3 files changed, 26 insertions, 0 deletions
diff --git a/include/pixmap.h b/include/pixmap.h
index 8c523bdd9..921a94d1e 100644
--- a/include/pixmap.h
+++ b/include/pixmap.h
@@ -49,6 +49,7 @@ SOFTWARE.
 
 #include "misc.h"
 #include "screenint.h"
+#include "regionstr.h"
 
 /* types for Drawable */
 #define DRAWABLE_WINDOW 0
@@ -73,6 +74,8 @@ SOFTWARE.
 typedef struct _Drawable *DrawablePtr;
 typedef struct _Pixmap *PixmapPtr;
 
+typedef struct _PixmapDirtyUpdate *PixmapDirtyUpdatePtr;
+
 typedef union _PixUnion {
     PixmapPtr pixmap;
     unsigned long pixel;
@@ -112,4 +115,17 @@ extern _X_EXPORT void FreePixmap(PixmapPtr /*pPixmap */ );
 extern _X_EXPORT PixmapPtr
 PixmapShareToSlave(PixmapPtr pixmap, ScreenPtr slave);
 
+extern _X_EXPORT Bool
+PixmapStartDirtyTracking(PixmapPtr src,
+                         PixmapPtr slave_dst,
+                         int x, int y);
+
+extern _X_EXPORT Bool
+PixmapStopDirtyTracking(PixmapPtr src, PixmapPtr slave_dst);
+
+/* helper function, drivers can do this themselves if they can do it more
+   efficently */
+extern _X_EXPORT Bool
+PixmapSyncDirtyHelper(PixmapDirtyUpdatePtr dirty, RegionPtr dirty_region);
+
 #endif                          /* PIXMAP_H */
diff --git a/include/pixmapstr.h b/include/pixmapstr.h
index 40af5c4a3..2a1ef9b85 100644
--- a/include/pixmapstr.h
+++ b/include/pixmapstr.h
@@ -50,6 +50,7 @@ SOFTWARE.
 #include "screenint.h"
 #include "regionstr.h"
 #include "privates.h"
+#include "damage.h"
 
 typedef struct _Drawable {
     unsigned char type;         /* DRAWABLE_<type> */
@@ -84,6 +85,13 @@ typedef struct _Pixmap {
     PixmapPtr master_pixmap;    /* pointer to master copy of pixmap for pixmap sharing */
 } PixmapRec;
 
+typedef struct _PixmapDirtyUpdate {
+    PixmapPtr src, slave_dst;
+    int x, y;
+    DamagePtr damage;
+    struct xorg_list ent;
+} PixmapDirtyUpdateRec;
+
 static inline void
 PixmapBox(BoxPtr box, PixmapPtr pixmap)
 {
diff --git a/include/scrnintstr.h b/include/scrnintstr.h
index 3a738d3b0..5ef37ed9a 100644
--- a/include/scrnintstr.h
+++ b/include/scrnintstr.h
@@ -505,6 +505,8 @@ typedef struct _Screen {
 
     StartPixmapTrackingProcPtr StartPixmapTracking;
     StopPixmapTrackingProcPtr StopPixmapTracking;
+
+    struct xorg_list pixmap_dirty_list;
 } ScreenRec;
 
 static inline RegionPtr