Allow configuring where colour stops occur.
Add support for colour stops, equally spaced.
10 stops should be generous!
Add angular linear gradient support!
Add basic support for linear gradients!
Implement background-size!
Fix coordinatespace for texture-pixel lookup.
Build texturing infrastructure & implement background-color!
Build texturing infrastructure.
Add support for background-clip & prepare for multilayered backgrounds!
Fix transformation matrix (should be fixed upstream, but that'd be breaking).
Fix colour output, add OpenGL cleanup.
Implement background-colour rendering!
Draft background-colour shader.