Adding anisotropic mipmap levels to SkMipMap.

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 107 matching lines @@
         {-100, -100, 0},
 
         // Test mipmaps with 0, 1, 2 as dimensions
         // (SkMipMap::Build requires a min size of 2)
         //
         // 0
         {0, 100, 0},
         {100, 0, 0},
         {0, 0, 0},
         // 1
-        {1, 100, 0},
-        {100, 1, 0},
+        {1, 100, 6},
+        {100, 1, 6},
         {1, 1, 0},
         // 2
-        {2, 100, 1},
-        {100, 2, 1},
+        {2, 100, 6},
+        {100, 2, 6},
         {2, 2, 1},
 
         // Test a handful of boundaries such as 63x63 and 64x64
         {63, 63, 5},
         {64, 64, 6},
         {127, 127, 6},
         {128, 128, 7},
         {255, 255, 7},
         {256, 256, 8},
 
         // Test different dimensions, such as 256x64
-        {64, 129, 6},
-        {255, 32, 5},
-        {500, 1000, 8}
+        {64, 129, 7},
+        {255, 32, 7},
+        {500, 1000, 9}
     };
 
     for (auto& currentTest : tests) {
         int levelCount = SkMipMap::ComputeLevelCount(currentTest.fWidth, currentTest.fHeight);
         REPORTER_ASSERT(reporter, currentTest.fExpectedLevelCount == levelCount);
     }
 }