robtillaart:
A blog might be what I need, never done one though. Either way, I'll find some way of keeping people in the loop.
You can post beta versions of the lib just here in this thread giving people the opportunity to react, review code and help you writing test programs.
Are you using Bresenham's line algorithm?
No, at the moment it uses an algorithm that digests lines into vertical and horizontal components. The hardware can draw runs very fast compared to per pixel manipulation. These displays have a very mild hardware accelleration. The next algorithm I've planned uses diagonal runs; combined with the TFT instruction set, diagonal lines should be a minimum of 2 - 4 times faster depending on their length.