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annotate src/txt-eng-ft.cc @ 9616:2093499ec9f4

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avoid crash if default font can't be found
author John W. Eaton <jwe@octave.org>
date Fri, 04 Sep 2009 17:47:03 -0400
parents c0c23dbbade7
children b0b82ab654f6
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1 /*
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2
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3 Copyright (C) 2009 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 static ft_manager *instance;
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68
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69 private:
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70 ft_manager (void)
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71 {
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72 if (FT_Init_FreeType (&library))
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73 {
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74 ::error ("unable to initialize freetype library");
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75 }
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76
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77 #if HAVE_FONTCONFIG
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78 fc_init_done = false;
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79 if (! FcInit ())
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80 {
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81 ::error ("unable to initialize fontconfig library");
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82 }
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83 else
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84 {
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85 fc_init_done = true;
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86 }
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87 #endif
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88 }
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89
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90 ~ft_manager (void)
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91 {
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92 #if HAVE_FONTCONFIG
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93 FcFini ();
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94 fc_init_done = false;
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95 #endif
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96 }
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97
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98 FT_Face do_get_font (const std::string& name, const std::string& weight,
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99 const std::string& angle, double size)
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100 {
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101 FT_Face retval = 0;
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102
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103 std::string file;
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104
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105 #if HAVE_FONTCONFIG
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106 if (fc_init_done)
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107 {
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108 int fc_weight, fc_angle;
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109
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110 if (weight == "bold")
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111 fc_weight = FC_WEIGHT_BOLD;
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112 else if (weight == "light")
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113 fc_weight = FC_WEIGHT_LIGHT;
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114 else if (weight == "demi")
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115 fc_weight = FC_WEIGHT_DEMIBOLD;
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116 else
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117 fc_weight = FC_WEIGHT_NORMAL;
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118
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119 if (angle == "italic")
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120 fc_angle = FC_SLANT_ITALIC;
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121 else if (angle == "oblique")
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122 fc_angle = FC_SLANT_OBLIQUE;
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123 else
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124 fc_angle = FC_SLANT_ROMAN;
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125
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126 FcPattern *pat = FcPatternCreate ();
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127
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128 FcPatternAddString (pat, FC_FAMILY,
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129 (reinterpret_cast<const FcChar8*>
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130 (name == "*" ? "sans" : name.c_str ())));
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131
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132 FcPatternAddInteger (pat, FC_WEIGHT, fc_weight);
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133 FcPatternAddInteger (pat, FC_SLANT, fc_angle);
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134 FcPatternAddDouble (pat, FC_PIXEL_SIZE, size);
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135
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136 if (FcConfigSubstitute (0, pat, FcMatchPattern))
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137 {
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138 FcResult res;
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139 FcPattern *match;
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140
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141 FcDefaultSubstitute (pat);
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142 match = FcFontMatch (0, pat, &res);
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143 match = 0;
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144
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
145 if (match && res != FcResultNoMatch)
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
146 {
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
147 unsigned char *tmp;
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
148
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
149 FcPatternGetString (match, FC_FILE, 0, &tmp);
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
150 file = reinterpret_cast<char*> (tmp);
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
151 }
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
152 else
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153 ::warning ("could not match any font: %s-%s-%s-%g",
9403
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parents:
diff changeset
154 name.c_str (), weight.c_str (), angle.c_str (),
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
155 size);
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
156
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
157 if (match)
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
158 FcPatternDestroy (match);
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
159 }
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
160
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
161 FcPatternDestroy (pat);
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
162 }
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
163 #endif
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
164
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
165 if (file.empty ())
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
166 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
167 #ifdef __WIN32__
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diff changeset
168 file = "C:/WINDOWS/Fonts/verdana.ttf";
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parents:
diff changeset
169 #else
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
170 // FIXME: find a "standard" font for UNIX platforms
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
171 #endif
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
172 }
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
173
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174 if (! file.empty () && FT_New_Face (library, file.c_str (), 0, &retval))
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parents: 9406
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175 ::warning ("ft_manager: unable to load font: %s", file.c_str ());
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parents:
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176
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
177 return retval;
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parents:
diff changeset
178 }
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
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179
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
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180 private:
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
181 FT_Library library;
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
182 #if HAVE_FONTCONFIG
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
183 bool fc_init_done;
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
184 #endif
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
185 };
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
186
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
187 ft_manager* ft_manager::instance = 0;
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parents:
diff changeset
188
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
189 // ---------------------------------------------------------------------------
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
190
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
191 ft_render::ft_render (void)
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
192 : text_processor (), face (0), bbox (1, 4, 0.0),
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
193 xoffset (0), yoffset (0), mode (MODE_BBOX),
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
194 red (0), green (0), blue (0)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
195 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
196 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
197
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
198 ft_render::~ft_render (void)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
199 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
200 if (face)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
201 FT_Done_Face (face);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
202 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
203
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
204 void
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
205 ft_render::set_font (const base_properties& props)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
206 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
207 if (face)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
208 FT_Done_Face (face);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
209
4af6e29449c1 [mq]: graphics_text_engine
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parents:
diff changeset
210 // FIXME: take "fontunits" into account
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parents: 9406
diff changeset
211 double font_size = props.get ("fontsize").double_value ();
9403
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parents:
diff changeset
212
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diff changeset
213 face = ft_manager::get_font (props.get ("fontname").string_value (),
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parents: 9406
diff changeset
214 props.get ("fontweight").string_value (),
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parents: 9406
diff changeset
215 props.get ("fontangle").string_value (),
9403
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
216 font_size);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
217
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
218 if (face)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
219 {
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
220 if (FT_Set_Char_Size (face, 0, font_size*64, 0, 0))
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diff changeset
221 ::warning ("ft_render: unable to set font size to %d", font_size);
9403
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
222 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
223 else
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diff changeset
224 ::warning ("ft_render: unable to load appropriate font");
9403
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
225 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
226
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
227 void
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
228 ft_render::set_mode (int m)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
229 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
230 mode = m;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
231
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
232 switch (mode)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
233 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
234 case MODE_BBOX:
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
235 xoffset = yoffset = 0;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
236 bbox = Matrix (1, 4, 0.0);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
237 break;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
238 case MODE_RENDER:
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
239 if (bbox.numel () != 4)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
240 {
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diff changeset
241 ::warning ("ft_render: invalid bounding box, cannot render");
9403
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Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
242
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
243 xoffset = yoffset = 0;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
244 pixels = uint8NDArray ();
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
245 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
246 else
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
247 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
248 pixels = uint8NDArray (dim_vector (4, bbox(2), bbox(3)),
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
249 static_cast<uint8_t> (0));
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
250 xoffset = 0;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
251 yoffset = -bbox(1)-1;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
252 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
253 break;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
254 default:
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
255 ::error ("ft_render: invalid mode `%d'", mode);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
256 break;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
257 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
258 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
259
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
260 void
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
261 ft_render::visit (text_element_string& e)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
262 {
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parents: 9406
diff changeset
263 if (face)
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
264 {
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parents: 9406
diff changeset
265 std::string str = e.string_value ();
2093499ec9f4 avoid crash if default font can't be found
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parents: 9406
diff changeset
266 FT_UInt glyph_index, previous = 0;
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
267
9616
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parents: 9406
diff changeset
268 for (int i = 0; i < str.length (); i++)
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
269 {
9616
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parents: 9406
diff changeset
270 glyph_index = FT_Get_Char_Index (face, str[i]);
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parents: 9406
diff changeset
271
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parents: 9406
diff changeset
272 if (! glyph_index
2093499ec9f4 avoid crash if default font can't be found
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parents: 9406
diff changeset
273 || FT_Load_Glyph (face, glyph_index, FT_LOAD_DEFAULT))
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parents: 9406
diff changeset
274 ::warning ("ft_render: skipping missing glyph for character `%c'",
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
275 str[i]);
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parents: 9406
diff changeset
276 else
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
277 {
9616
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parents: 9406
diff changeset
278 switch (mode)
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
279 {
9616
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parents: 9406
diff changeset
280 case MODE_RENDER:
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parents: 9406
diff changeset
281 if (FT_Render_Glyph (face->glyph, FT_RENDER_MODE_NORMAL))
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parents: 9406
diff changeset
282 ::warning ("ft_render: unable to render glyph for character `%c'",
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
283 str[i]);
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parents: 9406
diff changeset
284 else
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parents: 9406
diff changeset
285 {
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
286 FT_Bitmap& bitmap = face->glyph->bitmap;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
287 int x0, y0;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
288
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
289 if (previous)
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
290 {
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
291 FT_Vector delta;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
292
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
293 FT_Get_Kerning (face, previous, glyph_index, FT_KERNING_DEFAULT, &delta);
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
294 xoffset += (delta.x >> 6);
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
295 }
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
296
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
297 x0 = xoffset+face->glyph->bitmap_left;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
298 y0 = yoffset+face->glyph->bitmap_top;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
299 for (int r = 0; r < bitmap.rows; r++)
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
300 for (int c = 0; c < bitmap.width; c++)
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
301 {
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
302 unsigned char pix = bitmap.buffer[r*bitmap.width+c];
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
303 if (x0+c < 0 || x0+c >= pixels.dim2()
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
304 || y0-r < 0 || y0-r >= pixels.dim3())
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
305 {
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
306 //::error ("out-of-bound indexing!!");
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
307 }
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
308 else if (pixels(3, x0+c, y0-r).value () == 0)
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
309 {
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
310 pixels(0, x0+c, y0-r) = red;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
311 pixels(1, x0+c, y0-r) = green;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
312 pixels(2, x0+c, y0-r) = blue;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
313 pixels(3, x0+c, y0-r) = pix;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
314 }
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
315 }
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
316
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
317 xoffset += (face->glyph->advance.x >> 6);
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
318 }
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
319 break;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
320
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
321 case MODE_BBOX:
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
322 // width
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
323 if (previous)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
324 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
325 FT_Vector delta;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
326
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
327 FT_Get_Kerning (face, previous, glyph_index, FT_KERNING_DEFAULT, &delta);
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
328 bbox(2) += (delta.x >> 6);
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
329 }
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
330 bbox(2) += (face->glyph->advance.x >> 6);
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
331
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
332 int asc, desc;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
333
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
334 if (false /*tight*/)
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
335 {
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
336 desc = face->glyph->metrics.horiBearingY - face->glyph->metrics.height;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
337 asc = face->glyph->metrics.horiBearingY;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
338 }
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
339 else
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
340 {
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
341 asc = face->size->metrics.ascender;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
342 desc = face->size->metrics.descender;
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
343 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
344
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
345 asc = yoffset + (asc >> 6);
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
346 desc = yoffset + (desc >> 6);
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
347
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
348 if (desc < bbox(1))
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
349 {
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
350 bbox(3) += (bbox(1) - desc);
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
351 bbox(1) = desc;
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
352 }
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
353 if (asc > (bbox(3)+bbox(1)))
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
354 bbox(3) = asc-bbox(1);
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
355 break;
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
356 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
357
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
358 previous = glyph_index;
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
359 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
360 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
361 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
362 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
363
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
364 void
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
365 ft_render::reset (void)
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 set_mode (MODE_BBOX);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
368 set_color (Matrix (1, 3, 0.0));
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
369 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
370
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
371 void
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
372 ft_render::set_color (Matrix c)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
373 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
374 if (c.numel () == 3)
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 red = static_cast<uint8_t> (c(0)*255);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
377 green = static_cast<uint8_t> (c(1)*255);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
378 blue = static_cast<uint8_t> (c(2)*255);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
379 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
380 else
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
381 ::warning ("ft_render::set_color: invalid color");
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
382 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
383
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
384 uint8NDArray
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
385 ft_render::render (text_element* elt, Matrix& box, int rotation)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
386 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
387 set_mode (MODE_BBOX);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
388 elt->accept (*this);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
389 box = bbox;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
390
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
391 set_mode (MODE_RENDER);
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
392 if (pixels.numel () > 0)
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
393 {
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
394 elt->accept (*this);
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
395
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
396 switch (rotation)
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
397 {
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
398 case ROTATION_0:
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
399 break;
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
400 case ROTATION_90:
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
401 {
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
402 Array<octave_idx_type> perm (3);
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
403 perm(0) = 0;
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
404 perm(1) = 2;
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
405 perm(2) = 1;
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
406 pixels = pixels.permute (perm);
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
407
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
408 Array<idx_vector> idx (3);
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
409 idx(0) = idx_vector (':');
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
410 idx(1) = idx_vector (pixels.dim2()-1, -1, -1);
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
411 idx(2) = idx_vector (':');
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
412 pixels = uint8NDArray (pixels.index (idx));
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
413 }
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
414 break;
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
415 case ROTATION_180:
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
416 {
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
417 Array<idx_vector> idx (3);
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
418 idx(0) = idx_vector (':');
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
419 idx(1) = idx_vector (pixels.dim2()-1, -1, -1);
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
420 idx(2)= idx_vector (pixels.dim3()-1, -1, -1);
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
421 pixels = uint8NDArray (pixels.index (idx));
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
422 }
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
423 break;
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
424 case ROTATION_270:
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
425 {
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
426 Array<octave_idx_type> perm (3);
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
427 perm(0) = 0;
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
428 perm(1) = 2;
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
429 perm(2) = 1;
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
430 pixels = pixels.permute (perm);
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
431
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
432 Array<idx_vector> idx (3);
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
433 idx(0) = idx_vector (':');
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
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434 idx(1) = idx_vector (':');
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
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435 idx(2) = idx_vector (pixels.dim3()-1, -1, -1);
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
436 pixels = uint8NDArray (pixels.index (idx));
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
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437 }
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
438 break;
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
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439 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
440 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
441
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
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442 return pixels;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
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443 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
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444
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
445 #endif // HAVE_FREETYPE