Work around FreeType 2.12 issue with glyph metrics when using SVG-in-OT fonts
Categories
(Core :: Graphics: Text, defect)
Tracking
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| Tracking | Status | |
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| firefox102 | --- | fixed |
People
(Reporter: jfkthame, Assigned: jfkthame)
References
Details
Attachments
(1 file)
This was discovered while trying to update our in-tree FreeType lib (used on Android) to 2.12 in bug 1768944, but will also affect desktop Linux users where the system FreeType is updated to 2.12 or later.
See https://gitlab.freedesktop.org/freetype/freetype/-/issues/1156 for the underlying issue, which I believe should be fixed upstream; but in the meantime, we can work around it by disabling the FT_LOAD_COLOR flag when getting glyph metrics.
We also need a small patch in Skia to avoid hitting an assertion in debug builds when encountering the new FT_GLYPH_FORMAT_SVG format. (The fact that such glyphs are not actually supported for rendering in our Skia version doesn't matter, because we handle the rendering separately in thebes.)
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Assignee | |
Comment 1•2 years ago
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See https://gitlab.freedesktop.org/freetype/freetype/-/issues/1156
for the issue this is addressing.
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Updated•2 years ago
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Pushed by jkew@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/180486faa9c3 Disable FT_LOAD_COLOR when getting glyph metrics for fonts that include an SVG table. r=lsalzman
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Comment 3•2 years ago
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| bugherder | ||
Description
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