Revert "present/scmd: Check that the flip and screen pixmap pitches match"

This reverts commit ef91da2757050652c724f6e674e8b1acf5d0cb31.

I thought this couldn't work under any circumstances, but I was wrong,
and drivers are already checking for cases that really cannot work.

Fixes issue #839.

(cherry picked from commit 2f0dd1816d556eef8c4b691330d39f13e1ed93f0)

1 files changed, 3 insertions, 5 deletions

diff --git a/present/present_scmd.c b/present/present_scmd.c
index 3b7fbd832..6a580cb7a 100644
--- a/present/present_scmd.c
+++ b/present/present_scmd.c
@@ -78,7 +78,7 @@ present_check_flip(RRCrtcPtr            crtc,
                    PresentFlipReason   *reason)
 {
     ScreenPtr                   screen = window->drawable.pScreen;
-    PixmapPtr                   screen_pixmap, window_pixmap;
+    PixmapPtr                   window_pixmap;
     WindowPtr                   root = screen->root;
     present_screen_priv_ptr     screen_priv = present_screen_priv(screen);
 
@@ -99,9 +99,8 @@ present_check_flip(RRCrtcPtr            crtc,
         return FALSE;
 
     /* Make sure the window hasn't been redirected with Composite */
-    screen_pixmap = screen->GetScreenPixmap(screen);
     window_pixmap = screen->GetWindowPixmap(window);
-    if (window_pixmap != screen_pixmap &&
+    if (window_pixmap != screen->GetScreenPixmap(screen) &&
         window_pixmap != screen_priv->flip_pixmap &&
         window_pixmap != present_flip_pending_pixmap(screen))
         return FALSE;
@@ -127,8 +126,7 @@ present_check_flip(RRCrtcPtr            crtc,
         window->drawable.x != pixmap->screen_x || window->drawable.y != pixmap->screen_y ||
 #endif
         window->drawable.width != pixmap->drawable.width ||
-        window->drawable.height != pixmap->drawable.height ||
-        pixmap->devKind != screen_pixmap->devKind) {
+        window->drawable.height != pixmap->drawable.height) {
         return FALSE;
     }