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annotate src/gl2ps-renderer.cc @ 14626:f947d2922feb stable rc-3-6-2-0

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3.6.2-rc0 release candidate * configure.ac (AC_INIT): Version is now 3.6.2-rc0. (OCTAVE_RELEASE_DATE): Now 2012-05-11.
author John W. Eaton <jwe@octave.org>
date Fri, 11 May 2012 13:46:18 -0400
parents 81ee6b12adbc
children 6b2448555bbd
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1 /*
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2
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72c96de7a403 maint: update copyright notices for 2012
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3 Copyright (C) 2009-2012 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 = fdopen (fid, "wb");
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47
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48 if (! fp)
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49 {
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50 error ("gl2ps-renderer: fdopen failed");
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51 return;
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52 }
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53
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54 GLint buffsize = 0, state = GL2PS_OVERFLOW;
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55 GLint viewport[4];
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56
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57 glGetIntegerv (GL_VIEWPORT, viewport);
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58
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59 GLint gl2ps_term;
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60 if (term.find ("eps") != std::string::npos) gl2ps_term = GL2PS_EPS;
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61 else if (term.find ("pdf") != std::string::npos) gl2ps_term = GL2PS_PDF;
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62 else if (term.find ("svg") != std::string::npos) gl2ps_term = GL2PS_SVG;
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63 else if (term.find ("ps") != std::string::npos) gl2ps_term = GL2PS_PS;
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64 else if (term.find ("pgf") != std::string::npos) gl2ps_term = GL2PS_PGF;
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65 else if (term.find ("tex") != std::string::npos) gl2ps_term = GL2PS_TEX;
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66 else
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67 {
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68 error ("gl2ps-renderer:: Unknown terminal");
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69 return;
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70 }
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71
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72 GLint gl2ps_text = 0;
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73 if (term.find ("notxt") != std::string::npos) gl2ps_text = GL2PS_NO_TEXT;
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74
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75 while (state == GL2PS_OVERFLOW)
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76 {
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77 buffsize += 1024*1024;
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78 gl2psBeginPage ("glps_renderer figure", "Octave", viewport,
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79 gl2ps_term, GL2PS_BSP_SORT,
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80 (GL2PS_SILENT | GL2PS_SIMPLE_LINE_OFFSET
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81 | GL2PS_NO_BLENDING | GL2PS_OCCLUSION_CULL
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82 | GL2PS_BEST_ROOT | gl2ps_text
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83 | GL2PS_NO_PS3_SHADING),
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84 GL_RGBA, 0, NULL, 0, 0, 0,
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85 buffsize, fp, "" );
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86
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87 opengl_renderer::draw (go);
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88 state = gl2psEndPage ();
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89 }
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90
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91 gnulib::fclose (fp);
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92
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93 in_draw = 0;
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94 }
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95 else
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96 opengl_renderer::draw (go);
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97 }
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98
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99 int
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100 glps_renderer::alignment_to_mode (int ha, int va) const
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101 {
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102 int gl2psa=GL2PS_TEXT_BL;
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103 if (ha == 0)
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104 {
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105 if (va == 0 || va == 3)
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106 gl2psa=GL2PS_TEXT_BL;
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107 else if (va == 2)
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108 gl2psa=GL2PS_TEXT_TL;
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109 else if (va == 1)
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110 gl2psa=GL2PS_TEXT_CL;
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111 }
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112 else if (ha == 2)
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113 {
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114 if (va == 0 || va == 3)
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115 gl2psa=GL2PS_TEXT_BR;
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116 else if (va == 2)
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117 gl2psa=GL2PS_TEXT_TR;
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118 else if (va == 1)
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119 gl2psa=GL2PS_TEXT_CR;
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120 }
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121 else if (ha == 1)
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122 {
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123 if (va == 0 || va == 3)
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124 gl2psa=GL2PS_TEXT_B;
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125 else if (va == 2)
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126 gl2psa=GL2PS_TEXT_T;
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127 else if (va == 1)
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128 gl2psa=GL2PS_TEXT_C;
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129 }
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130 return gl2psa;
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131 }
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132
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133 Matrix
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134 glps_renderer::render_text (const std::string& txt,
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135 double x, double y, double z,
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136 int ha, int va, double rotation)
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137 {
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138 if (txt.empty ())
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139 return Matrix (1, 4, 0.0);
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140
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141 glRasterPos3d (x, y, z);
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142 gl2psTextOpt (txt.c_str (), fontname.c_str (), fontsize,
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143 alignment_to_mode (ha, va), rotation);
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144
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145 // FIXME? -- we have no way of getting a bounding box from gl2ps, so
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146 // we use freetype
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147 Matrix bbox;
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148 uint8NDArray pixels;
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149 text_to_pixels (txt, pixels, bbox, 0, 0, rotation);
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150 return bbox;
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151 }
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152
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153 void
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154 glps_renderer::set_font (const base_properties& props)
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155 {
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156 opengl_renderer::set_font (props);
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157
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158 fontsize = props.get ("fontsize").double_value ();
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159
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160 caseless_str fn = props.get ("fontname").string_value ();
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161 fontname = "";
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162 if (fn == "times" || fn == "times-roman")
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163 fontname = "Times-Roman";
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164 else if (fn == "courier")
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165 fontname = "Courier";
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166 else if (fn == "symbol")
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167 fontname = "Symbol";
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168 else if (fn == "zapfdingbats")
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169 fontname = "ZapfDingbats";
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170 else
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171 fontname = "Helvetica";
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172
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173 // FIXME -- add support for bold and italic
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174 }
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175
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176 template <typename T>
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177 static void
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178 draw_pixels (GLsizei w, GLsizei h, GLenum format, const T *data)
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179 {
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180 OCTAVE_LOCAL_BUFFER (GLfloat, a, 3*w*h);
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181
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182 for (int i = 0; i < 3*w*h; i++)
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183 a[i] = data[i];
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184
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185 gl2psDrawPixels (w, h, 0, 0, format, GL_FLOAT, a);
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186 }
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187
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188 void
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189 glps_renderer::draw_pixels (GLsizei w, GLsizei h, GLenum format,
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190 GLenum type, const GLvoid *data)
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191 {
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192 if (type == GL_UNSIGNED_SHORT)
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193 ::draw_pixels (w, h, format, static_cast<const GLushort *> (data));
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194 else if (type == GL_UNSIGNED_BYTE)
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195 ::draw_pixels (w, h, format, static_cast<const GLubyte *> (data));
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196 else
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197 gl2psDrawPixels (w, h, 0, 0, format, type, data);
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198 }
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199
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200 void
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201 glps_renderer::draw_text (const text::properties& props)
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202 {
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203 if (props.get_string ().is_empty ())
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204 return;
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205
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206 set_font (props);
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207 set_color (props.get_color_rgb ());
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208
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209 const Matrix pos = get_transform ().scale (props.get_data_position ());
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210 int halign = 0, valign = 0;
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211
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212 if (props.horizontalalignment_is ("center"))
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213 halign = 1;
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214 else if (props.horizontalalignment_is ("right"))
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215 halign = 2;
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216
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217 if (props.verticalalignment_is ("top"))
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218 valign = 2;
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219 else if (props.verticalalignment_is ("baseline"))
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220 valign = 3;
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221 else if (props.verticalalignment_is ("middle"))
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222 valign = 1;
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223
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224 // FIXME: handle margin and surrounding box
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225
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226 glRasterPos3d (pos(0), pos(1), pos(2));
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227
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228 octave_value string_prop = props.get_string ();
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229
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230 string_vector sv = string_prop.all_strings ();
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231
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232 std::string s = sv.join ("\n");
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233
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234 gl2psTextOpt (s.c_str (), fontname.c_str (), fontsize,
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235 alignment_to_mode (halign, valign), props.get_rotation ());
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236 }
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237
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238 #endif