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-rw-r--r--src/gui/image/qpixmapfilter.cpp5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/gui/image/qpixmapfilter.cpp b/src/gui/image/qpixmapfilter.cpp
index 2792e45..c605880 100644
--- a/src/gui/image/qpixmapfilter.cpp
+++ b/src/gui/image/qpixmapfilter.cpp
@@ -777,6 +777,9 @@ void expblur(QImage &img, qreal radius, bool improvedQuality = false, int transp
Q_GUI_EXPORT QImage qt_halfScaled(const QImage &source)
{
+ if (source.width() < 2 || source.height() < 2)
+ return QImage();
+
QImage srcImage = source;
if (source.format() == QImage::Format_Indexed8) {
@@ -869,7 +872,7 @@ Q_GUI_EXPORT void qt_blurImage(QPainter *p, QImage &blurImage, qreal radius, boo
}
qreal scale = 1;
- if (radius >= 4) {
+ if (radius >= 4 && blurImage.width() >= 2 && blurImage.height() >= 2) {
blurImage = qt_halfScaled(blurImage);
scale = 2;
radius *= qreal(0.5);