Add image->bitmap

src/image/SkImage_Raster.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImage_Base.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 61 matching lines @@
     SkImage_Raster(const SkImageInfo&, SkPixelRef*, const SkIPoint& pixelRefOrigin, size_t rowBytes,
                    const SkSurfaceProps*);
 
     SkPixelRef* getPixelRef() const { return fBitmap.pixelRef(); }
 
     SkShader* onNewShader(SkShader::TileMode,
                           SkShader::TileMode,
                           const SkMatrix* localMatrix) const override;
 
     bool isOpaque() const override;
+    bool onAsLegacyBitmap(SkBitmap*, LegacyBitmapMode) const override;
 
     SkImage_Raster(const SkBitmap& bm, const SkSurfaceProps* props)
         : INHERITED(bm.width(), bm.height(), props)
         , fBitmap(bm) {}
 
 private:
     SkImage_Raster() : INHERITED(0, 0, NULL) {}
 
     SkBitmap    fBitmap;
 
@@ skipping 163 matching lines @@
 }
 
 const SkPixelRef* SkBitmapImageGetPixelRef(const SkImage* image) {
     return ((const SkImage_Raster*)image)->getPixelRef();
 }
 
 bool SkImage_Raster::isOpaque() const {
     return fBitmap.isOpaque();
 }
 
+bool SkImage_Raster::onAsLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode mode) const {
+    if (kRO_LegacyBitmapMode == mode) {
+        // When we're a snapshot from a surface, our bitmap may not be marked immutable
+        // even though logically always we are, but in that case we can't physically share our
+        // pixelref since the caller might call setImmutable() themselves
+        // (thus changing our state).
+        if (fBitmap.isImmutable()) {
+            bitmap->setInfo(fBitmap.info());
+            bitmap->setPixelRef(fBitmap.pixelRef(), fBitmap.pixelRefOrigin());
+            return true;
+        }
+    }
+    return this->INHERITED::onAsLegacyBitmap(bitmap, mode);
+}