XFree86: Xv: Add ClipNotify helper

Add a ClipNotify helper that lets the driver know about changes in the
clipping of an Xv backing drawable.

Signed-off-by: Daniel Stone <daniel@fooishbar.org>

hw/xfree86/common/xf86xv.c

@@ -1123,6 +1123,10 @@ xf86XVClipNotify(WindowPtr pWin, int dx, int dy)
 
      pPriv->pCompositeClip = NULL;
 
+     if (pPriv->AdaptorRec->ClipNotify)
+        (*pPriv->AdaptorRec->ClipNotify)(pPriv->pScrn, pPriv->DevPriv.ptr,
+                                         pWin, dx, dy);
+
      /* Stop everything except images, but stop them too if the
 	window isn't visible.  But we only remove the images. */
 

hw/xfree86/common/xf86xv.h

@@ -112,6 +112,8 @@ typedef int (* ReputImageFuncPtr)( ScrnInfoPtr pScrn, short drw_x, short drw_y,
 typedef int (*QueryImageAttributesFuncPtr)(ScrnInfoPtr pScrn, 
 	int image, unsigned short *width, unsigned short *height, 
 	int *pitches, int *offsets);
+typedef void (*ClipNotifyFuncPtr)(ScrnInfoPtr pScrn, pointer data,
+                                  WindowPtr window, int dx, int dy);
 
 typedef enum {
     XV_OFF,
@@ -165,6 +167,7 @@ typedef struct {
   PutImageFuncPtr PutImage;
   ReputImageFuncPtr ReputImage;
   QueryImageAttributesFuncPtr QueryImageAttributes;
+  ClipNotifyFuncPtr ClipNotify;
 } XF86VideoAdaptorRec, *XF86VideoAdaptorPtr;
 
 typedef struct {

hw/xfree86/common/xf86xvpriv.h

@@ -59,6 +59,7 @@ typedef struct {
   PutImageFuncPtr PutImage;
   ReputImageFuncPtr ReputImage;
   QueryImageAttributesFuncPtr QueryImageAttributes;
+  ClipNotifyFuncPtr ClipNotify;
 } XvAdaptorRecPrivate, *XvAdaptorRecPrivatePtr;
 
 typedef struct {