Compose renderToTexture widgets with sRGB when needed

Just requesting an sRGB texture for a QOpenGLWidget does not lead to
anything useful when it comes to the end result, the content will just get
darkened. For proper operation the target window's default framebuffer
must be sRGB capable and linearization during blending must be enabled.

Task-number: QTBUG-50987
Change-Id: Ibad0657c29a720590fa22c84c4bc303302de6dc0
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

1 files changed, 1 insertions, 3 deletions

diff --git a/src/widgets/kernel/qwidgetbackingstore.cpp b/src/widgets/kernel/qwidgetbackingstore.cpp
index 781ad9600d..4421218d1d 100644
--- a/src/widgets/kernel/qwidgetbackingstore.cpp
+++ b/src/widgets/kernel/qwidgetbackingstore.cpp
@@ -945,9 +945,7 @@ static void findTextureWidgetsRecursively(QWidget *tlw, QWidget *widget, QPlatfo
 {
     QWidgetPrivate *wd = QWidgetPrivate::get(widget);
     if (wd->renderToTexture) {
-        QPlatformTextureList::Flags flags = 0;
-        if (widget->testAttribute(Qt::WA_AlwaysStackOnTop))
-            flags |= QPlatformTextureList::StacksOnTop;
+        QPlatformTextureList::Flags flags = wd->textureListFlags();
         const QRect rect(widget->mapTo(tlw, QPoint()), widget->size());
         widgetTextures->appendTexture(widget, wd->textureId(), rect, wd->clipRect(), flags);
     }