exa: reintroduce src rect optimisation, with a slightly higher threshold.
- I got some feedback on gtkperf line test regression. - The increased threshold should ensure the destination optimisation is dominant.
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@ -257,6 +257,13 @@ exaCopyDirty(ExaMigrationPtr migrate, RegionPtr pValidDst, RegionPtr pValidSrc,
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pExaPixmap->offscreen = save_offscreen;
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pPixmap->devKind = save_pitch;
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/* Try to prevent source valid region from growing too many rects by
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* removing parts of it which are also in the destination valid region.
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* Removing anything beyond that would lead to data loss.
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*/
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if (REGION_NUM_RECTS(pValidSrc) > 20)
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REGION_SUBTRACT(pScreen, pValidSrc, pValidSrc, pValidDst);
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/* The copied bits are now valid in destination */
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REGION_UNION(pScreen, pValidDst, pValidDst, &CopyReg);
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