rational.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_GEOMETRY_RATIONAL_H_
#define FLUTTER_IMPELLER_GEOMETRY_RATIONAL_H_
 
#include <cstdint>
#include "impeller/geometry/scalar.h"
 
namespace impeller {
 
class Rational {
 public:
  constexpr explicit Rational(int32_t num) : num_(num), den_(1) {}
 
  constexpr Rational(int32_t num, uint32_t den) : num_(num), den_(den) {}
 
  int32_t GetNumerator() const { return num_; }
 
  uint32_t GetDenominator() const { return den_; }
 
  bool operator==(const Rational& that) const;
 
  bool operator!=(const Rational& that) const;
 
  bool operator<(const Rational& that) const;
 
  uint64_t GetHash() const;
 
  explicit operator Scalar() const { return static_cast<float>(num_) / den_; }
 
  Rational Invert() const;
 
 private:
  int32_t num_;
  uint32_t den_;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_GEOMETRY_RATIONAL_H_