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Optimizations to filter effects, blend targets, and batching. #461

Merged
merged 2 commits into from Oct 24, 2016
Merged

Optimizations to filter effects, blend targets, and batching. #461

merged 2 commits into from Oct 24, 2016
+402 −437

Commits on Oct 24, 2016

  1. Optimizations to filter effects, blend targets, and batching. 

    * Switch all filter effects to run through the single source blend shader, instead of composite shader.
* Each render target uses a single alpha batcher now that the batching algorithm is reasonably efficient.
* Change tile size to 256x256. This seems to be a better tradeoff for GPU vs CPU time on all sites I tried.
* Switch blend targets to only allocate the used rect, rather than the entire tile size rect.

Closes #423.
    @gw3583
    gw3583 committed Oct 24, 2016
    15ebf8f

  2. Address review comments.

    @gw3583
    gw3583 committed Oct 24, 2016
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