diff options
| author | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2016-11-21 13:33:55 +0100 |
|---|---|---|
| committer | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2017-01-24 20:42:32 +0000 |
| commit | 21f27c9a4d0f2ab0976c144f631c9171c899014b (patch) | |
| tree | 01270b13f790565a30ba1a6931e3b786901d9f42 /src/platformsupport/fontdatabases | |
| parent | d2758b2f1dd88d273ff70864a0dd03a7c4e9dc78 (diff) | |
Enable gamma-correction on a face-by-face basis
Changes how we control if gamma-correction is done, and enables it for
the freetype CFF engine when stem-darkening is available.
The new code replaces existing hacks to force gamma-correction off
when using Freetype on X11 and Windows.
Change-Id: Ic703ca6965a3d81b204349e10f406c991b292edd
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
Diffstat (limited to 'src/platformsupport/fontdatabases')
3 files changed, 6 insertions, 3 deletions
diff --git a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm index 1f152a3d32..c8ae342f16 100644 --- a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm +++ b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm @@ -602,6 +602,11 @@ glyph_metrics_t QCoreTextFontEngine::alphaMapBoundingBox(glyph_t glyph, QFixed s return br; } +bool QCoreTextFontEngine::expectsGammaCorrectedBlending() const +{ + // Only works well when font-smoothing is enabled + return (glyphFormat == Format_A32) && !(fontDef.styleStrategy & (QFont::NoAntialias | QFont::NoSubpixelAntialias)); +} QImage QCoreTextFontEngine::imageForGlyph(glyph_t glyph, QFixed subPixelPosition, bool aa, const QTransform &matrix) { diff --git a/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h b/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h index d9ffbb5697..0074790e43 100644 --- a/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h +++ b/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h @@ -110,6 +110,7 @@ public: void doKerning(QGlyphLayout *g, ShaperFlags flags) const Q_DECL_OVERRIDE; bool supportsTransformation(const QTransform &transform) const Q_DECL_OVERRIDE; + bool expectsGammaCorrectedBlending() const Q_DECL_OVERRIDE; QFontEngine *cloneWithSize(qreal pixelSize) const Q_DECL_OVERRIDE; Qt::HANDLE handle() const Q_DECL_OVERRIDE; diff --git a/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp b/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp index a5779fc291..2a5e7006e6 100644 --- a/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp +++ b/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp @@ -1207,8 +1207,6 @@ QWindowsFontEngineDataPtr sharedFontData() } #endif // QT_NO_THREAD -extern Q_GUI_EXPORT bool qt_needs_a8_gamma_correction; - QWindowsFontDatabase::QWindowsFontDatabase() { // Properties accessed by QWin32PrintEngine (Qt Print Support) @@ -1222,7 +1220,6 @@ QWindowsFontDatabase::QWindowsFontDatabase() qCDebug(lcQpaFonts) << __FUNCTION__ << "Clear type: " << data->clearTypeEnabled << "gamma: " << data->fontSmoothingGamma; } - qt_needs_a8_gamma_correction = true; } QWindowsFontDatabase::~QWindowsFontDatabase() |