geometry_type.hpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef GEOMETRY_TYPE_HPP
#define GEOMETRY_TYPE_HPP
 
#if defined(__APPLE__)
  /* Mac OS X already has both Rect and Point declared */
# define Rect OTTD_Rect
# define Point OTTD_Point
#endif /* __APPLE__ */
 
 
struct Point {
  int x;
  int y;
 
  constexpr Point() : x(0), y(0) {}
  constexpr Point(int x, int y) : x(x), y(y) {}
};
 
struct Dimension {
  uint width;
  uint height;
 
  constexpr Dimension() : width(0), height(0) {}
  constexpr Dimension(uint w, uint h) : width(w), height(h) {}
 
  bool operator< (const Dimension &other) const
  {
    int x = (*this).width - other.width;
    if (x != 0) return x < 0;
    return (*this).height < other.height;
  }
 
  bool operator== (const Dimension &other) const
  {
    return (*this).width == other.width && (*this).height == other.height;
  }
};
 
struct RectPadding {
  uint8_t left;
  uint8_t top;
  uint8_t right;
  uint8_t bottom;
 
  static const RectPadding zero;
 
  constexpr uint Horizontal() const { return this->left + this->right; }
 
  constexpr uint Vertical() const { return this->top + this->bottom; }
};
 
inline const RectPadding RectPadding::zero{};
 
struct Rect {
  int left;
  int top;
  int right;
  int bottom;
 
  inline int Width() const { return this->right - this->left + 1; }
 
  inline int Height() const { return this->bottom - this->top + 1; }
 
  [[nodiscard]] inline Rect Shrink(int s) const
  {
    return {this->left + s, this->top + s, this->right - s, this->bottom - s};
  }
 
  [[nodiscard]] inline Rect Shrink(int h, int v) const
  {
    return {this->left + h, this->top + v, this->right - h, this->bottom - v};
  }
 
  [[nodiscard]] inline Rect Shrink(int left, int top, int right, int bottom) const
  {
    return {this->left + left, this->top + top, this->right - right, this->bottom - bottom};
  }
 
  [[nodiscard]] inline Rect Shrink(const RectPadding &other) const
  {
    return {this->left + other.left, this->top + other.top, this->right - other.right, this->bottom - other.bottom};
  }
 
  [[nodiscard]] inline Rect Shrink(const RectPadding &horz, const RectPadding &vert) const
  {
    return {this->left + horz.left, this->top + vert.top, this->right - horz.right, this->bottom - vert.bottom};
  }
 
  [[nodiscard]] inline Rect Expand(int s) const
  {
    return this->Shrink(-s);
  }
 
  [[nodiscard]] inline Rect Expand(const RectPadding &other) const
  {
    return {this->left - other.left, this->top - other.top, this->right + other.right, this->bottom + other.bottom};
  }
 
  [[nodiscard]] inline Rect Translate(int x, int y) const
  {
    return {this->left + x, this->top + y, this->right + x, this->bottom + y};
  }
 
  [[nodiscard]] inline Rect WithWidth(int width, bool end) const
  {
    return end
      ? Rect {this->right - width + 1, this->top, this->right,            this->bottom}
      : Rect {this->left,              this->top, this->left + width - 1, this->bottom};
  }
 
  [[nodiscard]] inline Rect Indent(int indent, bool end) const
  {
    return end
      ? Rect {this->left,          this->top, this->right - indent, this->bottom}
      : Rect {this->left + indent, this->top, this->right,          this->bottom};
  }
 
  [[nodiscard]] inline Rect WithHeight(int height, bool end = false) const
  {
    return end
      ? Rect {this->left, this->bottom - height + 1, this->right, this->bottom}
      : Rect {this->left, this->top,                 this->right, this->top + height - 1};
  }
 
  inline bool Contains(const Point &pt) const
  {
    /* This is a local version of IsInsideMM, to avoid including math_func everywhere. */
    return (uint)(pt.x - this->left) < (uint)(this->right - this->left) && (uint)(pt.y - this->top) < (uint)(this->bottom - this->top);
  }
};
 
struct PointDimension {
  int x;
  int y;
  int width;
  int height;
};
 
#endif /* GEOMETRY_TYPE_HPP */