Details
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Type:
Bug
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Status: Closed
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Priority:
P1: Critical
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Resolution: Done
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Affects Version/s: 5.9.3, 5.10.0
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Fix Version/s: 5.9.4
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Component/s: GUI: Font handling, WebKit
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Labels:None
Description
Patch https://codereview.qt-project.org/#/c/190803 (first released in Qt 5.9) introduced a regression in QtWebKit, which results in web fonts becoming invisible in QtWebKit on some pages (see attached screenshots). Web font is implemented as QRawFont object loaded from QByteArray. It was found, that replacing
fontData.toRawCFData()
with
fontData.toCFData()
in method
QCoreTextFontEngine::create(const QByteArray &, qreal, QFont::HintingPreference)
makes this bug disappear, which suggests there is an issue with life time management of the font data inside QtGui (QtWebKit operates on QRawFont public API and doesn't try to mess with fontengine internals)
It is not yet determined how to reproduce this bug outside of QtWebKit
Attachments
| For Gerrit Dashboard: QTBUG-65923 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 219035,4 | CoreText: Make sure to keep reference to data when cloning raw font engine | 5.9 | qt/qtbase | Status: MERGED | +2 | 0 |