use pixmaps in mipmap api

tests/MipMapTest.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 "SkBitmap.h"
 #include "SkMipMap.h"
 #include "SkRandom.h"
@@ skipping 21 matching lines @@
 
         SkMipMap::Level prevLevel;
         sk_bzero(&prevLevel, sizeof(prevLevel));
 
         SkScalar scale = SK_Scalar1;
         for (int j = 0; j < 30; ++j) {
             scale = scale * 2 / 3;
 
             SkMipMap::Level level;
             if (mm->extractLevel(scale, &level)) {
-                REPORTER_ASSERT(reporter, level.fPixels);
-                REPORTER_ASSERT(reporter, level.fWidth > 0);
-                REPORTER_ASSERT(reporter, level.fHeight > 0);
-                REPORTER_ASSERT(reporter, level.fRowBytes >= level.fWidth * 4);
+                REPORTER_ASSERT(reporter, level.fPixmap.addr());
+                REPORTER_ASSERT(reporter, level.fPixmap.width() > 0);
+                REPORTER_ASSERT(reporter, level.fPixmap.height() > 0);
+                REPORTER_ASSERT(reporter, (int)level.fPixmap.rowBytes() >= level.fPixmap.width() * 4);
 
-                if (prevLevel.fPixels) {
-                    REPORTER_ASSERT(reporter, level.fWidth <= prevLevel.fWidth);
-                    REPORTER_ASSERT(reporter, level.fHeight <= prevLevel.fHeight);
+                if (prevLevel.fPixmap.addr()) {
+                    REPORTER_ASSERT(reporter, level.fPixmap.width() <= prevLevel.fPixmap.width());
+                    REPORTER_ASSERT(reporter, level.fPixmap.height() <= prevLevel.fPixmap.height());
                 }
                 prevLevel = level;
             }
         }
     }
 }