diff options
| author | Samuel Rødal <sroedal@trolltech.com> | 2009-05-07 16:07:47 +0200 |
|---|---|---|
| committer | Samuel Rødal <sroedal@trolltech.com> | 2009-05-08 15:34:33 +0200 |
| commit | b21210d646f4aaa639fa480ddf1c8e5fcd9b0572 (patch) | |
| tree | a9bbf36a2329ac8161712bccf12fda0ac99476a2 | |
| parent | 0ba839d4587a40a8af31c8233213da216002706e (diff) | |
Prevented asynchronous access to non-thread safe libfontconfig API.
We need to protect calls to FcCharSetHasChar with the font database
mutex.
Task-number: 241361
Reviewed-by: Simon Hausmann
| -rw-r--r-- | src/gui/text/qfontengine_ft.cpp | 43 |
1 files changed, 32 insertions, 11 deletions
diff --git a/src/gui/text/qfontengine_ft.cpp b/src/gui/text/qfontengine_ft.cpp index de03a3c29f..7a236fd506 100644 --- a/src/gui/text/qfontengine_ft.cpp +++ b/src/gui/text/qfontengine_ft.cpp @@ -1521,6 +1521,11 @@ bool QFontEngineFT::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs return false; } +#if !defined(QT_NO_FONTCONFIG) + extern QMutex *qt_fontdatabase_mutex(); + QMutex *mtx = 0; +#endif + bool mirrored = flags & QTextEngine::RightToLeft; int glyph_pos = 0; if (freetype->symbol_map) { @@ -1533,6 +1538,11 @@ bool QFontEngineFT::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs if ( !glyphs->glyphs[glyph_pos] ) { glyph_t glyph; #if !defined(QT_NO_FONTCONFIG) + if (!mtx) { + mtx = qt_fontdatabase_mutex(); + mtx->lock(); + } + if (FcCharSetHasChar(freetype->charset, uc)) { #else if (false) { @@ -1561,20 +1571,26 @@ bool QFontEngineFT::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs if (mirrored) uc = QChar::mirroredChar(uc); glyphs->glyphs[glyph_pos] = uc < QFreetypeFace::cmapCacheSize ? freetype->cmapCache[uc] : 0; - if (!glyphs->glyphs[glyph_pos] + if (!glyphs->glyphs[glyph_pos]) { #if !defined(QT_NO_FONTCONFIG) - && FcCharSetHasChar(freetype->charset, uc) + if (!mtx) { + mtx = qt_fontdatabase_mutex(); + mtx->lock(); + } + + if (FcCharSetHasChar(freetype->charset, uc)) #endif - ) { - redo: - glyph_t glyph = FT_Get_Char_Index(face, uc); - if (!glyph && (uc == 0xa0 || uc == 0x9)) { - uc = 0x20; - goto redo; + { + redo: + glyph_t glyph = FT_Get_Char_Index(face, uc); + if (!glyph && (uc == 0xa0 || uc == 0x9)) { + uc = 0x20; + goto redo; + } + glyphs->glyphs[glyph_pos] = glyph; + if (uc < QFreetypeFace::cmapCacheSize) + freetype->cmapCache[uc] = glyph; } - glyphs->glyphs[glyph_pos] = glyph; - if (uc < QFreetypeFace::cmapCacheSize) - freetype->cmapCache[uc] = glyph; } ++glyph_pos; } @@ -1583,6 +1599,11 @@ bool QFontEngineFT::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs *nglyphs = glyph_pos; glyphs->numGlyphs = glyph_pos; +#if !defined(QT_NO_FONTCONFIG) + if (mtx) + mtx->unlock(); +#endif + if (flags & QTextEngine::GlyphIndicesOnly) return true; |