add drawImageNine

include/core/SkCanvas.h

Index: include/core/SkCanvas.h
diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index 7bdb6d219ca4bb5f89d1b57bfcc6127810fdd052..7bff02a6a938ca0a644770f06f989822e8ce0791 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -792,6 +792,23 @@ public:
     void drawImageRect(const SkImage* image, const SkRect* src, const SkRect& dst,
                        const SkPaint* paint = NULL);
 
+    /**
+     *  Draw the image stretched differentially to fit into dst.
+     *  center is a rect within the image, and logically divides the image
+     *  into 9 sections (3x3). For example, if the middle pixel of a [5x5]
+     *  image is the "center", then the center-rect should be [2, 2, 3, 3].
+     *
+     *  If the dst is >= the image size, then...
+     *  - The 4 corners are not stretched at all.
+     *  - The sides are stretched in only one axis.
+     *  - The center is stretched in both axes.
+     * Else, for each axis where dst < image,
+     *  - The corners shrink proportionally
+     *  - The sides (along the shrink axis) and center are not drawn
+     */
+    void drawImageNine(const SkImage*, const SkIRect& center, const SkRect& dst,
+                        const SkPaint* paint = NULL);
+
     /** Draw the specified bitmap, with its top/left corner at (x,y), using the
         specified paint, transformed by the current matrix. Note: if the paint
         contains a maskfilter that generates a mask which extends beyond the
@@ -1230,6 +1247,9 @@ protected:
     virtual void onDrawPath(const SkPath&, const SkPaint&);
     virtual void onDrawImage(const SkImage*, SkScalar dx, SkScalar dy, const SkPaint*);
     virtual void onDrawImageRect(const SkImage*, const SkRect*, const SkRect&, const SkPaint*);
+    virtual void onDrawImageNine(const SkImage*, const SkIRect& center, const SkRect& dst,
+                                 const SkPaint*);
+
     virtual void onDrawBitmap(const SkBitmap&, SkScalar dx, SkScalar dy, const SkPaint*);
     virtual void onDrawBitmapRect(const SkBitmap&, const SkRect*, const SkRect&, const SkPaint*,
                                   DrawBitmapRectFlags);
@@ -1347,8 +1367,6 @@ private:
     void internalDrawBitmapRect(const SkBitmap& bitmap, const SkRect* src,
                                 const SkRect& dst, const SkPaint* paint,
                                 DrawBitmapRectFlags flags);
-    void internalDrawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
-                                const SkRect& dst, const SkPaint* paint);
     void internalDrawPaint(const SkPaint& paint);
     void internalSaveLayer(const SkRect* bounds, const SkPaint*, SaveFlags, SaveLayerStrategy);
     void internalDrawDevice(SkBaseDevice*, int x, int y, const SkPaint*, bool isBitmapDevice);