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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_PATCH_CACHE_H
#define ANDROID_HWUI_PATCH_CACHE_H
#include <GLES2/gl2.h>
#include <utils/LruCache.h>
#include <androidfw/ResourceTypes.h>
#include "AssetAtlas.h"
#include "Debug.h"
#include "utils/Pair.h"
namespace android {
namespace uirenderer {
class Patch;
///////////////////////////////////////////////////////////////////////////////
// Defines
///////////////////////////////////////////////////////////////////////////////
// Debug
#if DEBUG_PATCHES
#define PATCH_LOGD(...) ALOGD(__VA_ARGS__)
#else
#define PATCH_LOGD(...)
#endif
///////////////////////////////////////////////////////////////////////////////
// Cache
///////////////////////////////////////////////////////////////////////////////
class Caches;
class PatchCache {
public:
PatchCache(RenderState& renderState);
~PatchCache();
void init();
const Patch* get(const AssetAtlas::Entry* entry,
const uint32_t bitmapWidth, const uint32_t bitmapHeight,
const float pixelWidth, const float pixelHeight, const Res_png_9patch* patch);
void clear();
uint32_t getSize() const {
return mSize;
}
uint32_t getMaxSize() const {
return mMaxSize;
}
GLuint getMeshBuffer() const {
return mMeshBuffer;
}
uint32_t getGenerationId() const {
return mGenerationId;
}
/**
* Removes the entries associated with the specified 9-patch. This is meant
* to be called from threads that are not the EGL context thread (GC thread
* on the VM side for instance.)
*/
void removeDeferred(Res_png_9patch* patch);
/**
* Process deferred removals.
*/
void clearGarbage();
private:
struct PatchDescription {
PatchDescription(): mPatch(nullptr), mBitmapWidth(0), mBitmapHeight(0),
mPixelWidth(0), mPixelHeight(0) {
}
PatchDescription(const uint32_t bitmapWidth, const uint32_t bitmapHeight,
const float pixelWidth, const float pixelHeight, const Res_png_9patch* patch):
mPatch(patch), mBitmapWidth(bitmapWidth), mBitmapHeight(bitmapHeight),
mPixelWidth(pixelWidth), mPixelHeight(pixelHeight) {
}
hash_t hash() const;
const Res_png_9patch* getPatch() const { return mPatch; }
static int compare(const PatchDescription& lhs, const PatchDescription& rhs);
bool operator==(const PatchDescription& other) const {
return compare(*this, other) == 0;
}
bool operator!=(const PatchDescription& other) const {
return compare(*this, other) != 0;
}
friend inline int strictly_order_type(const PatchDescription& lhs,
const PatchDescription& rhs) {
return PatchDescription::compare(lhs, rhs) < 0;
}
friend inline int compare_type(const PatchDescription& lhs,
const PatchDescription& rhs) {
return PatchDescription::compare(lhs, rhs);
}
friend inline hash_t hash_type(const PatchDescription& entry) {
return entry.hash();
}
private:
const Res_png_9patch* mPatch;
uint32_t mBitmapWidth;
uint32_t mBitmapHeight;
float mPixelWidth;
float mPixelHeight;
}; // struct PatchDescription
/**
* A buffer block represents an empty range in the mesh buffer
* that can be used to store vertices.
*
* The patch cache maintains a linked-list of buffer blocks
* to track available regions of memory in the VBO.
*/
struct BufferBlock {
BufferBlock(uint32_t offset, uint32_t size): offset(offset), size(size), next(nullptr) {
}
uint32_t offset;
uint32_t size;
BufferBlock* next;
}; // struct BufferBlock
typedef Pair<const PatchDescription*, Patch*> patch_pair_t;
void clearCache();
void createVertexBuffer();
void setupMesh(Patch* newMesh);
void remove(Vector<patch_pair_t>& patchesToRemove, Res_png_9patch* patch);
#if DEBUG_PATCHES
void dumpFreeBlocks(const char* prefix);
#endif
RenderState& mRenderState;
uint32_t mMaxSize;
uint32_t mSize;
LruCache<PatchDescription, Patch*> mCache;
GLuint mMeshBuffer;
// First available free block inside the mesh buffer
BufferBlock* mFreeBlocks;
uint32_t mGenerationId;
// Garbage tracking, required to handle GC events on the VM side
Vector<Res_png_9patch*> mGarbage;
mutable Mutex mLock;
}; // class PatchCache
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_PATCH_CACHE_H
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