Get a better grayscale image for debugging (highest bit is always 0).
Merge branch 'master' of github.com:molohov/gpu2
Remove debugging function and test executable.
Replace line.c using 2-vertex polygons. Modify the existing polygon code for 1 and 2 vertex polygons (point and lines).
Break line-draw with steep lines...
Add back line-draw since it's needed for steep lines.
Use 4-byte writes for software prototype.
Minor.
Function rename.