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+/* $XFree86: xc/programs/Xserver/hw/xfree86/shadowfb/shadowfb.h,v 1.4 2003/02/18 19:10:35 alanh Exp $ */
+
+#ifndef _SHADOWFB_H
+#define _SHADOWFB_H
+
+#include "xf86str.h"
+
+/*
+ * User defined callback function. Passed a pointer to the ScrnInfo struct,
+ * the number of dirty rectangles, and a pointer to the first dirty rectangle
+ * in the array.
+ */
+typedef void (*RefreshAreaFuncPtr)(ScrnInfoPtr, int, BoxPtr);
+
+/*
+ * ShadowFBInit initializes the shadowfb subsystem. refreshArea is a pointer
+ * to a user supplied callback function. This function will be called after
+ * any operation that modifies the framebuffer. The newly dirtied rectangles
+ * are passed to the callback.
+ *
+ * Returns FALSE in the event of an error.
+ */
+Bool
+ShadowFBInit (
+ ScreenPtr pScreen,
+ RefreshAreaFuncPtr refreshArea
+);
+
+/*
+ * ShadowFBInit2 is a more featureful refinement of the original shadowfb.
+ * ShadowFBInit2 allows you to specify two callbacks, one to be called
+ * immediately before an operation that modifies the framebuffer, and another
+ * to be called immediately after.
+ *
+ * Returns FALSE in the event of an error
+ */
+Bool
+ShadowFBInit2 (
+ ScreenPtr pScreen,
+ RefreshAreaFuncPtr preRefreshArea,
+ RefreshAreaFuncPtr postRefreshArea
+);
+
+#endif /* _SHADOWFB_H */