Added Huffman encoder/decoder + alpha blending #1
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I've implemented a lossless encoder/decoder for images, using Huffman compression. This may offer you greater freedom in what GUI elements you want to include. Huffman compression offers good space/time properties: GUI images tend to compress well as they consist mostly of a few colors, and the decoder only requires ~ 1 table lookup + a bunch of shifts/ands per pixel.
I've also implemented 5-bit alpha blending, which can be combined with the Huffman decoder to display GUI elements with curved, anti-aliased edges:
These commits have been tested successfully
in a local test harness, but not on actual arducorder mini hardware.