- Try to improve the performance of color inversion by applying clipping
region during color inversion. (#75)
- Validate pixmap on window unmap/destruction. Probably slightly helpful
for #52.
- Change the design of unmap_win() and destroy_win(), a bit.
- Add warning message to help messages about features disabled at
compile time, instead of dropping their description completely. (#85)
- Silence some warnings. Code clean-up.
42e17cb4e9