Tempe 0.3

This is a release which focuses on performance. Most shape classes now check
to see whether each sub-shape intersects with the current drawing region in
the raster, and skip rendering if this is the case. Text objects perform this
check at the level of individual character. This gives a significant
improvement in rendering time, particularly when working with smaller buffers,
for large Text objects, and when performing updates.

Additionally, profiling indicated that character lookup in bitmap font objects
was a major bottleneck for text rendering. Fonts now cache those lookups in a
dictionary. This can be turned off with an initialization option, and there is
a method to clear the cache if the memory is needed.

These changes add up to an order of magnitude speed improvement in some cases.

Additional improvements include:

• Text objects can now be vertically and horizontally aligned relative to the
  geometry.
• a new Window Shape that holds a subsurface that makes scrolling groups of
  Shapes easier.
• support for Waveshare Pico-ResTouch-LCD 2.8 displays, thanks to @JoGeDuBo.
• replace Roboto fonts with Ubuntu fonts, which render better at small sizes.
• additional examples and various small fixes.

Thanks

The following people contributed to this release:

@JoGeDuBo, @corranwebster

What's Changed

• Bump version numbers to 0.3.dev by @corranwebster in #48
• Add sub-shape clipping by @corranwebster in #49
• Fast text rendering by @corranwebster in #50
• Add per-item alignment to text. by @corranwebster in #52
• Handle updating Text object alignments properly by @corranwebster in #53
• Add Window shape that holds a surface by @corranwebster in #56
• Replace Roboto fonts with Ubuntu fonts by @corranwebster in #57
• Improved handling of reset in ST7789 display by @corranwebster in #58
• Add an example using a Window and buttons to scroll text. by @corranwebster in #61
• Fix package file for recent updates. by @corranwebster in #62
• Add Waveshare Pico-ResTouch-LCD-2.8 support by @corranwebster in #60
• Fix Temperature Sensor example. by @corranwebster in #63

Full Changelog: 0.2...0.3

Tempe 0.2

This is a small release which fixes a number of bugs, provides formal support for Pimoroni SPI-based ST7789 displays, and adds information about writing displays to the documentation.

Version 0.2 now assumes that the memory used by Raster objects is now a simple read/write buffer of bytes, rather than an array of unsigned 16-bit integers, which allows allocation of larger chunks of memory.

Thanks to those involved in the Micropython discussion boards for the feedback that led to these improvements.

What's Changed

• Speed up transfers of contiguous memory by @corranwebster in #35
• Add proper library for displays by @corranwebster in #37
• Fix half-size tile error by @corranwebster in #38
• Fix font license comment. by @corranwebster in #39
• Replace use of array in working buffers. by @corranwebster in #40
• Bump version. Better unital logo. by @corranwebster in #42
• Release 0.2 by @corranwebster in #47

Full Changelog: 0.1...0.2

Tempe 0.1

This is the initial release of Tempe.