Add image->bitmap

include/core/SkImage.h

Index: include/core/SkImage.h
diff --git a/include/core/SkImage.h b/include/core/SkImage.h
index 41a1bd85272f163bb5e5a2135ad353ff92cf897b..f623c1f4f378e5dc6fedf2853e7f4d6d9c6f4641 100644
--- a/include/core/SkImage.h
+++ b/include/core/SkImage.h
@@ -264,6 +264,27 @@ public:
     SkImage* newImage(int newWidth, int newHeight, const SkIRect* subset = NULL,
                       SkFilterQuality = kNone_SkFilterQuality) const;
 
+    // Helper functions to convert to SkBitmap
+
+    enum AsBitmapMode {
+        kRO_AsBitmapMode,
+        kRW_AsBitmapMode,
+    };
+
+    /**
+     *  Attempt to create a bitmap with the same pixels as the image.
+     *
+     *  If the mode is kRO (read-only), an attempt will be made to share the actual pixel memory,
+     *  skipping the cost of a copy. If this can be done, the returned bitmap will be marked
+     *  immutable.
+     *
+     *  If it cannot, or if the mode is kRW (read-write), then a copy of the pixels will be made.
+     *

[robertphillips, 2015/07/08 15:41:26]

success

[reed1, 2015/07/08 19:14:43]

Done.

+     *  On succces, returns true. On failure, returns false and the bitmap parameter will be reset
+     *  to empty.
+     */
+    bool asBitmap(SkBitmap*, AsBitmapMode = kRO_AsBitmapMode) const;
+    
 protected:
     SkImage(int width, int height) :
         fWidth(width),