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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GPU_COMMAND_BUFFER_CLIENT_READBACK_BUFFER_SHADOW_TRACKER_H_
#define GPU_COMMAND_BUFFER_CLIENT_READBACK_BUFFER_SHADOW_TRACKER_H_
#include <GLES2/gl2.h>
#include "base/containers/flat_map.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
namespace gpu {
class MappedMemoryManager;
namespace gles2 {
class GLES2CmdHelper;
class ReadbackBufferShadowTracker {
public:
class Buffer final {
public:
explicit Buffer(GLuint buffer_id,
MappedMemoryManager* mapped_memory,
GLES2CmdHelper* helper);
Buffer(const Buffer&) = delete;
Buffer& operator=(const Buffer&) = delete;
~Buffer();
uint32_t Alloc(int32_t* shm_id,
uint32_t* shm_offset,
bool* already_allocated);
void Free();
void FreePendingToken(int32_t token);
void* MapReadbackShm(uint32_t offset, uint32_t map_size);
bool UnmapReadbackShm();
void UpdateSerialTo(uint64_t serial);
GLuint id() const { return buffer_id_; }
base::WeakPtr<Buffer> AsWeakPtr() { return weak_ptr_factory_.GetWeakPtr(); }
private:
friend class ReadbackBufferShadowTracker;
GLuint buffer_id_ = 0;
raw_ptr<MappedMemoryManager> mapped_memory_;
raw_ptr<GLES2CmdHelper> helper_;
int32_t shm_id_ = 0;
uint32_t shm_offset_ = 0;
raw_ptr<void> readback_shm_address_ = nullptr;
uint64_t serial_of_last_write_ = 1; // will be updated right after creation
uint64_t serial_of_readback_data_ = 0;
uint32_t size_ = 0;
bool is_mapped_ = false;
base::WeakPtrFactory<Buffer> weak_ptr_factory_{this};
};
ReadbackBufferShadowTracker(MappedMemoryManager* mapped_memory,
GLES2CmdHelper* helper);
ReadbackBufferShadowTracker(const ReadbackBufferShadowTracker&) = delete;
ReadbackBufferShadowTracker& operator=(const ReadbackBufferShadowTracker&) =
delete;
~ReadbackBufferShadowTracker();
Buffer* GetOrCreateBuffer(GLuint id, GLuint size);
Buffer* GetBuffer(GLuint id) {
auto it = buffers_.find(id);
return it != buffers_.end() ? it->second.get() : nullptr;
}
// Un-tracks a buffer. Should only be called *after* the glDeleteBuffers
// command has been issued.
void RemoveBuffer(GLuint id) { buffers_.erase(id); }
void OnBufferWrite(GLuint id);
using BufferList = std::vector<base::WeakPtr<Buffer>>;
BufferList TakeUnfencedBufferList();
const BufferList& GetUnfencedBufferList() const {
return buffers_written_but_not_fenced_;
}
uint64_t buffer_shadow_serial() const { return buffer_shadow_serial_; }
void IncrementSerial() { buffer_shadow_serial_++; }
private:
using BufferMap = base::flat_map<GLuint, std::unique_ptr<Buffer>>;
BufferMap buffers_;
BufferList buffers_written_but_not_fenced_;
uint64_t buffer_shadow_serial_ = 1;
raw_ptr<MappedMemoryManager> mapped_memory_;
raw_ptr<GLES2CmdHelper> helper_;
};
} // namespace gles2
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_CLIENT_READBACK_BUFFER_SHADOW_TRACKER_H_
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