Add SkImage->draw() call with src and dst rects.

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 64 matching lines @@
      * Return the GrTexture that stores the image pixels. Calling getTexture
      * does not affect the reference count of the GrTexture object.
      * Will return NULL if the image does not use a texture.
      */
     GrTexture* getTexture();
 
     SkShader*   newShaderClamp() const;
     SkShader*   newShader(SkShader::TileMode, SkShader::TileMode) const;
 
     void draw(SkCanvas*, SkScalar x, SkScalar y, const SkPaint*);
-
+    void draw(SkCanvas*, SkRect src, SkRect dst, const SkPaint*);

[Justin Novosad, 2013/07/18 21:54:37]

Use "const SkRect&" for src and dst

[reed1, 2013/07/19 14:03:45]

How about

const SkRect* src
const SkRect& dst

So the src rect can be optional

+    
     /**
      *  Encode the image's pixels and return the result as a new SkData, which
      *  the caller must manage (i.e. call unref() when they are done).
      *
      *  If the image type cannot be encoded, or the requested encoder type is
      *  not supported, this will return NULL.
      */
     SkData* encode(SkImageEncoder::Type t = SkImageEncoder::kPNG_Type,
                    int quality = 80) const;
 
@@ skipping 11 matching lines @@
     const int       fWidth;
     const int       fHeight;
     const uint32_t  fUniqueID;
 
     static uint32_t NextUniqueID();
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif