Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: ccbeb1e341f13f05bf4167f0f7253d8d87383da0
https://github.com/WebKit/WebKit/commit/ccbeb1e341f13f05bf4167f0f7253d8d87383da0
Author: Simon Fraser <[email protected]>
Date: 2023-04-28 (Fri, 28 Apr 2023)
Changed paths:
A LayoutTests/fast/css/background-clip-text-hairline-expected.html
A LayoutTests/fast/css/background-clip-text-hairline.html
M Source/WebCore/rendering/BackgroundPainter.cpp
Log Message:
-----------
Hairline pixel crack around background-clip: text
https://bugs.webkit.org/show_bug.cgi?id=179333
rdar://54325642
Reviewed by Alan Baradlay.
When there is some non-integral transform (or a non axis-aligned transform) in
the CTM, we could
show some antialiasing noise at the edge of `background-clip: text` regions.
This noise was not
in the buffer used as a mask, but seemed to come from some the transparency
layer operations.
We can work around it by inflating maskRect by a pixel on each size, which pads
the intermediate
buffer, and the size of the transparency layer.
* LayoutTests/fast/css/background-clip-text-hairline-expected.html: Added.
* LayoutTests/fast/css/background-clip-text-hairline.html: Added.
* Source/WebCore/rendering/BackgroundPainter.cpp:
(WebCore::BackgroundPainter::paintFillLayer):
Canonical link: https://commits.webkit.org/263526@main
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