1 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield |
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2 | * |
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3 | * This library is open source and may be redistributed and/or modified under |
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4 | * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or |
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5 | * (at your option) any later version. The full license is in LICENSE file |
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6 | * included with this distribution, and on the openscenegraph.org website. |
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7 | * |
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8 | * This library is distributed in the hope that it will be useful, |
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9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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11 | * OpenSceneGraph Public License for more details. |
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12 | */ |
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13 | |
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14 | #ifndef OSG_BUFFERED_VALUE |
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15 | #define OSG_BUFFERED_VALUE 1 |
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16 | |
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17 | #include <osg/DisplaySettings> |
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18 | #include <vector> |
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19 | |
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20 | namespace osg { |
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21 | |
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22 | /** Implements a simple buffered value for values that need to be buffered on |
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23 | * a per graphics context basis. |
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24 | */ |
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25 | template<class T> |
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26 | class buffered_value |
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27 | { |
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28 | public: |
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29 | |
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30 | inline buffered_value(): |
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31 | _array(DisplaySettings::instance()->getMaxNumberOfGraphicsContexts(),0) |
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32 | {} |
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33 | |
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34 | inline buffered_value(unsigned int size): |
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35 | _array(size,0) |
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36 | {} |
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37 | |
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38 | buffered_value& operator = (const buffered_value& rhs) |
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39 | { |
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40 | _array = rhs._array; |
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41 | return *this; |
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42 | } |
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43 | |
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44 | inline void setAllElementsTo(const T& t) { std::fill(_array.begin(),_array.end(),t); } |
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45 | |
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46 | inline void clear() { _array.clear(); } |
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47 | |
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48 | inline bool empty() const { return _array.empty(); } |
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49 | |
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50 | inline unsigned int size() const { return _array.size(); } |
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51 | |
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52 | inline void resize(unsigned int newSize) { _array.resize(newSize,0); } |
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53 | |
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54 | inline T& operator[] (unsigned int pos) |
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55 | { |
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56 | // automatically resize array. |
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57 | if (_array.size()<=pos) |
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58 | _array.resize(pos+1,0); |
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59 | |
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60 | return _array[pos]; |
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61 | } |
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62 | |
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63 | inline T operator[] (unsigned int pos) const |
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64 | { |
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65 | // automatically resize array. |
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66 | if (_array.size()<=pos) |
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67 | _array.resize(pos+1,0); |
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68 | |
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69 | return _array[pos]; |
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70 | } |
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71 | |
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72 | protected: |
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73 | |
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74 | mutable std::vector<T> _array; |
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75 | }; |
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76 | |
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77 | template<class T> |
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78 | class buffered_object |
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79 | { |
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80 | public: |
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81 | |
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82 | inline buffered_object(): |
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83 | _array(DisplaySettings::instance()->getMaxNumberOfGraphicsContexts()) |
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84 | {} |
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85 | |
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86 | inline buffered_object(unsigned int size): |
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87 | _array(size) |
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88 | {} |
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89 | |
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90 | buffered_object& operator = (const buffered_object& rhs) |
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91 | { |
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92 | _array = rhs._array; |
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93 | return *this; |
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94 | } |
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95 | |
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96 | inline void setAllElementsTo(const T& t) { std::fill(_array.begin(),_array.end(),t); } |
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97 | |
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98 | inline void clear() { _array.clear(); } |
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99 | |
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100 | inline bool empty() const { return _array.empty(); } |
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101 | |
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102 | inline unsigned int size() const { return _array.size(); } |
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103 | |
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104 | inline void resize(unsigned int newSize) { _array.resize(newSize); } |
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105 | |
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106 | inline T& operator[] (unsigned int pos) |
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107 | { |
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108 | // automatically resize array. |
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109 | if (_array.size()<=pos) |
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110 | _array.resize(pos+1); |
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111 | |
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112 | return _array[pos]; |
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113 | } |
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114 | |
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115 | inline const T& operator[] (unsigned int pos) const |
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116 | { |
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117 | // automatically resize array. |
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118 | if (_array.size()<=pos) |
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119 | _array.resize(pos+1); |
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120 | |
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121 | return _array[pos]; |
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122 | } |
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123 | |
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124 | |
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125 | protected: |
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126 | |
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127 | mutable std::vector<T> _array; |
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128 | }; |
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129 | |
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130 | } |
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131 | |
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132 | #endif |
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