Fix 'ImageFilter.shader can be applied to canvas operations' test#180929
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This pull request addresses a failing test, 'ImageFilter.shader can be applied to canvas operations'. The changes re-enable the previously disabled test and correct its logic. The fix involves two key parts: correctly parsing the RGBA byte data from the output image into a Color object, and updating the expected color value from green to blue, which is the correct result of the channel-swapping shader. The changes are accurate and improve the test suite's correctness.
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| @@ -559,9 +554,16 @@ void main() async { | |||
| ); | |||
| final Image image = await recorder.endRecording().toImage(1, 1); | |||
| final ByteData data = (await image.toByteData())!; | |||
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nit: add explicit pixel format to make test easier to read.
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| colorComponentsRGBA[1], | ||
| colorComponentsRGBA[2], | ||
| ); | ||
| expect(color, const Color(0xFF0000FF)); |
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It doesn't hurt to add a comment here that blue is expected because filter_shader.frag.iplr swaps the red and the blue channel.
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autosubmit label was removed for flutter/flutter/180929, because - The status or check suite Linux linux_web_engine_tests has failed. Please fix the issues identified (or deflake) before re-applying this label. |
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…utter#180929) The test draws a red pixel onto a canvas with an ImageFilter that swaps colors channels with `frag_color = texture(u_texture, FlutterFragCoord().xy / u_size).bgra;`. This PR fixes two things: - When reading the output color, we can't construct a `Color` directly from the byte data. The byte data is RGBA. But the `Color` int constructor takes ARGB. So this was incorrectly reading the output color. Instead, read the RGBA components individually and use them to construct a color with `Color.fromARGB`. - The input color red, when given to the color-swapping `bgra` shader, outputs blue (0xFF0000FF), not green (0xFF00FF00). Fixes flutter#180927 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. **Note**: The Flutter team is currently trialing the use of [Gemini Code Assist for GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code). Comments from the `gemini-code-assist` bot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
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…utter#180929) The test draws a red pixel onto a canvas with an ImageFilter that swaps colors channels with `frag_color = texture(u_texture, FlutterFragCoord().xy / u_size).bgra;`. This PR fixes two things: - When reading the output color, we can't construct a `Color` directly from the byte data. The byte data is RGBA. But the `Color` int constructor takes ARGB. So this was incorrectly reading the output color. Instead, read the RGBA components individually and use them to construct a color with `Color.fromARGB`. - The input color red, when given to the color-swapping `bgra` shader, outputs blue (0xFF0000FF), not green (0xFF00FF00). Fixes flutter#180927 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. **Note**: The Flutter team is currently trialing the use of [Gemini Code Assist for GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code). Comments from the `gemini-code-assist` bot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
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The test draws a red pixel onto a canvas with an ImageFilter that swaps colors channels with
frag_color = texture(u_texture, FlutterFragCoord().xy / u_size).bgra;.This PR fixes two things:
Colordirectly from the byte data. The byte data is RGBA. But theColorint constructor takes ARGB. So this was incorrectly reading the output color. Instead, read the RGBA components individually and use them to construct a color withColor.fromARGB.bgrashader, outputs blue (0xFF0000FF), not green (0xFF00FF00).Fixes #180927
Pre-launch Checklist
///).If you need help, consider asking for advice on the #hackers-new channel on Discord.
Note: The Flutter team is currently trialing the use of Gemini Code Assist for GitHub. Comments from the
gemini-code-assistbot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed.