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| author | Sami Kyöstilä <sami.kyostila@nokia.com> | 2011-03-31 12:04:47 (GMT) |
|---|---|---|
| committer | Samuel Rødal <samuel.rodal@nokia.com> | 2011-03-31 12:04:47 (GMT) |
| commit | a538389b52630ec53734695b8d422c5ec124b0bc (patch) | |
| tree | 9bf6dd4a3986faca5c559b7edd59fb886c30999b /src/opengl/gl2paintengineex | |
| parent | 8abc3cd80fd55c588faffb067ab51feb4b9b6fc5 (diff) | |
| download | Qt-a538389b52630ec53734695b8d422c5ec124b0bc.zip Qt-a538389b52630ec53734695b8d422c5ec124b0bc.tar.gz Qt-a538389b52630ec53734695b8d422c5ec124b0bc.tar.bz2 | |
opengl2: Make maximum cached glyph size configurable
As the DPI of displays continues to rise, especially on mobile devices,
the maximum glyph size of 64 pixels for the glyph cache has become a
limitation. This problem is made worse by the fact that when the maximum
glyph size is exceeded, the OpenGL paint engine falls back to using
rasterized geometry for glyph rendering. This does not produce
acceptable quality if the OpenGL rendering surface lacks support for
multisampling.
This patch offers a solution to the problem by making the
cached glyph size configurable at build time. This way the limit can be
set according to the capabilities of the target hardware.
Signed-off-by: Sami Kyöstilä <sami.kyostila@nokia.com>
Merge-request: 1131
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
Diffstat (limited to 'src/opengl/gl2paintengineex')
| -rw-r--r-- | src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp index 6678522..4d1d5dc 100644 --- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp +++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp @@ -98,6 +98,10 @@ extern Q_GUI_EXPORT bool qt_cleartype_enabled; extern bool qt_applefontsmoothing_enabled; #endif +#if !defined(QT_MAX_CACHED_GLYPH_SIZE) +# define QT_MAX_CACHED_GLYPH_SIZE 64 +#endif + Q_GUI_EXPORT QImage qt_imageForBrush(int brushStyle, bool invert); ////////////////////////////////// Private Methods ////////////////////////////////////////// @@ -1473,7 +1477,8 @@ void QGL2PaintEngineEx::drawTextItem(const QPointF &p, const QTextItem &textItem // don't try to cache huge fonts or vastly transformed fonts const qreal pixelSize = ti.fontEngine->fontDef.pixelSize; - if (pixelSize * pixelSize * qAbs(det) >= 64 * 64 || det < 0.25f || det > 4.f) + if (pixelSize * pixelSize * qAbs(det) >= QT_MAX_CACHED_GLYPH_SIZE * QT_MAX_CACHED_GLYPH_SIZE || + det < 0.25f || det > 4.f) drawCached = false; QFontEngineGlyphCache::Type glyphType = ti.fontEngine->glyphFormat >= 0 |