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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkBitmapCache_DEFINED
#define SkBitmapCache_DEFINED
#include "SkScalar.h"
#include "SkBitmap.h"
class SkResourceCache;
class SkMipMap;
uint64_t SkMakeResourceCacheSharedIDForBitmap(uint32_t bitmapGenID);
void SkNotifyBitmapGenIDIsStale(uint32_t bitmapGenID);
class SkBitmapCache {
public:
/**
* Use this allocator for bitmaps, so they can use ashmem when available.
* Returns nullptr if the ResourceCache has not been initialized with a DiscardableFactory.
*/
static SkBitmap::Allocator* GetAllocator();
/**
* Search based on the src bitmap and scaled width/height. If found, returns true and
* result will be set to the matching bitmap with its pixels already locked.
*/
static bool FindWH(const SkBitmap& src, int width, int height, SkBitmap* result,
SkResourceCache* localCache = nullptr);
/*
* result must be marked isImmutable()
*/
static void AddWH(const SkBitmap& src, int width, int height, const SkBitmap& result,
SkResourceCache* localCache = nullptr);
/**
* Search based on the bitmap's genID and subset. If found, returns true and
* result will be set to the matching bitmap with its pixels already locked.
*/
static bool Find(uint32_t genID, const SkIRect& subset, SkBitmap* result,
SkResourceCache* localCache = nullptr);
/**
* The width and the height of the provided subset must be the same as the result bitmap ones.
* result must be marked isImmutable()
*/
static bool Add(SkPixelRef*, const SkIRect& subset, const SkBitmap& result,
SkResourceCache* localCache = nullptr);
static bool Find(uint32_t genID, SkBitmap* result, SkResourceCache* localCache = nullptr);
// todo: eliminate the need to specify ID, since it should == the bitmap's
static void Add(uint32_t genID, const SkBitmap&, SkResourceCache* localCache = nullptr);
};
class SkMipMapCache {
public:
static const SkMipMap* FindAndRef(const SkBitmap& src, SkResourceCache* localCache = nullptr);
static const SkMipMap* AddAndRef(const SkBitmap& src, SkResourceCache* localCache = nullptr);
};
#endif
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