File commit-5c6a2f9.diff of Package xorg-x11-server.import4447

commit 5c6a2f93ebc16a78093782b442306de23ae94e78
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Mon Sep 27 19:39:23 2010 +0100

    xfree86: Kill pixmapPrivate with a vengeance (v2)
    
    ScrnInfo->pixmapPrivate only existed in order to catch invalid access to
    the framebuffer by making the backing data NULL across the VT switch.
    This was causing more confusion in the higher layers during mode setting
    without any real benefit, so remove it.
    
    v2: Kill ShadowModifyPixmapHeader() as well.
    
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
    Cc: Julien Cristau <jcristau@debian.org>
    Cc: Andrew Guertin <lists@dolphinling.net>
    Reviewed-by: Keith Packard <keithp@keithp.com>
    Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/hw/xfree86/common/xf86Helper.c b/hw/xfree86/common/xf86Helper.c
index 90e0c67..97e5aec 100644
--- a/hw/xfree86/common/xf86Helper.c
+++ b/hw/xfree86/common/xf86Helper.c
@@ -1180,10 +1180,6 @@ xf86EnableDisableFBAccess(int scrnIndex, Bool enable)
     if (enable)
     {
 	/*
-	 * Restore the screen pixmap devPrivate field
-	 */
-	pspix->devPrivate = pScrnInfo->pixmapPrivate;
-	/*
 	 * Restore all of the clip lists on the screen
 	 */
 	if (!xf86Resetting)
@@ -1196,13 +1192,6 @@ xf86EnableDisableFBAccess(int scrnIndex, Bool enable)
 	 * Empty all of the clip lists on the screen
 	 */
 	xf86SetRootClip (pScreen, FALSE);
-	/*
-	 * save the screen pixmap devPrivate field and
-	 * replace it with NULL so accidental references
-	 * to the frame buffer are caught
-	 */
-	pScrnInfo->pixmapPrivate = pspix->devPrivate;
-	pspix->devPrivate.ptr = NULL;
     }
 }
 
diff --git a/hw/xfree86/common/xf86str.h b/hw/xfree86/common/xf86str.h
index c9b261d..b979884 100644
--- a/hw/xfree86/common/xf86str.h
+++ b/hw/xfree86/common/xf86str.h
@@ -765,7 +765,7 @@ typedef struct _ScrnInfoRec {
 
     /* Allow screens to be enabled/disabled individually */
     Bool		vtSema;
-    DevUnion		pixmapPrivate;		/* saved devPrivate from pixmap */
+    DevUnion		pixmapPrivate;          /* XXX obsoleted; just for ABI compatibility */
 
     /* hw cursor moves at SIGIO time */
     Bool		silkenMouse;
diff --git a/hw/xfree86/modes/xf86RandR12.c b/hw/xfree86/modes/xf86RandR12.c
index 8a593a7..ba0862a 100644
--- a/hw/xfree86/modes/xf86RandR12.c
+++ b/hw/xfree86/modes/xf86RandR12.c
@@ -511,7 +511,6 @@ xf86RandR12SetMode (ScreenPtr	    pScreen,
     WindowPtr		pRoot = pScreen->root;
     DisplayModePtr      currentMode = NULL;
     Bool 		ret = TRUE;
-    PixmapPtr 		pspix = NULL;
 
     if (pRoot)
 	(*scrp->EnableDisableFBAccess) (pScreen->myNum, FALSE);
@@ -560,14 +559,6 @@ xf86RandR12SetMode (ScreenPtr	    pScreen,
 	pScreen->mmHeight = oldmmHeight;
         scrp->currentMode = currentMode;
     }
-    /*
-     * Get the new Screen pixmap ptr as SwitchMode might have called
-     * ModifyPixmapHeader and xf86EnableDisableFBAccess will put it back...
-     * Unfortunately.
-     */
-    pspix = (*pScreen->GetScreenPixmap) (pScreen);
-    if (pspix->devPrivate.ptr)
-       scrp->pixmapPrivate = pspix->devPrivate;
 
     /*
      * Make sure the layout is correct
diff --git a/hw/xfree86/shadowfb/shadow.c b/hw/xfree86/shadowfb/shadow.c
index 0af53d1..5cc476a 100644
--- a/hw/xfree86/shadowfb/shadow.c
+++ b/hw/xfree86/shadowfb/shadow.c
@@ -36,15 +36,6 @@ static void ShadowCopyWindow(
     RegionPtr prgn 
 );
 static Bool ShadowCreateGC(GCPtr pGC);
-static Bool ShadowModifyPixmapHeader(
-    PixmapPtr pPixmap,
-    int width,
-    int height,
-    int depth,
-    int bitsPerPixel,
-    int devKind,
-    pointer pPixData
-);
 
 static Bool ShadowEnterVT(int index, int flags);
 static void ShadowLeaveVT(int index, int flags);
@@ -189,7 +180,6 @@ ShadowFBInit2 (
     pScreen->CloseScreen = ShadowCloseScreen;
     pScreen->CopyWindow = ShadowCopyWindow;
     pScreen->CreateGC = ShadowCreateGC;
-    pScreen->ModifyPixmapHeader = ShadowModifyPixmapHeader;
 
     pScrn->EnterVT = ShadowEnterVT;
     pScrn->LeaveVT = ShadowLeaveVT;
@@ -310,49 +300,6 @@ ShadowCopyWindow(
     }
 }
 
-static Bool
-ShadowModifyPixmapHeader(
-    PixmapPtr pPixmap,
-    int width,
-    int height,
-    int depth,
-    int bitsPerPixel,
-    int devKind,
-    pointer pPixData
-)
-{
-    ScreenPtr pScreen;
-    ScrnInfoPtr pScrn;
-    ShadowScreenPtr pPriv;
-    Bool retval;
-    PixmapPtr pScreenPix;
-
-    if (!pPixmap)
-	return FALSE;
-
-    pScreen = pPixmap->drawable.pScreen;
-    pScrn = xf86Screens[pScreen->myNum];
-
-    pScreenPix = (*pScreen->GetScreenPixmap)(pScreen);
-    
-    if (pPixmap == pScreenPix && !pScrn->vtSema)
-	pScreenPix->devPrivate = pScrn->pixmapPrivate;
-    
-    pPriv = GET_SCREEN_PRIVATE(pScreen);
-
-    pScreen->ModifyPixmapHeader = pPriv->ModifyPixmapHeader;
-    retval = (*pScreen->ModifyPixmapHeader)(pPixmap,
-	width, height, depth, bitsPerPixel, devKind, pPixData);
-    pScreen->ModifyPixmapHeader = ShadowModifyPixmapHeader;
-
-    if (pPixmap == pScreenPix && !pScrn->vtSema)
-    {
-	pScrn->pixmapPrivate = pScreenPix->devPrivate;
-	pScreenPix->devPrivate.ptr = 0;
-    }
-    return retval;
-}
-
 static void
 ShadowComposite(
     CARD8 op,