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Reduces shader count slightly, and reduces duplication of source code for vertex stages that are identical.

Part of flutter/flutter#143540

TextureFillStrictSrcFragmentShader>;
using TiledTexturePipeline =
RenderPipelineHandle<TextureUvFillVertexShader,
TiledTextureFillFragmentShader>;
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Changes here is the gaussian, morph, and border mask filters all have identical vertex stages so they can share them now.

Likewise, vertices_uber and porter duff have identical vertex stages.

Also we don't need two gaussians, only ever need one.

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Everything thing looks good. I think now that we have this setup as an example it will hopefully reduce future pipeline bloat.

We should keep the kernel.glsl filename though to promote shader resuse. Renaming all of the typedefs Kernel->Gaussian sounds good to me though.

#include <impeller/gaussian.glsl>
#include <impeller/texture.glsl>
#include <impeller/types.glsl>

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We should keep the name of this file as kernel.glsl since our goal is to minimize the number of shaders and this shader isn't specific to gaussian blur.

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i'd argue we could pursue that if we have a use for that, but until then YAGNI

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There's nothing to pursue, it's already in a good state, just undo the changes =) Had we named our shaders based on what they do versus what they are used for in the past we may not have had to do all this cleanup now.

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Its only used for a gaussian blur, the name is more correct

@jonahwilliams jonahwilliams requested a review from gaaclarke April 24, 2024 17:54
@jonahwilliams jonahwilliams added the autosubmit Merge PR when tree becomes green via auto submit App label Apr 24, 2024
@auto-submit auto-submit bot merged commit cac3b87 into flutter:main Apr 24, 2024
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Apr 24, 2024
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Apr 24, 2024
auto-submit bot pushed a commit to flutter/flutter that referenced this pull request Apr 24, 2024
…147336)

flutter/engine@b5d5832...b30c0a7

2024-04-24 15619084+vashworth@users.noreply.github.com Remove UIAccessibilityTraitKeyboardKey to fix touch typing (flutter/engine#52333)
2024-04-24 bdero@google.com [Impeller] Remove libtess2 from libflutter. (flutter/engine#52357)
2024-04-24 skia-flutter-autoroll@skia.org Roll Skia from 510b6766d907 to afcc1db27593 (2 revisions) (flutter/engine#52367)
2024-04-24 yjbanov@google.com [web:tests] switch to new HTML DOM matcher (flutter/engine#52354)
2024-04-24 jonahwilliams@google.com [Impeller] use spec constant for gaussian shader, rename, and reuse vertex sources. (flutter/engine#52361)
2024-04-24 jonahwilliams@google.com [Impeller] delete points compute shader. (flutter/engine#52346)
2024-04-24 byoungchan.lee@gmx.com [darwin] Update pixel format handling in FlutterTexture (flutter/engine#52326)
2024-04-24 jonahwilliams@google.com [Impeller] make drawAtlas always use porterduff or vertices_uber shader (flutter/engine#52348)
2024-04-24 magder@google.com Migrate ios_surface files to ARC (flutter/engine#52139)
2024-04-24 skia-flutter-autoroll@skia.org Roll Dart SDK from f470eaaf6e6d to 38c43a01a51e (1 revision) (flutter/engine#52365)
2024-04-24 skia-flutter-autoroll@skia.org Roll Skia from b5dd23bd29df to 510b6766d907 (16 revisions) (flutter/engine#52364)
2024-04-24 jason-simmons@users.noreply.github.com Fix some warnings reported by recent versions of clang-tidy (flutter/engine#52349)
2024-04-24 skia-flutter-autoroll@skia.org Roll Skia from e15464e6e982 to b5dd23bd29df (1 revision) (flutter/engine#52353)
2024-04-24 skia-flutter-autoroll@skia.org Roll Dart SDK from 5227dc5103f6 to f470eaaf6e6d (1 revision) (flutter/engine#52359)

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