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// Copyright 2025 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_SERVICE_SHARED_IMAGE_SHARED_IMAGE_COPY_MANAGER_H_
#define GPU_COMMAND_BUFFER_SERVICE_SHARED_IMAGE_SHARED_IMAGE_COPY_MANAGER_H_
#include <memory>
#include <vector>
#include "base/memory/ref_counted.h"
#include "gpu/command_buffer/service/shared_image/shared_image_backing.h"
#include "gpu/gpu_gles2_export.h"
namespace gpu {
class SharedImageCopyStrategy;
// Manages copy strategies and performs copies between shared image backings.
// SharedImageBacking can be created and destroyed in different threads. Since
// CompoundImageBacking has a ref to SharedImageCopyManager, it is
// made RefCountedThreadSafe to allow it to be created and destroyed on
// different threads. The |strategies_| does not need locks because they are
// assumed to be added during initialization and not modified afterward.
class GPU_GLES2_EXPORT SharedImageCopyManager
: public base::RefCountedThreadSafe<SharedImageCopyManager> {
public:
SharedImageCopyManager();
// Adds a strategy to the list of available copy strategies. The manager
// takes ownership of the strategy. Strategies should be added in order of
// preference, from most to least optimal.
void AddStrategy(std::unique_ptr<SharedImageCopyStrategy> strategy);
// Performs a copy from the source to the destination backing by iterating
// through the registered strategies and using the first one that supports the
// given backings. Returns true on success, false otherwise.
bool CopyImage(SharedImageBacking* src_backing,
SharedImageBacking* dst_backing);
private:
friend class base::RefCountedThreadSafe<SharedImageCopyManager>;
~SharedImageCopyManager();
std::vector<std::unique_ptr<SharedImageCopyStrategy>> strategies_;
};
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_SERVICE_SHARED_IMAGE_SHARED_IMAGE_COPY_MANAGER_H_
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