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[web] Fix origin for repeated linear gradients #24354

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merged 9 commits into from
Feb 17, 2021
Merged

[web] Fix origin for repeated linear gradients #24354

merged 9 commits into from
Feb 17, 2021

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ferhatb
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@ferhatb ferhatb commented Feb 11, 2021

This PR fixes the origin of repeated linear gradients. A prior attempt at problem was #23691. However it centered the gradient incorrectly at mid point of from/to vector instead of center of shader bounds. This PR removes the shiftOrigin special case and instead fixes the gl_FragCoord matrix.

flutter/flutter#74137

Added new test case in gradient_golden_test.dart

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@ferhatb ferhatb requested a review from yjbanov February 11, 2021 21:07
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yjbanov approved these changes Feb 11, 2021
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lgtm

@chinmaygarde chinmaygarde added the platform-web Code specifically for the web engine label Feb 11, 2021
@ferhatb ferhatb added the waiting for tree to go green This PR is approved and tested, but waiting for the tree to be green to land. label Feb 17, 2021
@ferhatb ferhatb merged commit 3bd0e68 into flutter:master Feb 17, 2021
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
24cd689 
…e#24354)
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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…e#24354)
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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…e#24354)
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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…e#24354)
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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…e#24354)
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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…e#24354)
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3bd0e68 [web] Fix origin for repeated linear gradients (flutter/engin…
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…e#24354)
hjfreyer pushed a commit to hjfreyer/engine that referenced this pull request Mar 22, 2021
@ferhatb @hjfreyer
[web] Fix origin for repeated linear gradients (flutter#24354)
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