Archive for July, 2008

No more tears

Wednesday, July 16th, 2008

So I took a crack at tear free rendering on radeon using using the WAIT_UNTIL register to stall rendering until the vline leaves the active part of the display.  I’ve never really been one to notice tearing, so I can’t tell how well it works.
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Some notes:
- Only implemented for EXA and textured video where the destination is the front buffer (no need to stall for offscreen rendering)
- For EXA, I pick the crtc based on who has a larger part of the desktop. Ideally we’d have separate pixmaps per crtc.
- For Xv, I pick the crtc based on which one more of the dest window (need to add XV_CRTC attribute for clone mode)
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