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annotate src/txt-eng-ft.cc @ 12122:f4689107dd8c

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Explicitly disallow copying in some classes.
author Pascal Dupuis <Pascal.Dupuis@uclouvain.be>
date Sat, 22 Jan 2011 02:21:52 -0500
parents 12df7854fa7c
children 9ea6f69259d7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 2009-2011 Michael Goffioul
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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 HAVE_FREETYPE
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28
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29 #if HAVE_FONTCONFIG
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30 #include <fontconfig/fontconfig.h>
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31 #endif
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32
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33 #include <iostream>
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34
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35 #include "error.h"
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36 #include "pr-output.h"
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37 #include "txt-eng-ft.h"
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38
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39 class
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40 ft_manager
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41 {
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42 public:
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43 static bool instance_ok (void)
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44 {
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45 bool retval = true;
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46
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47 if (! instance)
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48 instance = new ft_manager ();
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49
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50 if (! instance)
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51 {
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52 ::error ("unable to create ft_manager!");
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53
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54 retval = false;
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55 }
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56
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57 return retval;
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58 }
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59
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60 static FT_Face get_font (const std::string& name, const std::string& weight,
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61 const std::string& angle, double size)
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62 { return (instance_ok ()
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63 ? instance->do_get_font (name, weight, angle, size)
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64 : 0); }
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65
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66 private:
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67
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68 static ft_manager *instance;
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69
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70 private:
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71
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72 // No copying!
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73
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74 ft_manager (const ft_manager&);
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75
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76 ft_manager& operator = (const ft_manager&);
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77
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78 ft_manager (void)
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79 {
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80 if (FT_Init_FreeType (&library))
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81 {
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82 ::error ("unable to initialize freetype library");
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83 }
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84
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85 #if HAVE_FONTCONFIG
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86 fc_init_done = false;
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87 if (! FcInit ())
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88 {
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89 ::error ("unable to initialize fontconfig library");
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90 }
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91 else
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92 {
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93 fc_init_done = true;
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94 }
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95 #endif
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96 }
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97
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98 ~ft_manager (void)
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99 {
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100 #if HAVE_FONTCONFIG
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101 FcFini ();
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102 fc_init_done = false;
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103 #endif
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104 }
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105
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106 FT_Face do_get_font (const std::string& name, const std::string& weight,
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107 const std::string& angle, double size)
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108 {
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109 FT_Face retval = 0;
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110
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111 std::string file;
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112
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113 #if HAVE_FONTCONFIG
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114 if (fc_init_done)
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115 {
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116 int fc_weight, fc_angle;
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117
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118 if (weight == "bold")
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119 fc_weight = FC_WEIGHT_BOLD;
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120 else if (weight == "light")
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121 fc_weight = FC_WEIGHT_LIGHT;
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122 else if (weight == "demi")
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123 fc_weight = FC_WEIGHT_DEMIBOLD;
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124 else
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125 fc_weight = FC_WEIGHT_NORMAL;
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126
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127 if (angle == "italic")
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128 fc_angle = FC_SLANT_ITALIC;
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129 else if (angle == "oblique")
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130 fc_angle = FC_SLANT_OBLIQUE;
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131 else
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132 fc_angle = FC_SLANT_ROMAN;
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133
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134 FcPattern *pat = FcPatternCreate ();
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135
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136 FcPatternAddString (pat, FC_FAMILY,
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137 (reinterpret_cast<const FcChar8*>
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138 (name == "*" ? "sans" : name.c_str ())));
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139
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140 FcPatternAddInteger (pat, FC_WEIGHT, fc_weight);
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141 FcPatternAddInteger (pat, FC_SLANT, fc_angle);
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142 FcPatternAddDouble (pat, FC_PIXEL_SIZE, size);
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143
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144 if (FcConfigSubstitute (0, pat, FcMatchPattern))
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145 {
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146 FcResult res;
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147 FcPattern *match;
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148
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149 FcDefaultSubstitute (pat);
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150 match = FcFontMatch (0, pat, &res);
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diff changeset
151
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152 // FIXME -- originally, this test also required that
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153 // res != FcResultNoMatch. Is that really needed?
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154 if (match)
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155 {
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156 unsigned char *tmp;
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157
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158 FcPatternGetString (match, FC_FILE, 0, &tmp);
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159 file = reinterpret_cast<char*> (tmp);
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160 }
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161 else
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162 ::warning ("could not match any font: %s-%s-%s-%g",
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163 name.c_str (), weight.c_str (), angle.c_str (),
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164 size);
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165
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166 if (match)
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167 FcPatternDestroy (match);
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168 }
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169
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170 FcPatternDestroy (pat);
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171 }
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172 #endif
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173
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174 if (file.empty ())
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175 {
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176 #ifdef __WIN32__
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177 file = "C:/WINDOWS/Fonts/verdana.ttf";
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178 #else
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179 // FIXME: find a "standard" font for UNIX platforms
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180 #endif
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181 }
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182
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183 if (! file.empty () && FT_New_Face (library, file.c_str (), 0, &retval))
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184 ::warning ("ft_manager: unable to load font: %s", file.c_str ());
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185
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186 return retval;
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187 }
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188
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189 private:
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190 FT_Library library;
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191 #if HAVE_FONTCONFIG
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192 bool fc_init_done;
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193 #endif
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194 };
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195
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196 ft_manager* ft_manager::instance = 0;
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197
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198 // ---------------------------------------------------------------------------
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199
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200 ft_render::ft_render (void)
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201 : text_processor (), face (0), bbox (1, 4, 0.0),
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202 xoffset (0), yoffset (0), mode (MODE_BBOX),
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203 red (0), green (0), blue (0)
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204 {
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205 }
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diff changeset
206
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diff changeset
207 ft_render::~ft_render (void)
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208 {
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209 if (face)
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diff changeset
210 FT_Done_Face (face);
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211 }
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212
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213 void
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diff changeset
214 ft_render::set_font (const std::string& name, const std::string& weight,
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diff changeset
215 const std::string& angle, double size)
9403
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216 {
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217 if (face)
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diff changeset
218 FT_Done_Face (face);
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219
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220 // FIXME: take "fontunits" into account
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diff changeset
221 face = ft_manager::get_font (name, weight, angle, size);
9403
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222
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diff changeset
223 if (face)
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diff changeset
224 {
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diff changeset
225 if (FT_Set_Char_Size (face, 0, size*64, 0, 0))
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226 ::warning ("ft_render: unable to set font size to %d", size);
9403
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227 }
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diff changeset
228 else
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229 ::warning ("ft_render: unable to load appropriate font");
9403
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diff changeset
230 }
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diff changeset
231
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diff changeset
232 void
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diff changeset
233 ft_render::set_mode (int m)
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diff changeset
234 {
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diff changeset
235 mode = m;
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diff changeset
236
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diff changeset
237 switch (mode)
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diff changeset
238 {
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diff changeset
239 case MODE_BBOX:
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240 xoffset = yoffset = 0;
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diff changeset
241 bbox = Matrix (1, 4, 0.0);
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diff changeset
242 break;
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diff changeset
243 case MODE_RENDER:
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diff changeset
244 if (bbox.numel () != 4)
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245 {
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246 ::warning ("ft_render: invalid bounding box, cannot render");
9403
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diff changeset
247
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248 xoffset = yoffset = 0;
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249 pixels = uint8NDArray ();
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250 }
9403
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diff changeset
251 else
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diff changeset
252 {
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diff changeset
253 pixels = uint8NDArray (dim_vector (4, bbox(2), bbox(3)),
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diff changeset
254 static_cast<uint8_t> (0));
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diff changeset
255 xoffset = 0;
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256 yoffset = -bbox(1)-1;
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diff changeset
257 }
9403
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parents:
diff changeset
258 break;
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parents:
diff changeset
259 default:
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diff changeset
260 ::error ("ft_render: invalid mode `%d'", mode);
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parents:
diff changeset
261 break;
4af6e29449c1 [mq]: graphics_text_engine
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parents:
diff changeset
262 }
4af6e29449c1 [mq]: graphics_text_engine
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parents:
diff changeset
263 }
4af6e29449c1 [mq]: graphics_text_engine
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parents:
diff changeset
264
4af6e29449c1 [mq]: graphics_text_engine
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parents:
diff changeset
265 void
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parents:
diff changeset
266 ft_render::visit (text_element_string& e)
4af6e29449c1 [mq]: graphics_text_engine
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parents:
diff changeset
267 {
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diff changeset
268 if (face)
9403
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diff changeset
269 {
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diff changeset
270 std::string str = e.string_value ();
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diff changeset
271 FT_UInt glyph_index, previous = 0;
9403
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parents:
diff changeset
272
10553
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parents: 10402
diff changeset
273 for (size_t i = 0; i < str.length (); i++)
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diff changeset
274 {
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diff changeset
275 glyph_index = FT_Get_Char_Index (face, str[i]);
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diff changeset
276
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diff changeset
277 if (! glyph_index
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278 || FT_Load_Glyph (face, glyph_index, FT_LOAD_DEFAULT))
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diff changeset
279 ::warning ("ft_render: skipping missing glyph for character `%c'",
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diff changeset
280 str[i]);
57a59eae83cc untabify src C++ source files
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diff changeset
281 else
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diff changeset
282 {
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diff changeset
283 switch (mode)
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diff changeset
284 {
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diff changeset
285 case MODE_RENDER:
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diff changeset
286 if (FT_Render_Glyph (face->glyph, FT_RENDER_MODE_NORMAL))
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diff changeset
287 ::warning ("ft_render: unable to render glyph for character `%c'",
57a59eae83cc untabify src C++ source files
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diff changeset
288 str[i]);
57a59eae83cc untabify src C++ source files
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parents: 9833
diff changeset
289 else
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John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
290 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
291 FT_Bitmap& bitmap = face->glyph->bitmap;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
292 int x0, y0;
9616
2093499ec9f4 avoid crash if default font can't be found
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parents: 9406
diff changeset
293
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
294 if (previous)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
295 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
296 FT_Vector delta;
9616
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parents: 9406
diff changeset
297
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parents: 9833
diff changeset
298 FT_Get_Kerning (face, previous, glyph_index, FT_KERNING_DEFAULT, &delta);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
299 xoffset += (delta.x >> 6);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
300 }
9403
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parents:
diff changeset
301
10315
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John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
302 x0 = xoffset+face->glyph->bitmap_left;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
303 y0 = yoffset+face->glyph->bitmap_top;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
304 for (int r = 0; r < bitmap.rows; r++)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
305 for (int c = 0; c < bitmap.width; c++)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
306 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
307 unsigned char pix = bitmap.buffer[r*bitmap.width+c];
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
308 if (x0+c < 0 || x0+c >= pixels.dim2()
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
309 || y0-r < 0 || y0-r >= pixels.dim3())
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
310 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
311 //::error ("out-of-bound indexing!!");
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
312 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
313 else if (pixels(3, x0+c, y0-r).value () == 0)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
314 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
315 pixels(0, x0+c, y0-r) = red;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
316 pixels(1, x0+c, y0-r) = green;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
317 pixels(2, x0+c, y0-r) = blue;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
318 pixels(3, x0+c, y0-r) = pix;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
319 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
320 }
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
321
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
322 xoffset += (face->glyph->advance.x >> 6);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
323 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
324 break;
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
325
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
326 case MODE_BBOX:
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
327 // width
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
328 if (previous)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
329 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
330 FT_Vector delta;
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
331
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
332 FT_Get_Kerning (face, previous, glyph_index, FT_KERNING_DEFAULT, &delta);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
333 bbox(2) += (delta.x >> 6);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
334 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
335 bbox(2) += (face->glyph->advance.x >> 6);
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
336
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
337 int asc, desc;
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
338
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
339 if (false /*tight*/)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
340 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
341 desc = face->glyph->metrics.horiBearingY - face->glyph->metrics.height;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
342 asc = face->glyph->metrics.horiBearingY;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
343 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
344 else
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
345 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
346 asc = face->size->metrics.ascender;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
347 desc = face->size->metrics.descender;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
348 }
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
349
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
350 asc = yoffset + (asc >> 6);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
351 desc = yoffset + (desc >> 6);
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
352
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
353 if (desc < bbox(1))
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
354 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
355 bbox(3) += (bbox(1) - desc);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
356 bbox(1) = desc;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
357 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
358 if (asc > (bbox(3)+bbox(1)))
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
359 bbox(3) = asc-bbox(1);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
360 break;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
361 }
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
362
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
363 previous = glyph_index;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
364 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
365 }
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
366 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
367 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
368
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
369 void
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
370 ft_render::reset (void)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
371 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
372 set_mode (MODE_BBOX);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
373 set_color (Matrix (1, 3, 0.0));
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
374 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
375
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
376 void
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
377 ft_render::set_color (Matrix c)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
378 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
379 if (c.numel () == 3)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
380 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
381 red = static_cast<uint8_t> (c(0)*255);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
382 green = static_cast<uint8_t> (c(1)*255);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
383 blue = static_cast<uint8_t> (c(2)*255);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
384 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
385 else
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
386 ::warning ("ft_render::set_color: invalid color");
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
387 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
388
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
389 uint8NDArray
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
390 ft_render::render (text_element* elt, Matrix& box, int rotation)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
391 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
392 set_mode (MODE_BBOX);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
393 elt->accept (*this);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
394 box = bbox;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
395
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
396 set_mode (MODE_RENDER);
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
397 if (pixels.numel () > 0)
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
398 {
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
399 elt->accept (*this);
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
400
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
401 switch (rotation)
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
402 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
403 case ROTATION_0:
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
404 break;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
405 case ROTATION_90:
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
406 {
11570
57632dea2446 attempt better backward compatibility for Array constructors
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
407 Array<octave_idx_type> perm (dim_vector (3, 1));
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
408 perm(0) = 0;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
409 perm(1) = 2;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
410 perm(2) = 1;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
411 pixels = pixels.permute (perm);
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
412
11570
57632dea2446 attempt better backward compatibility for Array constructors
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
413 Array<idx_vector> idx (dim_vector (3, 1));
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
414 idx(0) = idx_vector (':');
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
415 idx(1) = idx_vector (pixels.dim2()-1, -1, -1);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
416 idx(2) = idx_vector (':');
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
417 pixels = uint8NDArray (pixels.index (idx));
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
418 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
419 break;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
420 case ROTATION_180:
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
421 {
11570
57632dea2446 attempt better backward compatibility for Array constructors
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
422 Array<idx_vector> idx (dim_vector (3, 1));
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
423 idx(0) = idx_vector (':');
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
424 idx(1) = idx_vector (pixels.dim2()-1, -1, -1);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
425 idx(2)= idx_vector (pixels.dim3()-1, -1, -1);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
426 pixels = uint8NDArray (pixels.index (idx));
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
427 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
428 break;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
429 case ROTATION_270:
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
430 {
11570
57632dea2446 attempt better backward compatibility for Array constructors
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
431 Array<octave_idx_type> perm (dim_vector (3, 1));
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
432 perm(0) = 0;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
433 perm(1) = 2;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
434 perm(2) = 1;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
435 pixels = pixels.permute (perm);
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
436
11570
57632dea2446 attempt better backward compatibility for Array constructors
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
437 Array<idx_vector> idx (dim_vector (3, 1));
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
438 idx(0) = idx_vector (':');
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
439 idx(1) = idx_vector (':');
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
440 idx(2) = idx_vector (pixels.dim3()-1, -1, -1);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
441 pixels = uint8NDArray (pixels.index (idx));
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
442 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
443 break;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
444 }
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
445 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
446
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
447 return pixels;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
448 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
449
10402
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
450 Matrix
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
451 ft_render::get_extent (text_element *elt, double rotation)
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
452 {
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
453 set_mode (MODE_BBOX);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
454 elt->accept (*this);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
455
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
456 Matrix extent (1, 2, 0.0);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
457
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
458 switch (rotation_to_mode (rotation))
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
459 {
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
460 case ROTATION_0:
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
461 case ROTATION_180:
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
462 extent(0) = bbox(2);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
463 extent(1) = bbox(3);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
464 break;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
465 case ROTATION_90:
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
466 case ROTATION_270:
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
467 extent(0) = bbox(3);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
468 extent(1) = bbox(2);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
469 }
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
470
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
471 return extent;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
472 }
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
473
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
474 int
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
475 ft_render::rotation_to_mode (double rotation) const
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
476 {
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
477 if (rotation == 0.0)
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
478 return ROTATION_0;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
479 else if (rotation == 90.0)
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
480 return ROTATION_90;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
481 else if (rotation == 180.0)
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
482 return ROTATION_180;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
483 else if (rotation == 270.0)
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
484 return ROTATION_270;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
485 else
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
486 return ROTATION_0;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
487 }
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
488
11455
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
489 void
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
490 ft_render::text_to_pixels (const std::string& txt,
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
491 uint8NDArray& pixels_, Matrix& box,
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
492 int halign, int valign, double rotation)
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
493 {
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
494 // FIXME: clip "rotation" between 0 and 360
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
495 int rot_mode = rotation_to_mode (rotation);
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
496
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
497 text_element *elt = text_parser_none ().parse (txt);
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
498 pixels_ = render (elt, box, rot_mode);
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
499 delete elt;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
500
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
501 if (pixels_.numel () == 0)
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
502 {
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
503 // nothing to render
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
504 return;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
505 }
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
506
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
507 switch (halign)
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
508 {
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
509 default: box(0) = 0; break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
510 case 1: box(0) = -box(2)/2; break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
511 case 2: box(0) = -box(2); break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
512 }
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
513 switch (valign)
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
514 {
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
515 default: box(1) = 0; break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
516 case 1: box(1) = -box(3)/2; break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
517 case 2: box(1) = -box(3); break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
518 case 3: break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
519 }
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
520
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
521 switch (rot_mode)
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
522 {
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
523 case ROTATION_90:
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
524 std::swap (box(0), box(1));
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
525 std::swap (box(2), box(3));
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
526 box(0) = -box(0)-box(2);
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
527 break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
528 case ROTATION_180:
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
529 box(0) = -box(0)-box(2);
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
530 box(1) = -box(1)-box(3);
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
531 break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
532 case ROTATION_270:
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
533 std::swap (box(0), box(1));
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
534 std::swap (box(2), box(3));
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
535 box(1) = -box(1)-box(3);
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
536 break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
537 }
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
538 }
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
539
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
540 #endif // HAVE_FREETYPE