| commit | 79f8378827becac265f5cd3a3327ab79a2c8befc | |
| author | Peter Clifton <pcjc2@cam.ac.uk> | |
| Sat, 15 Dec 2007 13:31:39 +0000 (15 13:31 +0000) | ||
| committer | Peter Clifton <pcjc2@cam.ac.uk> | |
| Sat, 15 Dec 2007 13:31:39 +0000 (15 13:31 +0000) | ||
| tree | e93718196dc7d2ecc42c02bf7046233a15a653f4 | treesnapshot (tar.gz zip) |
| parent | 33e12c8916f6b3bcd2d0df2246ef925e7b25b0dd | commitdiff |
Always redraw the screen using a blit from the backbuffer.
The previous redraw scheme which would draw to the screen concurrently
with drawing to the backbuffer is proving to be a bottle-neck to recent
desktops using compositing. Every draw we make forces the X server to
compute a damaged region and re-composite the window.
We now draw only into the backbuffer, and then invalidate the extents of
the region we've drawn.
The previous redraw scheme which would draw to the screen concurrently
with drawing to the backbuffer is proving to be a bottle-neck to recent
desktops using compositing. Every draw we make forces the X server to
compute a damaged region and re-composite the window.
We now draw only into the backbuffer, and then invalidate the extents of
the region we've drawn.
19 files changed: