diff options
| -rw-r--r-- | src/plugins/platforms/xcb/nativepainting/qbackingstore_x11.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/plugins/platforms/xcb/nativepainting/qbackingstore_x11.cpp b/src/plugins/platforms/xcb/nativepainting/qbackingstore_x11.cpp index 8851ea59e5..ed482e5dae 100644 --- a/src/plugins/platforms/xcb/nativepainting/qbackingstore_x11.cpp +++ b/src/plugins/platforms/xcb/nativepainting/qbackingstore_x11.cpp @@ -62,8 +62,10 @@ QXcbNativeBackingStore::QXcbNativeBackingStore(QWindow *window) : QPlatformBackingStore(window) , m_translucentBackground(false) { - if (QXcbWindow *w = static_cast<QXcbWindow *>(window->handle())) - m_translucentBackground = w->connection()->hasXRender() && QImage::toPixelFormat(w->imageFormat()).alphaSize() > 0; + if (QXcbWindow *w = static_cast<QXcbWindow *>(window->handle())) { + m_translucentBackground = w->connection()->hasXRender() && + QImage::toPixelFormat(w->imageFormat()).alphaUsage() == QPixelFormat::UsesAlpha; + } } QXcbNativeBackingStore::~QXcbNativeBackingStore() |