allocator_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_ALLOCATOR_MTL_H_
#define FLUTTER_IMPELLER_RENDERER_BACKEND_METAL_ALLOCATOR_MTL_H_
 
#include <Metal/Metal.h>
 
#include "impeller/core/allocator.h"
 
namespace impeller {
 
class AllocatorMTL final : public Allocator {
 public:
  AllocatorMTL();
 
  // |Allocator|
  ~AllocatorMTL() override;
 
 private:
  friend class ContextMTL;
 
  id<MTLDevice> device_;
  std::string allocator_label_;
  bool supports_memoryless_targets_ = false;
  bool supports_uma_ = false;
  bool is_valid_ = false;
  ISize max_texture_supported_;
 
  AllocatorMTL(id<MTLDevice> device, std::string label);
 
  // |Allocator|
  bool IsValid() const;
 
  // |Allocator|
  std::shared_ptr<DeviceBuffer> OnCreateBuffer(
      const DeviceBufferDescriptor& desc) override;
 
  // |Allocator|
  std::shared_ptr<Texture> OnCreateTexture(
      const TextureDescriptor& desc) override;
 
  // |Allocator|
  uint16_t MinimumBytesPerRow(PixelFormat format) const override;
 
  // |Allocator|
  ISize GetMaxTextureSizeSupported() const override;
 
  AllocatorMTL(const AllocatorMTL&) = delete;
 
  AllocatorMTL& operator=(const AllocatorMTL&) = delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_RENDERER_BACKEND_METAL_ALLOCATOR_MTL_H_