store SkAlphaType inside SkBitmap, on road to support unpremul

bench/RepeatTileBench.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkBenchmark.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 97 matching lines @@
     }
 
 protected:
     virtual const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
     }
 
     virtual void onPreDraw() SK_OVERRIDE {
         fBitmap.allocPixels();
         fBitmap.eraseColor(fIsOpaque ? SK_ColorWHITE : 0);
-        fBitmap.setIsOpaque(fIsOpaque);
+        fBitmap.setAlphaType(fIsOpaque ?
+                             kOpaque_SkAlphaType : kPremul_SkAlphaType);
 
         draw_into_bitmap(fBitmap);
 
         if (SkBitmap::kIndex8_Config == fConfig) {
             SkBitmap tmp;
             convert_to_index666(fBitmap, &tmp, fIsOpaque);
             fBitmap = tmp;
         }
 
         SkShader* s = SkShader::CreateBitmapShader(fBitmap,
@@ skipping 13 matching lines @@
     }
 
 private:
     typedef SkBenchmark INHERITED;
 };
 
 DEF_BENCH(return new RepeatTileBench(SkBitmap::kARGB_8888_Config, true))
 DEF_BENCH(return new RepeatTileBench(SkBitmap::kARGB_8888_Config, false))
 DEF_BENCH(return new RepeatTileBench(SkBitmap::kRGB_565_Config))
 DEF_BENCH(return new RepeatTileBench(SkBitmap::kIndex8_Config))