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annotate src/gl2ps-renderer.cc @ 9834:92d8f35ff217

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compute bounding boxes for text in opengl graphics backend
author Shai Ayal <shaiay@users.sourceforge.net>
date Wed, 18 Nov 2009 23:14:09 -0500
parents 2d6a5af744b6
children 7dedfd70dd9f
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9798
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1 /*
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2
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3 Copyright (C) 2009 Shai Ayal
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #if defined (HAVE_OPENGL)
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28
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29 #include <cstdio>
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30
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31 #include "lo-mappers.h"
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32 #include "oct-locbuf.h"
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33
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34 #include "gl2ps-renderer.h"
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35 #include "gl2ps.h"
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36
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37 void
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38 glps_renderer::draw (const graphics_object& go)
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39 {
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40 static bool in_draw = false;
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41
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42 if (!in_draw)
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43 {
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44 in_draw = true;
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45
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46 FILE *fp = fopen (filename.c_str (), "wb");
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47 GLint buffsize = 0, state = GL2PS_OVERFLOW;
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48 GLint viewport[4];
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49
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50 glGetIntegerv (GL_VIEWPORT, viewport);
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51
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52 while (state == GL2PS_OVERFLOW)
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53 {
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54 buffsize += 1024*1024;
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55 gl2psBeginPage ("glps_renderer figure", "Octave", viewport,
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56 GL2PS_EPS, GL2PS_BSP_SORT,
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57 (GL2PS_SILENT | GL2PS_SIMPLE_LINE_OFFSET
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58 | GL2PS_NO_BLENDING | GL2PS_OCCLUSION_CULL
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59 | GL2PS_BEST_ROOT), GL_RGBA, 0, NULL, 0, 0, 0,
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60 buffsize, fp, filename.c_str () );
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61
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62 opengl_renderer::draw (go);
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63 state = gl2psEndPage ();
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64 }
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65
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66 fclose (fp);
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67
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68 in_draw = 0;
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69 }
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70 else
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71 opengl_renderer::draw (go);
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72 }
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73
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74 Matrix
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75 glps_renderer::render_text (const std::string& txt,
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76 double x, double y, double z,
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77 int ha, int va, double rotation)
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78 {
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79 if (txt.empty ())
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80 return Matrix (1, 4, 0.0);
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81
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82 int gl2psa=GL2PS_TEXT_BL;
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83 if (ha == 0)
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84 {
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85 if (va == 0 || va == 3)
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86 gl2psa=GL2PS_TEXT_BL;
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87 else if (va == 2)
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88 gl2psa=GL2PS_TEXT_TL;
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89 else if (va == 1)
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90 gl2psa=GL2PS_TEXT_CL;
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91 }
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92 else if (ha == 2)
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93 {
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94 if (va == 0 || va == 3)
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95 gl2psa=GL2PS_TEXT_BR;
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96 else if (va == 2)
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97 gl2psa=GL2PS_TEXT_TR;
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98 else if (va == 1)
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99 gl2psa=GL2PS_TEXT_CR;
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100 }
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101 else if (ha == 1)
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102 {
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103 if (va == 0 || va == 3)
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104 gl2psa=GL2PS_TEXT_B;
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105 else if (va == 2)
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106 gl2psa=GL2PS_TEXT_T;
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107 else if (va == 1)
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108 gl2psa=GL2PS_TEXT_C;
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109 }
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110
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111 glRasterPos3d (x, y, z);
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112
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113 gl2psTextOpt (txt.c_str (), fontname.c_str (), fontsize, gl2psa, rotation);
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114
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115 // FIXME? -- we have no way of getting a bounding box from gl2ps, so
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116 // we use freetype
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117 Matrix bbox;
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118 uint8NDArray pixels;
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119 int rot_mode;
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120 text_to_pixels (txt, rotation, pixels, bbox, rot_mode);
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121
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122 return bbox;
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123 }
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124
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125 void
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126 glps_renderer::set_font (const base_properties& props)
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127 {
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128 opengl_renderer::set_font (props);
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129
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130 fontsize = props.get ("fontsize").double_value ();
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131
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132 caseless_str fn = props.get ("fontname").string_value ();
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133 fontname = "";
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134 if (fn == "times" || fn == "times-roman")
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135 fontname = "Times-Roman";
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136 else if (fn == "courier")
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137 fontname = "Courier";
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138 else if (fn == "symbol")
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139 fontname = "Symbol";
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140 else if (fn == "zapfdingbats")
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141 fontname = "ZapfDingbats";
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142 else
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143 fontname = "Helvetica";
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144
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145 // FIXME -- add support for bold and italic
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146 }
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147
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148 #endif
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149
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150 /*
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151 ;;; Local Variables: ***
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152 ;;; mode: C++ ***
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153 ;;; End: ***
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154 */