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Clément Foucault 86914e7133 GPUSelect: Don't read depth on every draw
If the draw uses the same id as the previous draw, there is no need to read the depth
buffer at this point, avoiding a CPU-GPU sync bubble.

Fixes T62511 Selection is significantly slower in production scenes.
With this patch glReadPixels is not the bottleneck. Regular drawing Is still very
slow so I would suggest fixing the regular drawing first before trying to
improve the selection algorithm.
2019-04-26 15:33:49 +02:00
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2019-02-18 08:22:12 +11:00
2019-02-18 08:22:12 +11:00
2019-02-18 08:22:12 +11:00
2019-04-18 07:59:28 +02:00