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[Impeller] Fix modulate blend mode#36659
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auto-submit[bot] merged 1 commit intoflutter:mainfrom Oct 8, 2022
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It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption to this rule, contact Hixie on the #hackers channel in Chat (don't just cc him here, he won't see it! He's on Discord!). If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix? Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing. |
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Before, modulate was just clearing out the pass due to the zero alpha factors. The color is
src * dst, which is correct. This patch sets the alpha to also besrc * dst.Skia on left, Impeller on right:
