Fix drawhelper pixel-writeback when dest has alpha.

The blending always happens in 32-bit premultiplied so the conversion
back to dest-format needs to base itself on premlutiplied too.

Task-number: 182246
Reviewed-by: Samuel

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp
index efdc7785e2..e7bb1e1bd4 100644
--- a/src/gui/painting/qdrawhelper.cpp
+++ b/src/gui/painting/qdrawhelper.cpp
@@ -370,7 +370,7 @@ Q_STATIC_TEMPLATE_FUNCTION void QT_FASTCALL destStore(QRasterBuffer *rasterBuffe
                                   Q_TEMPLATE_FIX(DST))
 {
     DST *dest = reinterpret_cast<DST*>(rasterBuffer->scanLine(y)) + x;
-    const quint32 *src = reinterpret_cast<const quint32*>(buffer);
+    const quint32p *src = reinterpret_cast<const quint32p*>(buffer);
     while (length--)
         *dest++ = DST(*src++);
 }