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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 "SkBitmap.h"
#include "SkMipMap.h"
class SkImage;
class SkResourceCache;
uint64_t SkMakeResourceCacheSharedIDForBitmap(uint32_t bitmapGenID);
void SkNotifyBitmapGenIDIsStale(uint32_t bitmapGenID);
struct SkBitmapCacheDesc {
uint32_t fImageID; // != 0
int32_t fScaledWidth; // 0 for unscaled
int32_t fScaledHeight; // 0 for unscaled
SkIRect fSubset; // always set to a valid rect (entire or subset)
void validate() const {
SkASSERT(fImageID);
if (fScaledWidth || fScaledHeight) {
SkASSERT(fScaledWidth && fScaledHeight);
}
SkASSERT(fSubset.fLeft >= 0 && fSubset.fTop >= 0);
SkASSERT(fSubset.width() > 0 && fSubset.height() > 0);
}
static SkBitmapCacheDesc Make(const SkBitmap&, int scaledWidth, int scaledHeight);
static SkBitmapCacheDesc Make(const SkBitmap&);
static SkBitmapCacheDesc Make(const SkImage*, int scaledWidth, int scaledHeight);
static SkBitmapCacheDesc Make(const SkImage*);
// Use with care -- width/height must match the original bitmap/image
static SkBitmapCacheDesc Make(uint32_t genID, int origWidth, int origHeight);
};
class SkBitmapCache {
public:
/**
* Search based on the desc. If found, returns true and
* result will be set to the matching bitmap with its pixels already locked.
*/
static bool Find(const SkBitmapCacheDesc&, SkBitmap* result);
class Rec;
struct RecDeleter { void operator()(Rec* r) { PrivateDeleteRec(r); } };
typedef std::unique_ptr<Rec, RecDeleter> RecPtr;
static RecPtr Alloc(const SkBitmapCacheDesc&, const SkImageInfo&, SkPixmap*);
static void Add(RecPtr, SkBitmap*);
private:
static void PrivateDeleteRec(Rec*);
};
class SkMipMapCache {
public:
// Note: the scaled width/height in desc must be 0, as any other value would not make sense.
static const SkMipMap* FindAndRef(const SkBitmapCacheDesc&,
SkResourceCache* localCache = nullptr);
static const SkMipMap* AddAndRef(const SkBitmap& src, SkResourceCache* localCache = nullptr);
};
#endif
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