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gradient.hh
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1 //------------------------------------------------------------------------------
2 // This file is part of the OpenStructure project <www.openstructure.org>
3 //
4 // Copyright (C) 2008-2011 by the OpenStructure authors
5 //
6 // This library is free software; you can redistribute it and/or modify it under
7 // the terms of the GNU Lesser General Public License as published by the Free
8 // Software Foundation; either version 3.0 of the License, or (at your option)
9 // any later version.
10 // This library is distributed in the hope that it will be useful, but WITHOUT
11 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
12 // FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
13 // details.
14 //
15 // You should have received a copy of the GNU Lesser General Public License
16 // along with this library; if not, write to the Free Software Foundation, Inc.,
17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 //------------------------------------------------------------------------------
19 #ifndef OST_GFX_GRADIENT_HH
20 #define OST_GFX_GRADIENT_HH
21 
22 /*
23  Author: Marco Biasini
24  */
25 
26 #include <vector>
27 
28 #include "color.hh"
29 
30 #include <ost/info/info.hh>
31 #include <ost/info/info_fw.hh>
32 
33 
34 namespace ost { namespace gfx {
35 
44 public:
45  struct Stop {
46  Stop(): t(0.0) {}
47 
48  Stop(float tt, const Color& c): t(tt), color(c) {}
49  float t;
51 
53  return color;
54  }
55 
56  float GetRel(){
57  return t;
58  }
59 
60  bool operator==(const Stop& ref) const
61  {
62  return t==ref.t && color==ref.color;
63  }
64 
65  };
66 
67  typedef std::vector<Stop> StopList;
68 
69 public:
74  Gradient();
75 
77  Gradient(const String& name);
78 
80  Color GetColorAt(float t) const;
85  void SetColorAt(float t, const Color& color);
86 
88  void GradientToInfo(info::InfoGroup& group) const;
89 
91  StopList GetStops() const;
92 
94  static gfx::Gradient GradientFromInfo(const info::InfoGroup& group);
95 private:
96  std::vector<Stop> stops_;
97 
98 };
99 
100 
104 }}
105 
106 #endif