Fully hardware accelerated: -intel, -ati, -nouveau
Incorrect rendering upstream, fixed in ubuntu: -radeonhd (only POT), -mga (only POT), -i128
Unknown status, but known to fall back to software for 2x2 source and 8x8 dest: nvidia and ati binary drivers
All the remaining drivers use software fallbacks.
Status of EXTEND_PAD hardware acceleration:
Fully hardware accelerated: -intel, -ati, -nouveau
Incorrect rendering upstream, fixed in ubuntu: -radeonhd (only POT), -mga (only POT), -i128
Unknown status, but known to fall back to software for 2x2 source and 8x8 dest: nvidia and ati binary drivers
All the remaining drivers use software fallbacks.