1 | /*
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2 | glh - is a platform-indepenedent C++ OpenGL helper library
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3 |
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4 |
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5 | Copyright (c) 2000 Cass Everitt
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6 | Copyright (c) 2000 NVIDIA Corporation
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7 | All rights reserved.
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8 |
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9 | Redistribution and use in source and binary forms, with or
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10 | without modification, are permitted provided that the following
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11 | conditions are met:
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12 |
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13 | * Redistributions of source code must retain the above
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14 | copyright notice, this list of conditions and the following
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15 | disclaimer.
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16 |
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17 | * Redistributions in binary form must reproduce the above
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18 | copyright notice, this list of conditions and the following
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19 | disclaimer in the documentation and/or other materials
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20 | provided with the distribution.
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21 |
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22 | * The names of contributors to this software may not be used
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23 | to endorse or promote products derived from this software
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24 | without specific prior written permission.
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25 |
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26 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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27 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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28 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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29 | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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30 | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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31 | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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32 | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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33 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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34 | CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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35 | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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36 | ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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37 | POSSIBILITY OF SUCH DAMAGE.
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38 |
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39 |
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40 | Cass Everitt - cass@r3.nu
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41 | */
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42 |
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43 | #ifndef GLH_GLUT_TEXT_H
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44 | #define GLH_GLUT_TEXT_H
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45 |
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46 | #include <glh/glh_obs.h>
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47 | #include <glh/glh_text.h>
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48 |
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49 | #ifdef MACOS
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50 | #include <GLUT/glut.h>
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51 | #else
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52 | #include <GL/glut.h>
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53 | #endif
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54 |
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55 | namespace glh
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56 | {
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57 |
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58 | struct glut_stroke_roman : font
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59 | {
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60 | glut_stroke_roman() : initialized(false) {}
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61 |
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62 | virtual ~glut_stroke_roman() { }
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63 |
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64 | struct glyph
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65 | {
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66 | float width;
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67 | display_list dl;
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68 | };
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69 |
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70 |
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71 | // get font metrics
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72 | virtual float get_ascent()
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73 | { return 119.05f; }
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74 | virtual float get_descent()
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75 | { return 33.33f; }
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76 | virtual float get_width(int i)
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77 | {
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78 | if(32 <= i && i <= 127)
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79 | {
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80 | if(! initialized) init();
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81 | return glyphs[i].width;
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82 | }
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83 | return 0;
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84 | }
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85 |
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86 | // draw
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87 | virtual void render(int i)
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88 | {
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89 | if(32 <= i && i <= 127)
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90 | {
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91 | if(! initialized) init();
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92 | glyphs[i].dl.call_list();
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93 | }
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94 | }
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95 |
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96 | virtual void initialize() { if(! initialized) init(); }
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97 |
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98 | bool initialized;
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99 | glyph glyphs[128];
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100 |
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101 | private:
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102 |
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103 | void init()
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104 | {
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105 | initialized = true;
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106 | GLfloat m[16];
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107 | glColorMask(0,0,0,0);
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108 | glDepthMask(0);
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109 | glStencilMask(0);
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110 | for(int i=32; i < 128; i++)
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111 | {
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112 | glPushMatrix();
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113 | glLoadIdentity();
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114 |
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115 | // build display list
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116 | glyphs[i].dl.new_list(GL_COMPILE_AND_EXECUTE);
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117 | glutStrokeCharacter(GLUT_STROKE_ROMAN, i);
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118 | glyphs[i].dl.end_list();
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119 | // get *float* character width (glut only returns integer width)
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120 | glGetFloatv(GL_MODELVIEW_MATRIX, m);
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121 | glyphs[i].width = m[12];
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122 |
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123 | glPopMatrix();
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124 | }
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125 | glColorMask(1,1,1,1);
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126 | glDepthMask(1);
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127 | glStencilMask(1);
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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 |
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133 | struct glut_stroke_mono_roman : font
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134 | {
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135 | glut_stroke_mono_roman() : initialized(false) {}
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136 |
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137 | virtual ~glut_stroke_mono_roman() { }
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138 |
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139 | struct glyph
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140 | {
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141 | display_list dl;
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142 | };
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143 |
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144 |
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145 | // get font metrics
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146 | virtual float get_ascent()
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147 | { return 119.05f; }
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148 | virtual float get_descent()
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149 | { return 33.33f; }
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150 | virtual float get_width(int i)
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151 | {
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152 | if(32 <= i && i <= 127)
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153 | {
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154 | if(! initialized) init();
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155 | return 104.76;
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156 | }
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157 | return 0;
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158 | }
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159 |
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160 | // draw
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161 | virtual void render(int i)
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162 | {
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163 | if(32 <= i && i <= 127)
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164 | {
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165 | if(! initialized) init();
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166 | glyphs[i].dl.call_list();
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167 | }
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168 | }
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169 |
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170 | virtual void initialize() { if(! initialized) init(); }
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171 |
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172 | bool initialized;
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173 | glyph glyphs[128];
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174 |
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175 | private:
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176 |
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177 | void init()
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178 | {
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179 | initialized = true;
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180 | for(int i=32; i < 128; i++)
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181 | {
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182 | // build display list
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183 | glyphs[i].dl.new_list(GL_COMPILE);
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184 | glutStrokeCharacter(GLUT_STROKE_MONO_ROMAN, i);
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185 | glyphs[i].dl.end_list();
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186 | }
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187 | }
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188 |
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189 | };
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190 |
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191 |
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192 |
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193 | }
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194 |
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195 | #endif
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