ui/gfx/geometry/point_f.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_GFX_GEOMETRY_POINT_F_H_
   6 #define UI_GFX_GEOMETRY_POINT_F_H_
   7
   8 #include <iosfwd>
   9 #include <string>
  10
  11 #include "ui/gfx/geometry/point_base.h"
  12 #include "ui/gfx/geometry/vector2d_f.h"
  13 #include "ui/gfx/gfx_export.h"
  14
  15 namespace gfx {
  16
  17 // A floating version of gfx::Point.
  18 class GFX_EXPORT PointF : public PointBase<PointF, float, Vector2dF> {
  19  public:
  20   PointF() : PointBase<PointF, float, Vector2dF>(0, 0) {}
  21   PointF(float x, float y) : PointBase<PointF, float, Vector2dF>(x, y) {}
  22   ~PointF() {}
  23
  24   void Scale(float scale) {
  25     Scale(scale, scale);
  26   }
  27
  28   void Scale(float x_scale, float y_scale) {
  29     SetPoint(x() * x_scale, y() * y_scale);
  30   }
  31
  32   // Returns a string representation of point.
  33   std::string ToString() const;
  34 };
  35
  36 inline bool operator==(const PointF& lhs, const PointF& rhs) {
  37   return lhs.x() == rhs.x() && lhs.y() == rhs.y();
  38 }
  39
  40 inline bool operator!=(const PointF& lhs, const PointF& rhs) {
  41   return !(lhs == rhs);
  42 }
  43
  44 inline PointF operator+(const PointF& lhs, const Vector2dF& rhs) {
  45   PointF result(lhs);
  46   result += rhs;
  47   return result;
  48 }
  49
  50 inline PointF operator-(const PointF& lhs, const Vector2dF& rhs) {
  51   PointF result(lhs);
  52   result -= rhs;
  53   return result;
  54 }
  55
  56 inline Vector2dF operator-(const PointF& lhs, const PointF& rhs) {
  57   return Vector2dF(lhs.x() - rhs.x(), lhs.y() - rhs.y());
  58 }
  59
  60 inline PointF PointAtOffsetFromOrigin(const Vector2dF& offset_from_origin) {
  61   return PointF(offset_from_origin.x(), offset_from_origin.y());
  62 }
  63
  64 GFX_EXPORT PointF ScalePoint(const PointF& p, float x_scale, float y_scale);
  65
  66 inline PointF ScalePoint(const PointF& p, float scale) {
  67   return ScalePoint(p, scale, scale);
  68 }
  69
  70 #if !defined(COMPILER_MSVC)
  71 extern template class PointBase<PointF, float, Vector2dF>;
  72 #endif
  73
  74 // This is declared here for use in gtest-based unit tests but is defined in
  75 // the gfx_test_support target. Depend on that to use this in your unit test.
  76 // This should not be used in production code - call ToString() instead.
  77 void PrintTo(const PointF& point, ::std::ostream* os);
  78
  79 }  // namespace gfx
  80
  81 #endif  // UI_GFX_GEOMETRY_POINT_F_H_