sampler.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_CORE_SAMPLER_H_
#define FLUTTER_IMPELLER_CORE_SAMPLER_H_
 
#include <unordered_map>
 
#include "impeller/base/comparable.h"
#include "impeller/core/sampler_descriptor.h"
 
namespace impeller {
 
class Sampler {
 public:
  virtual ~Sampler();
 
  virtual bool IsValid() const = 0;
 
  const SamplerDescriptor& GetDescriptor() const;
 
 protected:
  SamplerDescriptor desc_;
 
  explicit Sampler(SamplerDescriptor desc);
 
 private:
  Sampler(const Sampler&) = delete;
 
  Sampler& operator=(const Sampler&) = delete;
};
 
using SamplerMap = std::unordered_map<SamplerDescriptor,
                                      std::shared_ptr<const Sampler>,
                                      ComparableHash<SamplerDescriptor>,
                                      ComparableEqual<SamplerDescriptor>>;
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_CORE_SAMPLER_H_