Fix QImage::setPixelColor on RGBA64_Premultiplied

QColors were not premultiplied before being set.

Pick-to: 6.0 5.15 5.12
Change-Id: Id3765b6932a72374ddfd788fae4bb628a4edf0b7
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 1 insertions, 4 deletions

diff --git a/src/gui/image/qimage.cpp b/src/gui/image/qimage.cpp
index d05a72acc6..70b958c177 100644
--- a/src/gui/image/qimage.cpp
+++ b/src/gui/image/qimage.cpp
@@ -2620,12 +2620,9 @@ void QImage::setPixelColor(int x, int y, const QColor &color)
         ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderRGB>(c);
         return;
     case Format_RGBX64:
-        ((QRgba64 *)s)[x] = color.rgba64();
-        ((QRgba64 *)s)[x].setAlpha(65535);
-        return;
     case Format_RGBA64:
     case Format_RGBA64_Premultiplied:
-        ((QRgba64 *)s)[x] = color.rgba64();
+        ((QRgba64 *)s)[x] = c;
         return;
     default:
         setPixel(x, y, c.toArgb32());