e98902235d
This is a reland of the new gaussian blur. Changes since revert: 1) Textures are now recycled with ping ponging to reduce memory usage 1) Mipmaps are generated to diminish the shimmering that happens with animated blurs (in metal) --- This new blur should perform faster since it scales down the image before blurring it. Jonah did early testing of it and found it to be faster. Scrolling around with the blur perf bug it seems faster. It also has a wider test bed and is hopefully easier to maintain since it contains all of its logic for both directions. testing: There are existing blur tests and we've backfilled more as we've added features to this blur. fixes https://github.com/flutter/flutter/issues/131580 fixes https://github.com/flutter/flutter/issues/138259 https://github.com/flutter/flutter/wiki/Tree-hygiene#overview [Tree Hygiene]: https://github.com/flutter/flutter/wiki/Tree-hygiene [test-exempt]: https://github.com/flutter/flutter/wiki/Tree-hygiene#tests [Flutter Style Guide]: https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo [C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style [testing the engine]: https://github.com/flutter/flutter/wiki/Testing-the-engine [CLA]: https://cla.developers.google.com/ https://github.com/flutter/flutter/wiki/Tree-hygiene#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/wiki/Chat