device_buffer_mtl.h

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// 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_IMPELLER_RENDERER_BACKEND_METAL_DEVICE_BUFFER_MTL_H_
#define FLUTTER_IMPELLER_RENDERER_BACKEND_METAL_DEVICE_BUFFER_MTL_H_
 
#include <Metal/Metal.h>
 
#include "flutter/fml/macros.h"
#include "impeller/base/backend_cast.h"
#include "impeller/core/device_buffer.h"
 
namespace impeller {
 
class DeviceBufferMTL final : public DeviceBuffer,
                              public BackendCast<DeviceBufferMTL, Buffer> {
 public:
  DeviceBufferMTL();
 
  // |DeviceBuffer|
  ~DeviceBufferMTL() override;
 
  id<MTLBuffer> GetMTLBuffer() const;
 
 private:
  friend class AllocatorMTL;
 
  const id<MTLBuffer> buffer_;
  const MTLStorageMode storage_mode_;
 
  DeviceBufferMTL(DeviceBufferDescriptor desc,
                  id<MTLBuffer> buffer,
                  MTLStorageMode storage_mode);
 
  // |DeviceBuffer|
  uint8_t* OnGetContents() const override;
 
  // |DeviceBuffer|
  std::shared_ptr<Texture> AsTexture(Allocator& allocator,
                                     const TextureDescriptor& descriptor,
                                     uint16_t row_bytes) const override;
 
  // |DeviceBuffer|
  bool OnCopyHostBuffer(const uint8_t* source,
                        Range source_range,
                        size_t offset) override;
 
  // |DeviceBuffer|
  bool SetLabel(const std::string& label) override;
 
  // |DeviceBuffer|
  bool SetLabel(const std::string& label, Range range) override;
 
  DeviceBufferMTL(const DeviceBufferMTL&) = delete;
 
  DeviceBufferMTL& operator=(const DeviceBufferMTL&) = delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_RENDERER_BACKEND_METAL_DEVICE_BUFFER_MTL_H_