[Impeller] optimize drawImageRect with blend and matrix color filter. #165998
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Draft because I don't think my math is quite right yet. |
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Thinking about this some more, I'd think our existing optimizations would cover this case - but actually they seem to be falling down. Investigating more. |
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So in theory our snapshot optimization handles this - however we don't handle a src/dst rect that are different sizes. Since this is really only an improvement for blend/matrix color filters, I think it makes more sense to add the optimization in canvas than it does to refactor the snapshot system. |
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Code looks good to me, the goldens don't look alright though. Check out impeller_Play_AiksTest_ColorFilterBlend_Metal.
| paint.image_filter == nullptr && // | ||
| !paint.mask_blur_descriptor.has_value() && // | ||
| IsPipelineBlendOrMatrixFilter(paint.color_filter)) { | ||
| if (paint.color_filter->type() == flutter::DlColorFilterType::kBlend) { |
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nit: This method is huge, can you split this out into it's own function.
| // we should swap out the shader for the porter duff blend shader and avoid a | ||
| // saveLayer. This can only be done for imageRects without a strict source | ||
| // rect, as the porter duff shader does not support this feature. This | ||
| // optimization is important for flame. |
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| // optimization is important for flame. | |
| // optimization is important for Flame. |
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| ///// | ||
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| class ColorFilterAtlasContents final : public Contents { |
| RenderPass& pass) const override; | ||
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| private: | ||
| AtlasGeometry* geometry_ = nullptr; |
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Add comment why raw pointer can't result in a dangling pointer.
engine/src/flutter/impeller/entity/shaders/filters/color_matrix_color_filter.frag
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…x_color_filter.frag Co-authored-by: gaaclarke <[email protected]>
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lgtm as long as the goldens are good.
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Manual roll Flutter from 1d954f4 to 05b5e79 (225 revisions) Manual roll requested by [email protected] flutter/flutter@1d954f4...05b5e79 2025-03-29 [email protected] Roll Dart SDK from bcb7649e965a to b9c35e05feb5 (1 revision) (flutter/flutter#166202) 2025-03-29 [email protected] Roll Dart SDK from a7701559f616 to bcb7649e965a (1 revision) (flutter/flutter#166189) 2025-03-29 [email protected] Roll Dart SDK from 30ea8c4e622f to a7701559f616 (1 revision) (flutter/flutter#166185) 2025-03-29 [email protected] [fuchsia][sysmem2] switch to sysmem2 tokens (flutter/flutter#166120) 2025-03-29 [email protected] Roll Dart SDK from 65fe9906a916 to 30ea8c4e622f (2 revisions) (flutter/flutter#166181) 2025-03-29 [email protected] move around shaders in vertices uber 1/2 (flutter/flutter#166180) 2025-03-29 [email protected] [Impeller] optimize drawImageRect with blend and matrix color filter. (flutter/flutter#165998) 2025-03-28 [email protected] Add drawRSuperellipse support to mock_canvas. (flutter/flutter#165744) 2025-03-28 [email protected] Started clamping scaled antialias lines size (flutter/flutter#166149) 2025-03-28 [email protected] Roll Dart SDK from 4494ffead9af to 65fe9906a916 (7 revisions) (flutter/flutter#166162) 2025-03-28 [email protected] Remove bringup flag for customer tests (flutter/flutter#166161) 2025-03-28 [email protected] Add the ios-reviewers review team (flutter/flutter#166034) 2025-03-28 [email protected] [impeller] refactored LineContents to make it more testable, added tests (flutter/flutter#166035) 2025-03-28 [email protected] [Widget Inspector] Jump to source code of implementation widgets from Flutter Inspector (flutter/flutter#165924) 2025-03-28 [email protected] Make sure `LayoutBuilder` rebuild in an inactive route (flutter/flutter#154681) 2025-03-28 [email protected] [Impeller] allow newer powervr gpu to use Vulkan. (flutter/flutter#165520) 2025-03-28 [email protected] [web] Remove package:js in favor of dart:js_interop (flutter/flutter#165324) 2025-03-28 [email protected] [ Widget Previews ] Default to using Flutter Web for the widget preview environment (flutter/flutter#166091) 2025-03-28 [email protected] Mark Linux coverage as bringup (flutter/flutter#166144) 2025-03-28 [email protected] Roll Fuchsia Linux SDK from djUjSTaAtl0ETQSBR... to v7PGvypiiWLO8PbsZ... (flutter/flutter#166136) 2025-03-28 [email protected] [Impeller] split vertices uber into 2 shaders. (flutter/flutter#165938) 2025-03-28 [email protected] [flutter_tools] Fix VS Code package.json path on macOS with case-sensitive file system (flutter/flutter#163409) 2025-03-28 [email protected] Delete some verbose vm service logging (flutter/flutter#162709) 2025-03-28 [email protected] Get analytics welcome message under test (flutter/flutter#162627) 2025-03-28 [email protected] [ios][pv]fully revert the UIScreen.main deprecated API change (flutter/flutter#166080) 2025-03-28 [email protected] Roll Skia from b5b6f29d690f to 10f4cf9a817d (8 revisions) (flutter/flutter#166111) 2025-03-28 [email protected] [CI] remove check for exact golden files. (flutter/flutter#166031) 2025-03-28 [email protected] Move OpenGL context management to FlOpenGLManager (flutter/flutter#166025) 2025-03-27 [email protected] [android] only release background image readers on Android 14. (flutter/flutter#165942) 2025-03-27 [email protected] Refactor: Migrate Date picker from MaterialState and MaterialStateProperty (flutter/flutter#164972) 2025-03-27 [email protected] Mark Linux customer tests as flaky (flutter/flutter#166103) 2025-03-27 [email protected] Move app link settings task configuration to kotlin (flutter/flutter#165819) 2025-03-27 [email protected] Make iOS Flutter framework extension-safe (flutter/flutter#165346) 2025-03-27 [email protected] [ Widget Preview ] Display an error widget when an exception is thrown while defining the widget tree (flutter/flutter#166005) 2025-03-27 [email protected] Removed not working hyperlinks to ScriptCategory values (flutter/flutter#165395) 2025-03-27 [email protected] add PointerDeviceKind to ScaleStartDetails (flutter/flutter#165096) 2025-03-27 [email protected] Fix build_android_host_app_with_module_source device lab tests (flutter/flutter#166077) 2025-03-27 [email protected] Roll Skia from 11375a498f6b to b5b6f29d690f (4 revisions) (flutter/flutter#166060) 2025-03-27 [email protected] [Impeller] Move to the new location before rendering a stroke path contour containing only one point (flutter/flutter#165940) 2025-03-27 [email protected] Scale aa lines (flutter/flutter#165917) 2025-03-27 [email protected] Reapply "[ Device Lab ] Upgrade Device Lab projects to Java 18" (#166016) (flutter/flutter#166059) 2025-03-27 [email protected] Roll Fuchsia Linux SDK from iScQOaYHg2aJcF1LX... to djUjSTaAtl0ETQSBR... (flutter/flutter#166055) 2025-03-27 [email protected] Roll Skia from 67a236832d64 to 11375a498f6b (2 revisions) (flutter/flutter#166046) 2025-03-27 [email protected] [flutter_tool] Handle RPCErrorKind.kConnectionDisposed (flutter/flutter#164299) ...
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… (#8960) Manual roll Flutter from 1d954f4e96bd to 05b5e7910544 (225 revisions) Manual roll requested by [email protected] flutter/flutter@1d954f4...05b5e79 2025-03-29 [email protected] Roll Dart SDK from bcb7649e965a to b9c35e05feb5 (1 revision) (flutter/flutter#166202) 2025-03-29 [email protected] Roll Dart SDK from a7701559f616 to bcb7649e965a (1 revision) (flutter/flutter#166189) 2025-03-29 [email protected] Roll Dart SDK from 30ea8c4e622f to a7701559f616 (1 revision) (flutter/flutter#166185) 2025-03-29 [email protected] [fuchsia][sysmem2] switch to sysmem2 tokens (flutter/flutter#166120) 2025-03-29 [email protected] Roll Dart SDK from 65fe9906a916 to 30ea8c4e622f (2 revisions) (flutter/flutter#166181) 2025-03-29 [email protected] move around shaders in vertices uber 1/2 (flutter/flutter#166180) 2025-03-29 [email protected] [Impeller] optimize drawImageRect with blend and matrix color filter. (flutter/flutter#165998) 2025-03-28 [email protected] Add drawRSuperellipse support to mock_canvas. (flutter/flutter#165744) 2025-03-28 [email protected] Started clamping scaled antialias lines size (flutter/flutter#166149) 2025-03-28 [email protected] Roll Dart SDK from 4494ffead9af to 65fe9906a916 (7 revisions) (flutter/flutter#166162) 2025-03-28 [email protected] Remove bringup flag for customer tests (flutter/flutter#166161) 2025-03-28 [email protected] Add the ios-reviewers review team (flutter/flutter#166034) 2025-03-28 [email protected] [impeller] refactored LineContents to make it more testable, added tests (flutter/flutter#166035) 2025-03-28 [email protected] [Widget Inspector] Jump to source code of implementation widgets from Flutter Inspector (flutter/flutter#165924) 2025-03-28 [email protected] Make sure `LayoutBuilder` rebuild in an inactive route (flutter/flutter#154681) 2025-03-28 [email protected] [Impeller] allow newer powervr gpu to use Vulkan. (flutter/flutter#165520) 2025-03-28 [email protected] [web] Remove package:js in favor of dart:js_interop (flutter/flutter#165324) 2025-03-28 [email protected] [ Widget Previews ] Default to using Flutter Web for the widget preview environment (flutter/flutter#166091) 2025-03-28 [email protected] Mark Linux coverage as bringup (flutter/flutter#166144) 2025-03-28 [email protected] Roll Fuchsia Linux SDK from djUjSTaAtl0ETQSBR... to v7PGvypiiWLO8PbsZ... (flutter/flutter#166136) 2025-03-28 [email protected] [Impeller] split vertices uber into 2 shaders. (flutter/flutter#165938) 2025-03-28 [email protected] [flutter_tools] Fix VS Code package.json path on macOS with case-sensitive file system (flutter/flutter#163409) 2025-03-28 [email protected] Delete some verbose vm service logging (flutter/flutter#162709) 2025-03-28 [email protected] Get analytics welcome message under test (flutter/flutter#162627) 2025-03-28 [email protected] [ios][pv]fully revert the UIScreen.main deprecated API change (flutter/flutter#166080) 2025-03-28 [email protected] Roll Skia from b5b6f29d690f to 10f4cf9a817d (8 revisions) (flutter/flutter#166111) 2025-03-28 [email protected] [CI] remove check for exact golden files. (flutter/flutter#166031) 2025-03-28 [email protected] Move OpenGL context management to FlOpenGLManager (flutter/flutter#166025) 2025-03-27 [email protected] [android] only release background image readers on Android 14. (flutter/flutter#165942) 2025-03-27 [email protected] Refactor: Migrate Date picker from MaterialState and MaterialStateProperty (flutter/flutter#164972) 2025-03-27 [email protected] Mark Linux customer tests as flaky (flutter/flutter#166103) 2025-03-27 [email protected] Move app link settings task configuration to kotlin (flutter/flutter#165819) 2025-03-27 [email protected] Make iOS Flutter framework extension-safe (flutter/flutter#165346) 2025-03-27 [email protected] [ Widget Preview ] Display an error widget when an exception is thrown while defining the widget tree (flutter/flutter#166005) 2025-03-27 [email protected] Removed not working hyperlinks to ScriptCategory values (flutter/flutter#165395) 2025-03-27 [email protected] add PointerDeviceKind to ScaleStartDetails (flutter/flutter#165096) 2025-03-27 [email protected] Fix build_android_host_app_with_module_source device lab tests (flutter/flutter#166077) 2025-03-27 [email protected] Roll Skia from 11375a498f6b to b5b6f29d690f (4 revisions) (flutter/flutter#166060) 2025-03-27 [email protected] [Impeller] Move to the new location before rendering a stroke path contour containing only one point (flutter/flutter#165940) 2025-03-27 [email protected] Scale aa lines (flutter/flutter#165917) 2025-03-27 [email protected] Reapply "[ Device Lab ] Upgrade Device Lab projects to Java 18" (#166016) (flutter/flutter#166059) 2025-03-27 [email protected] Roll Fuchsia Linux SDK from iScQOaYHg2aJcF1LX... to djUjSTaAtl0ETQSBR... (flutter/flutter#166055) 2025-03-27 [email protected] Roll Skia from 67a236832d64 to 11375a498f6b (2 revisions) (flutter/flutter#166046) 2025-03-27 [email protected] [flutter_tool] Handle RPCErrorKind.kConnectionDisposed (flutter/flutter#164299) ...
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…8960) Manual roll Flutter from 1d954f4 to 05b5e79 (225 revisions) Manual roll requested by [email protected] flutter/flutter@1d954f4...05b5e79 2025-03-29 [email protected] Roll Dart SDK from bcb7649e965a to b9c35e05feb5 (1 revision) (flutter/flutter#166202) 2025-03-29 [email protected] Roll Dart SDK from a7701559f616 to bcb7649e965a (1 revision) (flutter/flutter#166189) 2025-03-29 [email protected] Roll Dart SDK from 30ea8c4e622f to a7701559f616 (1 revision) (flutter/flutter#166185) 2025-03-29 [email protected] [fuchsia][sysmem2] switch to sysmem2 tokens (flutter/flutter#166120) 2025-03-29 [email protected] Roll Dart SDK from 65fe9906a916 to 30ea8c4e622f (2 revisions) (flutter/flutter#166181) 2025-03-29 [email protected] move around shaders in vertices uber 1/2 (flutter/flutter#166180) 2025-03-29 [email protected] [Impeller] optimize drawImageRect with blend and matrix color filter. (flutter/flutter#165998) 2025-03-28 [email protected] Add drawRSuperellipse support to mock_canvas. (flutter/flutter#165744) 2025-03-28 [email protected] Started clamping scaled antialias lines size (flutter/flutter#166149) 2025-03-28 [email protected] Roll Dart SDK from 4494ffead9af to 65fe9906a916 (7 revisions) (flutter/flutter#166162) 2025-03-28 [email protected] Remove bringup flag for customer tests (flutter/flutter#166161) 2025-03-28 [email protected] Add the ios-reviewers review team (flutter/flutter#166034) 2025-03-28 [email protected] [impeller] refactored LineContents to make it more testable, added tests (flutter/flutter#166035) 2025-03-28 [email protected] [Widget Inspector] Jump to source code of implementation widgets from Flutter Inspector (flutter/flutter#165924) 2025-03-28 [email protected] Make sure `LayoutBuilder` rebuild in an inactive route (flutter/flutter#154681) 2025-03-28 [email protected] [Impeller] allow newer powervr gpu to use Vulkan. (flutter/flutter#165520) 2025-03-28 [email protected] [web] Remove package:js in favor of dart:js_interop (flutter/flutter#165324) 2025-03-28 [email protected] [ Widget Previews ] Default to using Flutter Web for the widget preview environment (flutter/flutter#166091) 2025-03-28 [email protected] Mark Linux coverage as bringup (flutter/flutter#166144) 2025-03-28 [email protected] Roll Fuchsia Linux SDK from djUjSTaAtl0ETQSBR... to v7PGvypiiWLO8PbsZ... (flutter/flutter#166136) 2025-03-28 [email protected] [Impeller] split vertices uber into 2 shaders. (flutter/flutter#165938) 2025-03-28 [email protected] [flutter_tools] Fix VS Code package.json path on macOS with case-sensitive file system (flutter/flutter#163409) 2025-03-28 [email protected] Delete some verbose vm service logging (flutter/flutter#162709) 2025-03-28 [email protected] Get analytics welcome message under test (flutter/flutter#162627) 2025-03-28 [email protected] [ios][pv]fully revert the UIScreen.main deprecated API change (flutter/flutter#166080) 2025-03-28 [email protected] Roll Skia from b5b6f29d690f to 10f4cf9a817d (8 revisions) (flutter/flutter#166111) 2025-03-28 [email protected] [CI] remove check for exact golden files. (flutter/flutter#166031) 2025-03-28 [email protected] Move OpenGL context management to FlOpenGLManager (flutter/flutter#166025) 2025-03-27 [email protected] [android] only release background image readers on Android 14. (flutter/flutter#165942) 2025-03-27 [email protected] Refactor: Migrate Date picker from MaterialState and MaterialStateProperty (flutter/flutter#164972) 2025-03-27 [email protected] Mark Linux customer tests as flaky (flutter/flutter#166103) 2025-03-27 [email protected] Move app link settings task configuration to kotlin (flutter/flutter#165819) 2025-03-27 [email protected] Make iOS Flutter framework extension-safe (flutter/flutter#165346) 2025-03-27 [email protected] [ Widget Preview ] Display an error widget when an exception is thrown while defining the widget tree (flutter/flutter#166005) 2025-03-27 [email protected] Removed not working hyperlinks to ScriptCategory values (flutter/flutter#165395) 2025-03-27 [email protected] add PointerDeviceKind to ScaleStartDetails (flutter/flutter#165096) 2025-03-27 [email protected] Fix build_android_host_app_with_module_source device lab tests (flutter/flutter#166077) 2025-03-27 [email protected] Roll Skia from 11375a498f6b to b5b6f29d690f (4 revisions) (flutter/flutter#166060) 2025-03-27 [email protected] [Impeller] Move to the new location before rendering a stroke path contour containing only one point (flutter/flutter#165940) 2025-03-27 [email protected] Scale aa lines (flutter/flutter#165917) 2025-03-27 [email protected] Reapply "[ Device Lab ] Upgrade Device Lab projects to Java 18" (#166016) (flutter/flutter#166059) 2025-03-27 [email protected] Roll Fuchsia Linux SDK from iScQOaYHg2aJcF1LX... to djUjSTaAtl0ETQSBR... (flutter/flutter#166055) 2025-03-27 [email protected] Roll Skia from 67a236832d64 to 11375a498f6b (2 revisions) (flutter/flutter#166046) 2025-03-27 [email protected] [flutter_tool] Handle RPCErrorKind.kConnectionDisposed (flutter/flutter#164299) ...
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…flutter#165998) Fixes flutter#165959 Flame uses a lot of individual calls to drawImageRect w/ blend color filters to color the sprites. This is much slower with Impeller today, because we convert this into: ``` saveLayer(color filter) drawImageRect restore ``` Instead, we can detect this case and convert to a call to drawAtlas. drawAtlas will use the porter-duff shader which removes the saveLayer entirely. We could do this optimization while recording, but for now its fine to do in dispatch. We do have a snapshot optimization that catches "normal" image usage, but it doesn't apply in the flame case as the source rects are sampling from a larger texture and we don't have a way to pass those through the snapshot system. ## Before <img src="https://github.com/user-attachments/assets/faada042-843f-4f15-af20-9baf862f66fd" width="200"/> ## After <img src="https://github.com/user-attachments/assets/c83e061c-190f-4613-a725-88e16b776c04" width="200"/> --------- Co-authored-by: gaaclarke <[email protected]>
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…8960) Manual roll Flutter from 1d954f4 to 05b5e79 (225 revisions) Manual roll requested by [email protected] flutter/flutter@1d954f4...05b5e79 2025-03-29 [email protected] Roll Dart SDK from bcb7649e965a to b9c35e05feb5 (1 revision) (flutter/flutter#166202) 2025-03-29 [email protected] Roll Dart SDK from a7701559f616 to bcb7649e965a (1 revision) (flutter/flutter#166189) 2025-03-29 [email protected] Roll Dart SDK from 30ea8c4e622f to a7701559f616 (1 revision) (flutter/flutter#166185) 2025-03-29 [email protected] [fuchsia][sysmem2] switch to sysmem2 tokens (flutter/flutter#166120) 2025-03-29 [email protected] Roll Dart SDK from 65fe9906a916 to 30ea8c4e622f (2 revisions) (flutter/flutter#166181) 2025-03-29 [email protected] move around shaders in vertices uber 1/2 (flutter/flutter#166180) 2025-03-29 [email protected] [Impeller] optimize drawImageRect with blend and matrix color filter. (flutter/flutter#165998) 2025-03-28 [email protected] Add drawRSuperellipse support to mock_canvas. (flutter/flutter#165744) 2025-03-28 [email protected] Started clamping scaled antialias lines size (flutter/flutter#166149) 2025-03-28 [email protected] Roll Dart SDK from 4494ffead9af to 65fe9906a916 (7 revisions) (flutter/flutter#166162) 2025-03-28 [email protected] Remove bringup flag for customer tests (flutter/flutter#166161) 2025-03-28 [email protected] Add the ios-reviewers review team (flutter/flutter#166034) 2025-03-28 [email protected] [impeller] refactored LineContents to make it more testable, added tests (flutter/flutter#166035) 2025-03-28 [email protected] [Widget Inspector] Jump to source code of implementation widgets from Flutter Inspector (flutter/flutter#165924) 2025-03-28 [email protected] Make sure `LayoutBuilder` rebuild in an inactive route (flutter/flutter#154681) 2025-03-28 [email protected] [Impeller] allow newer powervr gpu to use Vulkan. (flutter/flutter#165520) 2025-03-28 [email protected] [web] Remove package:js in favor of dart:js_interop (flutter/flutter#165324) 2025-03-28 [email protected] [ Widget Previews ] Default to using Flutter Web for the widget preview environment (flutter/flutter#166091) 2025-03-28 [email protected] Mark Linux coverage as bringup (flutter/flutter#166144) 2025-03-28 [email protected] Roll Fuchsia Linux SDK from djUjSTaAtl0ETQSBR... to v7PGvypiiWLO8PbsZ... (flutter/flutter#166136) 2025-03-28 [email protected] [Impeller] split vertices uber into 2 shaders. (flutter/flutter#165938) 2025-03-28 [email protected] [flutter_tools] Fix VS Code package.json path on macOS with case-sensitive file system (flutter/flutter#163409) 2025-03-28 [email protected] Delete some verbose vm service logging (flutter/flutter#162709) 2025-03-28 [email protected] Get analytics welcome message under test (flutter/flutter#162627) 2025-03-28 [email protected] [ios][pv]fully revert the UIScreen.main deprecated API change (flutter/flutter#166080) 2025-03-28 [email protected] Roll Skia from b5b6f29d690f to 10f4cf9a817d (8 revisions) (flutter/flutter#166111) 2025-03-28 [email protected] [CI] remove check for exact golden files. (flutter/flutter#166031) 2025-03-28 [email protected] Move OpenGL context management to FlOpenGLManager (flutter/flutter#166025) 2025-03-27 [email protected] [android] only release background image readers on Android 14. (flutter/flutter#165942) 2025-03-27 [email protected] Refactor: Migrate Date picker from MaterialState and MaterialStateProperty (flutter/flutter#164972) 2025-03-27 [email protected] Mark Linux customer tests as flaky (flutter/flutter#166103) 2025-03-27 [email protected] Move app link settings task configuration to kotlin (flutter/flutter#165819) 2025-03-27 [email protected] Make iOS Flutter framework extension-safe (flutter/flutter#165346) 2025-03-27 [email protected] [ Widget Preview ] Display an error widget when an exception is thrown while defining the widget tree (flutter/flutter#166005) 2025-03-27 [email protected] Removed not working hyperlinks to ScriptCategory values (flutter/flutter#165395) 2025-03-27 [email protected] add PointerDeviceKind to ScaleStartDetails (flutter/flutter#165096) 2025-03-27 [email protected] Fix build_android_host_app_with_module_source device lab tests (flutter/flutter#166077) 2025-03-27 [email protected] Roll Skia from 11375a498f6b to b5b6f29d690f (4 revisions) (flutter/flutter#166060) 2025-03-27 [email protected] [Impeller] Move to the new location before rendering a stroke path contour containing only one point (flutter/flutter#165940) 2025-03-27 [email protected] Scale aa lines (flutter/flutter#165917) 2025-03-27 [email protected] Reapply "[ Device Lab ] Upgrade Device Lab projects to Java 18" (#166016) (flutter/flutter#166059) 2025-03-27 [email protected] Roll Fuchsia Linux SDK from iScQOaYHg2aJcF1LX... to djUjSTaAtl0ETQSBR... (flutter/flutter#166055) 2025-03-27 [email protected] Roll Skia from 67a236832d64 to 11375a498f6b (2 revisions) (flutter/flutter#166046) 2025-03-27 [email protected] [flutter_tool] Handle RPCErrorKind.kConnectionDisposed (flutter/flutter#164299) ...
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…flutter#165998) Fixes flutter#165959 Flame uses a lot of individual calls to drawImageRect w/ blend color filters to color the sprites. This is much slower with Impeller today, because we convert this into: ``` saveLayer(color filter) drawImageRect restore ``` Instead, we can detect this case and convert to a call to drawAtlas. drawAtlas will use the porter-duff shader which removes the saveLayer entirely. We could do this optimization while recording, but for now its fine to do in dispatch. We do have a snapshot optimization that catches "normal" image usage, but it doesn't apply in the flame case as the source rects are sampling from a larger texture and we don't have a way to pass those through the snapshot system. ## Before <img src="https://github.com/user-attachments/assets/faada042-843f-4f15-af20-9baf862f66fd" width="200"/> ## After <img src="https://github.com/user-attachments/assets/c83e061c-190f-4613-a725-88e16b776c04" width="200"/> --------- Co-authored-by: gaaclarke <[email protected]>
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Fixes #165959
Flame uses a lot of individual calls to drawImageRect w/ blend color filters to color the sprites. This is much slower with Impeller today, because we convert this into:
Instead, we can detect this case and convert to a call to drawAtlas. drawAtlas will use the porter-duff shader which removes the saveLayer entirely. We could do this optimization while recording, but for now its fine to do in dispatch.
We do have a snapshot optimization that catches "normal" image usage, but it doesn't apply in the flame case as the source rects are sampling from a larger texture and we don't have a way to pass those through the snapshot system.
Before
After