2)\nself\n"}}]},{"html_id":"cr-image/CrImage/Operation/HistogramEqualize","path":"CrImage/Operation/HistogramEqualize.html","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize","abstract":false,"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":19,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L19"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"cr-image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"cr-image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"cr-image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Provides methods for histogram and histogram equalization. Follows method outlined [here](https://www.sci.utah.edu/~acoste/uou/Image/project1/Arthur_COSTE_Project_1_report.html)\n\nIf an image is particularly dark or particularly bright with low contrast, the `Operation::Contrast#contrast` method will only\nmake the image darker or lighter. For images like these, equalizing the image along its histogram will produce better results.\n\n\"A\n\n```\nimage.contrast(10).save(\"contrast.jpg\")\nimage.histogram_equalize.save(\"equalized.jpg\")\n```\n\"Darker\n\"A\n\nThis method does not work well when a given method has a bimodal distribution of color pixels. For example:\n\n\"Woman\n\"Highly","summary":"

        Provides methods for histogram and histogram equalization.

        ","instance_methods":[{"html_id":"histogram(channel_type:ChannelType):Histogram-instance-method","name":"histogram","abstract":false,"args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(channel_type : ChannelType) : Histogram","args_html":"(channel_type : ChannelType) : Histogram","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":93,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L93"},"def":{"name":"histogram","args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"return_type":"Histogram","visibility":"Public","body":"Histogram.new(self, channel_type)"}},{"html_id":"histogram_equalize:self-instance-method","name":"histogram_equalize","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":97,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L97"},"def":{"name":"histogram_equalize","return_type":"self","visibility":"Public","body":"clone.histogram_equalize!"}},{"html_id":"histogram_equalize!:self-instance-method","name":"histogram_equalize!","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":101,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L101"},"def":{"name":"histogram_equalize!","return_type":"self","visibility":"Public","body":"each_channel do |channel, channel_type|\n if channel_type.alpha?\n next\n end\n remap = (histogram(channel_type)).equalize\n size.times do |i|\n channel.unsafe_put(i, remap[channel.unsafe_fetch(i)])\n end\nend\nself\n"}}],"types":[{"html_id":"cr-image/CrImage/Operation/HistogramEqualize/Histogram","path":"CrImage/Operation/HistogramEqualize/Histogram.html","kind":"class","full_name":"CrImage::Operation::HistogramEqualize::Histogram","name":"Histogram","abstract":false,"superclass":{"html_id":"cr-image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"cr-image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"cr-image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":21,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L21"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"cr-image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},"doc":"A histogram of an `Image` for a specific `ChannelType`","summary":"

        A histogram of an Image for a specific ChannelType

        ","constructors":[{"html_id":"new(image:Image,channel_type:ChannelType)-class-method","name":"new","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(image : Image, channel_type : ChannelType)","args_html":"(image : Image, channel_type : ChannelType)","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L22"},"def":{"name":"new","args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"visibility":"Public","body":"_ = allocate\n_.initialize(image, channel_type)\nif _.responds_to?(:finalize)\n ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"cdf:Hash(UInt8,Float64)-instance-method","name":"cdf","doc":"Get the cumulative distribution for the image's histogram","summary":"

        Get the cumulative distribution for the image's histogram

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":54,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L54"},"def":{"name":"cdf","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"total = 0_f64\n@cumulative_distribution_histogram || (@cumulative_distribution_histogram = normalize.map do |pixel, probability|\n original = total\n total = total + probability\n {pixel, original}\nend.to_h)\n"}},{"html_id":"counts:Hash(UInt8,Int32)-instance-method","name":"counts","doc":"Get the raw counts for a given pixel value (0-255) in the image","summary":"

        Get the raw counts for a given pixel value (0-255) in the image

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L28"},"def":{"name":"counts","return_type":"Hash(UInt8, Int32)","visibility":"Public","body":"@internal_hist || (@internal_hist = calculate_counts)"}},{"html_id":"equalize:Hash(UInt8,UInt8)-instance-method","name":"equalize","doc":"Remap the cumalitive distribution of pixels to get a new, more spread out pixel value","summary":"

        Remap the cumalitive distribution of pixels to get a new, more spread out pixel value

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":64,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L64"},"def":{"name":"equalize","return_type":"Hash(UInt8, UInt8)","visibility":"Public","body":"cdf.map do |pixel, cumalative|\n {pixel, ((cumalative * 255).clamp(0, 255)).to_u8}\nend.to_h"}},{"html_id":"normalize:Hash(UInt8,Float64)-instance-method","name":"normalize","doc":"Get pixel counts normalized - all values between 0.0 and 1.0","summary":"

        Get pixel counts normalized - all values between 0.0 and 1.0

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":45,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L45"},"def":{"name":"normalize","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"counts.map do |pixel, count|\n {pixel, count.to_f / @image.size}\nend.to_h"}}]}]},{"html_id":"cr-image/CrImage/Operation/HorizontalBlur","path":"CrImage/Operation/HorizontalBlur.html","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/horizontal_blur.cr#L13"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"cr-image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"cr-image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"cr-image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the horizontal axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.horizontal_blur(1).save(\"horizontal_1_sample.jpg\")\nimage.horizontal_blur(5).save(\"horizontal_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"

        Blur an image along the horizontal axis

        ","instance_methods":[{"html_id":"horizontal_blur(value:Int32):self-instance-method","name":"horizontal_blur","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/horizontal_blur.cr#L14"},"def":{"name":"horizontal_blur","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.horizontal_blur!(value)"}},{"html_id":"horizontal_blur!(value:Int32):self-instance-method","name":"horizontal_blur!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/horizontal_blur.cr#L18"},"def":{"name":"horizontal_blur!","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((value + value) + 1)\neach_channel do |channel|\n @height.times do |y|\n c_index : Int32 = y * @width\n l_index : Int32 = c_index\n r_index : Int32 = c_index + value\n f_value : Int32 = (channel.unsafe_fetch(c_index)).to_i\n l_value : Int32 = (channel.unsafe_fetch((c_index + @width) - 1)).to_i\n c_value : Int32 = (value + 1) * f_value\n (0..(value - 1)).each do\n c_value = c_value + (channel.unsafe_fetch(c_index))\n end\n (0..value).each do\n c_value = c_value + ((channel.unsafe_fetch(r_index)).to_i - f_value)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n r_index = r_index + 1\n c_index = c_index + 1\n end\n ((value + 1)..((@width - value) - 1)).each do\n c_value = c_value + ((channel.unsafe_fetch(r_index)).to_i - (channel.unsafe_fetch(l_index)).to_i)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n r_index = r_index + 1\n l_index = l_index + 1\n c_index = c_index + 1\n end\n ((@width - value)..(@width - 1)).each do\n c_value = c_value + (l_value - (channel.unsafe_fetch(l_index)).to_i)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n l_index = l_index + 1\n c_index = c_index + 1\n end\n end\n (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]},{"html_id":"cr-image/CrImage/Operation/MaskApply","path":"CrImage/Operation/MaskApply.html","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply","abstract":false,"locations":[{"filename":"src/cr-image/operation/mask_apply.cr","line_number":27,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/mask_apply.cr#L27"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"cr-image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"cr-image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"cr-image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Apply a mask to an image\n\nTaking sample `image`:\n\n\"Woman\n\nAnd mask\n\n\"Black\n\n```\nmask = CrImage::Mask.new(image, false)\nmask[50..90, 65..75] = true\nmask.to_gray.save(\"apply_mask_mask.jpg\")\n\nimage.apply(mask).save(\"apply_mask.jpg\")\n\nimage.apply_color(mask, CrImage::Color.of(\"#00f\")).save(\"apply_mask_color.jpg\")\n\nimage.apply(mask) do |x, y, pixel, channel_type|\n Math.min(255, pixel + 50).to_u8 if channel_type.blue?\nend.save(\"apply_mask_block.jpg\")\n```\n\"Image\n\"Thin\n\"Thin","summary":"

        Apply a mask to an image

        ","instance_methods":[{"html_id":"apply(mask:Mask):self-instance-method","name":"apply","doc":"Black out all pixels but those found in the mask","summary":"

        Black out all pixels but those found in the mask

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":29,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/mask_apply.cr#L29"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"clone.apply!(mask)"}},{"html_id":"apply(mask:Mask,&block:Int32,Int32,UInt8,ChannelType->UInt8|Nil):self-instance-method","name":"apply","doc":"Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.\n\nDoes not change values not matched by the mask","summary":"

        Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":36,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/mask_apply.cr#L36"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(Int32, Int32, UInt8, ChannelType -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"clone.apply!(mask, &block)"}},{"html_id":"apply!(mask:Mask):self-instance-method","name":"apply!","doc":"TODO: add apply version that accepts 1+ ChannelType that the mask should apply to (i.e. make a background completely transparent, not just transparent black)","summary":"

        TODO add apply version that accepts 1+ ChannelType that the mask should apply to (i.e.

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":46,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/mask_apply.cr#L46"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel|\n channel.map_with_index! do |pixel, i|\n mask.at(i) ? pixel : 0_u8\n end\nend\nself\n"}},{"html_id":"apply!(mask:Mask,&block:Int32,Int32,UInt8,ChannelType->UInt8|Nil):self-instance-method","name":"apply!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":55,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/mask_apply.cr#L55"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(Int32, Int32, UInt8, ChannelType -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel, channel_type|\n channel.map_with_index! do |pixel, i|\n mask.at(i) ? (block.call(i % width, i // width, pixel, channel_type)) || pixel : pixel\n end\nend\nself\n"}},{"html_id":"apply_color(mask:Mask,color:Color):self-instance-method","name":"apply_color","doc":"Change the color of all pixels that match the mask","summary":"

        Change the color of all pixels that match the mask

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":41,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/mask_apply.cr#L41"},"def":{"name":"apply_color","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"clone.apply_color!(mask, color)"}},{"html_id":"apply_color!(mask:Mask,color:Color):self-instance-method","name":"apply_color!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":66,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/mask_apply.cr#L66"},"def":{"name":"apply_color!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"apply!(mask) do |_, _, _, channel_type|\n color[channel_type]\nend"}}]},{"html_id":"cr-image/CrImage/Operation/VerticalBlur","path":"CrImage/Operation/VerticalBlur.html","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/vertical_blur.cr#L13"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"cr-image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"cr-image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"cr-image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the vertical axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.vertical_blur(1).save(\"vertical_1_sample.jpg\")\nimage.vertical_blur(5).save(\"vertical_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"

        Blur an image along the vertical axis

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        An image with red, green, blue, and alpha color channels (i.e.

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        Return the green channel

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        Height of image

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        Return the red channel

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        Return the number of pixels in this image

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        Convert color image to GrayscaleImage, using the NTSC formula as default values.

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        Width of image

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        Crystal Image (Processing)

        \n\nThis shard aims to provide feature rich image processing abilities, both for the purpose of\nimage manipulation as well as feature / information extraction from those images.\n\nThe code here takes imense inspiration from [Pluto](https://github.com/phenopolis/pluto) and [Stumpy](https://github.com/stumpycr/stumpy_core), with\nan eventual goal to be able to convert between images of this and those libraries.\n\nAll sample images used are from [Unsplash](https://unsplash.com/).\n\n## Installation\n\n1. Add the dependency to your `shard.yml`:\n\n ```yaml\n dependencies:\n cr-image:\n github: vici37/cr-image\n ```\n\n2. Run `shards install`\n\n## Usage\n\nCrImage supports the formats:\n* PPM\n* JPEG (requires `libturbojpeg`)\n* PNG (requirens `libspng`)\n* WebP (requires `libwebp`)\n\nFor the formats that require a linked library, they must be `require`d explicitly:\n\n```crystal\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\nrequire \"cr-image/png\"\nrequire \"cr-image/webp\"\n\n# Or, alternatively\nrequire \"cr-image/all_formats\"\n```\n\n### Example\n\nAssuming an image `moon.jpg` already exists\n\n\"Picture\n\n```crystal\nrequire \"cr-image\"\n\nimage = CrImage::RGBAImage.open(\"moon.jpg\")\n\n# create a mask identifying all pixels with light (i.e. the moon)\nmoon_mask = image\n .to_gray\n .threshold(8) # pixels are UInt8, with 0 as black and 255 as white\n\n# Crop out the moon from the image, and save it to a new file\nimage.crop(\n moon_mask.region # smallest area that encompasses all true bits in mask\n).save(\"moon_cropped.jpg\")\n\n```\n\nYields this image:\n\n\"Cropped\n\n[See documentation](http://troy.sornson.io/cr-image/) for more examples.\n\n### (Pluto)[https://github.com/phenopolis/pluto] and (Stumpy)[https://github.com/stumpycr/stumpy_core] Conversion\n\nIf your library or application already uses Pluto or Stumpy and you want to use\nsome of the functionality of this library, CrImage also provides some optional\nconversion methods:\n\n```crystal\nrequire \"cr-image/pluto\"\npluto_image # => Pluto::ImageRGBA\npluto_image_rgba.to_crimage # => CrImage::RGBAImage\n\ncr_image # => CrImage::RGBAImage\ncr_image.to_pluto # => Pluto::ImageRGBA\n```\n\n```crystal\nrequire \"cr-image/stumpy\"\nstumpy_canvas # => StumpyCore::Canvas\nstumpy_canvas.to_crimage # => CrImage::RGBAImage\n\ncr_image # => CrImage::RGBAImage\ncr_image.to_stumpy # => StumpyCore::Canvas\n```\n\n*NOTE:* Stumpy uses `UInt16` for its underlying raw image storage per channel per pixel, while Pluto and\nCrImage uses `UInt8`. Converting from a Stumpy `Canvas` object to `RGBAImage` may lose quality if the original\nimage used 16 bit color channels (i.e. 16-bit PNG). Most image formats tend to use 8-bit color channels.\n\n## Development\n\nThis requires `libwebp`, `libspng`, and `libturbojpeg` to run. Then:\n\n```\n> make test\n```\n\nTo ensure all tests run and pass.\n\n## Contributing\n\n1. [Fork it](https://github.com/Vici37/cr-image/fork)\n2. Create your feature branch (`git checkout -b my-new-feature`)\n3. Commit your changes (`git commit -am 'Add some feature'`)\n4. Push to the branch (`git push origin my-new-feature`)\n5. Create a new Pull Request\n\n## Contributors\n\n- [Troy Sornson](https://github.com/Vici37) - creator and maintainer\n","program":{"html_id":"Crystal Image/toplevel","path":"toplevel.html","kind":"module","full_name":"Top Level Namespace","name":"Top Level Namespace","abstract":false,"locations":[],"repository_name":"Crystal Image","program":true,"enum":false,"alias":false,"const":false,"types":[{"html_id":"Crystal Image/CrImage","path":"CrImage.html","kind":"module","full_name":"CrImage","name":"CrImage","abstract":false,"locations":[{"filename":"src/cr-image/operation/bilinear_resize.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/bilinear_resize.cr#L14"},{"filename":"src/cr-image/region.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/region.cr#L1"},{"filename":"src/lib-formats/bindings/lib_jpeg_turbo.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/bindings/lib_jpeg_turbo.cr#L1"},{"filename":"src/lib-formats/bindings/lib_spng.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/bindings/lib_spng.cr#L1"},{"filename":"src/lib-formats/bindings/lib_webp.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/bindings/lib_webp.cr#L1"},{"filename":"src/stumpy.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/stumpy.cr#L28"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"types":[{"html_id":"Crystal Image/CrImage/ChannelType","path":"CrImage/ChannelType.html","kind":"enum","full_name":"CrImage::ChannelType","name":"ChannelType","abstract":false,"ancestors":[{"html_id":"Crystal Image/Enum","kind":"struct","full_name":"Enum","name":"Enum"},{"html_id":"Crystal Image/Comparable","kind":"module","full_name":"Comparable","name":"Comparable"},{"html_id":"Crystal Image/Value","kind":"struct","full_name":"Value","name":"Value"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/channel_type.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/channel_type.cr#L4"}],"repository_name":"Crystal Image","program":false,"enum":true,"alias":false,"const":false,"constants":[{"id":"Red","name":"Red","value":"0"},{"id":"Green","name":"Green","value":"1"},{"id":"Blue","name":"Blue","value":"2"},{"id":"Gray","name":"Gray","value":"3"},{"id":"Alpha","name":"Alpha","value":"4"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Enum representing different image channels supported by CrImage\n\nSee `RGBAImage#each_channel` and `GrayscaleImage#each_channel`","summary":"

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        ","constructors":[{"html_id":"new(red:UInt8,green:UInt8,blue:UInt8,alpha:UInt8=255)-class-method","name":"new","abstract":false,"args":[{"name":"red","external_name":"red","restriction":"UInt8"},{"name":"green","external_name":"green","restriction":"UInt8"},{"name":"blue","external_name":"blue","restriction":"UInt8"},{"name":"alpha","default_value":"255","external_name":"alpha","restriction":"UInt8"}],"args_string":"(red : UInt8, green : UInt8, blue : UInt8, alpha : UInt8 = 255)","args_html":"(red : UInt8, green : UInt8, blue : UInt8, alpha : UInt8 = 255)","location":{"filename":"src/cr-image/color.cr","line_number":8,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/color.cr#L8"},"def":{"name":"new","args":[{"name":"red","external_name":"red","restriction":"UInt8"},{"name":"green","external_name":"green","restriction":"UInt8"},{"name":"blue","external_name":"blue","restriction":"UInt8"},{"name":"alpha","default_value":"255","external_name":"alpha","restriction":"UInt8"}],"visibility":"Public","body":"_ = allocate\n_.initialize(red, green, blue, alpha)\nif _.responds_to?(:finalize)\n ::GC.add_finalizer(_)\nend\n_\n"}},{"html_id":"of(color:String):Color-class-method","name":"of","doc":"Parse color from a hex string:\n\n```\nColor.of(\"#1\") # same as \"#11\" => Color.new(17, 17, 17, 255)\nColor.of(\"#01\") # => Color.new(1, 1, 1, 255)\nColor.of(\"#123\") # same as \"#112233\" => Color.new(17, 34, 51, 255)\nColor.of(\"#1234\") # same as \"#11223344\" => Color.new(34, 51, 68, 17)\nColor.of(\"#010203\") # => Color.new(1, 2, 3, 255)\nColor.of(\"#01020304\") # => Color.new(2, 3, 4, 1)\n```","summary":"

        Parse color from a hex string:

        ","abstract":false,"args":[{"name":"color","external_name":"color","restriction":"String"}],"args_string":"(color : String) : Color","args_html":"(color : String) : Color","location":{"filename":"src/cr-image/color.cr","line_number":45,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/color.cr#L45"},"def":{"name":"of","args":[{"name":"color","external_name":"color","restriction":"String"}],"return_type":"Color","visibility":"Public","body":"if ((!(color.starts_with?(\"#\"))) || (!({2, 3, 4, 5, 7, 9}.includes?(color.size)))) || (color.match(/^#[^0-9a-f]/i))\n raise(\"Invalid hex color '#{color}': must start with '#' followed by 1, 2, 3, 4, 6, or 9 alphanumeric characters (0-9 or a-f)\")\nend\ncase color.size\nwhen 2\n gray = (color[1].to_i(16)).to_u8\n gray = (gray << 4) + gray\n self.new(gray, gray, gray)\nwhen 3\n gray = (color[1, 2].to_i(16)).to_u8\n self.new(gray, gray, gray)\nwhen 4\n red = (color[1].to_i(16)).to_u8\n green = (color[2].to_i(16)).to_u8\n blue = (color[3].to_i(16)).to_u8\n self.new((red << 4) + red, (green << 4) + green, (blue << 4) + blue)\nwhen 5\n alpha = (color[1].to_i(16)).to_u8\n red = (color[2].to_i(16)).to_u8\n green = (color[3].to_i(16)).to_u8\n blue = (color[4].to_i(16)).to_u8\n self.new((red << 4) + red, (green << 4) + green, (blue << 4) + blue, (alpha << 4) + alpha)\nwhen 7\n red = (color[1, 2].to_i(16)).to_u8\n green = (color[3, 2].to_i(16)).to_u8\n blue = (color[5, 2].to_i(16)).to_u8\n self.new(red, green, blue)\nelse\n alpha = (color[1, 2].to_i(16)).to_u8\n red = (color[3, 2].to_i(16)).to_u8\n green = (color[5, 2].to_i(16)).to_u8\n blue = (color[7, 2].to_i(16)).to_u8\n self.new(red, green, blue, alpha)\nend\n"}},{"html_id":"random:Color-class-method","name":"random","doc":"Generate a random color with full (255) opacity","summary":"

        Generate a random color with full (255) opacity

        ","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/color.cr#L12"},"def":{"name":"random","return_type":"Color","visibility":"Public","body":"r = Random.new\nnew(r.rand(UInt8), r.rand(UInt8), r.rand(UInt8), 255_u8)\n"}}],"instance_methods":[{"html_id":"==(other:Color):Bool-instance-method","name":"==","abstract":false,"args":[{"name":"other","external_name":"other","restriction":"Color"}],"args_string":"(other : Color) : Bool","args_html":"(other : Color) : Bool","location":{"filename":"src/cr-image/color.cr","line_number":89,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/color.cr#L89"},"def":{"name":"==","args":[{"name":"other","external_name":"other","restriction":"Color"}],"return_type":"Bool","visibility":"Public","body":"(((red == other.red) && (green == other.green)) && (blue == other.blue)) && (alpha == other.alpha)"}},{"html_id":"[](channel_type:ChannelType):UInt8-instance-method","name":"[]","doc":"Receive the UInt8 portion of this color corresponding to `channel_type`","summary":"

        Receive the UInt8 portion of this color corresponding to channel_type

        ","abstract":false,"args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(channel_type : ChannelType) : UInt8","args_html":"(channel_type : ChannelType) : UInt8","location":{"filename":"src/cr-image/color.cr","line_number":25,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/color.cr#L25"},"def":{"name":"[]","args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"return_type":"UInt8","visibility":"Public","body":"case channel_type\nin ChannelType::Red\n red\nin ChannelType::Green\n green\nin ChannelType::Blue\n blue\nin ChannelType::Alpha\n alpha\nin ChannelType::Gray\n gray\nend"}},{"html_id":"alpha:UInt8-instance-method","name":"alpha","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/color.cr#L6"},"def":{"name":"alpha","visibility":"Public","body":"@alpha"}},{"html_id":"blue:UInt8-instance-method","name":"blue","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/color.cr#L6"},"def":{"name":"blue","visibility":"Public","body":"@blue"}},{"html_id":"gray(red_multiplier:Float=0.299,green_multiplier:Float=0.587,blue_multiplier:Float=0.114):UInt8-instance-method","name":"gray","doc":"Convert this Color to a single UInt8 gray value","summary":"

        Convert this Color to a single UInt8 gray value

        ","abstract":false,"args":[{"name":"red_multiplier","default_value":"0.299","external_name":"red_multiplier","restriction":"Float"},{"name":"green_multiplier","default_value":"0.587","external_name":"green_multiplier","restriction":"Float"},{"name":"blue_multiplier","default_value":"0.114","external_name":"blue_multiplier","restriction":"Float"}],"args_string":"(red_multiplier : Float = 0.299, green_multiplier : Float = 0.587, blue_multiplier : Float = 0.114) : UInt8","args_html":"(red_multiplier : Float = 0.299, green_multiplier : Float = 0.587, blue_multiplier : Float = 0.114) : UInt8","location":{"filename":"src/cr-image/color.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/color.cr#L18"},"def":{"name":"gray","args":[{"name":"red_multiplier","default_value":"0.299","external_name":"red_multiplier","restriction":"Float"},{"name":"green_multiplier","default_value":"0.587","external_name":"green_multiplier","restriction":"Float"},{"name":"blue_multiplier","default_value":"0.114","external_name":"blue_multiplier","restriction":"Float"}],"return_type":"UInt8","visibility":"Public","body":"Math.min(255_u8, (((red * red_multiplier) + (blue * blue_multiplier)) + (green * green_multiplier)).to_u8)"}},{"html_id":"green:UInt8-instance-method","name":"green","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/color.cr#L6"},"def":{"name":"green","visibility":"Public","body":"@green"}},{"html_id":"red:UInt8-instance-method","name":"red","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/color.cr#L6"},"def":{"name":"red","visibility":"Public","body":"@red"}}]},{"html_id":"Crystal Image/CrImage/Exception","path":"CrImage/Exception.html","kind":"class","full_name":"CrImage::Exception","name":"Exception","abstract":false,"superclass":{"html_id":"Crystal Image/Exception","kind":"class","full_name":"Exception","name":"Exception"},"ancestors":[{"html_id":"Crystal Image/Exception","kind":"class","full_name":"Exception","name":"Exception"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/exception.cr","line_number":2,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/exception.cr#L2"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Exception class for any errors thrown by CrImage","summary":"

        Exception class for any errors thrown by CrImage

        ","constructors":[{"html_id":"new(message:String)-class-method","name":"new","abstract":false,"args":[{"name":"message","external_name":"message","restriction":"String"}],"args_string":"(message : String)","args_html":"(message : String)","location":{"filename":"src/cr-image/exception.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/exception.cr#L5"},"def":{"name":"new","args":[{"name":"message","external_name":"message","restriction":"String"}],"visibility":"Public","body":"_ = allocate\n_.initialize(message)\nif _.responds_to?(:finalize)\n ::GC.add_finalizer(_)\nend\n_\n"}},{"html_id":"new(error_code:Int32)-class-method","name":"new","abstract":false,"args":[{"name":"error_code","external_name":"error_code","restriction":"Int32"}],"args_string":"(error_code : Int32)","args_html":"(error_code : Int32)","location":{"filename":"src/cr-image/exception.cr","line_number":9,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/exception.cr#L9"},"def":{"name":"new","args":[{"name":"error_code","external_name":"error_code","restriction":"Int32"}],"visibility":"Public","body":"_ = allocate\n_.initialize(error_code)\nif _.responds_to?(:finalize)\n ::GC.add_finalizer(_)\nend\n_\n"}},{"html_id":"new(handle:LibJPEGTurbo::Handle)-class-method","name":"new","abstract":false,"args":[{"name":"handle","external_name":"handle","restriction":"LibJPEGTurbo::Handle"}],"args_string":"(handle : LibJPEGTurbo::Handle)","args_html":"(handle : LibJPEGTurbo::Handle)","location":{"filename":"src/cr-image/exception.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/exception.cr#L13"},"def":{"name":"new","args":[{"name":"handle","external_name":"handle","restriction":"LibJPEGTurbo::Handle"}],"visibility":"Public","body":"_ = allocate\n_.initialize(handle)\nif _.responds_to?(:finalize)\n ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"error_code:Int32|Nil-instance-method","name":"error_code","abstract":false,"location":{"filename":"src/cr-image/exception.cr","line_number":3,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/exception.cr#L3"},"def":{"name":"error_code","return_type":"Int32 | ::Nil","visibility":"Public","body":"@error_code"}}]},{"html_id":"Crystal Image/CrImage/Format","path":"CrImage/Format.html","kind":"module","full_name":"CrImage::Format","name":"Format","abstract":false,"locations":[{"filename":"src/cr-image/format/save.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/format/save.cr#L12"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"constants":[{"id":"SUPPORTED_FORMATS","name":"SUPPORTED_FORMATS","value":"[{extension: \".ppm\", method: \"ppm\"}, {extension: \".jpeg\", method: \"jpeg\"}, {extension: \".jpg\", method: \"jpeg\"}, {extension: \".png\", method: \"png\"}, {extension: \".webp\", method: \"webp\"}] of Nil"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Provides a convenience method for saving image files to the filesystem.\nCurrently supports:\n* PPM (`.ppm`)\n* WebP (`.webp`)\n* JPEG (`.jpeg`, `.jpg`)\n* PNG (`.png`)\n\n```\nimage.save(\"image.jpg\")\n```\nSee `Open` for a convenience method to read images from the filesystem","summary":"

        Provides a convenience method for saving image files to the filesystem.

        ","types":[{"html_id":"Crystal Image/CrImage/Format/JPEG","path":"CrImage/Format/JPEG.html","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG","abstract":false,"locations":[{"filename":"src/lib-formats/jpeg.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/jpeg.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to jpeg. Requires `libturbojpeg` to function.\n\n```\nimage = File.open(\"image.jpg\") { |file| CrImage::RGBAImage.from_jpeg(file) }\nFile.open(\"other_image.jpg\") { |file| image.to_jpeg(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.jpg\")\nimage.save(\"other_image.jpg\")\n```","summary":"

        Provides methods to read from and write to jpeg.

        ","instance_methods":[{"html_id":"to_jpeg(io:IO,quality:Int32=100):Nil-instance-method","name":"to_jpeg","doc":"Output the image as JPEG to `io`","summary":"

        Output the image as JPEG to io

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"args_string":"(io : IO, quality : Int32 = 100) : Nil","args_html":"(io : IO, quality : Int32 = 100) : Nil","location":{"filename":"src/lib-formats/jpeg.cr","line_number":74,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/jpeg.cr#L74"},"def":{"name":"to_jpeg","args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"return_type":"Nil","visibility":"Public","body":"handle = LibJPEGTurbo.init_compress\nimage_data = IO::Memory.new(size * 3)\nsize.times do |index|\n image_data.write_byte(red.unsafe_fetch(index))\n image_data.write_byte(green.unsafe_fetch(index))\n image_data.write_byte(blue.unsafe_fetch(index))\nend\nbuffer = Pointer(UInt8).null\ncheck_jpeg(handle, LibJPEGTurbo.compress2(handle, image_data.buffer, @width, 0, @height, LibJPEGTurbo::PixelFormat::RGB, pointerof(buffer), out size, LibJPEGTurbo::Subsampling::S444, quality, 0))\ncheck_jpeg(handle, LibJPEGTurbo.destroy(handle))\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibJPEGTurbo.free(buffer)\n"}}]},{"html_id":"Crystal Image/CrImage/Format/Open","path":"CrImage/Format/Open.html","kind":"module","full_name":"CrImage::Format::Open","name":"Open","abstract":false,"locations":[{"filename":"src/cr-image/format/open.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/format/open.cr#L12"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides a convenience method for opening up image files from the filesystem.\nCurrently supports:\n* PPM (`.ppm`)\n* WebP (`.webp`)\n* JPEG (`.jpeg`, `.jpg`)\n* PNG (`.png`)\n\n```\nimage = CrImage::RGBAImage.open(\"image.jpg\")\n```\nSee `Save` for a convenience method to write to the filesystem.","summary":"

        Provides a convenience method for opening up image files from the filesystem.

        ","instance_methods":[{"html_id":"open(filename:String):self-instance-method","name":"open","doc":"Reads this image from file using the provided filename.","summary":"

        Reads this image from file using the provided filename.

        ","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/open.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/format/open.cr#L14"},"def":{"name":"open","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"{% if true %}\n case filename\n {% for format in SUPPORTED_FORMATS %}\n when .ends_with?({{ format[:extension] }}) then File.open(filename) { |file| self.from_{{ format[:method].id }}(file) }\n {% end %}\n else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map do |__arg0|\n __arg0[:extension].id\nend.join(\", \")).id }}\"\n end\n {% end %}"}}]},{"html_id":"Crystal Image/CrImage/Format/PNG","path":"CrImage/Format/PNG.html","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG","abstract":false,"locations":[{"filename":"src/lib-formats/png.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/png.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to PNG. Requires `libspng` to function.\n\n```\nimage = File.open(\"image.png\") { |file| CrImage::RGBAImage.from_png(file) }\nFile.open(\"other_image.png\") { |file| image.to_png(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.png\")\nimage.save(\"other_image.png\")\n```","summary":"

        Provides methods to read from and write to PNG.

        ","instance_methods":[{"html_id":"to_png(io:IO):Nil-instance-method","name":"to_png","doc":"Output the image as PNG to `io`","summary":"

        Output the image as PNG to io

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/lib-formats/png.cr","line_number":72,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/png.cr#L72"},"def":{"name":"to_png","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"image_data = IO::Memory.new(size * 4)\nsize.times do |index|\n image_data.write_byte(red.unsafe_fetch(index))\n image_data.write_byte(green.unsafe_fetch(index))\n image_data.write_byte(blue.unsafe_fetch(index))\n image_data.write_byte(alpha.unsafe_fetch(index))\nend\nctx = LibSPNG.ctx_new(LibSPNG::CtxFlags::Encoder)\nif ctx\nelse\n raise(::CrImage::Exception.new(\"Failed to create a context\"))\nend\nLibSPNG.set_option(ctx, LibSPNG::Option::EncodeToBuffer, true)\nLibSPNG.set_png_buffer(ctx, image_data.buffer, image_data.size)\nihdr = LibSPNG::IHDR.new\nihdr.width = @width\nihdr.height = @height\nihdr.color_type = LibSPNG::ColorType::TrueColorAlpha\nihdr.bit_depth = 8\nLibSPNG.set_ihdr(ctx, pointerof(ihdr))\nerror = LibSPNG.encode_image(ctx, image_data.buffer, image_data.size, LibSPNG::Format::PNG, LibSPNG::EncodeFlags::Finalize)\ncheck_png(error)\nbuffer = LibSPNG.get_png_buffer(ctx, out size, pointerof(error))\nif ctx\nelse\n raise(::CrImage::Exception.new(\"Failed to get a buffer\"))\nend\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibC.free(buffer)\n"}}]},{"html_id":"Crystal Image/CrImage/Format/PPM","path":"CrImage/Format/PPM.html","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM","abstract":false,"locations":[{"filename":"src/cr-image/format/ppm.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/format/ppm.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to PPM.\n\n```\nimage = File.open(\"image.ppm\") { |file| CrImage::RGBAImage.from_ppm(file) }\nFile.open(\"other_image.ppm\") { |file| image.to_ppm(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.ppm\")\nimage.save(\"other_image.ppm\")\n```","summary":"

        Provides methods to read from and write to PPM.

        ","instance_methods":[{"html_id":"to_ppm(io:IO):Nil-instance-method","name":"to_ppm","doc":"Output this image to `io` using PPM image encoding","summary":"

        Output this image to io using PPM image encoding

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/cr-image/format/ppm.cr","line_number":56,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/format/ppm.cr#L56"},"def":{"name":"to_ppm","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"io << \"P6\\n\"\n(((io << @width) << \" \") << @height) << \"\\n\"\nio << \"255\\n\"\nsize.times do |index|\n io.write_byte(red.unsafe_fetch(index))\n io.write_byte(green.unsafe_fetch(index))\n io.write_byte(blue.unsafe_fetch(index))\nend\n"}}]},{"html_id":"Crystal Image/CrImage/Format/Save","path":"CrImage/Format/Save.html","kind":"module","full_name":"CrImage::Format::Save","name":"Save","abstract":false,"locations":[{"filename":"src/cr-image/format/save.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/format/save.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"instance_methods":[{"html_id":"save(filename:String):self-instance-method","name":"save","doc":"Write this image to file using the provided filename.\n\nThis method _will not_ create intermediate directory paths. This method will throw an\nerror if they don't exist.","summary":"

        Write this image to file using the provided filename.

        ","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/save.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/format/save.cr#L20"},"def":{"name":"save","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"File.open(filename, \"w\") do |file|\n {% if true %}\n case filename\n {% for format in SUPPORTED_FORMATS %}\n when .ends_with?({{ format[:extension] }}) then to_{{ format[:method].id }}(file)\n {% end %}\n else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map do |__arg0|\n __arg0[:extension].id\n end.join(\", \")).id }}\"\n end\n {% end %}\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Format/WebP","path":"CrImage/Format/WebP.html","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP","abstract":false,"locations":[{"filename":"src/lib-formats/webp.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/webp.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to WebP. Requires `libwebp` to function.\n\n```\nimage = File.open(\"image.webp\") { |file| CrImage::RGBAImage.from_webp(file) }\nFile.open(\"other_image.webp\") { |file| image.to_webp(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.webp\")\nimage.save(\"other_image.webp\")\n```","summary":"

        Provides methods to read from and write to WebP.

        ","instance_methods":[{"html_id":"to_webp(io:IO):Nil-instance-method","name":"to_webp","doc":"Write image to `io` using WebP encoding","summary":"

        Write image to io using WebP encoding

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/lib-formats/webp.cr","line_number":58,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/webp.cr#L58"},"def":{"name":"to_webp","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"image_data = String.build do |string|\n size.times do |index|\n string.write_byte(red.unsafe_fetch(index))\n string.write_byte(green.unsafe_fetch(index))\n string.write_byte(blue.unsafe_fetch(index))\n string.write_byte(alpha.unsafe_fetch(index))\n end\nend\nsize = LibWebP.encode_lossless_rgba(image_data, @width, @height, @width * 4, out buffer)\ncheck_webp(size)\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibWebP.free(buffer)\n"}}]}]},{"html_id":"Crystal Image/CrImage/GrayscaleImage","path":"CrImage/GrayscaleImage.html","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage","abstract":false,"superclass":{"html_id":"Crystal Image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},"ancestors":[{"html_id":"Crystal Image/CrImage/Format/WebP","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP"},{"html_id":"Crystal Image/CrImage/Format/PNG","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG"},{"html_id":"Crystal Image/CrImage/Format/JPEG","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG"},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"Crystal Image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"Crystal Image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"Crystal Image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"Crystal Image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"Crystal Image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"Crystal Image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"Crystal Image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"Crystal Image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/grayscale_image.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/grayscale_image.cr#L13"},{"filename":"src/jpeg.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/jpeg.cr#L4"},{"filename":"src/png.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/png.cr#L4"},{"filename":"src/stumpy.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/stumpy.cr#L38"},{"filename":"src/webp.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/webp.cr#L4"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/Format/JPEG","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG"},{"html_id":"Crystal Image/CrImage/Format/PNG","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG"},{"html_id":"Crystal Image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"Crystal Image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"Crystal Image/CrImage/Format/WebP","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP"},{"html_id":"Crystal Image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"Crystal Image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"Crystal Image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"Crystal Image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"Crystal Image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"}],"extended_modules":[{"html_id":"Crystal Image/CrImage/Format/Open","kind":"module","full_name":"CrImage::Format::Open","name":"Open"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"An image in Grayscale. These image types are the easiest to perform feature and information extraction from, where\nthere is only one channel to examine, and so has methods for constructing `Mask`s from (see `#threshold` below).\n\nAn `RGBAImage` would become a `GrayscaleImage` this way:\n```\nimage.to_gray\n```\n\n\"Woman\n\"Woman","summary":"

        An image in Grayscale.

        ","constructors":[{"html_id":"from_jpeg(image_data:Bytes):self-class-method","name":"from_jpeg","doc":"Read `image_data` as JPEG encoded bytes","summary":"

        Read image_data as JPEG encoded bytes

        ","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_jpeg","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"handle = LibJPEGTurbo.init_decompress\ncheck_jpeg(handle, LibJPEGTurbo.decompress_header3(handle, image_data, image_data.size, out width, out height, out _subsampling, out _colorspace))\nbuffer = Bytes.new((width * height) * 3, 0)\ncheck_jpeg(handle, LibJPEGTurbo.decompress2(handle, image_data, LibC::ULong.new(image_data.size), buffer, width, 0, height, LibJPEGTurbo::PixelFormat::RGB, 0))\ncheck_jpeg(handle, LibJPEGTurbo.destroy(handle))\nred = Array.new(width * height) do\n 0_u8\nend\ngreen = Array.new(width * height) do\n 0_u8\nend\nblue = Array.new(width * height) do\n 0_u8\nend\nalpha = Array.new(width * height) do\n 255_u8\nend\n(width * height).times do |index|\n red.unsafe_put(index, buffer[index * 3])\n green.unsafe_put(index, buffer[(index * 3) + 1])\n blue.unsafe_put(index, buffer[(index * 3) + 2])\nend\nnew(red, green, blue, alpha, width, height)\n"}},{"html_id":"from_jpeg(io:IO):self-class-method","name":"from_jpeg","doc":"Construct an Image from reading in bytes from `io`","summary":"

        Construct an Image from reading in bytes from io

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_jpeg","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_jpeg(io.getb_to_end)"}},{"html_id":"from_png(image_data:Bytes):self-class-method","name":"from_png","doc":"Read `image_data` and PNG encoded bytes","summary":"

        Read image_data and PNG encoded bytes

        ","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_png","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"ctx = LibSPNG.ctx_new(LibSPNG::CtxFlags::None)\nif ctx\nelse\n raise(::CrImage::Exception.new(\"Failed to create a context\"))\nend\nLibSPNG.set_png_buffer(ctx, image_data, image_data.size)\ncheck_png(LibSPNG.get_ihdr(ctx, out ihdr))\ncheck_png(LibSPNG.decoded_image_size(ctx, LibSPNG::Format::RGBA8, out image_size))\nimage = Bytes.new(image_size.to_i, 0_u8)\ncheck_png(LibSPNG.decode_image(ctx, image, image_size, LibSPNG::Format::RGBA8, LibSPNG::DecodeFlags::None))\nLibSPNG.ctx_free(ctx)\nsize = image_size // 4\nwidth = size // ihdr.height\nheight = ihdr.height\nred = Array.new(size) do\n 0_u8\nend\ngreen = Array.new(size) do\n 0_u8\nend\nblue = Array.new(size) do\n 0_u8\nend\nalpha = Array.new(size) do\n 0_u8\nend\nsize.times do |index|\n position = index * 4\n red.unsafe_put(index, image[position + 0])\n green.unsafe_put(index, image[position + 1])\n blue.unsafe_put(index, image[position + 2])\n alpha.unsafe_put(index, image[position + 3])\nend\nnew(red, green, blue, alpha, width.to_i, height.to_i)\n"}},{"html_id":"from_png(io:IO):self-class-method","name":"from_png","doc":"Construct an Image by reading bytes from `io`","summary":"

        Construct an Image by reading bytes from io

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_png","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_png(io.getb_to_end)"}},{"html_id":"from_ppm(image_data:Bytes):self-class-method","name":"from_ppm","doc":"Read `image_data` as PPM encoded bytes","summary":"

        Read image_data as PPM encoded bytes

        ","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_ppm","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"from_ppm(IO::Memory.new(image_data))"}},{"html_id":"from_ppm(io:IO):self-class-method","name":"from_ppm","doc":"Read bytes from `io` as PPM encoded","summary":"

        Read bytes from io as PPM encoded

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_ppm","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"_magic_number = io.gets(\"\\n\", chomp: true)\nwidth = (io.gets(\" \", chomp: true)).try(&.to_i)\nheight = (io.gets(\"\\n\", chomp: true)).try(&.to_i)\n_maximum_color_value = io.gets(\"\\n\", chomp: true)\nif width && height\n red = Array.new(width * height) do\n 0_u8\n end\n green = Array.new(width * height) do\n 0_u8\n end\n blue = Array.new(width * height) do\n 0_u8\n end\n alpha = Array.new(width * height) do\n 255_u8\n end\n (width * height).times do |index|\n red_byte = io.read_byte\n green_byte = io.read_byte\n blue_byte = io.read_byte\n if (red_byte && green_byte) && blue_byte\n red.unsafe_put(index, red_byte)\n green.unsafe_put(index, green_byte)\n blue.unsafe_put(index, blue_byte)\n else\n raise(\"The image ends prematurely\")\n end\n end\n new(red, green, blue, alpha, width, height)\nelse\n raise(\"The image doesn't have width or height\")\nend\n"}},{"html_id":"from_webp(image_data:Bytes):self-class-method","name":"from_webp","doc":"Read `image_data` as WebP encoded bytes","summary":"

        Read image_data as WebP encoded bytes

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        Read bytes from io as WebP encoded

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_webp","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_webp(io.getb_to_end)"}},{"html_id":"new(red:Array(UInt8),green:Array(UInt8),blue:Array(UInt8),alpha:Array(UInt8),width:Int32,height:Int32)-class-method","name":"new","doc":"Create a GrayscaleImage from a set of color channels (delegates to `RGBAImage#to_gray`)","summary":"

        Create a GrayscaleImage from a set of color channels (delegates to RGBAImage#to_gray)

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        Create a GrayscaleImage with only an Array(UInt8) (alpha channel initialized as 255 throughout)

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        Set the bits for row x and partial columns ys

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        Set the bits for partial rows xs and partial columns ys

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        Apply this mask to the provided image with Operation::MaskApply#apply

        ","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"}],"args_string":"(image : Image) : Image","args_html":"(image : Image) : Image","location":{"filename":"src/cr-image/mask.cr","line_number":247,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/mask.cr#L247"},"def":{"name":"apply","args":[{"name":"image","external_name":"image","restriction":"Image"}],"return_type":"Image","visibility":"Public","body":"image.apply(self)"}},{"html_id":"apply(image:Image,&block:Int32,Int32,UInt8,ChannelType->UInt8):Image-instance-method","name":"apply","doc":"Apply this mask to the provided image with `Operation::MaskApply#apply`","summary":"

        Apply this mask to the provided image with Operation::MaskApply#apply

        ","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"}],"args_string":"(image : Image, &block : Int32, Int32, UInt8, ChannelType -> UInt8) : Image","args_html":"(image : Image, &block : Int32, Int32, UInt8, ChannelType -> UInt8) : Image","location":{"filename":"src/cr-image/mask.cr","line_number":252,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/mask.cr#L252"},"def":{"name":"apply","args":[{"name":"image","external_name":"image","restriction":"Image"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(Int32, Int32, UInt8, ChannelType -> UInt8)"},"return_type":"Image","visibility":"Public","body":"image.apply(self, &block)"}},{"html_id":"at(index:Int32):Bool-instance-method","name":"at","doc":"Return the bit at `index`","summary":"

        Return the bit at index

        ","abstract":false,"args":[{"name":"index","external_name":"index","restriction":"Int32"}],"args_string":"(index : Int32) : Bool","args_html":"(index : Int32) : Bool","location":{"filename":"src/cr-image/mask.cr","line_number":124,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/mask.cr#L124"},"def":{"name":"at","args":[{"name":"index","external_name":"index","restriction":"Int32"}],"return_type":"Bool","visibility":"Public","body":"if index >= size\n raise(\"Index #{index} exceeds mask size #{@bits.size}\")\nend\n@bits[index]\n"}},{"html_id":"bits:BitArray-instance-method","name":"bits","abstract":false,"location":{"filename":"src/cr-image/mask.cr","line_number":41,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/mask.cr#L41"},"def":{"name":"bits","return_type":"BitArray","visibility":"Public","body":"@bits"}},{"html_id":"clone-instance-method","name":"clone","doc":"Create a new `Mask` from this one without modifying it","summary":"

        Create a new Mask from this one without modifying it

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        Return a new Mask that's a copy of this one with all bits inverted.

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        Invert all bits in this instance of Mask.

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        Returns the bounding box of the mask where all true bits are contained.

        ","abstract":false,"location":{"filename":"src/cr-image/mask.cr","line_number":274,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/mask.cr#L274"},"def":{"name":"region","return_type":"Region","visibility":"Public","body":"@region || (@region = calculate_region)"}},{"html_id":"segments(*,diagonal:Bool=true):Array(Mask)-instance-method","name":"segments","doc":"Return an array of `Mask`s, each one corresponding to an area of contiguous true bits (identified from flood fills).\n\nMay specify `diagonal: false` for only 4-way (up, down, left, right) flood fill instead of default 8-way.\nStarting with sample mask:\n```\nmask = CrImage::Mask.new(50, 50, false)\n\nmask[5..45, 5..45] = true\nmask[15..35, 15..35] = false\nmask[21..25, 21..25] = true\nmask[26..30, 26..30] = true\n```\n\n\"Black\n\nIts segments look like:\n```\nmask.segments.each_with_index do |segment, i|\n segment.to_gray.save(\"mask_8-way_segments_example_#{i}.jpg\")\nend\n```\nYields the images:\n\n\"Black\n\"Black\n\nUsing `diagonal: false` yields:\n```\nmask.segments(diagonal: false).each_with_index do |segment, i|\n segment.to_gray.save(\"mask_4-way_segments_example_#{i}.jpg\")\nend\n```\nYields the images:\n\n\"Black\n\"Black\n\"Black","summary":"

        Return an array of Masks, each one corresponding to an area of contiguous true bits (identified from flood fills).

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        Set the bit for coordinate x and y

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        How many bits are stored in this Mask

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        How many bits are stored in this Mask

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        Convert this Mask to a GrayscaleImage, with false bits becoming 0, and true bits becoming 255

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        Module for containing individual operations for Image classes.

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        Resize an image using a bilinear resizing algorithm.

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        Resizes image to new dimensions

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        Resizes image to new dimensions.

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        Blurs the image

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fill)"}},{"html_id":"draw_square(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/draw.cr#L16"},"def":{"name":"draw_square","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"clone.draw_square!(region, color, fill: fill)"}},{"html_id":"draw_square!(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/draw.cr#L28"},"def":{"name":"draw_square!","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":5,"return_type":"self","visibility":"Public","body":"if (x + box_width) > width\n raise(\"Box dimensions extend #{(x + box_width) - width} pixels beyond width of the image (#{width})\")\nend\nif (y + box_height) > height\n raise(\"Box dimensions extend #{(y + box_height) - height} pixels beyond height of the image (#{height})\")\nend\nx_i = x.to_i\ny_i = y.to_i\neach_channel do |channel, channel_type|\n channel[( (y_i * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n color[channel_type]\n end\n channel[((y_i + box_height) * width) + x_i, box_width] = Array(UInt8).new(box_width) do\n color[channel_type]\n end\n box_height.times do |i|\n if i == 0\n next\n end\n if fill\n channel[( ((y_i + i) * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n color[channel_type]\n end\n else\n channel.unsafe_put(((y_i + i) * width) + x_i, color[channel_type])\n channel.unsafe_put((((y_i + i) * width) + x_i) + box_width, color[channel_type])\n end\n end\nend\nself\n"}},{"html_id":"draw_square!(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":24,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/draw.cr#L24"},"def":{"name":"draw_square!","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"draw_square!(*region.to_tuple, color, fill: fill)"}}]},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","path":"CrImage/Operation/GaussianBlur.html","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/gaussian_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Applies a 3x3 Gaussian blur. Implementation derived from [here](https://blog.ivank.net/fastest-gaussian-blur.html)\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.gaussian_blur(1).save(\"gaussian_1_sample.jpg\")\nimage.gaussian_blur(5).save(\"gaussian_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"

        Applies a 3x3 Gaussian blur.

        ","instance_methods":[{"html_id":"gaussian_blur(sigma:Int32):self-instance-method","name":"gaussian_blur","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/gaussian_blur.cr#L14"},"def":{"name":"gaussian_blur","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.gaussian_blur!(sigma)"}},{"html_id":"gaussian_blur!(sigma:Int32):self-instance-method","name":"gaussian_blur!","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/gaussian_blur.cr#L18"},"def":{"name":"gaussian_blur!","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"n = 3\nw_ideal = Math.sqrt((((12 * sigma) * sigma) / n) + 1)\nw_l = w_ideal.floor.to_i\nif (w_l % 2) == 0\n w_l = w_l - 1\nend\nm_ideal = (((((12 * sigma) * sigma) - ((n * w_l) * w_l)) - ((4 * n) * w_l)) - (3 * n)) / ((-4 * w_l) - 4)\nm = m_ideal.round\nsizes = [] of Int32\nn.times do |i|\n sizes << (if i < m\n w_l\n else\n w_l + 2\n end)\nend\nbox_blur!(((sizes.unsafe_fetch(0)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(1)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(2)) - 1) // 2)\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","path":"CrImage/Operation/HistogramEqualize.html","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize","abstract":false,"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":19,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L19"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Provides methods for histogram and histogram equalization. Follows method outlined [here](https://www.sci.utah.edu/~acoste/uou/Image/project1/Arthur_COSTE_Project_1_report.html)\n\nIf an image is particularly dark or particularly bright with low contrast, the `Operation::Contrast#contrast` method will only\nmake the image darker or lighter. For images like these, equalizing the image along its histogram will produce better results.\n\n\"A\n\n```\nimage.contrast(10).save(\"contrast.jpg\")\nimage.histogram_equalize.save(\"equalized.jpg\")\n```\n\"Darker\n\"A\n\nThis method does not work well when a given method has a bimodal distribution of color pixels. For example:\n\n\"Woman\n\"Highly","summary":"

        Provides methods for histogram and histogram equalization.

        ","instance_methods":[{"html_id":"histogram(channel_type:ChannelType):Histogram-instance-method","name":"histogram","abstract":false,"args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(channel_type : ChannelType) : Histogram","args_html":"(channel_type : ChannelType) : Histogram","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":93,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L93"},"def":{"name":"histogram","args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"return_type":"Histogram","visibility":"Public","body":"Histogram.new(self, channel_type)"}},{"html_id":"histogram_equalize:self-instance-method","name":"histogram_equalize","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":97,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L97"},"def":{"name":"histogram_equalize","return_type":"self","visibility":"Public","body":"clone.histogram_equalize!"}},{"html_id":"histogram_equalize!:self-instance-method","name":"histogram_equalize!","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":101,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L101"},"def":{"name":"histogram_equalize!","return_type":"self","visibility":"Public","body":"each_channel do |channel, channel_type|\n if channel_type.alpha?\n next\n end\n remap = (histogram(channel_type)).equalize\n size.times do |i|\n channel.unsafe_put(i, remap[channel.unsafe_fetch(i)])\n end\nend\nself\n"}}],"types":[{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize/Histogram","path":"CrImage/Operation/HistogramEqualize/Histogram.html","kind":"class","full_name":"CrImage::Operation::HistogramEqualize::Histogram","name":"Histogram","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":21,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L21"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},"doc":"A histogram of an `Image` for a specific `ChannelType`","summary":"

        A histogram of an Image for a specific ChannelType

        ","constructors":[{"html_id":"new(image:Image,channel_type:ChannelType)-class-method","name":"new","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(image : Image, channel_type : ChannelType)","args_html":"(image : Image, channel_type : ChannelType)","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L22"},"def":{"name":"new","args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"visibility":"Public","body":"_ = allocate\n_.initialize(image, channel_type)\nif _.responds_to?(:finalize)\n ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"cdf:Hash(UInt8,Float64)-instance-method","name":"cdf","doc":"Get the cumulative distribution for the image's histogram","summary":"

        Get the cumulative distribution for the image's histogram

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":54,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L54"},"def":{"name":"cdf","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"total = 0_f64\n@cumulative_distribution_histogram || (@cumulative_distribution_histogram = normalize.map do |pixel, probability|\n original = total\n total = total + probability\n {pixel, original}\nend.to_h)\n"}},{"html_id":"counts:Hash(UInt8,Int32)-instance-method","name":"counts","doc":"Get the raw counts for a given pixel value (0-255) in the image","summary":"

        Get the raw counts for a given pixel value (0-255) in the image

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L28"},"def":{"name":"counts","return_type":"Hash(UInt8, Int32)","visibility":"Public","body":"@internal_hist || (@internal_hist = calculate_counts)"}},{"html_id":"equalize:Hash(UInt8,UInt8)-instance-method","name":"equalize","doc":"Remap the cumalitive distribution of pixels to get a new, more spread out pixel value","summary":"

        Remap the cumalitive distribution of pixels to get a new, more spread out pixel value

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":64,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L64"},"def":{"name":"equalize","return_type":"Hash(UInt8, UInt8)","visibility":"Public","body":"cdf.map do |pixel, cumalative|\n {pixel, ((cumalative * 255).clamp(0, 255)).to_u8}\nend.to_h"}},{"html_id":"normalize:Hash(UInt8,Float64)-instance-method","name":"normalize","doc":"Get pixel counts normalized - all values between 0.0 and 1.0","summary":"

        Get pixel counts normalized - all values between 0.0 and 1.0

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":45,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L45"},"def":{"name":"normalize","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"counts.map do |pixel, count|\n {pixel, count.to_f / @image.size}\nend.to_h"}}]}]},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","path":"CrImage/Operation/HorizontalBlur.html","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/horizontal_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the horizontal axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.horizontal_blur(1).save(\"horizontal_1_sample.jpg\")\nimage.horizontal_blur(5).save(\"horizontal_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"

        Blur an image along the horizontal axis

        ","instance_methods":[{"html_id":"horizontal_blur(value:Int32):self-instance-method","name":"horizontal_blur","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/horizontal_blur.cr#L14"},"def":{"name":"horizontal_blur","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.horizontal_blur!(value)"}},{"html_id":"horizontal_blur!(value:Int32):self-instance-method","name":"horizontal_blur!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/horizontal_blur.cr#L18"},"def":{"name":"horizontal_blur!","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((value + value) + 1)\neach_channel do |channel|\n @height.times do |y|\n c_index : Int32 = y * @width\n l_index : Int32 = c_index\n r_index : Int32 = c_index + value\n f_value : Int32 = (channel.unsafe_fetch(c_index)).to_i\n l_value : Int32 = (channel.unsafe_fetch((c_index + @width) - 1)).to_i\n c_value : Int32 = (value + 1) * f_value\n (0..(value - 1)).each do\n c_value = c_value + (channel.unsafe_fetch(c_index))\n end\n (0..value).each do\n c_value = c_value + ((channel.unsafe_fetch(r_index)).to_i - f_value)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n r_index = r_index + 1\n c_index = c_index + 1\n end\n ((value + 1)..((@width - value) - 1)).each do\n c_value = c_value + ((channel.unsafe_fetch(r_index)).to_i - (channel.unsafe_fetch(l_index)).to_i)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n r_index = r_index + 1\n l_index = l_index + 1\n c_index = c_index + 1\n end\n ((@width - value)..(@width - 1)).each do\n c_value = c_value + (l_value - (channel.unsafe_fetch(l_index)).to_i)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n l_index = l_index + 1\n c_index = c_index + 1\n end\n end\n (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","path":"CrImage/Operation/MaskApply.html","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply","abstract":false,"locations":[{"filename":"src/cr-image/operation/mask_apply.cr","line_number":27,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L27"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Apply a mask to an image\n\nTaking sample `image`:\n\n\"Woman\n\nAnd mask\n\n\"Black\n\n```\nmask = CrImage::Mask.new(image, false)\nmask[50..90, 65..75] = true\nmask.to_gray.save(\"apply_mask_mask.jpg\")\n\nimage.apply(mask).save(\"apply_mask.jpg\")\n\nimage.apply_color(mask, CrImage::Color.of(\"#00f\")).save(\"apply_mask_color.jpg\")\n\nimage.apply(mask) do |x, y, pixel, channel_type|\n Math.min(255, pixel + 50).to_u8 if channel_type.blue?\nend.save(\"apply_mask_block.jpg\")\n```\n\"Image\n\"Thin\n\"Thin","summary":"

        Apply a mask to an image

        ","instance_methods":[{"html_id":"apply(mask:Mask):self-instance-method","name":"apply","doc":"Black out all pixels but those found in the mask","summary":"

        Black out all pixels but those found in the mask

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":29,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L29"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"clone.apply!(mask)"}},{"html_id":"apply(mask:Mask,&block:Int32,Int32,UInt8,ChannelType->UInt8|Nil):self-instance-method","name":"apply","doc":"Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.\n\nDoes not change values not matched by the mask","summary":"

        Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":36,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L36"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(Int32, Int32, UInt8, ChannelType -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"clone.apply!(mask, &block)"}},{"html_id":"apply!(mask:Mask):self-instance-method","name":"apply!","doc":"TODO: add apply version that accepts 1+ ChannelType that the mask should apply to (i.e. make a background completely transparent, not just transparent black)","summary":"

        TODO add apply version that accepts 1+ ChannelType that the mask should apply to (i.e.

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":46,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L46"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel|\n channel.map_with_index! do |pixel, i|\n mask.at(i) ? pixel : 0_u8\n end\nend\nself\n"}},{"html_id":"apply!(mask:Mask,&block:Int32,Int32,UInt8,ChannelType->UInt8|Nil):self-instance-method","name":"apply!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":55,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L55"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(Int32, Int32, UInt8, ChannelType -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel, channel_type|\n channel.map_with_index! do |pixel, i|\n mask.at(i) ? (block.call(i % width, i // width, pixel, channel_type)) || pixel : pixel\n end\nend\nself\n"}},{"html_id":"apply_color(mask:Mask,color:Color):self-instance-method","name":"apply_color","doc":"Change the color of all pixels that match the mask","summary":"

        Change the color of all pixels that match the mask

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":41,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L41"},"def":{"name":"apply_color","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"clone.apply_color!(mask, color)"}},{"html_id":"apply_color!(mask:Mask,color:Color):self-instance-method","name":"apply_color!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":66,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L66"},"def":{"name":"apply_color!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"apply!(mask) do |_, _, _, channel_type|\n color[channel_type]\nend"}}]},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","path":"CrImage/Operation/VerticalBlur.html","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/vertical_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the vertical axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.vertical_blur(1).save(\"vertical_1_sample.jpg\")\nimage.vertical_blur(5).save(\"vertical_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"

        Blur an image along the vertical axis

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        Represents a rectangular area on an Image from its upper left corner #x and #y coordinates, and a #width and #height.

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        Return the {x, y} tuple of the center coordinates of this Region

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        Crop a provided Image with this region, using Operation::Crop#crop

        ","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"}],"args_string":"(image : Image) : Image","args_html":"(image : Image) : Image","location":{"filename":"src/cr-image/region.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/region.cr#L16"},"def":{"name":"crop","args":[{"name":"image","external_name":"image","restriction":"Image"}],"return_type":"Image","visibility":"Public","body":"image.crop(self)"}},{"html_id":"height:UInt16-instance-method","name":"height","abstract":false,"def":{"name":"height","return_type":"UInt16","visibility":"Public","body":"@height"}},{"html_id":"to_tuple:Tuple(Int32,Int32,Int32,Int32)-instance-method","name":"to_tuple","doc":"Return this `Region` as a `x`, `y`, `width`, and `height` tuple","summary":"

        Return this Region as a #x, #y, #width, and #height tuple

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This image type is likely the one read from and written to file (or `IO`).","summary":"

        An image with red, green, blue, and alpha color channels (i.e.

        ","constructors":[{"html_id":"from_jpeg(image_data:Bytes):self-class-method","name":"from_jpeg","doc":"Read `image_data` as JPEG encoded bytes","summary":"

        Read image_data as JPEG encoded bytes

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        Construct an Image from reading in bytes from io

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        Create a copy of this image

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        Create a GrayscaleImage from a set of color channels (delegates to RGBAImage#to_gray)

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        Create a GrayscaleImage with only an Array(UInt8) (alpha channel initialized as 255 throughout)

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        Return the Array(UInt8) corresponding to channel_type

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        Set the underlying Array(UInt8) of channel_type to the new channel.

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        Return #alpha channel

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        Return the "#blue" channel (returns #gray)

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        Create a new GrayscaleImage as a copy of this one

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        Run provided block with the ChannelType::Gray and ChannelType::Alpha channels and channel types.

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        Return the "#green" channel (returns #gray)

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        Height of image

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        Invert grayscale pixels (replace each pixel will 255 - p for all p in @gray).

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        Invert grayscale pixels (replace each pixel will 255 - p for all p in @gray).

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        Construct a Mask from this GrayscaleImage using the passed in block to determine if a given pixel should be true or not

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        Return the "#red" channel (returns #gray)

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        Return the number of pixels this image contains

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        Construct a simple threshold Mask containing all pixels with a UInt8 value greater than #threshold Given sample image:

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        Returns self

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        Convert this GrayscaleImage to an RGBAImage.

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        Width of image

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        Common base class for GrayscaleImage and RGBAImage.

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        Return the alpha channel

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        Return the blue channel

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        Apply this mask to the provided image with Operation::MaskApply#apply

        ","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"}],"args_string":"(image : Image) : Image","args_html":"(image : Image) : Image","location":{"filename":"src/cr-image/mask.cr","line_number":247,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/mask.cr#L247"},"def":{"name":"apply","args":[{"name":"image","external_name":"image","restriction":"Image"}],"return_type":"Image","visibility":"Public","body":"image.apply(self)"}},{"html_id":"apply(image:Image,&block:Int32,Int32,UInt8,ChannelType->UInt8):Image-instance-method","name":"apply","doc":"Apply this mask to the provided image with `Operation::MaskApply#apply`","summary":"

        Apply this mask to the provided image with Operation::MaskApply#apply

        ","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"}],"args_string":"(image : Image, &block : Int32, Int32, UInt8, ChannelType -> UInt8) : Image","args_html":"(image : Image, &block : Int32, Int32, UInt8, ChannelType -> UInt8) : Image","location":{"filename":"src/cr-image/mask.cr","line_number":252,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/mask.cr#L252"},"def":{"name":"apply","args":[{"name":"image","external_name":"image","restriction":"Image"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(Int32, Int32, UInt8, ChannelType -> UInt8)"},"return_type":"Image","visibility":"Public","body":"image.apply(self, &block)"}},{"html_id":"at(index:Int32):Bool-instance-method","name":"at","doc":"Return the bit at `index`","summary":"

        Return the bit at index

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        Create a new Mask from this one without modifying it

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        Return a new Mask that's a copy of this one with all bits inverted.

        ","abstract":false,"location":{"filename":"src/cr-image/mask.cr","line_number":117,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/mask.cr#L117"},"def":{"name":"invert","visibility":"Public","body":"new_bits = @bits.dup\nnew_bits.invert\nMask.new(width, new_bits)\n"}},{"html_id":"invert!-instance-method","name":"invert!","doc":"Invert all bits in this instance of `Mask`. Modifies self.\n\n\"Black\n\nBecomes\n\n\"White","summary":"

        Invert all bits in this instance of Mask.

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        Returns the bounding box of the mask where all true bits are contained.

        ","abstract":false,"location":{"filename":"src/cr-image/mask.cr","line_number":274,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/mask.cr#L274"},"def":{"name":"region","return_type":"Region","visibility":"Public","body":"@region || (@region = calculate_region)"}},{"html_id":"segments(*,diagonal:Bool=true):Array(Mask)-instance-method","name":"segments","doc":"Return an array of `Mask`s, each one corresponding to an area of contiguous true bits (identified from flood fills).\n\nMay specify `diagonal: false` for only 4-way (up, down, left, right) flood fill instead of default 8-way.\nStarting with sample mask:\n```\nmask = CrImage::Mask.new(50, 50, false)\n\nmask[5..45, 5..45] = true\nmask[15..35, 15..35] = false\nmask[21..25, 21..25] = true\nmask[26..30, 26..30] = true\n```\n\n\"Black\n\nIts segments look like:\n```\nmask.segments.each_with_index do |segment, i|\n segment.to_gray.save(\"mask_8-way_segments_example_#{i}.jpg\")\nend\n```\nYields the images:\n\n\"Black\n\"Black\n\nUsing `diagonal: false` yields:\n```\nmask.segments(diagonal: false).each_with_index do |segment, i|\n segment.to_gray.save(\"mask_4-way_segments_example_#{i}.jpg\")\nend\n```\nYields the images:\n\n\"Black\n\"Black\n\"Black","summary":"

        Return an array of Masks, each one corresponding to an area of contiguous true bits (identified from flood fills).

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        Set the bit for coordinate x and y

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        How many bits are stored in this Mask

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        How many bits are stored in this Mask

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        Convert this Mask to a GrayscaleImage, with false bits becoming 0, and true bits becoming 255

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        Module for containing individual operations for Image classes.

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        Resize an image using a bilinear resizing algorithm.

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        Resizes image to new dimensions

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        Resizes image to new dimensions.

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        Blurs the image

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fill)"}},{"html_id":"draw_square(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : 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fill)"}},{"html_id":"draw_square!(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/draw.cr#L28"},"def":{"name":"draw_square!","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":5,"return_type":"self","visibility":"Public","body":"if (x + box_width) > width\n raise(\"Box dimensions extend #{(x + box_width) - width} pixels beyond width of the image (#{width})\")\nend\nif (y + box_height) > height\n raise(\"Box dimensions extend #{(y + box_height) - height} pixels beyond height of the image (#{height})\")\nend\nx_i = x.to_i\ny_i = y.to_i\neach_channel do |channel, channel_type|\n channel[( (y_i * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n color[channel_type]\n end\n channel[((y_i + box_height) * width) + x_i, box_width] = Array(UInt8).new(box_width) do\n color[channel_type]\n end\n box_height.times do |i|\n if i == 0\n next\n end\n if fill\n channel[( ((y_i + i) * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n color[channel_type]\n end\n else\n channel.unsafe_put(((y_i + i) * width) + x_i, color[channel_type])\n channel.unsafe_put((((y_i + i) * width) + x_i) + box_width, color[channel_type])\n end\n end\nend\nself\n"}},{"html_id":"draw_square!(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":24,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/draw.cr#L24"},"def":{"name":"draw_square!","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"draw_square!(*region.to_tuple, color, fill: fill)"}}]},{"html_id":"cr-image/CrImage/Operation/GaussianBlur","path":"CrImage/Operation/GaussianBlur.html","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/gaussian_blur.cr#L13"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"cr-image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"cr-image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"cr-image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Applies a 3x3 Gaussian blur. Implementation derived from [here](https://blog.ivank.net/fastest-gaussian-blur.html)\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.gaussian_blur(1).save(\"gaussian_1_sample.jpg\")\nimage.gaussian_blur(5).save(\"gaussian_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"

        Applies a 3x3 Gaussian blur.

        ","instance_methods":[{"html_id":"gaussian_blur(sigma:Int32):self-instance-method","name":"gaussian_blur","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/gaussian_blur.cr#L14"},"def":{"name":"gaussian_blur","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.gaussian_blur!(sigma)"}},{"html_id":"gaussian_blur!(sigma:Int32):self-instance-method","name":"gaussian_blur!","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/gaussian_blur.cr#L18"},"def":{"name":"gaussian_blur!","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"n = 3\nw_ideal = Math.sqrt((((12 * sigma) * sigma) / n) + 1)\nw_l = w_ideal.floor.to_i\nif (w_l % 2) == 0\n w_l = w_l - 1\nend\nm_ideal = (((((12 * sigma) * sigma) - ((n * w_l) * w_l)) - ((4 * n) * w_l)) - (3 * n)) / ((-4 * w_l) - 4)\nm = m_ideal.round\nsizes = [] of Int32\nn.times do |i|\n sizes << (if i < m\n w_l\n else\n w_l + 2\n end)\nend\nbox_blur!(((sizes.unsafe_fetch(0)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(1)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(2)) - 1) // 2)\nself\n"}}]},{"html_id":"cr-image/CrImage/Operation/HistogramEqualize","path":"CrImage/Operation/HistogramEqualize.html","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize","abstract":false,"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":19,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L19"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"cr-image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"cr-image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"cr-image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Provides methods for histogram and histogram equalization. Follows method outlined [here](https://www.sci.utah.edu/~acoste/uou/Image/project1/Arthur_COSTE_Project_1_report.html)\n\nIf an image is particularly dark or particularly bright with low contrast, the `Operation::Contrast#contrast` method will only\nmake the image darker or lighter. For images like these, equalizing the image along its histogram will produce better results.\n\n\"A\n\n```\nimage.contrast(10).save(\"contrast.jpg\")\nimage.histogram_equalize.save(\"equalized.jpg\")\n```\n\"Darker\n\"A\n\nThis method does not work well when a given method has a bimodal distribution of color pixels. For example:\n\n\"Woman\n\"Highly","summary":"

        Provides methods for histogram and histogram equalization.

        ","instance_methods":[{"html_id":"histogram(channel_type:ChannelType):Histogram-instance-method","name":"histogram","abstract":false,"args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(channel_type : ChannelType) : Histogram","args_html":"(channel_type : ChannelType) : Histogram","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":93,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L93"},"def":{"name":"histogram","args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"return_type":"Histogram","visibility":"Public","body":"Histogram.new(self, channel_type)"}},{"html_id":"histogram_equalize:self-instance-method","name":"histogram_equalize","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":97,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L97"},"def":{"name":"histogram_equalize","return_type":"self","visibility":"Public","body":"clone.histogram_equalize!"}},{"html_id":"histogram_equalize!:self-instance-method","name":"histogram_equalize!","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":101,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L101"},"def":{"name":"histogram_equalize!","return_type":"self","visibility":"Public","body":"each_channel do |channel, channel_type|\n if channel_type.alpha?\n next\n end\n remap = (histogram(channel_type)).equalize\n size.times do |i|\n channel.unsafe_put(i, remap[channel.unsafe_fetch(i)])\n end\nend\nself\n"}}],"types":[{"html_id":"cr-image/CrImage/Operation/HistogramEqualize/Histogram","path":"CrImage/Operation/HistogramEqualize/Histogram.html","kind":"class","full_name":"CrImage::Operation::HistogramEqualize::Histogram","name":"Histogram","abstract":false,"superclass":{"html_id":"cr-image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"cr-image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"cr-image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":21,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L21"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"cr-image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},"doc":"A histogram of an `Image` for a specific `ChannelType`","summary":"

        A histogram of an Image for a specific ChannelType

        ","constructors":[{"html_id":"new(image:Image,channel_type:ChannelType)-class-method","name":"new","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(image : Image, channel_type : ChannelType)","args_html":"(image : Image, channel_type : ChannelType)","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L22"},"def":{"name":"new","args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"visibility":"Public","body":"_ = allocate\n_.initialize(image, channel_type)\nif _.responds_to?(:finalize)\n ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"cdf:Hash(UInt8,Float64)-instance-method","name":"cdf","doc":"Get the cumulative distribution for the image's histogram","summary":"

        Get the cumulative distribution for the image's histogram

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":54,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L54"},"def":{"name":"cdf","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"total = 0_f64\n@cumulative_distribution_histogram || (@cumulative_distribution_histogram = normalize.map do |pixel, probability|\n original = total\n total = total + probability\n {pixel, original}\nend.to_h)\n"}},{"html_id":"counts:Hash(UInt8,Int32)-instance-method","name":"counts","doc":"Get the raw counts for a given pixel value (0-255) in the image","summary":"

        Get the raw counts for a given pixel value (0-255) in the image

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L28"},"def":{"name":"counts","return_type":"Hash(UInt8, Int32)","visibility":"Public","body":"@internal_hist || (@internal_hist = calculate_counts)"}},{"html_id":"equalize:Hash(UInt8,UInt8)-instance-method","name":"equalize","doc":"Remap the cumalitive distribution of pixels to get a new, more spread out pixel value","summary":"

        Remap the cumalitive distribution of pixels to get a new, more spread out pixel value

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":64,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L64"},"def":{"name":"equalize","return_type":"Hash(UInt8, UInt8)","visibility":"Public","body":"cdf.map do |pixel, cumalative|\n {pixel, ((cumalative * 255).clamp(0, 255)).to_u8}\nend.to_h"}},{"html_id":"normalize:Hash(UInt8,Float64)-instance-method","name":"normalize","doc":"Get pixel counts normalized - all values between 0.0 and 1.0","summary":"

        Get pixel counts normalized - all values between 0.0 and 1.0

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":45,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/histogram.cr#L45"},"def":{"name":"normalize","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"counts.map do |pixel, count|\n {pixel, count.to_f / @image.size}\nend.to_h"}}]}]},{"html_id":"cr-image/CrImage/Operation/HorizontalBlur","path":"CrImage/Operation/HorizontalBlur.html","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/horizontal_blur.cr#L13"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"cr-image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"cr-image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"cr-image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the horizontal axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.horizontal_blur(1).save(\"horizontal_1_sample.jpg\")\nimage.horizontal_blur(5).save(\"horizontal_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"

        Blur an image along the horizontal axis

        ","instance_methods":[{"html_id":"horizontal_blur(value:Int32):self-instance-method","name":"horizontal_blur","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/horizontal_blur.cr#L14"},"def":{"name":"horizontal_blur","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.horizontal_blur!(value)"}},{"html_id":"horizontal_blur!(value:Int32):self-instance-method","name":"horizontal_blur!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/horizontal_blur.cr#L18"},"def":{"name":"horizontal_blur!","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((value + value) + 1)\neach_channel do |channel|\n @height.times do |y|\n c_index : Int32 = y * @width\n l_index : Int32 = c_index\n r_index : Int32 = c_index + value\n f_value : Int32 = (channel.unsafe_fetch(c_index)).to_i\n l_value : Int32 = (channel.unsafe_fetch((c_index + @width) - 1)).to_i\n c_value : Int32 = (value + 1) * f_value\n (0..(value - 1)).each do\n c_value = c_value + (channel.unsafe_fetch(c_index))\n end\n (0..value).each do\n c_value = c_value + ((channel.unsafe_fetch(r_index)).to_i - f_value)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n r_index = r_index + 1\n c_index = c_index + 1\n end\n ((value + 1)..((@width - value) - 1)).each do\n c_value = c_value + ((channel.unsafe_fetch(r_index)).to_i - (channel.unsafe_fetch(l_index)).to_i)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n r_index = r_index + 1\n l_index = l_index + 1\n c_index = c_index + 1\n end\n ((@width - value)..(@width - 1)).each do\n c_value = c_value + (l_value - (channel.unsafe_fetch(l_index)).to_i)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n l_index = l_index + 1\n c_index = c_index + 1\n end\n end\n (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]},{"html_id":"cr-image/CrImage/Operation/MaskApply","path":"CrImage/Operation/MaskApply.html","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply","abstract":false,"locations":[{"filename":"src/cr-image/operation/mask_apply.cr","line_number":27,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/mask_apply.cr#L27"}],"repository_name":"cr-image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"cr-image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"cr-image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"cr-image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Apply a mask to an image\n\nTaking sample `image`:\n\n\"Woman\n\nAnd mask\n\n\"Black\n\n```\nmask = CrImage::Mask.new(image, false)\nmask[50..90, 65..75] = true\nmask.to_gray.save(\"apply_mask_mask.jpg\")\n\nimage.apply(mask).save(\"apply_mask.jpg\")\n\nimage.apply_color(mask, CrImage::Color.of(\"#00f\")).save(\"apply_mask_color.jpg\")\n\nimage.apply(mask) do |x, y, pixel, channel_type|\n Math.min(255, pixel + 50).to_u8 if channel_type.blue?\nend.save(\"apply_mask_block.jpg\")\n```\n\"Image\n\"Thin\n\"Thin","summary":"

        Apply a mask to an image

        ","instance_methods":[{"html_id":"apply(mask:Mask):self-instance-method","name":"apply","doc":"Black out all pixels but those found in the mask","summary":"

        Black out all pixels but those found in the mask

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":29,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/mask_apply.cr#L29"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"clone.apply!(mask)"}},{"html_id":"apply(mask:Mask,&block:Int32,Int32,UInt8,ChannelType->UInt8|Nil):self-instance-method","name":"apply","doc":"Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.\n\nDoes not change values not matched by the mask","summary":"

        Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":36,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/mask_apply.cr#L36"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(Int32, Int32, UInt8, ChannelType -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"clone.apply!(mask, &block)"}},{"html_id":"apply!(mask:Mask):self-instance-method","name":"apply!","doc":"TODO: add apply version that accepts 1+ ChannelType that the mask should apply to (i.e. make a background completely transparent, not just transparent black)","summary":"

        TODO add apply version that accepts 1+ ChannelType that the mask should apply to (i.e.

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":46,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/mask_apply.cr#L46"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel|\n channel.map_with_index! do |pixel, i|\n mask.at(i) ? pixel : 0_u8\n end\nend\nself\n"}},{"html_id":"apply!(mask:Mask,&block:Int32,Int32,UInt8,ChannelType->UInt8|Nil):self-instance-method","name":"apply!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":55,"url":"https://github.com/Vici37/cr-image/blob/058a55cab939a7442a43c0b19c5a129e0ed5c02a/src/cr-image/operation/mask_apply.cr#L55"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(Int32, Int32, UInt8, ChannelType -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel, channel_type|\n channel.map_with_index! do |pixel, i|\n mask.at(i) ? (block.call(i % width, i // width, pixel, channel_type)) || pixel : pixel\n end\nend\nself\n"}},{"html_id":"apply_color(mask:Mask,color:Color):self-instance-method","name":"apply_color","doc":"Change the color of all pixels that match the mask","summary":"

        Change the color of all pixels that match the mask

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        Blur an image along the vertical axis

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        Crop a provided Image with this region, using Operation::Crop#crop

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        An image with red, green, blue, and alpha color channels (i.e.

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        Read bytes from io as PPM encoded

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        Return the alpha channel

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        Create a copy of this image

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        Run provided block with the ChannelType::Red, ChannelType::Green, ChannelType::Blue, and ChannelType::Alpha channels.

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        Return the green channel

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        Height of image

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        Return the number of pixels in this image

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        Crystal Image (Processing)

        \n\nThis shard aims to provide feature rich image processing abilities, both for the purpose of\nimage manipulation as well as feature / information extraction from those images.\n\nThe code here takes imense inspiration from [Pluto](https://github.com/phenopolis/pluto) and [Stumpy](https://github.com/stumpycr/stumpy_core), with\nan eventual goal to be able to convert between images of this and those libraries.\n\nAll sample images used are from [Unsplash](https://unsplash.com/).\n\n## Installation\n\n1. Add the dependency to your `shard.yml`:\n\n ```yaml\n dependencies:\n cr-image:\n github: vici37/cr-image\n ```\n\n2. Run `shards install`\n\n## Usage\n\nCrImage supports the formats:\n* PPM\n* JPEG (requires `libturbojpeg`)\n* PNG (requirens `libspng`)\n* WebP (requires `libwebp`)\n\nFor the formats that require a linked library, they must be `require`d explicitly:\n\n```crystal\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\nrequire \"cr-image/png\"\nrequire \"cr-image/webp\"\n\n# Or, alternatively\nrequire \"cr-image/all_formats\"\n```\n\n### Example\n\nAssuming an image `moon.jpg` already exists\n\n\"Picture\n\n```crystal\nrequire \"cr-image\"\n\nimage = CrImage::RGBAImage.open(\"moon.jpg\")\n\n# create a mask identifying all pixels with light (i.e. the moon)\nmoon_mask = image\n .to_gray\n .threshold(8) # pixels are UInt8, with 0 as black and 255 as white\n\n# Crop out the moon from the image, and save it to a new file\nimage.crop(\n moon_mask.region # smallest area that encompasses all true bits in mask\n).save(\"moon_cropped.jpg\")\n\n```\n\nYields this image:\n\n\"Cropped\n\n[See documentation](http://troy.sornson.io/cr-image/) for more examples.\n\n### (Pluto)[https://github.com/phenopolis/pluto] and (Stumpy)[https://github.com/stumpycr/stumpy_core] Conversion\n\nIf your library or application already uses Pluto or Stumpy and you want to use\nsome of the functionality of this library, CrImage also provides some optional\nconversion methods:\n\n```crystal\nrequire \"cr-image/pluto\"\npluto_image # => Pluto::ImageRGBA\npluto_image_rgba.to_crimage # => CrImage::RGBAImage\n\ncr_image # => CrImage::RGBAImage\ncr_image.to_pluto # => Pluto::ImageRGBA\n```\n\n```crystal\nrequire \"cr-image/stumpy\"\nstumpy_canvas # => StumpyCore::Canvas\nstumpy_canvas.to_crimage # => CrImage::RGBAImage\n\ncr_image # => CrImage::RGBAImage\ncr_image.to_stumpy # => StumpyCore::Canvas\n```\n\n*NOTE:* Stumpy uses `UInt16` for its underlying raw image storage per channel per pixel, while Pluto and\nCrImage uses `UInt8`. Converting from a Stumpy `Canvas` object to `RGBAImage` may lose quality if the original\nimage used 16 bit color channels (i.e. 16-bit PNG). Most image formats tend to use 8-bit color channels.\n\n## Development\n\nThis requires `libwebp`, `libspng`, and `libturbojpeg` to run. Then:\n\n```\n> make test\n```\n\nTo ensure all tests run and pass.\n\n## Contributing\n\n1. [Fork it](https://github.com/Vici37/cr-image/fork)\n2. Create your feature branch (`git checkout -b my-new-feature`)\n3. Commit your changes (`git commit -am 'Add some feature'`)\n4. Push to the branch (`git push origin my-new-feature`)\n5. Create a new Pull Request\n\n## Contributors\n\n- [Troy Sornson](https://github.com/Vici37) - creator and maintainer\n","program":{"html_id":"Crystal Image/toplevel","path":"toplevel.html","kind":"module","full_name":"Top Level Namespace","name":"Top Level Namespace","abstract":false,"locations":[],"repository_name":"Crystal Image","program":true,"enum":false,"alias":false,"const":false,"types":[{"html_id":"Crystal Image/CrImage","path":"CrImage.html","kind":"module","full_name":"CrImage","name":"CrImage","abstract":false,"locations":[{"filename":"src/cr-image/operation/bilinear_resize.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/bilinear_resize.cr#L14"},{"filename":"src/cr-image/region.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/region.cr#L1"},{"filename":"src/lib-formats/bindings/lib_jpeg_turbo.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/bindings/lib_jpeg_turbo.cr#L1"},{"filename":"src/lib-formats/bindings/lib_spng.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/bindings/lib_spng.cr#L1"},{"filename":"src/lib-formats/bindings/lib_webp.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/bindings/lib_webp.cr#L1"},{"filename":"src/stumpy.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/stumpy.cr#L28"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"types":[{"html_id":"Crystal Image/CrImage/ChannelType","path":"CrImage/ChannelType.html","kind":"enum","full_name":"CrImage::ChannelType","name":"ChannelType","abstract":false,"ancestors":[{"html_id":"Crystal Image/Enum","kind":"struct","full_name":"Enum","name":"Enum"},{"html_id":"Crystal Image/Comparable","kind":"module","full_name":"Comparable","name":"Comparable"},{"html_id":"Crystal Image/Value","kind":"struct","full_name":"Value","name":"Value"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/channel_type.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/channel_type.cr#L4"}],"repository_name":"Crystal Image","program":false,"enum":true,"alias":false,"const":false,"constants":[{"id":"Red","name":"Red","value":"0"},{"id":"Green","name":"Green","value":"1"},{"id":"Blue","name":"Blue","value":"2"},{"id":"Gray","name":"Gray","value":"3"},{"id":"Alpha","name":"Alpha","value":"4"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Enum representing different image channels supported by CrImage\n\nSee `RGBAImage#each_channel` and `GrayscaleImage#each_channel`","summary":"

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        Parse color from a hex string:

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        Generate a random color with full (255) opacity

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        Receive the UInt8 portion of this color corresponding to channel_type

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        Convert this Color to a single UInt8 gray value

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        Exception class for any errors thrown by CrImage

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        Provides a convenience method for saving image files to the filesystem.

        ","types":[{"html_id":"Crystal Image/CrImage/Format/JPEG","path":"CrImage/Format/JPEG.html","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG","abstract":false,"locations":[{"filename":"src/lib-formats/jpeg.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/jpeg.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to jpeg. Requires `libturbojpeg` to function.\n\n```\nimage = File.open(\"image.jpg\") { |file| CrImage::RGBAImage.from_jpeg(file) }\nFile.open(\"other_image.jpg\") { |file| image.to_jpeg(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.jpg\")\nimage.save(\"other_image.jpg\")\n```","summary":"

        Provides methods to read from and write to jpeg.

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        Output the image as JPEG to io

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        Provides a convenience method for opening up image files from the filesystem.

        ","instance_methods":[{"html_id":"open(filename:String):self-instance-method","name":"open","doc":"Reads this image from file using the provided filename.","summary":"

        Reads this image from file using the provided filename.

        ","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/open.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/format/open.cr#L14"},"def":{"name":"open","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"{% if true %}\n case filename\n {% for format in SUPPORTED_FORMATS %}\n when .ends_with?({{ format[:extension] }}) then File.open(filename) { |file| self.from_{{ format[:method].id }}(file) }\n {% end %}\n else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map do |__arg0|\n __arg0[:extension].id\nend.join(\", \")).id }}\"\n end\n {% end %}"}}]},{"html_id":"Crystal Image/CrImage/Format/PNG","path":"CrImage/Format/PNG.html","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG","abstract":false,"locations":[{"filename":"src/lib-formats/png.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/png.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to PNG. Requires `libspng` to function.\n\n```\nimage = File.open(\"image.png\") { |file| CrImage::RGBAImage.from_png(file) }\nFile.open(\"other_image.png\") { |file| image.to_png(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.png\")\nimage.save(\"other_image.png\")\n```","summary":"

        Provides methods to read from and write to PNG.

        ","instance_methods":[{"html_id":"to_png(io:IO):Nil-instance-method","name":"to_png","doc":"Output the image as PNG to `io`","summary":"

        Output the image as PNG to io

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/lib-formats/png.cr","line_number":72,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/png.cr#L72"},"def":{"name":"to_png","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"image_data = IO::Memory.new(size * 4)\nsize.times do |index|\n image_data.write_byte(red.unsafe_fetch(index))\n image_data.write_byte(green.unsafe_fetch(index))\n image_data.write_byte(blue.unsafe_fetch(index))\n image_data.write_byte(alpha.unsafe_fetch(index))\nend\nctx = LibSPNG.ctx_new(LibSPNG::CtxFlags::Encoder)\nif ctx\nelse\n raise(::CrImage::Exception.new(\"Failed to create a context\"))\nend\nLibSPNG.set_option(ctx, LibSPNG::Option::EncodeToBuffer, true)\nLibSPNG.set_png_buffer(ctx, image_data.buffer, image_data.size)\nihdr = LibSPNG::IHDR.new\nihdr.width = @width\nihdr.height = @height\nihdr.color_type = LibSPNG::ColorType::TrueColorAlpha\nihdr.bit_depth = 8\nLibSPNG.set_ihdr(ctx, pointerof(ihdr))\nerror = LibSPNG.encode_image(ctx, image_data.buffer, image_data.size, LibSPNG::Format::PNG, LibSPNG::EncodeFlags::Finalize)\ncheck_png(error)\nbuffer = LibSPNG.get_png_buffer(ctx, out size, pointerof(error))\nif ctx\nelse\n raise(::CrImage::Exception.new(\"Failed to get a buffer\"))\nend\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibC.free(buffer)\n"}}]},{"html_id":"Crystal Image/CrImage/Format/PPM","path":"CrImage/Format/PPM.html","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM","abstract":false,"locations":[{"filename":"src/cr-image/format/ppm.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/format/ppm.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to PPM.\n\n```\nimage = File.open(\"image.ppm\") { |file| CrImage::RGBAImage.from_ppm(file) }\nFile.open(\"other_image.ppm\") { |file| image.to_ppm(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.ppm\")\nimage.save(\"other_image.ppm\")\n```","summary":"

        Provides methods to read from and write to PPM.

        ","instance_methods":[{"html_id":"to_ppm(io:IO):Nil-instance-method","name":"to_ppm","doc":"Output this image to `io` using PPM image encoding","summary":"

        Output this image to io using PPM image encoding

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/cr-image/format/ppm.cr","line_number":56,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/format/ppm.cr#L56"},"def":{"name":"to_ppm","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"io << \"P6\\n\"\n(((io << @width) << \" \") << @height) << \"\\n\"\nio << \"255\\n\"\nsize.times do |index|\n io.write_byte(red.unsafe_fetch(index))\n io.write_byte(green.unsafe_fetch(index))\n io.write_byte(blue.unsafe_fetch(index))\nend\n"}}]},{"html_id":"Crystal Image/CrImage/Format/Save","path":"CrImage/Format/Save.html","kind":"module","full_name":"CrImage::Format::Save","name":"Save","abstract":false,"locations":[{"filename":"src/cr-image/format/save.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/format/save.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"instance_methods":[{"html_id":"save(filename:String):self-instance-method","name":"save","doc":"Write this image to file using the provided filename.\n\nThis method _will not_ create intermediate directory paths. This method will throw an\nerror if they don't exist.","summary":"

        Write this image to file using the provided filename.

        ","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/save.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/format/save.cr#L20"},"def":{"name":"save","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"File.open(filename, \"w\") do |file|\n {% if true %}\n case filename\n {% for format in SUPPORTED_FORMATS %}\n when .ends_with?({{ format[:extension] }}) then to_{{ format[:method].id }}(file)\n {% end %}\n else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map do |__arg0|\n __arg0[:extension].id\n end.join(\", \")).id }}\"\n end\n {% end %}\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Format/WebP","path":"CrImage/Format/WebP.html","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP","abstract":false,"locations":[{"filename":"src/lib-formats/webp.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/webp.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to WebP. Requires `libwebp` to function.\n\n```\nimage = File.open(\"image.webp\") { |file| CrImage::RGBAImage.from_webp(file) }\nFile.open(\"other_image.webp\") { |file| image.to_webp(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.webp\")\nimage.save(\"other_image.webp\")\n```","summary":"

        Provides methods to read from and write to WebP.

        ","instance_methods":[{"html_id":"to_webp(io:IO):Nil-instance-method","name":"to_webp","doc":"Write image to `io` using WebP encoding","summary":"

        Write image to io using WebP encoding

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/lib-formats/webp.cr","line_number":58,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/lib-formats/webp.cr#L58"},"def":{"name":"to_webp","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"image_data = String.build do |string|\n size.times do |index|\n string.write_byte(red.unsafe_fetch(index))\n string.write_byte(green.unsafe_fetch(index))\n string.write_byte(blue.unsafe_fetch(index))\n string.write_byte(alpha.unsafe_fetch(index))\n end\nend\nsize = LibWebP.encode_lossless_rgba(image_data, @width, @height, @width * 4, out buffer)\ncheck_webp(size)\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibWebP.free(buffer)\n"}}]}]},{"html_id":"Crystal Image/CrImage/GrayscaleImage","path":"CrImage/GrayscaleImage.html","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage","abstract":false,"superclass":{"html_id":"Crystal Image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},"ancestors":[{"html_id":"Crystal Image/CrImage/Format/WebP","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP"},{"html_id":"Crystal Image/CrImage/Format/PNG","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG"},{"html_id":"Crystal Image/CrImage/Format/JPEG","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG"},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"Crystal Image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"Crystal Image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"Crystal Image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"Crystal Image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"Crystal Image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"Crystal Image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"Crystal Image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"Crystal Image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/grayscale_image.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/grayscale_image.cr#L13"},{"filename":"src/jpeg.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/jpeg.cr#L4"},{"filename":"src/png.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/png.cr#L4"},{"filename":"src/stumpy.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/stumpy.cr#L38"},{"filename":"src/webp.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/webp.cr#L4"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/Format/JPEG","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG"},{"html_id":"Crystal Image/CrImage/Format/PNG","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG"},{"html_id":"Crystal Image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"Crystal Image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"Crystal Image/CrImage/Format/WebP","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP"},{"html_id":"Crystal Image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"Crystal Image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"Crystal Image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"Crystal Image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"Crystal Image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"}],"extended_modules":[{"html_id":"Crystal Image/CrImage/Format/Open","kind":"module","full_name":"CrImage::Format::Open","name":"Open"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"An image in Grayscale. These image types are the easiest to perform feature and information extraction from, where\nthere is only one channel to examine, and so has methods for constructing `Mask`s from (see `#threshold` below).\n\nAn `RGBAImage` would become a `GrayscaleImage` this way:\n```\nimage.to_gray\n```\n\n\"Woman\n\"Woman","summary":"

        An image in Grayscale.

        ","constructors":[{"html_id":"from_jpeg(image_data:Bytes):self-class-method","name":"from_jpeg","doc":"Read `image_data` as JPEG encoded bytes","summary":"

        Read image_data as JPEG encoded bytes

        ","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_jpeg","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"handle = LibJPEGTurbo.init_decompress\ncheck_jpeg(handle, LibJPEGTurbo.decompress_header3(handle, image_data, image_data.size, out width, out height, out _subsampling, out _colorspace))\nbuffer = Bytes.new((width * height) * 3, 0)\ncheck_jpeg(handle, LibJPEGTurbo.decompress2(handle, image_data, LibC::ULong.new(image_data.size), buffer, width, 0, height, LibJPEGTurbo::PixelFormat::RGB, 0))\ncheck_jpeg(handle, LibJPEGTurbo.destroy(handle))\nred = Array.new(width * height) do\n 0_u8\nend\ngreen = Array.new(width * height) do\n 0_u8\nend\nblue = Array.new(width * height) do\n 0_u8\nend\nalpha = Array.new(width * height) do\n 255_u8\nend\n(width * height).times do |index|\n red.unsafe_put(index, buffer[index * 3])\n green.unsafe_put(index, buffer[(index * 3) + 1])\n blue.unsafe_put(index, buffer[(index * 3) + 2])\nend\nnew(red, green, blue, alpha, width, height)\n"}},{"html_id":"from_jpeg(io:IO):self-class-method","name":"from_jpeg","doc":"Construct an Image from reading in bytes from `io`","summary":"

        Construct an Image from reading in bytes from io

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_jpeg","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_jpeg(io.getb_to_end)"}},{"html_id":"from_png(image_data:Bytes):self-class-method","name":"from_png","doc":"Read `image_data` and PNG encoded bytes","summary":"

        Read image_data and PNG encoded bytes

        ","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_png","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"ctx = LibSPNG.ctx_new(LibSPNG::CtxFlags::None)\nif ctx\nelse\n raise(::CrImage::Exception.new(\"Failed to create a context\"))\nend\nLibSPNG.set_png_buffer(ctx, image_data, image_data.size)\ncheck_png(LibSPNG.get_ihdr(ctx, out ihdr))\ncheck_png(LibSPNG.decoded_image_size(ctx, LibSPNG::Format::RGBA8, out image_size))\nimage = Bytes.new(image_size.to_i, 0_u8)\ncheck_png(LibSPNG.decode_image(ctx, image, image_size, LibSPNG::Format::RGBA8, LibSPNG::DecodeFlags::None))\nLibSPNG.ctx_free(ctx)\nsize = image_size // 4\nwidth = size // ihdr.height\nheight = ihdr.height\nred = Array.new(size) do\n 0_u8\nend\ngreen = Array.new(size) do\n 0_u8\nend\nblue = Array.new(size) do\n 0_u8\nend\nalpha = Array.new(size) do\n 0_u8\nend\nsize.times do |index|\n position = index * 4\n red.unsafe_put(index, image[position + 0])\n green.unsafe_put(index, image[position + 1])\n blue.unsafe_put(index, image[position + 2])\n alpha.unsafe_put(index, image[position + 3])\nend\nnew(red, green, blue, alpha, width.to_i, height.to_i)\n"}},{"html_id":"from_png(io:IO):self-class-method","name":"from_png","doc":"Construct an Image by reading bytes from `io`","summary":"

        Construct an Image by reading bytes from io

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_png","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_png(io.getb_to_end)"}},{"html_id":"from_ppm(image_data:Bytes):self-class-method","name":"from_ppm","doc":"Read `image_data` as PPM encoded bytes","summary":"

        Read image_data as PPM encoded bytes

        ","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_ppm","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"from_ppm(IO::Memory.new(image_data))"}},{"html_id":"from_ppm(io:IO):self-class-method","name":"from_ppm","doc":"Read bytes from `io` as PPM encoded","summary":"

        Read bytes from io as PPM encoded

        ","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_ppm","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"_magic_number = io.gets(\"\\n\", chomp: true)\nwidth = (io.gets(\" \", chomp: true)).try(&.to_i)\nheight = (io.gets(\"\\n\", chomp: true)).try(&.to_i)\n_maximum_color_value = io.gets(\"\\n\", chomp: true)\nif width && height\n red = Array.new(width * height) do\n 0_u8\n end\n green = Array.new(width * height) do\n 0_u8\n end\n blue = Array.new(width * height) do\n 0_u8\n end\n alpha = Array.new(width * height) do\n 255_u8\n end\n (width * height).times do |index|\n red_byte = io.read_byte\n green_byte = io.read_byte\n blue_byte = io.read_byte\n if (red_byte && green_byte) && blue_byte\n red.unsafe_put(index, red_byte)\n green.unsafe_put(index, green_byte)\n blue.unsafe_put(index, blue_byte)\n else\n raise(\"The image ends prematurely\")\n end\n end\n new(red, green, blue, alpha, width, height)\nelse\n raise(\"The image doesn't have width or height\")\nend\n"}},{"html_id":"from_webp(image_data:Bytes):self-class-method","name":"from_webp","doc":"Read `image_data` as WebP encoded bytes","summary":"

        Read image_data as WebP encoded bytes

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        Read bytes from io as WebP encoded

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        Create a GrayscaleImage from a set of color channels (delegates to RGBAImage#to_gray)

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        Create a GrayscaleImage with only an Array(UInt8) (alpha channel initialized as 255 throughout)

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        Set the underlying Array(UInt8) of channel_type to the new channel.

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        Create a new GrayscaleImage as a copy of this one

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        Run provided block with the ChannelType::Gray and ChannelType::Alpha channels and channel types.

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        Return the "#green" channel (returns #gray)

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        Height of image

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        Invert grayscale pixels (replace each pixel will 255 - p for all p in @gray).

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        Invert grayscale pixels (replace each pixel will 255 - p for all p in @gray).

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        Construct a Mask from this GrayscaleImage using the passed in block to determine if a given pixel should be true or not

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        Return the "#red" channel (returns #gray)

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        Return the number of pixels this image contains

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        Construct a simple threshold Mask containing all pixels with a UInt8 value greater than #threshold Given sample image:

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        Returns self

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        Convert this GrayscaleImage to an RGBAImage.

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        Width of image

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        Blurs the image

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        Brightens an image (increases white value)

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        Swaps channels of ChannelType supported by an image

        ","instance_methods":[{"html_id":"channel_swap(a:ChannelType,b:ChannelType):self-instance-method","name":"channel_swap","abstract":false,"args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"args_string":"(a : ChannelType, b : ChannelType) : self","args_html":"(a : ChannelType, b : ChannelType) : self","location":{"filename":"src/cr-image/operation/channel_swap.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/channel_swap.cr#L12"},"def":{"name":"channel_swap","args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"return_type":"self","visibility":"Public","body":"clone.channel_swap!(a, b)"}},{"html_id":"channel_swap!(a:ChannelType,b:ChannelType):self-instance-method","name":"channel_swap!","abstract":false,"args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"args_string":"(a : ChannelType, b : ChannelType) : self","args_html":"(a : ChannelType, b : ChannelType) : self","location":{"filename":"src/cr-image/operation/channel_swap.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/channel_swap.cr#L16"},"def":{"name":"channel_swap!","args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"return_type":"self","visibility":"Public","body":"ch_a, ch_b = self[a], self[b]\nself[a] = ch_b\nself[b] = ch_a\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Contrast","path":"CrImage/Operation/Contrast.html","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast","abstract":false,"locations":[{"filename":"src/cr-image/operation/contrast.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/contrast.cr#L11"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Increases contrast of an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.contrast(20)\n```\n\"Contrasted","summary":"

        Increases contrast of an image

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        Crops an image

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width} pixels beyond width of the image (#{width})\")\nend\nif (y + new_height) > height\n raise(\"Crop dimensions extend #{(y + new_height) - height} pixels beyond height of the image (#{height})\")\nend\nnew_size = new_width * new_height\nheight_offset = y * width\neach_channel do |channel, channel_type|\n resized_channel = Array.new(new_size) do\n 0_u8\n end\n new_height.times do |new_y|\n orig_index = (height_offset + (new_y * width)) + x\n resized_channel[new_y * new_width, new_width] = channel[orig_index, new_width]\n end\n self[channel_type] = resized_channel\nend\n@width = new_width\n@height = new_height\nself\n"}},{"html_id":"crop!(region:Region):self-instance-method","name":"crop!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"}],"args_string":"(region : Region) : self","args_html":"(region : Region) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/crop.cr#L28"},"def":{"name":"crop!","args":[{"name":"region","external_name":"region","restriction":"Region"}],"return_type":"self","visibility":"Public","body":"crop!(*region.to_tuple)"}}]},{"html_id":"Crystal Image/CrImage/Operation/Draw","path":"CrImage/Operation/Draw.html","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw","abstract":false,"locations":[{"filename":"src/cr-image/operation/draw.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/draw.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Draws shapes in the image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.draw_square(40, 30, 80, 80, CrImage::Color.of(\"#00f\"))\nimage.draw_circle(80, 70, 40, CrImage::Color.of(\"#00f\"))\n```\n\"Woman\n\"Woman\n\nCan also use the `fill: true` parameter to fill in the drawn shapes","summary":"

        Draws shapes in the image

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        Draw a circle around the region's center (see Region#center)

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fill)"}},{"html_id":"draw_square(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/draw.cr#L20"},"def":{"name":"draw_square","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":5,"return_type":"self","visibility":"Public","body":"clone.draw_square!(x, y, box_width, box_height, color, fill: fill)"}},{"html_id":"draw_square(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/draw.cr#L16"},"def":{"name":"draw_square","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"clone.draw_square!(region, color, fill: fill)"}},{"html_id":"draw_square!(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/draw.cr#L28"},"def":{"name":"draw_square!","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":5,"return_type":"self","visibility":"Public","body":"if (x + box_width) > width\n raise(\"Box dimensions extend #{(x + box_width) - width} pixels beyond width of the image (#{width})\")\nend\nif (y + box_height) > height\n raise(\"Box dimensions extend #{(y + box_height) - height} pixels beyond height of the image (#{height})\")\nend\nx_i = x.to_i\ny_i = y.to_i\neach_channel do |channel, channel_type|\n channel[( (y_i * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n color[channel_type]\n end\n channel[((y_i + box_height) * width) + x_i, box_width] = Array(UInt8).new(box_width) do\n color[channel_type]\n end\n box_height.times do |i|\n if i == 0\n next\n end\n if fill\n channel[( ((y_i + i) * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n color[channel_type]\n end\n else\n channel.unsafe_put(((y_i + i) * width) + x_i, color[channel_type])\n channel.unsafe_put((((y_i + i) * width) + x_i) + box_width, color[channel_type])\n end\n end\nend\nself\n"}},{"html_id":"draw_square!(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":24,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/draw.cr#L24"},"def":{"name":"draw_square!","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"draw_square!(*region.to_tuple, color, fill: fill)"}}]},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","path":"CrImage/Operation/GaussianBlur.html","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/gaussian_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Applies a 3x3 Gaussian blur. Implementation derived from [here](https://blog.ivank.net/fastest-gaussian-blur.html)\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.gaussian_blur(1).save(\"gaussian_1_sample.jpg\")\nimage.gaussian_blur(5).save(\"gaussian_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"

        Applies a 3x3 Gaussian blur.

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        Provides methods for histogram and histogram equalization.

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        A histogram of an Image for a specific ChannelType

        ","constructors":[{"html_id":"new(image:Image,channel_type:ChannelType)-class-method","name":"new","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(image : Image, channel_type : ChannelType)","args_html":"(image : Image, channel_type : ChannelType)","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L22"},"def":{"name":"new","args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"visibility":"Public","body":"_ = allocate\n_.initialize(image, channel_type)\nif _.responds_to?(:finalize)\n ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"cdf:Hash(UInt8,Float64)-instance-method","name":"cdf","doc":"Get the cumulative distribution for the image's histogram","summary":"

        Get the cumulative distribution for the image's histogram

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":54,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L54"},"def":{"name":"cdf","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"total = 0_f64\n@cumulative_distribution_histogram || (@cumulative_distribution_histogram = normalize.map do |pixel, probability|\n original = total\n total = total + probability\n {pixel, original}\nend.to_h)\n"}},{"html_id":"counts:Hash(UInt8,Int32)-instance-method","name":"counts","doc":"Get the raw counts for a given pixel value (0-255) in the image","summary":"

        Get the raw counts for a given pixel value (0-255) in the image

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L28"},"def":{"name":"counts","return_type":"Hash(UInt8, Int32)","visibility":"Public","body":"@internal_hist || (@internal_hist = calculate_counts)"}},{"html_id":"equalize:Hash(UInt8,UInt8)-instance-method","name":"equalize","doc":"Remap the cumalitive distribution of pixels to get a new, more spread out pixel value","summary":"

        Remap the cumalitive distribution of pixels to get a new, more spread out pixel value

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":64,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L64"},"def":{"name":"equalize","return_type":"Hash(UInt8, UInt8)","visibility":"Public","body":"cdf.map do |pixel, cumalative|\n {pixel, ((cumalative * 255).clamp(0, 255)).to_u8}\nend.to_h"}},{"html_id":"normalize:Hash(UInt8,Float64)-instance-method","name":"normalize","doc":"Get pixel counts normalized - all values between 0.0 and 1.0","summary":"

        Get pixel counts normalized - all values between 0.0 and 1.0

        ","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":45,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/histogram.cr#L45"},"def":{"name":"normalize","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"counts.map do |pixel, count|\n {pixel, count.to_f / @image.size}\nend.to_h"}}]}]},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","path":"CrImage/Operation/HorizontalBlur.html","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/horizontal_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the horizontal axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.horizontal_blur(1).save(\"horizontal_1_sample.jpg\")\nimage.horizontal_blur(5).save(\"horizontal_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"

        Blur an image along the horizontal axis

        ","instance_methods":[{"html_id":"horizontal_blur(value:Int32):self-instance-method","name":"horizontal_blur","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/horizontal_blur.cr#L14"},"def":{"name":"horizontal_blur","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.horizontal_blur!(value)"}},{"html_id":"horizontal_blur!(value:Int32):self-instance-method","name":"horizontal_blur!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/horizontal_blur.cr#L18"},"def":{"name":"horizontal_blur!","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((value + value) + 1)\neach_channel do |channel|\n @height.times do |y|\n c_index : Int32 = y * @width\n l_index : Int32 = c_index\n r_index : Int32 = c_index + value\n f_value : Int32 = (channel.unsafe_fetch(c_index)).to_i\n l_value : Int32 = (channel.unsafe_fetch((c_index + @width) - 1)).to_i\n c_value : Int32 = (value + 1) * f_value\n (0..(value - 1)).each do\n c_value = c_value + (channel.unsafe_fetch(c_index))\n end\n (0..value).each do\n c_value = c_value + ((channel.unsafe_fetch(r_index)).to_i - f_value)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n r_index = r_index + 1\n c_index = c_index + 1\n end\n ((value + 1)..((@width - value) - 1)).each do\n c_value = c_value + ((channel.unsafe_fetch(r_index)).to_i - (channel.unsafe_fetch(l_index)).to_i)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n r_index = r_index + 1\n l_index = l_index + 1\n c_index = c_index + 1\n end\n ((@width - value)..(@width - 1)).each do\n c_value = c_value + (l_value - (channel.unsafe_fetch(l_index)).to_i)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n l_index = l_index + 1\n c_index = c_index + 1\n end\n end\n (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","path":"CrImage/Operation/MaskApply.html","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply","abstract":false,"locations":[{"filename":"src/cr-image/operation/mask_apply.cr","line_number":27,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L27"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Apply a mask to an image\n\nTaking sample `image`:\n\n\"Woman\n\nAnd mask\n\n\"Black\n\n```\nmask = CrImage::Mask.new(image, false)\nmask[50..90, 65..75] = true\nmask.to_gray.save(\"apply_mask_mask.jpg\")\n\nimage.apply(mask).save(\"apply_mask.jpg\")\n\nimage.apply_color(mask, CrImage::Color.of(\"#00f\")).save(\"apply_mask_color.jpg\")\n\nimage.apply(mask) do |x, y, pixel, channel_type|\n Math.min(255, pixel + 50).to_u8 if channel_type.blue?\nend.save(\"apply_mask_block.jpg\")\n```\n\"Image\n\"Thin\n\"Thin","summary":"

        Apply a mask to an image

        ","instance_methods":[{"html_id":"apply(mask:Mask):self-instance-method","name":"apply","doc":"Black out all pixels but those found in the mask","summary":"

        Black out all pixels but those found in the mask

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":29,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L29"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"clone.apply!(mask)"}},{"html_id":"apply(mask:Mask,&block:Int32,Int32,UInt8,ChannelType->UInt8|Nil):self-instance-method","name":"apply","doc":"Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.\n\nDoes not change values not matched by the mask","summary":"

        Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":36,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L36"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(Int32, Int32, UInt8, ChannelType -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"clone.apply!(mask, &block)"}},{"html_id":"apply!(mask:Mask):self-instance-method","name":"apply!","doc":"TODO: add apply version that accepts 1+ ChannelType that the mask should apply to (i.e. make a background completely transparent, not just transparent black)","summary":"

        TODO add apply version that accepts 1+ ChannelType that the mask should apply to (i.e.

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":46,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L46"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel|\n channel.map_with_index! do |pixel, i|\n mask.at(i) ? pixel : 0_u8\n end\nend\nself\n"}},{"html_id":"apply!(mask:Mask,&block:Int32,Int32,UInt8,ChannelType->UInt8|Nil):self-instance-method","name":"apply!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : Int32, Int32, UInt8, ChannelType -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":55,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L55"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(Int32, Int32, UInt8, ChannelType -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel, channel_type|\n channel.map_with_index! do |pixel, i|\n mask.at(i) ? (block.call(i % width, i // width, pixel, channel_type)) || pixel : pixel\n end\nend\nself\n"}},{"html_id":"apply_color(mask:Mask,color:Color):self-instance-method","name":"apply_color","doc":"Change the color of all pixels that match the mask","summary":"

        Change the color of all pixels that match the mask

        ","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":41,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L41"},"def":{"name":"apply_color","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"clone.apply_color!(mask, color)"}},{"html_id":"apply_color!(mask:Mask,color:Color):self-instance-method","name":"apply_color!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":66,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/mask_apply.cr#L66"},"def":{"name":"apply_color!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"apply!(mask) do |_, _, _, channel_type|\n color[channel_type]\nend"}}]},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","path":"CrImage/Operation/VerticalBlur.html","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/vertical_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the vertical axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.vertical_blur(1).save(\"vertical_1_sample.jpg\")\nimage.vertical_blur(5).save(\"vertical_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"

        Blur an image along the vertical axis

        ","instance_methods":[{"html_id":"vertical_blur(value:Int32):self-instance-method","name":"vertical_blur","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/vertical_blur.cr#L14"},"def":{"name":"vertical_blur","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.vertical_blur!(value)"}},{"html_id":"vertical_blur!(value:Int32):self-instance-method","name":"vertical_blur!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/operation/vertical_blur.cr#L18"},"def":{"name":"vertical_blur!","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((value + value) + 1)\neach_channel do |channel|\n @width.times do |x|\n c_index : Int32 = x\n l_index : Int32 = c_index\n r_index : Int32 = c_index + (value * @width)\n f_value : Int32 = (channel.unsafe_fetch(c_index)).to_i\n l_value : Int32 = (channel.unsafe_fetch(c_index + (@width * (@height - 1)))).to_i\n c_value : Int32 = (value + 1) * f_value\n (0..(value - 1)).each do\n c_value = c_value + (channel.unsafe_fetch(c_index))\n end\n (0..value).each do\n c_value = c_value + ((channel.unsafe_fetch(r_index)).to_i - f_value)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n r_index = r_index + @width\n c_index = c_index + @width\n end\n ((value + 1)..((@height - value) - 1)).each do\n c_value = c_value + ((channel.unsafe_fetch(r_index)).to_i - (channel.unsafe_fetch(l_index)).to_i)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n l_index = l_index + @width\n r_index = r_index + @width\n c_index = c_index + @width\n end\n ((@height - value)..(@height - 1)).each do\n c_value = c_value + (l_value - (channel.unsafe_fetch(l_index)).to_i)\n buffer.unsafe_put(c_index, ((c_value * multiplier).clamp(0, 255)).to_u8)\n l_index = l_index + @width\n c_index = c_index + @width\n end\n end\n (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]}]},{"html_id":"Crystal Image/CrImage/Region","path":"CrImage/Region.html","kind":"struct","full_name":"CrImage::Region","name":"Region","abstract":false,"superclass":{"html_id":"Crystal Image/Struct","kind":"struct","full_name":"Struct","name":"Struct"},"ancestors":[{"html_id":"Crystal Image/Struct","kind":"struct","full_name":"Struct","name":"Struct"},{"html_id":"Crystal Image/Value","kind":"struct","full_name":"Value","name":"Value"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/region.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/region.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Represents a rectangular area on an `Image` from its upper left corner `x` and `y` coordinates, and a `width` and `height`.\n\nSee `Operation::Crop#crop` and `Operation::Draw#draw_square` for examples using it.","summary":"

        Represents a rectangular area on an Image from its upper left corner #x and #y coordinates, and a #width and #height.

        ","constructors":[{"html_id":"center(x:UInt16,y:UInt16,width:UInt16,height:UInt16):Region-class-method","name":"center","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"UInt16"},{"name":"y","external_name":"y","restriction":"UInt16"},{"name":"width","external_name":"width","restriction":"UInt16"},{"name":"height","external_name":"height","restriction":"UInt16"}],"args_string":"(x : UInt16, y : UInt16, width : UInt16, height : UInt16) : Region","args_html":"(x : UInt16, y : UInt16, width : UInt16, height : UInt16) : Region","location":{"filename":"src/cr-image/region.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/region.cr#L11"},"def":{"name":"center","args":[{"name":"x","external_name":"x","restriction":"UInt16"},{"name":"y","external_name":"y","restriction":"UInt16"},{"name":"width","external_name":"width","restriction":"UInt16"},{"name":"height","external_name":"height","restriction":"UInt16"}],"return_type":"Region","visibility":"Public","body":"new(x - (width // 2), y - (height // 2), width, height)"}},{"html_id":"new(x:UInt16,y:UInt16,width:UInt16,height:UInt16)-class-method","name":"new","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"UInt16"},{"name":"y","external_name":"y","restriction":"UInt16"},{"name":"width","external_name":"width","restriction":"UInt16"},{"name":"height","external_name":"height","restriction":"UInt16"}],"args_string":"(x : UInt16, y : UInt16, width : UInt16, height : UInt16)","args_html":"(x : UInt16, y : UInt16, width : UInt16, height : UInt16)","location":{"filename":"src/cr-image/region.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/region.cr#L5"},"def":{"name":"new","args":[{"name":"x","external_name":"x","restriction":"UInt16"},{"name":"y","external_name":"y","restriction":"UInt16"},{"name":"width","external_name":"width","restriction":"UInt16"},{"name":"height","external_name":"height","restriction":"UInt16"}],"visibility":"Public","body":"_ = allocate\n_.initialize(x, y, width, height)\nif _.responds_to?(:finalize)\n ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"center:Tuple(Int32,Int32)-instance-method","name":"center","doc":"Return the `{x, y}` tuple of the center coordinates of this `Region`","summary":"

        Return the {x, y} tuple of the center coordinates of this Region

        ","abstract":false,"location":{"filename":"src/cr-image/region.cr","line_number":21,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/region.cr#L21"},"def":{"name":"center","return_type":"Tuple(Int32, Int32)","visibility":"Public","body":"{(width.to_i // 2) + x.to_i, (height.to_i // 2) + y.to_i}"}},{"html_id":"clone-instance-method","name":"clone","abstract":false,"location":{"filename":"src/cr-image/region.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/region.cr#L5"},"def":{"name":"clone","visibility":"Public","body":"self.class.new(@x.clone, @y.clone, @width.clone, @height.clone)"}},{"html_id":"copy_with(x_x=@x,y_y=@y,width_width=@width,height_height=@height)-instance-method","name":"copy_with","abstract":false,"args":[{"name":"_x","default_value":"@x","external_name":"x","restriction":""},{"name":"_y","default_value":"@y","external_name":"y","restriction":""},{"name":"_width","default_value":"@width","external_name":"width","restriction":""},{"name":"_height","default_value":"@height","external_name":"height","restriction":""}],"args_string":"(x _x = @x, y _y = @y, width _width = @width, height _height = @height)","args_html":"(x _x = @x, y _y = @y, width _width = @width, height _height = @height)","location":{"filename":"src/cr-image/region.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/region.cr#L5"},"def":{"name":"copy_with","args":[{"name":"_x","default_value":"@x","external_name":"x","restriction":""},{"name":"_y","default_value":"@y","external_name":"y","restriction":""},{"name":"_width","default_value":"@width","external_name":"width","restriction":""},{"name":"_height","default_value":"@height","external_name":"height","restriction":""}],"visibility":"Public","body":"self.class.new(_x, _y, _width, _height)"}},{"html_id":"crop(image:Image):Image-instance-method","name":"crop","doc":"Crop a provided `Image` with this region, using `Operation::Crop#crop`","summary":"

        Crop a provided Image with this region, using Operation::Crop#crop

        ","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"}],"args_string":"(image : Image) : Image","args_html":"(image : Image) : Image","location":{"filename":"src/cr-image/region.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/770447b9fd994f49a86dc000ad2a141b1b91629b/src/cr-image/region.cr#L16"},"def":{"name":"crop","args":[{"name":"image","external_name":"image","restriction":"Image"}],"return_type":"Image","visibility":"Public","body":"image.crop(self)"}},{"html_id":"height:UInt16-instance-method","name":"height","abstract":false,"def":{"name":"height","return_type":"UInt16","visibility":"Public","body":"@height"}},{"html_id":"to_tuple:Tuple(Int32,Int32,Int32,Int32)-instance-method","name":"to_tuple","doc":"Return this `Region` as a `x`, `y`, `width`, and `height` tuple","summary":"

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        Create a copy of this image

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'!$+$LRNª°¬»Á½§­©«±¯²»º²»º²»º²»º²»º²»º²»º²»º±º¹±º¹±º¹±º¹±º¹±º¹±º¹±º·ÀÆÂNUN")0) '   '  !!(!&     '"*##*#% &"\b^®´°¼Â¾¦¬¨²»º²»º²»º²»º²»º²»º²»º²»º­¶µ°¹¸²»º­¶µ«´³µ¾½µ¾½¥®«E>  #iok©¯­®´²§­«¤ª¨¯µµ³¹¹¨®®§­­­²µ§¬¯¤­¬¤­¬¤­¬¤­¬¤­¬¤­¬¤­¬¤­¬¢«ª£¬«¤­¬£¬«¢«ª¢«ª¤­¬¥®«W^V#+     #!(  +‚‰®µ®š¡š£©¥£©¥£©¥£©¥£©§£©§£©§£©§£©©£¨«£©©£©©£©©£©©£©§£©§˜žœ­³¯š œ¦¬¨«²«”›”181  6=6ŠŒ¬²®£©§¨®¬¯µ³©¯­¨®®§­­¦¬¬®´´®³¶Ÿ¤§¤­¬¤­¬¤­¬¤­¬¤­¬¤­¬¤­¬¤­¬£¬«£¬«£¬«£¬«£¬«£¬«£¬«£¬©JQI%-""" !(  !‰ˆ¥¬¥›¢›£©¥£©¥£©¥£©¥£©§£©§£©§£©§£¨«£¨«£©©£©©£©©£©©£©§£©§£©§•›™¯µ±¦¬¨˜Ÿ˜²¹²’™’,3,DJF¤ª¦­³¯¬²®¶¼ºž¤¢«±¯¦¬ª ¦¦¡§§¨­°«°³©®±¦«®¤­¬¤­¬¤­¬¤­¬¤­¬¤­¬¤­¬¤­¬£¬«£¬«£¬«¤­¬¤­¬¤­¬£¬«¢«¨> 8).to_u8 + green << (rgba.g >> 8).to_u8 + blue << (rgba.b >> 8).to_u8 + alpha << (rgba.a >> 8).to_u8 + end + end + + CrImage::RGBAImage.new(red, green, blue, alpha, width, height) + end + end +end + +module CrImage + class RGBAImage + def to_stumpy : StumpyCore::Canvas + StumpyCore::Canvas.new(width, height) do |x, y| + color = self[x, y] + StumpyCore::RGBA.new(color.red.to_u16 << 8, color.green.to_u16 << 8, color.blue.to_u16 << 8, color.alpha.to_u16 << 8) + end + end + end + + class GrayscaleImage + def to_stumpy : StumpyCore::Canvas + StumpyCore::Canvas.new(width, height) do |x, y| + color = self[x, y] + StumpyCore::RGBA.new(color.gray.to_u16 << 8, color.gray.to_u16 << 8, color.gray.to_u16 << 8, color.alpha.to_u16 << 8) + end + end + end +end