Enum representing different image channels supported by CrImage
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\ No newline at end of file
+{"repository_name":"Crystal Image","body":"\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\nEnum representing different image channels supported by CrImage
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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:
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","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
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","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\nAn 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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diff --git a/docs/search-index.js b/docs/search-index.js
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\ No newline at end of file
+crystal_doc_search_index_callback({"repository_name":"Crystal Image","body":"\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\nEnum representing different image channels supported by CrImage
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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:
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","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
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","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\nAn 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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diff --git a/sample.ppm b/sample.ppm
new file mode 100644
index 0000000..5fd4351
--- /dev/null
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+159 199
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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
