| /* |
| * 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 "SkCachedData.h" |
| #include "SkScalar.h" |
| |
| class SkBitmap; |
| class SkDiscardableMemory; |
| |
| typedef SkDiscardableMemory* (*SkDiscardableFactoryProc)(size_t bytes); |
| |
| class SkMipMap : public SkCachedData { |
| public: |
| static SkMipMap* Build(const SkBitmap& src, SkDiscardableFactoryProc); |
| |
| struct Level { |
| void* fPixels; |
| uint32_t fRowBytes; |
| uint32_t fWidth, fHeight; |
| float fScale; // < 1.0 |
| }; |
| |
| bool extractLevel(SkScalar scale, Level*) const; |
| |
| protected: |
| void onDataChange(void* oldData, void* newData) override { |
| fLevels = (Level*)newData; // could be NULL |
| } |
| |
| private: |
| Level* fLevels; |
| int fCount; |
| |
| // we take ownership of levels, and will free it with sk_free() |
| SkMipMap(void* malloc, size_t size) : INHERITED(malloc, size) {} |
| SkMipMap(size_t size, SkDiscardableMemory* dm) : INHERITED(size, dm) {} |
| |
| static size_t AllocLevelsSize(int levelCount, size_t pixelSize); |
| |
| typedef SkCachedData INHERITED; |
| }; |
| |
| #endif |