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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_EXO_FRAME_SINK_RESOURCE_MANAGER_H_
#define COMPONENTS_EXO_FRAME_SINK_RESOURCE_MANAGER_H_
#include "base/containers/flat_map.h"
#include "components/viz/common/resources/release_callback.h"
#include "components/viz/common/resources/resource_id.h"
#include "components/viz/common/resources/returned_resource.h"
namespace exo {
// This class manages the resource IDs and active resource callbacks suitable
// for implementing a frame sink.
class FrameSinkResourceManager {
public:
using ReleaseCallback = base::OnceCallback<void(viz::ReturnedResource)>;
FrameSinkResourceManager();
FrameSinkResourceManager(const FrameSinkResourceManager&) = delete;
FrameSinkResourceManager& operator=(const FrameSinkResourceManager&) = delete;
~FrameSinkResourceManager();
bool HasReleaseCallbackForResource(viz::ResourceId id);
void SetResourceReleaseCallback(viz::ResourceId id, ReleaseCallback callback);
viz::ResourceId AllocateResourceId();
bool HasNoCallbacks() const;
void ReclaimResource(viz::ReturnedResource resource);
void ClearAllCallbacks();
private:
// A collection of callbacks used to release resources.
using ResourceReleaseCallbackMap =
base::flat_map<viz::ResourceId, ReleaseCallback>;
ResourceReleaseCallbackMap release_callbacks_;
// The id generator for the buffer.
viz::ResourceIdGenerator id_generator_;
};
} // namespace exo
#endif // COMPONENTS_EXO_FRAME_SINK_RESOURCE_MANAGER_H_
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