diff --git a/src/video/cocoa/cocoa_v.h b/src/video/cocoa/cocoa_v.h
--- a/src/video/cocoa/cocoa_v.h
+++ b/src/video/cocoa/cocoa_v.h
@@ -47,6 +47,11 @@ public:
 	 */
 	/* virtual */ bool ToggleFullscreen(bool fullscreen);
 
+	/** Callback invoked after the blitter was changed.
+	 * @return True if no error.
+	 */
+	/* virtual */ bool AfterBlitterChange();
+
 	/** Return driver name
 	 * @return driver name
 	 */
@@ -123,7 +128,7 @@ public:
 	 * @param h New window height
 	 * @return Whether change was successful
 	 */
-	virtual bool ChangeResolution(int w, int h) = 0;
+	virtual bool ChangeResolution(int w, int h, int bpp) = 0;
 
 	/** Are we in fullscreen mode
 	 * @return whether fullscreen mode is currently used