store SkAlphaType inside SkBitmap, on road to support unpremul

tests/BitmapHasherTest.cpp

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "Test.h"
 
 #include "SkBitmap.h"
@@ skipping 13 matching lines @@
             this->fReporter = reporter;
             RunTest();
         }
     private:
 
         // Fill in bitmap with test data.
         void CreateTestBitmap(SkBitmap &bitmap, SkBitmap::Config config, int width, int height,
                               SkColor color) {
             bitmap.setConfig(config, width, height);
             REPORTER_ASSERT(fReporter, bitmap.allocPixels());
-            bitmap.setIsOpaque(true);
+            bitmap.setAlphaType(kOpaque_SkAlphaType);
             bitmap.eraseColor(color);
         }
 
         void RunTest() {
             // Test SkBitmapHasher
             SkBitmap bitmap;
             uint64_t digest;
             // initial test case
             CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 333, 555, SK_ColorBLUE);
             REPORTER_ASSERT(fReporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
             REPORTER_ASSERT(fReporter, digest == 0xfb2903562766ef87ULL);
             // same pixel data but different dimensions should yield a different checksum
             CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 555, 333, SK_ColorBLUE);
             REPORTER_ASSERT(fReporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
             REPORTER_ASSERT(fReporter, digest == 0xfe04023fb97d0f61ULL);
             // same dimensions but different color should yield a different checksum
             CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 555, 333, SK_ColorGREEN);
             REPORTER_ASSERT(fReporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
             REPORTER_ASSERT(fReporter, digest == 0x2423c51cad6d1edcULL);
         }
 
         Reporter* fReporter;
     };
 
     static TestRegistry gReg(BitmapHasherTestClass::Factory);
 }