Add unpremultiply support and GM

src/pdf/SkPDFImage.h

 
 /*
  * Copyright 2010 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 SkPDFImage_DEFINED
@@ skipping 82 matching lines @@
     SkPDFImage(SkPDFImage& pdfImage);
 
     /** Initialize the image XObject parameters based on fBitmap and
      *  fSrcRect, which MUST have been initialized before calling this.
      *  Image data is not touched.
      *  @param isAlpha    Whether or not this image is the alpha channel
      *                    (SMask) for another image XObject.
      */
     void initImageParams(bool isAlpha);
 
+    /** Initialize my bitmap field from a source bitmap. Does a deep copy
+     *  if the source is not iummutable - guarantees my copy is consistent
+     *  for the duration of its lifetime.
+     */
+    void initBitmap(const SkBitmap& bitmap);
+
     // Populate the stream dictionary.  This method returns false if
     // fSubstitute should be used.
     virtual bool populate(SkPDFCatalog* catalog);
 
     typedef SkPDFStream INHERITED;
 };
 
 #endif