rendercheck is a set of simple tests of the X Render extension. It is
designed for authors of Render implementations in X servers
Tests currently include:
* destination coordinates correctness
* source coordinates correctness
* transformed (FilterNearest) source coordinates correctness
* composite with and without mask (with/without component alpha), with
1x1 repeating Pictures and 10x10 Pictures.
* linear gradients
* repeating sources/masks at POT and non-POT sizes
* some regression tests for bugs from freedesktop.org bugzilla
ok aanriot@
