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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_HWUI_RESOURCE_CACHE_H
#define ANDROID_HWUI_RESOURCE_CACHE_H
#include <cutils/compiler.h>
#include <SkBitmap.h>
#include <SkPath.h>
#include <SkPixelRef.h>
#include <utils/KeyedVector.h>
#include <utils/Singleton.h>
#include <androidfw/ResourceTypes.h>
namespace android {
namespace uirenderer {
class Layer;
/**
* Type of Resource being cached
*/
enum ResourceType {
kNinePatch,
kPath
};
class ResourceReference {
public:
ResourceReference(ResourceType type) {
refCount = 0; destroyed = false; resourceType = type;
}
int refCount;
bool destroyed;
ResourceType resourceType;
};
class BitmapKey {
public:
BitmapKey(const SkBitmap* bitmap)
: mRefCount(1)
, mBitmapDimensions(bitmap->dimensions())
, mPixelRefOrigin(bitmap->pixelRefOrigin())
, mPixelRefStableID(bitmap->pixelRef()->getStableID()) { }
void operator=(const BitmapKey& other);
bool operator==(const BitmapKey& other) const;
bool operator<(const BitmapKey& other) const;
private:
// This constructor is only used by the KeyedVector implementation
BitmapKey()
: mRefCount(-1)
, mBitmapDimensions(SkISize::Make(0,0))
, mPixelRefOrigin(SkIPoint::Make(0,0))
, mPixelRefStableID(0) { }
// reference count of all HWUI object using this bitmap
mutable int mRefCount;
SkISize mBitmapDimensions;
SkIPoint mPixelRefOrigin;
uint32_t mPixelRefStableID;
friend class ResourceCache;
friend struct android::key_value_pair_t<BitmapKey, SkBitmap*>;
};
class ANDROID_API ResourceCache: public Singleton<ResourceCache> {
ResourceCache();
~ResourceCache();
friend class Singleton<ResourceCache>;
public:
/**
* When using these two methods, make sure to only invoke the *Locked()
* variants of increment/decrementRefcount(), recyle() and destructor()
*/
void lock();
void unlock();
/**
* The cache stores a copy of the provided resource or refs an existing resource
* if the bitmap has previously been inserted and returns the cached copy.
*/
const SkBitmap* insert(const SkBitmap* resource);
void incrementRefcount(const SkPath* resource);
void incrementRefcount(const Res_png_9patch* resource);
void decrementRefcount(const SkBitmap* resource);
void decrementRefcount(const SkPath* resource);
void decrementRefcount(const Res_png_9patch* resource);
void decrementRefcountLocked(const SkBitmap* resource);
void decrementRefcountLocked(const SkPath* resource);
void decrementRefcountLocked(const Res_png_9patch* resource);
void destructor(SkPath* resource);
void destructor(Res_png_9patch* resource);
void destructorLocked(SkPath* resource);
void destructorLocked(Res_png_9patch* resource);
private:
void deleteResourceReferenceLocked(const void* resource, ResourceReference* ref);
void incrementRefcount(void* resource, ResourceType resourceType);
void incrementRefcountLocked(void* resource, ResourceType resourceType);
void decrementRefcount(void* resource);
void decrementRefcountLocked(void* resource);
void logCache();
/**
* Used to increment, decrement, and destroy. Incrementing is generally accessed on the UI
* thread, but destroying resources may be called from the GC thread, the finalizer thread,
* or a reference queue finalization thread.
*/
mutable Mutex mLock;
KeyedVector<const void*, ResourceReference*>* mCache;
KeyedVector<BitmapKey, SkBitmap*> mBitmapCache;
};
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_RESOURCE_CACHE_H
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