diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/opengl/qgl.cpp | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp index 3cfdcc549c..d73109dfd9 100644 --- a/src/opengl/qgl.cpp +++ b/src/opengl/qgl.cpp @@ -2497,7 +2497,19 @@ QGLTexture *QGLContextPrivate::bindTexture(const QPixmap &pixmap, GLenum target, } if (!texture) { - QImage image = pixmap.toImage(); + QImage image; + QPaintEngine* paintEngine = pixmap.paintEngine(); + if (!paintEngine || paintEngine->type() != QPaintEngine::Raster) + image = pixmap.toImage(); + else { + // QRasterPixmapData::toImage() will deep-copy the backing QImage if there's an active QPainter on it. + // For performance reasons, we don't want that here, so we temporarily redirect the paint engine. + QPaintDevice* currentPaintDevice = paintEngine->paintDevice(); + paintEngine->setPaintDevice(0); + image = pixmap.toImage(); + paintEngine->setPaintDevice(currentPaintDevice); + } + // If the system depth is 16 and the pixmap doesn't have an alpha channel // then we convert it to RGB16 in the hope that it gets uploaded as a 16 // bit texture which is much faster to access than a 32-bit one. |