// Copyright 2013 The Flutter 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 FLUTTER_SHELL_GPU_GPU_SURFACE_NOOP_H_

#define FLUTTER_SHELL_GPU_GPU_SURFACE_NOOP_H_

#include <Metal/Metal.h>

#include "flutter/flow/surface.h"

namespace flutter {

/// @brief A rendering surface that accepts rendering intent but does not render

/// anything.

///

/// This is useful for running on platforms that need an engine instance and

/// don't have the required drivers.

class GPUSurfaceNoop : public Surface {

public:

explicit GPUSurfaceNoop();

// |Surface|

~GPUSurfaceNoop();

// |Surface|

bool IsValid() override;

// |Surface|

Surface::SurfaceData GetSurfaceData() const override;

private:

// |Surface|

std::unique_ptr<SurfaceFrame> AcquireFrame(

const DlISize& frame_size) override;

std::unique_ptr<SurfaceFrame> AcquireFrameFromCAMetalLayer(

const DlISize& frame_size);

std::unique_ptr<SurfaceFrame> AcquireFrameFromMTLTexture(

const DlISize& frame_size);

// |Surface|

DlMatrix GetRootTransformation() const override;

// |Surface|

GrDirectContext* GetContext() override;

// |Surface|

std::unique_ptr<GLContextResult> MakeRenderContextCurrent() override;

// |Surface|

bool AllowsDrawingWhenGpuDisabled() const override;

// |Surface|

bool EnableRasterCache() const override;

// |Surface|

std::shared_ptr<impeller::AiksContext> GetAiksContext() const override;

GPUSurfaceNoop(const GPUSurfaceNoop&) = delete;

GPUSurfaceNoop& operator=(const GPUSurfaceNoop&) = delete;

};

} // namespace flutter

#endif // FLUTTER_SHELL_GPU_GPU_SURFACE_NOOP_H_