Break up SkLazyPixelRef functionally into class hierarchy.

include/core/SkBitmap.h

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkBitmap_DEFINED
 #define SkBitmap_DEFINED
 
 #include "Sk64.h"
 #include "SkAlpha.h"
 #include "SkColor.h"
 #include "SkColorTable.h"
 #include "SkPoint.h"
 #include "SkRefCnt.h"
 
+struct SkImageInfo;
 struct SkIRect;
 struct SkRect;
 class SkPaint;
 class SkPixelRef;
 class SkRegion;
 class SkString;
 
 class GrTexture;
 
 /** \class SkBitmap
@@ skipping 222 matching lines @@
         ComputeRowBytes() is called to compute the optimal value. This resets
         any pixel/colortable ownership, just like reset().
     */
     bool setConfig(Config, int width, int height, size_t rowBytes, SkAlphaType);
 
     bool setConfig(Config config, int width, int height, size_t rowBytes = 0) {
         return this->setConfig(config, width, height, rowBytes,
                                kPremul_SkAlphaType);
     }
 
+    bool setConfig(const SkImageInfo& info, size_t rowBytes = 0);
 
     /** Use this to assign a new pixel address for an existing bitmap. This
         will automatically release any pixelref previously installed. Only call
         this if you are handling ownership/lifetime of the pixel memory.
 
         If the bitmap retains a reference to the colortable (assuming it is
         not null) it will take care of incrementing the reference count.
 
         @param pixels   Address for the pixels, managed by the caller.
         @param ctable   ColorTable (or null) that matches the specified pixels
@@ skipping 549 matching lines @@
 
 // returns the address of the byte that contains the x coordinate
 inline uint8_t* SkBitmap::getAddr1(int x, int y) const {
     SkASSERT(fPixels);
     SkASSERT(fConfig == kA1_Config);
     SkASSERT((unsigned)x < fWidth && (unsigned)y < fHeight);
     return (uint8_t*)fPixels + y * fRowBytes + (x >> 3);
 }
 
 #endif