gfx/2d/Triangle.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef MOZILLA_GFX_TRIANGLE_H
   8 #define MOZILLA_GFX_TRIANGLE_H
   9
  10 #include <algorithm>
  11 #include <utility>
  12
  13 #include "Point.h"
  14 #include "Rect.h"
  15
  16 namespace mozilla {
  17 namespace gfx {
  18
  19 /**
  20  * A simple triangle data structure.
  21  */
  22 template <class Units, class F = Float>
  23 struct TriangleTyped {
  24   PointTyped<Units, F> p1, p2, p3;
  25
  26   TriangleTyped() : p1(), p2(), p3() {}
  27
  28   TriangleTyped(PointTyped<Units, F> aP1, PointTyped<Units, F> aP2,
  29                 PointTyped<Units, F> aP3)
  30       : p1(aP1), p2(aP2), p3(aP3) {}
  31
  32   RectTyped<Units, F> BoundingBox() const {
  33     F minX = std::min(std::min(p1.x, p2.x), p3.x);
  34     F maxX = std::max(std::max(p1.x, p2.x), p3.x);
  35
  36     F minY = std::min(std::min(p1.y, p2.y), p3.y);
  37     F maxY = std::max(std::max(p1.y, p2.y), p3.y);
  38
  39     return RectTyped<Units, F>(minX, minY, maxX - minX, maxY - minY);
  40   }
  41 };
  42
  43 typedef TriangleTyped<UnknownUnits, Float> Triangle;
  44
  45 template <class Units, class F = Float>
  46 struct TexturedTriangleTyped : public TriangleTyped<Units, F> {
  47   explicit TexturedTriangleTyped(const TriangleTyped<Units, F>& aTriangle)
  48       : TriangleTyped<Units, F>(aTriangle) {}
  49
  50   explicit TexturedTriangleTyped(TriangleTyped<Units, F>&& aTriangle)
  51       : TriangleTyped<Units, F>(std::move(aTriangle)) {}
  52
  53   TriangleTyped<Units, F> textureCoords;
  54 };
  55
  56 typedef TexturedTriangleTyped<UnknownUnits, Float> TexturedTriangle;
  57
  58 }  // namespace gfx
  59 }  // namespace mozilla
  60
  61 #endif /* MOZILLA_GFX_TRIANGLE_H */