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// Copyright 2012 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_IPC_COMMON_GPU_SURFACE_TRACKER_H_
#define GPU_IPC_COMMON_GPU_SURFACE_TRACKER_H_
#include <stddef.h>
#include <map>
#include "base/memory/singleton.h"
#include "base/synchronization/lock.h"
#include "gpu/ipc/common/gpu_ipc_common_export.h"
#include "gpu/ipc/common/gpu_surface_lookup.h"
#include "gpu/ipc/common/surface_handle.h"
#include "ui/gl/android/scoped_java_surface.h"
#include "ui/gl/android/scoped_java_surface_control.h"
namespace gpu {
// This class is used on Android, and is responsible for tracking native
// window surfaces exposed to the GPU process. Every surface gets registered to
// this class, and gets a handle. The handle can be passed to
// CommandBufferProxyImpl::Create or to
// GpuMemoryBufferManager::CreateGpuMemoryBuffer.
// On Android, the handle is used in the GPU process to get a reference to the
// ScopedJavaSurface, using GpuSurfaceLookup (implemented by
// ChildProcessSurfaceManager).
// This class is thread safe.
class GPU_IPC_COMMON_EXPORT GpuSurfaceTracker : public gpu::GpuSurfaceLookup {
public:
SurfaceRecord AcquireJavaSurface(gpu::SurfaceHandle surface_handle) override;
// Gets the global instance of the surface tracker.
static GpuSurfaceTracker* Get() { return GetInstance(); }
GpuSurfaceTracker(const GpuSurfaceTracker&) = delete;
GpuSurfaceTracker& operator=(const GpuSurfaceTracker&) = delete;
// Adds a surface for a native widget. Returns the surface ID.
int AddSurfaceForNativeWidget(SurfaceRecord record);
// Return true if the surface handle is registered with the tracker.
bool IsValidSurfaceHandle(gpu::SurfaceHandle surface_handle) const;
// Removes a given existing surface.
void RemoveSurface(gpu::SurfaceHandle surface_handle);
// Returns the number of surfaces currently registered with the tracker.
std::size_t GetSurfaceCount();
// Gets the global instance of the surface tracker. Identical to Get(), but
// named that way for the implementation of Singleton.
static GpuSurfaceTracker* GetInstance();
private:
using SurfaceMap = std::map<gpu::SurfaceHandle, SurfaceRecord>;
friend struct base::DefaultSingletonTraits<GpuSurfaceTracker>;
GpuSurfaceTracker();
~GpuSurfaceTracker() override;
mutable base::Lock surface_map_lock_;
SurfaceMap surface_map_;
int next_surface_handle_;
};
} // namespace ui
#endif // GPU_IPC_COMMON_GPU_SURFACE_TRACKER_H_
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