diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/core/SkMipMap.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/src/core/SkMipMap.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkMipMap_DEFINED
+#define SkMipMap_DEFINED
+
+#include "SkRefCnt.h"
+#include "SkScalar.h"
+
+class SkBitmap;
+
+class SkMipMap : public SkRefCnt {
+public:
+    static SkMipMap* Build(const SkBitmap& src);
+
+    struct Level {
+        void*       fPixels;
+        uint32_t    fRowBytes;
+        uint32_t    fWidth, fHeight;
+        float       fScale; // < 1.0
+    };
+
+    bool extractLevel(SkScalar scale, Level*) const;
+
+    size_t getSize() const { return fSize; }
+
+private:
+    size_t  fSize;
+    Level*  fLevels;
+    int     fCount;
+
+    // we take ownership of levels, and will free it with sk_free()
+    SkMipMap(Level* levels, int count, size_t size);
+    virtual ~SkMipMap();
+
+    static Level* AllocLevels(int levelCount, size_t pixelSize);
+};
+
+#endif