Comment 0 for bug 270690
Revision history for this message
| wesley (mrthefter) wrote [RADEON] exa acclerated transparecy artifacts at canvas border | #0 |
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bbfa235
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Binary package hint: xserver-
Using EXA RENDER acceleration in the open source radeon driver, on an rv250 (Mobility 9000), certain transparency elements will get artifacts along the border of the canvas, for lack of a better word. It's not the border of the actual image, but the border of the entire canvas, i.e. a 32x32 image, of which the non-transparent image is only the center 16x16 square, the artifact would be along the "invisible" 32x32 edges.
The artifacts are consistent, in that it's always the same elements that have the problem.
Ubuntu Hardy Heron, 8.04
Xserver 1.4, Xorg 7.3
xserver-
The problem has existed since accelerated RENDER has been implemented. Still persists, even in the newer Intrepid Ibex 8.10 xserver and ati drivers.
Setting RenderAccel to false, or MigrationHeuristic to greedy makes the problem disappear, as this disables RENDER acceleration.
It doesn't seem to affect transparency that's generated by the compositor, but by transparency that's specified by an image.