diff options
| -rw-r--r-- | src/gui/painting/qpaintengine_raster.cpp | 3 | ||||
| -rw-r--r-- | tests/auto/qpainter/tst_qpainter.cpp | 33 |
2 files changed, 36 insertions, 0 deletions
diff --git a/src/gui/painting/qpaintengine_raster.cpp b/src/gui/painting/qpaintengine_raster.cpp index 8f9d8ba..3717ed9 100644 --- a/src/gui/painting/qpaintengine_raster.cpp +++ b/src/gui/painting/qpaintengine_raster.cpp @@ -40,6 +40,7 @@ ****************************************************************************/ #include <QtCore/qglobal.h> +#include <QtCore/qmutex.h> #define QT_FT_BEGIN_HEADER #define QT_FT_END_HEADER @@ -4946,6 +4947,7 @@ public: for (int i = 0; i < stops.size() && i <= 2; i++) hash_val += stops[i].second.rgba(); + QMutexLocker lock(&mutex); QGradientColorTableHash::const_iterator it = cache.constFind(hash_val); if (it == cache.constEnd()) @@ -4979,6 +4981,7 @@ protected: } QGradientColorTableHash cache; + QMutex mutex; }; void QGradientCache::generateGradientColorTable(const QGradient& gradient, uint *colorTable, int size, int opacity) const diff --git a/tests/auto/qpainter/tst_qpainter.cpp b/tests/auto/qpainter/tst_qpainter.cpp index 45f5c3e..ff9bf1c 100644 --- a/tests/auto/qpainter/tst_qpainter.cpp +++ b/tests/auto/qpainter/tst_qpainter.cpp @@ -49,6 +49,7 @@ #include <qfontmetrics.h> #include <qbitmap.h> #include <qimage.h> +#include <qthread.h> #include <limits.h> #if !defined(Q_OS_WINCE) && !defined(Q_OS_SYMBIAN) #include <qprinter.h> @@ -254,6 +255,8 @@ private slots: void drawPointScaled(); + void QTBUG14614_gradientCacheRaceCondition(); + private: void fillData(); void setPenColor(QPainter& p); @@ -4543,6 +4546,36 @@ void tst_QPainter::drawPointScaled() QCOMPARE(image.pixel(16, 16), 0xffff0000); } +class GradientProducer : public QThread +{ +protected: + void run(); +}; + +void GradientProducer::run() +{ + QImage image(1, 1, QImage::Format_RGB32); + QPainter p(&image); + + for (int i = 0; i < 1000; ++i) { + QLinearGradient g; + g.setColorAt(0, QColor(i % 256, 0, 0)); + g.setColorAt(1, Qt::white); + + p.fillRect(image.rect(), g); + } +} + +void tst_QPainter::QTBUG14614_gradientCacheRaceCondition() +{ + const int threadCount = 16; + GradientProducer producers[threadCount]; + for (int i = 0; i < threadCount; ++i) + producers[i].start(); + for (int i = 0; i < threadCount; ++i) + producers[i].wait(); +} + QTEST_MAIN(tst_QPainter) #include "tst_qpainter.moc" |