change SkDraw and all Blitters to use pixmap instead of bitmap

src/core/SkBlitMask_D32.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBlitMask.h"
 #include "SkColor.h"
 #include "SkColorPriv.h"
@@ skipping 129 matching lines @@
                 default:
                     break;
             }
             break;
         default:
             break;
     }
     return NULL;
 }
 
-bool SkBlitMask::BlitColor(const SkBitmap& device, const SkMask& mask,
+bool SkBlitMask::BlitColor(const SkPixmap& device, const SkMask& mask,
                            const SkIRect& clip, SkColor color) {
     ColorProc proc = ColorFactory(device.colorType(), mask.fFormat, color);
     if (proc) {
         int x = clip.fLeft;
         int y = clip.fTop;
-        proc(device.getAddr32(x, y), device.rowBytes(), mask.getAddr(x, y),
+        proc(device.writable_addr32(x, y), device.rowBytes(), mask.getAddr(x, y),
              mask.fRowBytes, color, clip.width(), clip.height());
         return true;
     }
     return false;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
 
 static void BW_RowProc_Blend(SkPMColor* SK_RESTRICT dst,
@@ skipping 222 matching lines @@
             if (flags & kSrcIsOpaque_RowFlag) {
                 index |= 1;
             }
             SkASSERT((size_t)index < SK_ARRAY_COUNT(gProcs));
             return gProcs[index];
         default:
             break;
     }
     return NULL;
 }