[Xquartz-changes] xserver: Branch 'server-1.10-apple' - 6 commits

Jeremy Huddleston jeremyhu at freedesktop.org
Wed Jun 29 21:46:10 PDT 2011


Rebased ref, commits from common ancestor:
commit c1210250bcee7d6c2bc9ce587bd8cbfe4e6161dd
Author: Jeremy Huddleston <jeremyhu at apple.com>
Date:   Fri Feb 12 19:48:52 2010 -0800

    fb: Revert fb changes that broke XQuartz
    
    http://bugs.freedesktop.org/show_bug.cgi?id=26124
    
    Revert "Fix source pictures getting random transforms after 2d6a8f668342a5190cdf43b5."
    Revert "fb: Adjust transform or composite coordinates for pixman operations"
    
    http://bugs.freedesktop.org/26124
    
    This reverts commit a72c65e9176c51de95db2fdbf4c5d946a4911695.
    This reverts commit a6bd5d2e482a5aa84acb3d4932e2a166d8670ef1.
    
    Signed-off-by: Jeremy Huddleston <jeremyhu at apple.com>

diff --git a/fb/fb.h b/fb/fb.h
index 021a940..0b248e1 100644
--- a/fb/fb.h
+++ b/fb/fb.h
@@ -2079,11 +2079,8 @@ fbFillRegionSolid (DrawablePtr	pDrawable,
 		   FbBits	xor);
 
 extern _X_EXPORT pixman_image_t *
-image_from_pict (PicturePtr	pict,
-		 Bool		has_clip,
-		 int		*xoff,
-		 int		*yoff);
-
+image_from_pict (PicturePtr pict,
+		 Bool       has_clip);
 extern _X_EXPORT void free_pixman_pict (PicturePtr, pixman_image_t *);
 
 #endif /* _FB_H_ */
diff --git a/fb/fbpict.c b/fb/fbpict.c
index 7636040..af1920b 100644
--- a/fb/fbpict.c
+++ b/fb/fbpict.c
@@ -50,24 +50,19 @@ fbComposite (CARD8      op,
 	     CARD16     height)
 {
     pixman_image_t *src, *mask, *dest;
-    int src_xoff, src_yoff;
-    int msk_xoff, msk_yoff;
-    int dst_xoff, dst_yoff;
     
     miCompositeSourceValidate (pSrc, xSrc - xDst, ySrc - yDst, width, height);
     if (pMask)
 	miCompositeSourceValidate (pMask, xMask - xDst, yMask - yDst, width, height);
     
-    src = image_from_pict (pSrc, FALSE, &src_xoff, &src_yoff);
-    mask = image_from_pict (pMask, FALSE, &msk_xoff, &msk_yoff);
-    dest = image_from_pict (pDst, TRUE, &dst_xoff, &dst_yoff);
+    src = image_from_pict (pSrc, TRUE);
+    mask = image_from_pict (pMask, TRUE);
+    dest = image_from_pict (pDst, TRUE);
 
     if (src && dest && !(pMask && !mask))
     {
 	pixman_image_composite (op, src, mask, dest,
-				xSrc + src_xoff, ySrc + src_yoff,
-				xMask + msk_xoff, yMask + msk_yoff,
-				xDst + dst_xoff, yDst + dst_yoff,
+				xSrc, ySrc, xMask, yMask, xDst, yDst,
 				width, height);
     }
 
@@ -146,22 +141,22 @@ create_conical_gradient_image (PictGradient *gradient)
 
 static pixman_image_t *
 create_bits_picture (PicturePtr pict,
-		     Bool       has_clip,
-		     int	*xoff,
-		     int	*yoff)
+		     Bool       has_clip)
 {
-    PixmapPtr pixmap;
     FbBits *bits;
     FbStride stride;
-    int bpp;
+    int bpp, xoff, yoff;
     pixman_image_t *image;
     
-    fbGetDrawablePixmap (pict->pDrawable, pixmap, *xoff, *yoff);
-    fbGetPixmapBitsData(pixmap, bits, stride, bpp);
+    fbGetDrawable (pict->pDrawable, bits, stride, bpp, xoff, yoff);
+
+    bits = (FbBits*)((CARD8*)bits +
+		     (pict->pDrawable->y + yoff) * stride * sizeof(FbBits) +
+		     (pict->pDrawable->x + xoff) * (bpp / 8));
 
     image = pixman_image_create_bits (
 	pict->format,
-	pixmap->drawable.width, pixmap->drawable.height,
+	pict->pDrawable->width, pict->pDrawable->height,
 	(uint32_t *)bits, stride * sizeof (FbStride));
     
     
@@ -187,55 +182,33 @@ create_bits_picture (PicturePtr pict,
 	if (pict->clientClipType != CT_NONE)
 	    pixman_image_set_has_client_clip (image, TRUE);
 
-	if (*xoff || *yoff)
-	    pixman_region_translate (pict->pCompositeClip, *xoff, *yoff);
+	pixman_region_translate (pict->pCompositeClip, - pict->pDrawable->x, - pict->pDrawable->y);
 
 	pixman_image_set_clip_region (image, pict->pCompositeClip);
 
-	if (*xoff || *yoff)
-	    pixman_region_translate (pict->pCompositeClip, -*xoff, -*yoff);
+	pixman_region_translate (pict->pCompositeClip, pict->pDrawable->x, pict->pDrawable->y);
     }
     
     /* Indexed table */
     if (pict->pFormat->index.devPrivate)
 	pixman_image_set_indexed (image, pict->pFormat->index.devPrivate);
 
-    /* Add in drawable origin to position within the image */
-    *xoff += pict->pDrawable->x;
-    *yoff += pict->pDrawable->y;
-
     return image;
 }
 
 static pixman_image_t *
-image_from_pict_internal (PicturePtr pict, Bool has_clip, int *xoff, int *yoff, Bool is_alpha_map);
+image_from_pict_internal (PicturePtr pict, Bool has_clip, Bool is_alpha_map);
 
 static void
-set_image_properties (pixman_image_t *image, PicturePtr pict, Bool has_clip, int *xoff, int *yoff, Bool is_alpha_map)
+set_image_properties (pixman_image_t *image, PicturePtr pict, Bool is_alpha_map)
 {
     pixman_repeat_t repeat;
     pixman_filter_t filter;
     
     if (pict->transform)
     {
-	/* For source images, adjust the transform to account
-	 * for the drawable offset within the pixman image,
-	 * then set the offset to 0 as it will be used
-	 * to compute positions within the transformed image.
-	 */
-	if (!has_clip) {
-	    struct pixman_transform	adjusted;
-
-	    adjusted = *pict->transform;
-	    pixman_transform_translate(&adjusted,
-				       NULL,
-				       pixman_int_to_fixed(*xoff),
-				       pixman_int_to_fixed(*yoff));
-	    pixman_image_set_transform (image, &adjusted);
-	    *xoff = 0;
-	    *yoff = 0;
-	} else
-	    pixman_image_set_transform (image, pict->transform);
+	pixman_image_set_transform (
+	    image, (pixman_transform_t *)pict->transform);
     }
     
     switch (pict->repeatType)
@@ -265,8 +238,7 @@ set_image_properties (pixman_image_t *image, PicturePtr pict, Bool has_clip, int
      */
     if (pict->alphaMap && !is_alpha_map)
     {
-	int alpha_xoff, alpha_yoff;
-	pixman_image_t *alpha_map = image_from_pict_internal (pict->alphaMap, FALSE, &alpha_xoff, &alpha_yoff, TRUE);
+	pixman_image_t *alpha_map = image_from_pict_internal (pict->alphaMap, TRUE, TRUE);
 	
 	pixman_image_set_alpha_map (
 	    image, alpha_map, pict->alphaOrigin.x, pict->alphaOrigin.y);
@@ -299,7 +271,8 @@ set_image_properties (pixman_image_t *image, PicturePtr pict, Bool has_clip, int
 }
 
 static pixman_image_t *
-image_from_pict_internal (PicturePtr pict, Bool has_clip, int *xoff, int *yoff, Bool is_alpha_map)
+image_from_pict_internal (PicturePtr pict,
+		 Bool has_clip, Bool is_alpha_map)
 {
     pixman_image_t *image = NULL;
 
@@ -308,7 +281,7 @@ image_from_pict_internal (PicturePtr pict, Bool has_clip, int *xoff, int *yoff,
 
     if (pict->pDrawable)
     {
-	image = create_bits_picture (pict, has_clip, xoff, yoff);
+	image = create_bits_picture (pict, has_clip);
     }
     else if (pict->pSourcePict)
     {
@@ -329,19 +302,18 @@ image_from_pict_internal (PicturePtr pict, Bool has_clip, int *xoff, int *yoff,
 	    else if (sp->type == SourcePictTypeConical)
 		image = create_conical_gradient_image (gradient);
 	}
-	*xoff = *yoff = 0;
     }
     
     if (image)
-	set_image_properties (image, pict, has_clip, xoff, yoff, is_alpha_map);
+	set_image_properties (image, pict, is_alpha_map);
     
     return image;
 }
 
 pixman_image_t *
-image_from_pict (PicturePtr pict, Bool has_clip, int *xoff, int *yoff)
+image_from_pict (PicturePtr pict, Bool has_clip)
 {
-    return image_from_pict_internal (pict, has_clip, xoff, yoff, FALSE);
+    return image_from_pict_internal (pict, has_clip, FALSE);
 }
 
 void
diff --git a/fb/fbtrap.c b/fb/fbtrap.c
index c309ceb..40cffd9 100644
--- a/fb/fbtrap.c
+++ b/fb/fbtrap.c
@@ -37,8 +37,7 @@ fbAddTraps (PicturePtr	pPicture,
 	    int		ntrap,
 	    xTrap	*traps)
 {
-    int image_xoff, image_yoff;
-    pixman_image_t *image = image_from_pict (pPicture, FALSE, &image_xoff, &image_yoff);
+    pixman_image_t *image = image_from_pict (pPicture, FALSE);
 
     if (!image)
 	return;
@@ -54,8 +53,7 @@ fbRasterizeTrapezoid (PicturePtr    pPicture,
 		      int	    x_off,
 		      int	    y_off)
 {
-    int	mask_xoff, mask_yoff;
-    pixman_image_t *image = image_from_pict (pPicture, FALSE, &mask_xoff, &mask_yoff);
+    pixman_image_t *image = image_from_pict (pPicture, FALSE);
 
     if (!image)
 	return;
commit 4c4d2d319e50c3a0ab8ec195a1336e6230fe6d9e
Author: Jeremy Huddleston <jeremyhu at apple.com>
Date:   Fri Apr 30 13:08:25 2010 -0700

    Workaround the GC clipping problem in miPaintWindow and add some debugging output.
    
    Signed-off-by: Jeremy Huddleston <jeremyhu at apple.com>

diff --git a/mi/miexpose.c b/mi/miexpose.c
index 94258b8..4f25c23 100644
--- a/mi/miexpose.c
+++ b/mi/miexpose.c
@@ -521,6 +521,7 @@ void RootlessSetPixmapOfAncestors(WindowPtr pWin);
 void RootlessStartDrawing(WindowPtr pWin);
 void RootlessDamageRegion(WindowPtr pWin, RegionPtr prgn);
 Bool IsFramedWindow(WindowPtr pWin);
+#include "../fb/fb.h"
 #endif 
 
 void
@@ -548,24 +549,37 @@ miPaintWindow(WindowPtr pWin, RegionPtr prgn, int what)
     Bool	solid = TRUE;
     DrawablePtr	drawable = &pWin->drawable;
 
+#ifdef XQUARTZ_CLIP_DEBUG
+    ErrorF("START %d BS %d (pR = %ld)\n", what, pWin->backgroundState, ParentRelative);
+    ErrorF("      Rgn: %d %d %d %d\n", prgn->extents.x1, prgn->extents.y1,
+	                               prgn->extents.x2 - prgn->extents.x1,
+	                               prgn->extents.y2 - prgn->extents.y1);
+    ErrorF("      Win: %d %d (%d %d) %d %d\n", pWin->origin.x, pWin->origin.y,
+	                                       pWin->winSize.extents.x1, pWin->winSize.extents.y1,
+	                                       pWin->winSize.extents.x2 - pWin->winSize.extents.x1,
+					       pWin->winSize.extents.y2 - pWin->winSize.extents.y1);
+    ErrorF("     Draw: %d %d %d %d\n", pWin->drawable.x, pWin->drawable.y,
+				       pWin->drawable.width, pWin->drawable.height);
+#endif
+
 #ifdef ROOTLESS
     if(!drawable || drawable->type == UNDRAWABLE_WINDOW)
 	return;
-
-    if(IsFramedWindow(pWin)) {
-        RootlessStartDrawing(pWin);
-        RootlessDamageRegion(pWin, prgn);
-    
-        if(pWin->backgroundState == ParentRelative) {
-            if((what == PW_BACKGROUND) || 
-               (what == PW_BORDER && !pWin->borderIsPixel))
-                RootlessSetPixmapOfAncestors(pWin);
-        }
-    }
 #endif
     
     if (what == PW_BACKGROUND)
     {
+#ifdef ROOTLESS
+	if(IsFramedWindow(pWin)) {
+	    RootlessStartDrawing(pWin);
+	    RootlessDamageRegion(pWin, prgn);
+
+	    if(pWin->backgroundState == ParentRelative) {
+		RootlessSetPixmapOfAncestors(pWin);
+	    }
+	}
+#endif
+
 	while (pWin->backgroundState == ParentRelative)
 	    pWin = pWin->parent;
 
@@ -587,6 +601,18 @@ miPaintWindow(WindowPtr pWin, RegionPtr prgn, int what)
     {
 	PixmapPtr   pixmap;
 
+#ifdef ROOTLESS
+	if(IsFramedWindow(pWin)) {
+	    RootlessStartDrawing(pWin);
+	    RootlessDamageRegion(pWin, prgn);
+	    
+	    if(!pWin->borderIsPixel &&
+		pWin->backgroundState == ParentRelative) {
+		RootlessSetPixmapOfAncestors(pWin);
+	    }
+	}
+#endif
+
 	tile_x_off = drawable->x;
 	tile_y_off = drawable->y;
 	
@@ -595,6 +621,12 @@ miPaintWindow(WindowPtr pWin, RegionPtr prgn, int what)
 	    return;
 	pixmap = (*pScreen->GetWindowPixmap) ((WindowPtr) drawable);
 	drawable = &pixmap->drawable;
+
+#ifdef XQUARTZ_CLIP_DEBUG
+	ErrorF("     Draw: %d %d %d %d\n",
+	       drawable->x, drawable->y, drawable->width, drawable->height);    
+#endif
+	
 #ifdef COMPOSITE
 	draw_x_off = pixmap->screen_x;
 	draw_y_off = pixmap->screen_y;
@@ -657,6 +689,57 @@ miPaintWindow(WindowPtr pWin, RegionPtr prgn, int what)
     ChangeGC (NullClient, pGC, gcmask, gcval);
     ValidateGC (drawable, pGC);
 
+#ifdef XQUARTZ_CLIP_DEBUG
+    ErrorF("       GC: %d %d %d %d\n",
+	   pGC->pCompositeClip->extents.x1, pGC->pCompositeClip->extents.y1,
+	   pGC->pCompositeClip->extents.x2 - pGC->pCompositeClip->extents.x1,
+	   pGC->pCompositeClip->extents.y2 - pGC->pCompositeClip->extents.y1);
+#endif
+    
+#ifdef XQUARTZ
+    /* Looks like our clipping isn't set right for some reason:
+     * http://xquartz.macosforge.org/trac/ticket/290
+     */
+    if(what == PW_BORDER) {
+
+#if 0
+	if(solid) {
+#if 1
+	    fbFillRegionSolid(&pWin->drawable,
+			      prgn,
+			      0,
+			      fbReplicatePixel(fill.pixel,
+					       pWin->drawable.bitsPerPixel));
+#else
+	    fbFillRegionSolid(drawable,
+			      prgn,
+			      0,
+			      fbReplicatePixel(fill.pixel,
+					       drawable->bitsPerPixel));
+#endif
+	    return;
+	}
+#endif
+    
+	pGC->pCompositeClip->extents.x1 += prgn->extents.x1;
+	pGC->pCompositeClip->extents.y1 += prgn->extents.y1;
+	pGC->pCompositeClip->extents.x2 += prgn->extents.x1;
+	pGC->pCompositeClip->extents.y2 += prgn->extents.y1;
+	
+	if(pGC->pCompositeClip->extents.x2 > drawable->pScreen->width)
+	    pGC->pCompositeClip->extents.x2 = drawable->pScreen->width;
+	if(pGC->pCompositeClip->extents.y2 > drawable->pScreen->height)
+	    pGC->pCompositeClip->extents.y2 = drawable->pScreen->height;
+    }
+#endif
+
+#ifdef XQUARTZ_CLIP_DEBUG
+    ErrorF("       GC: %d %d %d %d\n",
+	   pGC->pCompositeClip->extents.x1, pGC->pCompositeClip->extents.y1,
+	   pGC->pCompositeClip->extents.x2 - pGC->pCompositeClip->extents.x1,
+	   pGC->pCompositeClip->extents.y2 - pGC->pCompositeClip->extents.y1);    
+#endif
+
     numRects = RegionNumRects(prgn);
     pbox = RegionRects(prgn);
     for (i= numRects; --i >= 0; pbox++, prect++)
commit 2d83bcf9101224251946e403652a89c5c4ee9cd6
Author: Jeremy Huddleston <jeremyhu at apple.com>
Date:   Sat Oct 30 14:55:06 2010 -0700

    configure.ac: Add -fno-strict-aliasing to CFLAGS
    
    This should address https://bugs.freedesktop.org/show_bug.cgi?id=31238
    
    Signed-off-by: Jeremy Huddleston <jeremyhu at apple.com>

diff --git a/configure.ac b/configure.ac
index 9aa8211..4b572b4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -80,6 +80,12 @@ XORG_PROG_RAWCPP
 # easier overrides at build time.
 XSERVER_CFLAGS='$(CWARNFLAGS)'
 
+dnl Explicitly add -fno-strict-aliasing since this option should disappear
+dnl from util-macros CWARNFLAGS
+if  test "x$GCC" = xyes ; then
+    XSERVER_CFLAGS="$XSERVER_CFLAGS -fno-strict-aliasing"
+fi
+
 dnl Check for dtrace program (needed to build Xserver dtrace probes)
 dnl Also checks for <sys/sdt.h>, since some Linux distros have an 
 dnl ISDN trace program named dtrace
commit 79ef102c3adf7cae8982b05320109d0439e6587c
Author: Jon TURNEY <jon.turney at dronecode.org.uk>
Date:   Mon Jun 27 15:06:16 2011 +0100

    Guard use of backtrace() with HAVE_BACKTRACE
    
    Guard the use of backtrace() with HAVE_BACKTRACE, since we already
    have the autoconf machinery for setting that.
    
    For the moment, assume dladdr() is available when backtrace() is
    
    Signed-off-by: Jon TURNEY <jon.turney at dronecode.org.uk>
    Signed-off-by: Jeremy Huddleston <jeremyhu at apple.com>
    (cherry picked from commit 38d55f06cfbf4b05fee0aef8f97f90e835beaacb)

diff --git a/glx/glapi_gentable.c b/glx/glapi_gentable.c
index a9ba3af..b49ae20 100644
--- a/glx/glapi_gentable.c
+++ b/glx/glapi_gentable.c
@@ -31,7 +31,10 @@
 #include <dix-config.h>
 #endif
 
+#ifdef HAVE_BACKTRACE
 #include <execinfo.h>
+#endif
+
 #include <dlfcn.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -46,6 +49,8 @@
 static void
 __glapi_gentable_NoOp(void) {
     const char *fstr = "Unknown";
+
+#ifdef HAVE_BACKTRACE
     void *frames[2];
 
     if(backtrace(frames, 2) == 2) {
@@ -54,6 +59,7 @@ __glapi_gentable_NoOp(void) {
         if(info.dli_sname)
             fstr = info.dli_sname;
     }
+#endif
 
     LogMessage(X_ERROR, "GLX: Call to unimplemented API: %s\n", fstr);
 }
commit f0ee98584c909b503691d72c01f76602d0a28ba2
Author: Jeremy Huddleston <jeremyhu at apple.com>
Date:   Tue Jun 21 21:14:46 2011 -0700

    XQuartz: Make a call to activateIgnoringOtherApps in our NSApplicationActivatedEventType handler
    
    In addition, this change will not call into the X11 activation unless an X11
    window was active when we deactivated.  We can't rely on the event and current
    key windows because the key window will be nil until activated, and the event
    will only reference the window if the window was clicked (whereas it will be
    nil if we activated via dock or cmd-tab).
    
    Signed-off-by: Jeremy Huddleston <jeremyhu at apple.com>
    (cherry picked from commit c8b80a82d97d92d445c1c0af6dba42c9de7c56cd)

diff --git a/hw/xquartz/X11Application.m b/hw/xquartz/X11Application.m
index a5159b6..17e6b27 100644
--- a/hw/xquartz/X11Application.m
+++ b/hw/xquartz/X11Application.m
@@ -334,18 +334,21 @@ static void message_kit_thread (SEL selector, NSObject *arg) {
             
         case NSAppKitDefined:
             switch ([e subtype]) {
+                static BOOL x_was_active = NO;
+
                 case NSApplicationActivatedEventType:
                     for_x = NO;
-                    if ([self modalWindow] == nil) {
+                    if ([e window] == nil && x_was_active) {
                         BOOL order_all_windows = YES, workspaces, ok;
                         for_appkit = NO;
-                        
-                        /* FIXME: hack to avoid having to pass the event to appkit,
-                         which would cause it to raise one of its windows. */
+
+                        /* FIXME: This is a hack to avoid passing the event to AppKit which
+                         *        would result in it raising one of its windows.
+                         */
                         _appFlags._active = YES;
-                        
-                        [self activateX:YES];
-                        
+
+                        X11ApplicationSetFrontProcess();
+
                         /* Get the Spaces preference for SwitchOnActivate */
                         (void)CFPreferencesAppSynchronize(CFSTR("com.apple.dock"));
                         workspaces = CFPreferencesGetAppBooleanValue(CFSTR("workspaces"), CFSTR("com.apple.dock"), &ok);
@@ -366,8 +369,9 @@ static void message_kit_thread (SEL selector, NSObject *arg) {
                          *       If there are no active windows, and there are minimized windows, we should
                          *       be restoring one of them.
                          */
-                        if ([e data2] & 0x10) // 0x10 is set when we use cmd-tab or the dock icon
+                        if ([e data2] & 0x10) { // 0x10 (bfCPSOrderAllWindowsForward) is set when we use cmd-tab or the dock icon
                             DarwinSendDDXEvent(kXquartzBringAllToFront, 1, order_all_windows);
+                        }
                     }
                     break;
                     
@@ -377,7 +381,10 @@ static void message_kit_thread (SEL selector, NSObject *arg) {
                     
                 case NSApplicationDeactivatedEventType:
                     for_x = NO;
-                    [self activateX:NO];
+
+                    x_was_active = _x_active;
+                    if(_x_active)
+                        [self activateX:NO];
                     break;
             }
             break;
commit 1834e82b42a876195d12dda28c80004d37c4fa0c
Author: Cyril Brulebois <kibi at debian.org>
Date:   Tue May 24 18:33:11 2011 +0200

    Xext: Fix buggy checks.
    
    XvMCScreenKey is defined as XvMCScreenKeyRec's address, so will never be
    NULL. Use the check proposed by Alan Coopersmith and Jeremy Huddleston
    instead.
    
    Those warnings go away accordingly:
    |   CC     xvmc.lo
    | xvmc.c: In function 'ProcXvMCListSubpictureTypes':
    | xvmc.c:490:22: warning: the comparison will always evaluate as 'false' for the address of 'XvMCScreenKeyRec' will never be NULL [-Waddress]
    | xvmc.c: In function 'XvMCExtensionInit':
    | xvmc.c:671:21: warning: the comparison will always evaluate as 'false' for the address of 'XvMCScreenKeyRec' will never be NULL [-Waddress]
    | xvmc.c: In function 'XvMCFindXvImage':
    | xvmc.c:749:22: warning: the comparison will always evaluate as 'false' for the address of 'XvMCScreenKeyRec' will never be NULL [-Waddress]
    
    Reviewed-by: Alan Coopersmith <alan.coopersmith at oracle.com>
    Signed-off-by: Cyril Brulebois <kibi at debian.org>
    (cherry picked from commit 9da5aa09d70e26dd4d2ef878a21317dae7bf24de)

diff --git a/Xext/xvmc.c b/Xext/xvmc.c
index 8fbdfae..61ba95f 100644
--- a/Xext/xvmc.c
+++ b/Xext/xvmc.c
@@ -487,8 +487,8 @@ ProcXvMCListSubpictureTypes(ClientPtr client)
 
     pScreen = pPort->pAdaptor->pScreen;
 
-    if(XvMCScreenKey == NULL) /* No XvMC adaptors */
-        return BadMatch;
+    if (!dixPrivateKeyRegistered(XvMCScreenKey))
+        return BadMatch;   /* No XvMC adaptors */
 
     if(!(pScreenPriv = XVMC_GET_PRIVATE(pScreen)))
         return BadMatch;   /* None this screen */
@@ -668,8 +668,8 @@ XvMCExtensionInit(void)
 {
    ExtensionEntry *extEntry;
 
-   if(XvMCScreenKey == NULL) /* nobody supports it */
-	return; 
+   if (!dixPrivateKeyRegistered(XvMCScreenKey))
+	return;
 
    if(!(XvMCRTContext = CreateNewResourceType(XvMCDestroyContextRes,
 					      "XvMCRTContext")))
@@ -746,7 +746,8 @@ XvImagePtr XvMCFindXvImage(XvPortPtr pPort, CARD32 id)
     XvMCAdaptorPtr adaptor = NULL;
     int i;
 
-    if(XvMCScreenKey == NULL) return NULL;
+    if (!dixPrivateKeyRegistered(XvMCScreenKey))
+        return NULL;
 
     if(!(pScreenPriv = XVMC_GET_PRIVATE(pScreen))) 
         return NULL;


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