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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// 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/macros.h"
#include "base/memory/singleton.h"
#include "base/synchronization/lock.h"
#include "gpu/gpu_export.h"
#include "gpu/ipc/common/gpu_surface_lookup.h"
#include "gpu/ipc/common/surface_handle.h"
#include "ui/gfx/native_widget_types.h"
namespace gpu {
// This class is used on Android and Mac, 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
// ANativeWindow, using GpuSurfaceLookup (implemented by
// ChildProcessSurfaceManager).
// On Mac, the handle just passes through the GPU process, and is sent back via
// GpuCommandBufferMsg_SwapBuffersCompleted to reference the surface.
// This class is thread safe.
class GPU_EXPORT GpuSurfaceTracker : public gpu::GpuSurfaceLookup {
public:
// GpuSurfaceLookup implementation:
// Returns the native widget associated with a given surface_handle.
// On Android, this adds a reference on the ANativeWindow.
gfx::AcceleratedWidget AcquireNativeWidget(
gpu::SurfaceHandle surface_handle) override;
#if defined(OS_ANDROID)
void RegisterViewSurface(int surface_id, jobject j_surface);
void UnregisterViewSurface(int surface_id);
gl::ScopedJavaSurface AcquireJavaSurface(int surface_id) override;
#endif
// Gets the global instance of the surface tracker.
static GpuSurfaceTracker* Get() { return GetInstance(); }
// Adds a surface for a native widget. Returns the surface ID.
int AddSurfaceForNativeWidget(gfx::AcceleratedWidget widget);
// 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:
typedef std::map<gpu::SurfaceHandle, gfx::AcceleratedWidget> SurfaceMap;
friend struct base::DefaultSingletonTraits<GpuSurfaceTracker>;
GpuSurfaceTracker();
~GpuSurfaceTracker() override;
mutable base::Lock surface_map_lock_;
SurfaceMap surface_map_;
int next_surface_handle_;
#if defined(OS_ANDROID)
base::Lock surface_view_map_lock_;
typedef std::map<gpu::SurfaceHandle, gl::ScopedJavaSurface> SurfaceViewMap;
SurfaceViewMap surface_view_map_;
#endif
DISALLOW_COPY_AND_ASSIGN(GpuSurfaceTracker);
};
} // namespace ui
#endif // GPU_IPC_COMMON_GPU_SURFACE_TRACKER_H_
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