sampler_library_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_SAMPLER_LIBRARY_MTL_H_
#define FLUTTER_IMPELLER_RENDERER_BACKEND_METAL_SAMPLER_LIBRARY_MTL_H_
 
#include <Metal/Metal.h>
 
#include <memory>
 
#include "impeller/base/backend_cast.h"
#include "impeller/base/comparable.h"
#include "impeller/core/sampler_descriptor.h"
#include "impeller/renderer/sampler_library.h"
 
namespace impeller {
 
class SamplerLibraryMTL final
    : public SamplerLibrary,
      public BackendCast<SamplerLibraryMTL, SamplerLibrary> {
 public:
  // |SamplerLibrary|
  ~SamplerLibraryMTL() override;
 
 private:
  friend class ContextMTL;
 
  id<MTLDevice> device_ = nullptr;
  std::vector<std::pair<uint64_t, std::shared_ptr<const Sampler>>> samplers_;
 
  explicit SamplerLibraryMTL(id<MTLDevice> device);
 
  // |SamplerLibrary|
  raw_ptr<const Sampler> GetSampler(
      const SamplerDescriptor& descriptor) override;
 
  SamplerLibraryMTL(const SamplerLibraryMTL&) = delete;
 
  SamplerLibraryMTL& operator=(const SamplerLibraryMTL&) = delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_RENDERER_BACKEND_METAL_SAMPLER_LIBRARY_MTL_H_