RESOLVED CONFIGURATION CHANGED 200532
Applying a css matrix3d transform to an SVG containing a mask breaks the mask
https://bugs.webkit.org/show_bug.cgi?id=200532
Summary Applying a css matrix3d transform to an SVG containing a mask breaks the mask
Michael Markowski
Reported 2019-08-08 01:51:22 PDT
Created attachment 375790 [details] Screenshot of Safari showing the bug The following example contains an SVG consisting of a JPEG with a luminance mask (also JPEG). Using this technique, images that contain alpha channels can be dramatically reduced in size. The bug prevents this method to be used in conjunction with animations or layouting (rotation). When switching between matrix and matrix3d transforms, especially rotation, the SVG mask gets messed up. When applying an identity matrix3d before transforming it, it renders fine. Though, resizing the window after a successful 3D transform, it breaks again. See this codepen for further explanation and an example: https://codepen.io/artifacts/full/ZgaMrZ The attached screenshots show chrome (works) and Safari (fails). Workaround (flickering): - Always apply an identity matrix3d on elements that should be rotated - Attach a resize handler to the window - On resize, stash the element's matrix3d, hide the element, apply transform:none, apply an identity matrix3d, re-apply the element's matrix3d transform
Attachments
Screenshot of Safari showing the bug (560.24 KB, image/png)
2019-08-08 01:51 PDT, Michael Markowski
no flags
Screenshot showing chrome rendering correctly (557.48 KB, image/png)
2019-08-08 01:52 PDT, Michael Markowski
no flags
reduced test case (1.04 KB, text/html)
2019-08-08 10:40 PDT, Said Abou-Hallawa
no flags
Michael Markowski
Comment 1 2019-08-08 01:52:11 PDT
Created attachment 375792 [details] Screenshot showing chrome rendering correctly
Said Abou-Hallawa
Comment 2 2019-08-08 10:39:40 PDT
The bug can be reproduced with simple SVG masks which is not necessarily related to images. See the attached reduced test case.
Said Abou-Hallawa
Comment 3 2019-08-08 10:40:09 PDT
Created attachment 375816 [details] reduced test case
Radar WebKit Bug Importer
Comment 4 2019-08-08 10:41:06 PDT
Ahmad Saleem
Comment 5 2024-05-20 15:25:18 PDT
@Said - I am unable to reproduce this using your 'reduced' test case and it matches Chrome Canary 127 and Firefox Nightly 128. @Karl - can you double check?
Karl Dubost
Comment 6 2024-05-20 17:45:39 PDT
This is working the same everywhere now.
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