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| author | Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io> | 2020-10-19 10:01:04 +0200 |
|---|---|---|
| committer | Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io> | 2020-10-19 11:52:07 +0200 |
| commit | 05078459de5dae65b9bb7cf2a1bc216528291648 (patch) | |
| tree | b35cab129d448541680755356e4ce09a8196a05b /src/gui/text/qtextdocument_p.h | |
| parent | 2ffbac7cb2f16ab350d203a12a86535772d1c578 (diff) | |
Use valid glyph index for box font engine
Glyph index 0 is reserved for "glyph not found", which can
confuse Harfbuzz. For QFontEngineBox we always return a valid
glyph since it is the fallback font when no other fonts are
available.
Symptom of issue was that we could get to Q_UNREACHABLE for
certain strings when Harfbuzz returned a glyph count of 0.
[ChangeLog][QtGui] Fixed a potential crash when rendering text
with an empty font database.
Fixes: QTBUG-85016
Pick-to: 5.15
Change-Id: Iaf1d003cdff57320bf4327aa8e63dffd9d1da82c
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Diffstat (limited to 'src/gui/text/qtextdocument_p.h')
0 files changed, 0 insertions, 0 deletions