Bug 380071 - add cairo_clip_extents() functionality to thebes. r=vlad

gfx/thebes/public/gfxContext.h

@@ -503,7 +503,12 @@ public:
      * Useful if you are doing native drawing.
      */
     void UpdateSurfaceClip();
-    
+
+    /**
+     * This will return the current bounds of the clip region.
+     */
+    gfxRect GetClipExtents();
+
     /**
      * Groups
      */

gfx/thebes/src/gfxContext.cpp

@@ -593,6 +593,14 @@ gfxContext::UpdateSurfaceClip()
     Fill();
 }
 
+gfxRect
+gfxContext::GetClipExtents()
+{
+    double xmin, ymin, xmax, ymax;
+    cairo_clip_extents(mCairo, &xmin, &ymin, &xmax, &ymax);
+    return gfxRect(xmin, ymin, xmax - xmin, ymax - ymin);
+}
+
 // rendering sources
 
 void