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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 UI_GL_GL_FENCE_H_
#define UI_GL_GL_FENCE_H_
#include <memory>
#include "base/macros.h"
#include "ui/gfx/gpu_fence.h"
#include "ui/gl/gl_export.h"
namespace gl {
class GL_EXPORT GLFence {
public:
GLFence();
virtual ~GLFence();
static bool IsSupported();
static std::unique_ptr<GLFence> Create();
// GpuFenceHandle integration.
static bool IsGpuFenceSupported();
// Consumes the GpuFenceHandle to create a paired local GL fence.
static std::unique_ptr<GLFence> CreateFromGpuFence(
const gfx::GpuFence& gpu_fence);
// Create a new GLFence that can be used with GetGpuFence.
static std::unique_ptr<GLFence> CreateForGpuFence();
virtual bool HasCompleted() = 0;
virtual void ClientWait() = 0;
// Will block the server if supported, but might fall back to blocking the
// client.
virtual void ServerWait() = 0;
// Returns true if re-setting state is supported.
virtual bool ResetSupported();
// Resets the fence to the original state.
virtual void ResetState();
// Loses the reference to the fence. Useful if the context is lost.
virtual void Invalidate();
// Returns a GpuFence. Only valid on a GLFence created by
// CreateForGpuFence.
virtual std::unique_ptr<gfx::GpuFence> GetGpuFence();
private:
DISALLOW_COPY_AND_ASSIGN(GLFence);
};
} // namespace gl
#endif // UI_GL_GL_FENCE_H_
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