use pixmaps in mipmap api

gm/showmiplevels.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 
 #include "Resources.h"
@@ skipping 133 matching lines @@
         SkPixmap prevPM;
         baseBM.lockPixels();
         baseBM.peekPixels(&prevPM);
 
         SkAutoTUnref<SkMipMap> mm(SkMipMap::Build(baseBM, nullptr));
 
         int index = 0;
         SkMipMap::Level level;
         SkScalar scale = 0.5f;
         while (mm->extractLevel(scale, &level)) {
-            SkImageInfo info = SkImageInfo::Make(level.fWidth, level.fHeight,
-                                                 baseBM.colorType(), baseBM.alphaType());
-            SkPixmap levelPM{ info, level.fPixels, level.fRowBytes };
-
-            SkBitmap bm = func(prevPM, levelPM);
+            SkBitmap bm = func(prevPM, level.fPixmap);
             DrawAndFrame(canvas, bm, x, y);
 
-            if (info.width() <= 2 || info.height() <= 2) {
+            if (level.fPixmap.width() <= 2 || level.fPixmap.height() <= 2) {
                 break;
             }
             if (index & 1) {
-                x += info.width() + 4;
+                x += level.fPixmap.width() + 4;
             } else {
-                y += info.height() + 4;
+                y += level.fPixmap.height() + 4;
             }
             scale /= 2;
-            prevPM = levelPM;
+            prevPM = level.fPixmap;
             index += 1;
         }
     }
 
     void drawSet(SkCanvas* canvas, const SkBitmap& orig) {
         SkAutoCanvasRestore acr(canvas, true);
 
         drawLevels(canvas, orig, [](const SkPixmap& prev, const SkPixmap& curr) {
             SkBitmap bm;
             bm.installPixels(curr);
@@ skipping 75 matching lines @@
     void drawLevels(SkCanvas* canvas, const SkBitmap& baseBM) {
         SkScalar x = 4;
         SkScalar y = 4;
 
         SkAutoTUnref<SkMipMap> mm(SkMipMap::Build(baseBM, nullptr));
 
         int index = 0;
         SkMipMap::Level level;
         SkScalar scale = 0.5f;
         while (mm->extractLevel(scale, &level)) {
-            SkImageInfo info = SkImageInfo::Make(level.fWidth, level.fHeight,
-                                                 baseBM.colorType(), baseBM.alphaType());
-
             SkBitmap bm;
-            bm.installPixels(info, level.fPixels, level.fRowBytes);
+            bm.installPixels(level.fPixmap);
             DrawAndFrame(canvas, bm, x, y);
 
-            if (info.width() <= 2 || info.height() <= 2) {
+            if (level.fPixmap.width() <= 2 || level.fPixmap.height() <= 2) {
                 break;
             }
             if (index & 1) {
-                x += info.width() + 4;
+                x += level.fPixmap.width() + 4;
             } else {
-                y += info.height() + 4;
+                y += level.fPixmap.height() + 4;
             }
             scale /= 2;
             index += 1;
         }
     }
 
     void drawSet(SkCanvas* canvas, const SkBitmap& orig) {
         const SkColorType ctypes[] = {
             kN32_SkColorType, kRGB_565_SkColorType, kARGB_4444_SkColorType, kGray_8_SkColorType
         };
@@ skipping 19 matching lines @@
         }
     }
     
 private:
     typedef skiagm::GM INHERITED;
 };
 DEF_GM( return new ShowMipLevels2(255, 255); )
 DEF_GM( return new ShowMipLevels2(256, 255); )
 DEF_GM( return new ShowMipLevels2(255, 256); )
 DEF_GM( return new ShowMipLevels2(256, 256); )