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| author | Samuel Rødal <sroedal@trolltech.com> | 2009-10-16 07:55:28 (GMT) |
|---|---|---|
| committer | Samuel Rødal <sroedal@trolltech.com> | 2009-10-22 16:44:05 (GMT) |
| commit | 5de213210ef4f14e698c3fd970cf7e6c5b27c72d (patch) | |
| tree | da5d692ff2dec2ed835cc698ee7770d93351830d /src/gui/effects/qgraphicseffect.cpp | |
| parent | a392366b164081fe3b75c806dbf2030e64754eaf (diff) | |
| download | Qt-5de213210ef4f14e698c3fd970cf7e6c5b27c72d.zip Qt-5de213210ef4f14e698c3fd970cf7e6c5b27c72d.tar.gz Qt-5de213210ef4f14e698c3fd970cf7e6c5b27c72d.tar.bz2 | |
Added caching of graphics effect source pixmaps to speed up effects.
If an effect is applied repeatedly on the same source, just with
varying parameters, we can save a lot by caching the source pixmaps.
Reviewed-by: Bjørn Erik Nilsen
Diffstat (limited to 'src/gui/effects/qgraphicseffect.cpp')
| -rw-r--r-- | src/gui/effects/qgraphicseffect.cpp | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/gui/effects/qgraphicseffect.cpp b/src/gui/effects/qgraphicseffect.cpp index 91641b0..96d35b0 100644 --- a/src/gui/effects/qgraphicseffect.cpp +++ b/src/gui/effects/qgraphicseffect.cpp @@ -253,7 +253,24 @@ bool QGraphicsEffectSource::isPixmap() const */ QPixmap QGraphicsEffectSource::pixmap(Qt::CoordinateSystem system, QPoint *offset) const { - return d_func()->pixmap(system, offset); + Q_D(const QGraphicsEffectSource); + + QPixmap pm; + if (d->m_cachedSystem == system) + QPixmapCache::find(d->m_cacheKey, &pm); + + if (pm.isNull()) { + pm = d->pixmap(system, &d->m_cachedOffset); + d->m_cachedSystem = system; + + d->invalidateCache(); + d->m_cacheKey = QPixmapCache::insert(pm); + } + + if (offset) + *offset = d->m_cachedOffset; + + return pm; } /*! |