Fix crash in OpenGL paint engine with hq antialiasing and TxProject

Use painter paths instead of rectangles for perspective transformed
rects, as the rectangles might have been clipped.

Task-number: 251485
Reviewed-by: Trond

1 files changed, 8 insertions, 2 deletions

diff --git a/src/opengl/qpaintengine_opengl.cpp b/src/opengl/qpaintengine_opengl.cpp
index 88fd3794a4..ec6e33b1e9 100644
--- a/src/opengl/qpaintengine_opengl.cpp
+++ b/src/opengl/qpaintengine_opengl.cpp
@@ -3716,8 +3716,14 @@ void QOpenGLPaintEngine::drawRects(const QRectF *rects, int rectCount)
                 d->disableClipping();
                 GLuint program = qt_gl_program_cache()->getProgram(d->drawable.context(),
                                                                    FRAGMENT_PROGRAM_MASK_TRAPEZOID_AA, 0, true);
-                QGLRectMaskGenerator maskGenerator(path, d->matrix, d->offscreen, program);
-                d->addItem(qt_mask_texture_cache()->getMask(maskGenerator, d));
+
+                if (d->matrix.type() >= QTransform::TxProject) {
+                    QGLPathMaskGenerator maskGenerator(path, d->matrix, d->offscreen, program);
+                    d->addItem(qt_mask_texture_cache()->getMask(maskGenerator, d));
+                } else {
+                    QGLRectMaskGenerator maskGenerator(path, d->matrix, d->offscreen, program);
+                    d->addItem(qt_mask_texture_cache()->getMask(maskGenerator, d));
+                }
 
                 d->enableClipping();
             }