store SkAlphaType inside SkBitmap, on road to support unpremul

src/views/SkWindow.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 "SkWindow.h"
 #include "SkCanvas.h"
 #include "SkDevice.h"
@@ skipping 84 matching lines @@
 }
 
 void SkWindow::resize(int width, int height, SkBitmap::Config config)
 {
     if (config == SkBitmap::kNo_Config)
         config = fConfig;
 
     if (width != fBitmap.width() || height != fBitmap.height() || config != fConfig)
     {
         fConfig = config;
-        fBitmap.setConfig(config, width, height);
+        fBitmap.setConfig(config, width, height, 0, kOpaque_SkAlphaType);
         fBitmap.allocPixels();
-        fBitmap.setIsOpaque(true);
 
         this->setSize(SkIntToScalar(width), SkIntToScalar(height));
         this->inval(NULL);
     }
 }
 
 void SkWindow::eraseARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b)
 {
     fBitmap.eraseARGB(a, r, g, b);
 }
@@ skipping 288 matching lines @@
                 fClicks.remove(index);
                 handled = true;
             }
             break;
         default:
             // Do nothing
             break;
     }
     return handled;
 }