[Webkit-unassigned] [Bug 156039] New: putImageData leaves visible artifacts on retina display
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Wed Mar 30 13:30:18 PDT 2016
https://bugs.webkit.org/show_bug.cgi?id=156039
Bug ID: 156039
Summary: putImageData leaves visible artifacts on retina
display
Classification: Unclassified
Product: WebKit
Version: WebKit Nightly Build
Hardware: All
OS: All
Status: NEW
Severity: Normal
Priority: P2
Component: Canvas
Assignee: webkit-unassigned at lists.webkit.org
Reporter: bert at freudenbergs.de
CC: dino at apple.com
On a retina display, putImageData leaves gribblies around the affected area's border. Changing the page zoom clears these artifacts, proving that the actual canvas content is correct.
To reproduce I have isolated a simple test case here:
http://bertfreudenberg.github.io/SqueakJS/test/putImageData.html
In production this manifests e.g. when trying to move a window here:
https://bertfreudenberg.github.io/SqueakJS/demo/simple.html
Note that the gribblies do not show up when using pixelated image-rendering:
https://bertfreudenberg.github.io/SqueakJS/demo/simple.html#pixelated
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