present/scmd: Check that the flip and screen pixmap pitches match
If they don't, flipping will result in corrupted display. Test case: * Run Xorg at 1920x1080 with no window manager * glxgears -geometry 2048x1080
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@ -78,7 +78,7 @@ present_check_flip(RRCrtcPtr crtc,
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PresentFlipReason *reason)
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{
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ScreenPtr screen = window->drawable.pScreen;
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PixmapPtr window_pixmap;
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PixmapPtr screen_pixmap, window_pixmap;
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WindowPtr root = screen->root;
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present_screen_priv_ptr screen_priv = present_screen_priv(screen);
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@ -99,8 +99,9 @@ present_check_flip(RRCrtcPtr crtc,
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return FALSE;
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/* Make sure the window hasn't been redirected with Composite */
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screen_pixmap = screen->GetScreenPixmap(screen);
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window_pixmap = screen->GetWindowPixmap(window);
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if (window_pixmap != screen->GetScreenPixmap(screen) &&
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if (window_pixmap != screen_pixmap &&
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window_pixmap != screen_priv->flip_pixmap &&
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window_pixmap != present_flip_pending_pixmap(screen))
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return FALSE;
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@ -126,7 +127,8 @@ present_check_flip(RRCrtcPtr crtc,
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window->drawable.x != pixmap->screen_x || window->drawable.y != pixmap->screen_y ||
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#endif
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window->drawable.width != pixmap->drawable.width ||
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window->drawable.height != pixmap->drawable.height) {
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window->drawable.height != pixmap->drawable.height ||
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pixmap->devKind != screen_pixmap->devKind) {
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return FALSE;
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}
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