add SkImage::NewFromBitmap

include/core/SkImage.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImage_DEFINED
 #define SkImage_DEFINED
 
@@ skipping 44 matching lines @@
      *  Return a new Image referencing the specified pixels. These must remain valid and unchanged
      *  until the specified release-proc is called, indicating that Skia no longer has a reference
      *  to the pixels.
      *
      *  Returns NULL if the requested Info is unsupported.
      */
     static SkImage* NewFromRaster(const Info&, const void* pixels, size_t rowBytes,
                                   RasterReleaseProc, ReleaseContext);
 
     /**
+     *  Construct a new image from the specified bitmap. If the bitmap is marked immutable, and

[robertphillips, 2015/07/06 20:43:47]

Supposedly "shareable" prevails by a 2:1 margin in American texts

[reed2, 2015/07/07 01:18:03]

Done.

+     *  its pixel memory is sharable, it may be shared instead of copied.
+     */
+    static SkImage* NewFromBitmap(const SkBitmap&);
+    
+    /**
      *  Construct a new SkImage based on the given ImageGenerator.
      *  This function will always take ownership of the passed
      *  ImageGenerator.  Returns NULL on error.
      *
      *  If a subset is specified, it must be contained within the generator's bounds.
      */
     static SkImage* NewFromGenerator(SkImageGenerator*, const SkIRect* subset = NULL);
 
     /**
      *  Construct a new SkImage based on the specified encoded data. Returns NULL on failure,
@@ skipping 197 matching lines @@
     const int       fWidth;
     const int       fHeight;
     const uint32_t  fUniqueID;
 
     static uint32_t NextUniqueID();
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif