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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWebEngine module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef DISPLAY_SKIA_OUTPUT_DEVICE_H
#define DISPLAY_SKIA_OUTPUT_DEVICE_H
#include "compositor_resource_fence.h"
#include "compositor.h"
#include "base/threading/thread_task_runner_handle.h"
#include "components/viz/service/display_embedder/skia_output_device.h"
#include "gpu/command_buffer/service/shared_context_state.h"
#include <QMutex>
namespace QtWebEngineCore {
class DisplaySkiaOutputDevice final : public viz::SkiaOutputDevice, public Compositor
{
public:
DisplaySkiaOutputDevice(scoped_refptr<gpu::SharedContextState> contextState,
gpu::MemoryTracker *memoryTracker,
DidSwapBufferCompleteCallback didSwapBufferCompleteCallback);
~DisplaySkiaOutputDevice() override;
// Overridden from SkiaOutputDevice.
void SetFrameSinkId(const viz::FrameSinkId &frame_sink_id) override;
bool Reshape(const gfx::Size& size,
float devicePixelRatio,
const gfx::ColorSpace& colorSpace,
gfx::BufferFormat format,
gfx::OverlayTransform transform) override;
void SwapBuffers(BufferPresentedCallback feedback,
viz::OutputSurfaceFrame frame) override;
void EnsureBackbuffer() override;
void DiscardBackbuffer() override;
SkSurface *BeginPaint(std::vector<GrBackendSemaphore> *semaphores) override;
void EndPaint() override;
// Overridden from Compositor.
void swapFrame() override;
void waitForTexture() override;
int textureId() override;
QSize size() override;
bool hasAlphaChannel() override;
float devicePixelRatio() override;
private:
struct Shape
{
gfx::Size sizeInPixels;
float devicePixelRatio;
gfx::ColorSpace colorSpace;
gfx::BufferFormat format;
bool operator==(const Shape &that) const
{
return (sizeInPixels == that.sizeInPixels &&
devicePixelRatio == that.devicePixelRatio &&
colorSpace == that.colorSpace &&
format == that.format);
}
bool operator!=(const Shape &that) const { return !(*this == that); }
};
class Buffer;
void SwapBuffersFinished();
mutable QMutex m_mutex;
scoped_refptr<gpu::SharedContextState> m_contextState;
Shape m_shape;
std::unique_ptr<Buffer> m_frontBuffer;
std::unique_ptr<Buffer> m_middleBuffer;
std::unique_ptr<Buffer> m_backBuffer;
viz::OutputSurfaceFrame m_frame;
bool m_readyToUpdate = false;
scoped_refptr<base::SingleThreadTaskRunner> m_taskRunner;
};
} // namespace QtWebEngineCore
#endif // !DISPLAY_SKIA_OUTPUT_DEVICE_H
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