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Windows: Add fallback for UpdateLayeredWindowIndirect 

The UpdateLayeredWindowIndirect function is only available on Windows
Vista and later. If UpdateLayeredWindowIndirect is not available
(e.g. on Windows XP), use UpdateLayeredWindow instead.

Change-Id: I8af23c051560f7e54eda390dae7553543c00a94b
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
bb10
Jonathan Liu 2012-12-31 18:31:19 +11:00 committed by The Qt Project
parent 4250fa2cf6
commit d75b217901
1 changed files with 9 additions and 4 deletions
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13
src/plugins/platforms/windows/qwindowsbackingstore.cpp
View File

@ -100,10 +100,15 @@ void QWindowsBackingStore::flush(QWindow *window, const QRegion &region,
POINT ptDst = {r.x(), r.y()};
POINT ptSrc = {0, 0};
BLENDFUNCTION blend = {AC_SRC_OVER, 0, (BYTE)(255.0 * rw->opacity()), AC_SRC_ALPHA};
RECT dirty = {dirtyRect.x(), dirtyRect.y(),
dirtyRect.x() + dirtyRect.width(), dirtyRect.y() + dirtyRect.height()};
UPDATELAYEREDWINDOWINFO info = {sizeof(info), NULL, &ptDst, &size, m_image->hdc(), &ptSrc, 0, &blend, ULW_ALPHA, &dirty};
QWindowsContext::user32dll.updateLayeredWindowIndirect(rw->handle(), &info);
if (QWindowsContext::user32dll.updateLayeredWindowIndirect) {
RECT dirty = {dirtyRect.x(), dirtyRect.y(),
dirtyRect.x() + dirtyRect.width(), dirtyRect.y() + dirtyRect.height()};
UPDATELAYEREDWINDOWINFO info = {sizeof(info), NULL, &ptDst, &size, m_image->hdc(), &ptSrc, 0, &blend, ULW_ALPHA, &dirty};
QWindowsContext::user32dll.updateLayeredWindowIndirect(rw->handle(), &info);
} else {
QWindowsContext::user32dll.updateLayeredWindow(rw->handle(), NULL, &ptDst, &size, m_image->hdc(), &ptSrc, 0, &blend, ULW_ALPHA);
}
} else {
#endif
const HDC dc = rw->getDC();