shader_function_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_SHADER_FUNCTION_MTL_H_
#define FLUTTER_IMPELLER_RENDERER_BACKEND_METAL_SHADER_FUNCTION_MTL_H_
 
#include <Metal/Metal.h>
 
#include "flutter/fml/macros.h"
#include "impeller/base/backend_cast.h"
#include "impeller/renderer/shader_function.h"
 
namespace impeller {
 
class ShaderFunctionMTL final
    : public ShaderFunction,
      public BackendCast<ShaderFunctionMTL, ShaderFunction> {
 public:
  // |ShaderFunction|
  ~ShaderFunctionMTL() override;
 
  id<MTLFunction> GetMTLFunction() const;
 
  using CompileCallback = std::function<void(id<MTLFunction>)>;
 
  void GetMTLFunctionSpecialized(const std::vector<Scalar>& constants,
                                 const CompileCallback& callback) const;
 
 private:
  friend class ShaderLibraryMTL;
 
  id<MTLFunction> function_ = nullptr;
  id<MTLLibrary> library_ = nullptr;
 
  ShaderFunctionMTL(UniqueID parent_library_id,
                    id<MTLFunction> function,
                    id<MTLLibrary> library,
                    std::string name,
                    ShaderStage stage);
 
  ShaderFunctionMTL(const ShaderFunctionMTL&) = delete;
 
  ShaderFunctionMTL& operator=(const ShaderFunctionMTL&) = delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_RENDERER_BACKEND_METAL_SHADER_FUNCTION_MTL_H_