diff options
| -rw-r--r-- | src/plugins/platforms/windows/qwindowsfontdatabase.cpp | 12 | ||||
| -rw-r--r-- | src/plugins/platforms/windows/qwindowsfontenginedirectwrite.cpp | 20 |
2 files changed, 24 insertions, 8 deletions
diff --git a/src/plugins/platforms/windows/qwindowsfontdatabase.cpp b/src/plugins/platforms/windows/qwindowsfontdatabase.cpp index 4f022141cf..1630b80306 100644 --- a/src/plugins/platforms/windows/qwindowsfontdatabase.cpp +++ b/src/plugins/platforms/windows/qwindowsfontdatabase.cpp @@ -110,13 +110,21 @@ static void createDirectWriteFactory(IDWriteFactory **factory) *factory = static_cast<IDWriteFactory *>(result); } -static inline bool useDirectWrite(QFont::HintingPreference hintingPreference, bool isColorFont = false) +static inline bool useDirectWrite(QFont::HintingPreference hintingPreference, + const QString &familyName = QString(), + bool isColorFont = false) { const unsigned options = QWindowsIntegration::instance()->options(); if (Q_UNLIKELY(options & QWindowsIntegration::DontUseDirectWriteFonts)) return false; if (isColorFont) return (options & QWindowsIntegration::DontUseColorFonts) == 0; + + // At some scales, GDI will misrender the MingLiU font, so we force use of + // DirectWrite to work around the issue. + if (Q_UNLIKELY(familyName.startsWith(QLatin1String("MingLiU")))) + return true; + return hintingPreference == QFont::PreferNoHinting || hintingPreference == QFont::PreferVerticalHinting || (QHighDpiScaling::isActive() && hintingPreference == QFont::PreferDefaultHinting); @@ -1875,7 +1883,7 @@ QFontEngine *QWindowsFontDatabase::createEngine(const QFontDef &request, #endif const QFont::HintingPreference hintingPreference = static_cast<QFont::HintingPreference>(request.hintingPreference); - const bool useDw = useDirectWrite(hintingPreference, isColorFont); + const bool useDw = useDirectWrite(hintingPreference, fam, isColorFont); qCDebug(lcQpaFonts) << __FUNCTION__ << request.family << request.pointSize << "pt" << "hintingPreference=" << hintingPreference << "color=" << isColorFont << dpi << "dpi" << "useDirectWrite=" << useDw; diff --git a/src/plugins/platforms/windows/qwindowsfontenginedirectwrite.cpp b/src/plugins/platforms/windows/qwindowsfontenginedirectwrite.cpp index 66cc08f9fa..334e9cb8b9 100644 --- a/src/plugins/platforms/windows/qwindowsfontenginedirectwrite.cpp +++ b/src/plugins/platforms/windows/qwindowsfontenginedirectwrite.cpp @@ -185,6 +185,18 @@ namespace { } +static DWRITE_RENDERING_MODE hintingPreferenceToRenderingMode(QFont::HintingPreference hintingPreference) +{ + switch (hintingPreference) { + case QFont::PreferNoHinting: + return DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC; + case QFont::PreferVerticalHinting: + return DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL; + default: + return DWRITE_RENDERING_MODE_CLEARTYPE_GDI_CLASSIC; + } +} + /*! \class QWindowsFontEngineDirectWrite \brief Windows font engine using Direct Write. @@ -661,9 +673,7 @@ QImage QWindowsFontEngineDirectWrite::imageForGlyph(glyph_t t, transform.m22 = xform.m22(); DWRITE_RENDERING_MODE renderMode = - fontDef.hintingPreference == QFont::PreferNoHinting - ? DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC - : DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL; + hintingPreferenceToRenderingMode(QFont::HintingPreference(fontDef.hintingPreference)); IDWriteGlyphRunAnalysis *glyphAnalysis = NULL; HRESULT hr = m_fontEngineData->directWriteFactory->CreateGlyphRunAnalysis( @@ -950,9 +960,7 @@ glyph_metrics_t QWindowsFontEngineDirectWrite::alphaMapBoundingBox(glyph_t glyph transform.m22 = matrix.m22(); DWRITE_RENDERING_MODE renderMode = - fontDef.hintingPreference == QFont::PreferNoHinting - ? DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC - : DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL; + hintingPreferenceToRenderingMode(QFont::HintingPreference(fontDef.hintingPreference)); IDWriteGlyphRunAnalysis *glyphAnalysis = NULL; HRESULT hr = m_fontEngineData->directWriteFactory->CreateGlyphRunAnalysis( |