Entry of giuliom95 for the GameLoop.it contest Software blitter con alpha blending (in Italian).
Three version are proposed:
- Old (inside
blit.old.c). The simplest but slowest - New (inside
blit.new.c). The fastest. It is an improvement of old: the main improvement is to bound efficiently the two for cycles. - LUT (inside
blit.lut.c). It is an experiment and uses Look-Up Tables for conversions from RGB565 to floatRGB.
blit_utils.c contains tests, an exporter and importer from and to ppm, and simple benchmarking utilities.
buffer.ppm and sprite.ppm are two ppm images useful for testing.