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annotate libinterp/corefcn/txt-eng-ft.cc @ 17327:fe6518a1d87c

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Move TeX symbol decoding into the lexer (bug #39831). * libinterp/Makefile.am (BUILT_SOURCES): Add corefcn/oct-tex-symbols.cc. (BUILT_DISTFILES): Add corefcn/oct-tex-lexer.ll and corefcn/oct-tex-symbols.cc. (EXTRA_DIST): Add corefcn/oct-tex-lexer.in.ll and corefcn/oct-tex-symbols.in. (ULT_DIST_SRC): Filter out corefcn/oct-tex-lexer.ll from DIST_SRC and add corefcn/oct-tex-lexer.in.ll instead. (CLEAN_FILES): Add corefcn/oct-tex-parser.output. * libinterp/corefcn/modules.mk (corefcn/oct-tex-lexer.ll, corefcn/oct-tex-symbols.cc): New rules to build the TeX lexer. (corefcn/txt-eng.cc): Add dependency on corefcn/oct-tex-symbols.cc. * libinterp/corefcn/oct-tex-lexer.in.ll: Renamed from oct-tex.lexer.ll. Remove COMMAND state. Remove ID regex. Replace rules for symbols with tag @SYMBOL_RULES@. * libinterp/corefcn/oct-tex-parser.yy (ID, CMD, identifier): Remove tokens. (SYM, sym): New token and value. (symbol_element): Build from SYM. * libinterp/corefcn/oct-tex-symbols.in: New file with supported TeX symbols and corresponding codes (unicode and MS symbols). * libinterp/corefcn/txt-eng.h (class text_element_symbol): Make it inherit from text_element. (text_element_symbol::code): Removed member. (text_element_symbol::symbol): New member. (text_element_symbol::text_element_symbol): Adapt constructor. (text_element_symbol::get_symbol): New method. (text_element_symbol::get_symbol_code): Make const. * libinterp/corefcn/txt-eng.cc (symbol_names, symbol_codes): Remove static variables, now auto-generated from oct-tex-symbols.in. (oct-tex-symbols.cc): New include. (text_element_symbol::get_symbol_code): Change implementation to simply index into auto-generated symbol_codes array. * libinterp/corefcn/txt-eng-ft.cc (ft_render::visit(text_element_symbol)): Don't use text_element_symbol::string_value(), use text_element_symbol::get_symbol() instead.
author Michael Goffioul <michael.goffioul@gmail.com>
date Sat, 24 Aug 2013 14:27:09 -0400
parents c8809de193a3
children 219552139c18
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1 /*
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2
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3 Copyright (C) 2009-2012 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 defined (HAVE_FREETYPE)
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28
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29 #if defined (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 #include <map>
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35 #include <utility>
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36
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37 #include "singleton-cleanup.h"
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38
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39 #include "error.h"
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40 #include "pr-output.h"
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41 #include "txt-eng-ft.h"
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42
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43 // FIXME -- maybe issue at most one warning per glyph/font/size/weight
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44 // combination.
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45
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46 static void
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47 gripe_missing_glyph (FT_ULong c)
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48 {
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49 warning_with_id ("Octave:missing-glyph",
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50 "ft_render: skipping missing glyph for character '%x'",
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51 c);
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52 }
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53
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54 static void
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55 gripe_glyph_render (FT_ULong c)
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56 {
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57 warning_with_id ("Octave:glyph-render",
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58 "ft_render: unable to render glyph for character '%x'",
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59 c);
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60 }
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61
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62 #ifdef _MSC_VER
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63 // This is just a trick to avoid multiply symbols definition.
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64 // PermMatrix.h contains a dllexport'ed Array<octave_idx_type>
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65 // that will make MSVC not to generate new instantiation and
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66 // use the imported one.
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67 #include "PermMatrix.h"
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68 #endif
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69
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70 // Forward declaration
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71 static void ft_face_destroyed (void* object);
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72
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73 class
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74 ft_manager
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75 {
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76 public:
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77 static bool instance_ok (void)
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78 {
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79 bool retval = true;
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80
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81 if (! instance)
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82 {
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83 instance = new ft_manager ();
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84
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85 if (instance)
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86 singleton_cleanup_list::add (cleanup_instance);
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87 }
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88
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89 if (! instance)
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90 {
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91 ::error ("unable to create ft_manager!");
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92
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93 retval = false;
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94 }
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95
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96 return retval;
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97 }
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98
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99 static void cleanup_instance (void) { delete instance; instance = 0; }
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100
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101 static FT_Face get_font (const std::string& name, const std::string& weight,
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102 const std::string& angle, double size)
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103 { return (instance_ok ()
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104 ? instance->do_get_font (name, weight, angle, size)
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105 : 0); }
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106
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107 static void font_destroyed (FT_Face face)
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108 {
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109 if (instance_ok ())
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110 instance->do_font_destroyed (face);
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111 }
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112
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113 private:
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114
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115 static ft_manager *instance;
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116
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117 typedef std::pair<std::string, double> ft_key;
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118 typedef std::map<ft_key, FT_Face> ft_cache;
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119
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120 // Cache the fonts loaded by freetype. This cache only contains
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121 // weak references to the fonts, strong references are only present
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122 // in class ft_render.
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123 ft_cache cache;
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124
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125 private:
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126
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127 // No copying!
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128
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129 ft_manager (const ft_manager&);
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130
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131 ft_manager& operator = (const ft_manager&);
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132
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133 ft_manager (void)
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134 : library (), freetype_initialized (false), fontconfig_initialized (false)
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135 {
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136 if (FT_Init_FreeType (&library))
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137 ::error ("unable to initialize freetype library");
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138 else
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139 freetype_initialized = true;
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140
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141 #if defined (HAVE_FONTCONFIG)
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142 if (! FcInit ())
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143 ::error ("unable to initialize fontconfig library");
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144 else
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145 fontconfig_initialized = true;
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146 #endif
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147 }
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148
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149 ~ft_manager (void)
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150 {
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151 if (freetype_initialized)
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152 FT_Done_FreeType (library);
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153
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154 #if defined (HAVE_FONTCONFIG)
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155 // FIXME -- Skip the call to FcFini because it can trigger the
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156 // assertion
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157 //
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158 // octave: fccache.c:507: FcCacheFini: Assertion 'fcCacheChains[i] == ((void *)0)' failed.
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159 //
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160 // if (fontconfig_initialized)
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161 // FcFini ();
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162 #endif
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163 }
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164
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165
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166 FT_Face do_get_font (const std::string& name, const std::string& weight,
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167 const std::string& angle, double size)
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168 {
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169 FT_Face retval = 0;
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170
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171 // Look first into the font cache, then use fontconfig. If the font
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172 // is present in the cache, simply add a reference and return it.
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173
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174 ft_key key (name + ":" + weight + ":" + angle, size);
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175 ft_cache::const_iterator it = cache.find (key);
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176
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177 if (it != cache.end ())
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178 {
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179 FT_Reference_Face (it->second);
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180 return it->second;
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181 }
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182
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183 std::string file;
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184
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185 #if defined (HAVE_FONTCONFIG)
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186 if (fontconfig_initialized)
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187 {
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188 int fc_weight, fc_angle;
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189
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190 if (weight == "bold")
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191 fc_weight = FC_WEIGHT_BOLD;
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192 else if (weight == "light")
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193 fc_weight = FC_WEIGHT_LIGHT;
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194 else if (weight == "demi")
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195 fc_weight = FC_WEIGHT_DEMIBOLD;
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196 else
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197 fc_weight = FC_WEIGHT_NORMAL;
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198
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199 if (angle == "italic")
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200 fc_angle = FC_SLANT_ITALIC;
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201 else if (angle == "oblique")
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202 fc_angle = FC_SLANT_OBLIQUE;
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203 else
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204 fc_angle = FC_SLANT_ROMAN;
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205
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206 FcPattern *pat = FcPatternCreate ();
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207
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208 FcPatternAddString (pat, FC_FAMILY,
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209 (reinterpret_cast<const FcChar8*>
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210 (name == "*" ? "sans" : name.c_str ())));
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211
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212 FcPatternAddInteger (pat, FC_WEIGHT, fc_weight);
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213 FcPatternAddInteger (pat, FC_SLANT, fc_angle);
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214 FcPatternAddDouble (pat, FC_PIXEL_SIZE, size);
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215
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216 if (FcConfigSubstitute (0, pat, FcMatchPattern))
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217 {
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218 FcResult res;
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219 FcPattern *match;
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220
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221 FcDefaultSubstitute (pat);
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222 match = FcFontMatch (0, pat, &res);
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223
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224 // FIXME -- originally, this test also required that
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225 // res != FcResultNoMatch. Is that really needed?
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226 if (match)
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227 {
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228 unsigned char *tmp;
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229
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230 FcPatternGetString (match, FC_FILE, 0, &tmp);
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231 file = reinterpret_cast<char*> (tmp);
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232 }
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233 else
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234 ::warning ("could not match any font: %s-%s-%s-%g",
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235 name.c_str (), weight.c_str (), angle.c_str (),
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236 size);
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237
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238 if (match)
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239 FcPatternDestroy (match);
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240 }
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241
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242 FcPatternDestroy (pat);
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243 }
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244 #endif
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245
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246 if (file.empty ())
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247 {
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248 #ifdef __WIN32__
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249 file = "C:/WINDOWS/Fonts/verdana.ttf";
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250 #else
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251 // FIXME: find a "standard" font for UNIX platforms
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252 #endif
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253 }
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254
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255 if (! file.empty ())
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256 {
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257 if (FT_New_Face (library, file.c_str (), 0, &retval))
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258 ::warning ("ft_manager: unable to load font: %s", file.c_str ());
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259 else
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260 {
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261 // Install a finalizer to notify ft_manager that the font is
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262 // being destroyed. The class ft_manager only keeps weak
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263 // references to font objects.
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264
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265 retval->generic.data = new ft_key (key);
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266 retval->generic.finalizer = ft_face_destroyed;
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267
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268 // Insert loaded font into the cache.
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269
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270 cache[key] = retval;
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271 }
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272 }
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273
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274 return retval;
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275 }
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276
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277 void do_font_destroyed (FT_Face face)
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278 {
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279 if (face->generic.data)
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280 {
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281 ft_key* pkey =
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282 reinterpret_cast<ft_key*> (face->generic.data);
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283
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284 cache.erase (*pkey);
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285 delete pkey;
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286 face->generic.data = 0;
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287 }
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288 }
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289
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290 private:
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291 FT_Library library;
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292 bool freetype_initialized;
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293 bool fontconfig_initialized;
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294 };
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295
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296 ft_manager* ft_manager::instance = 0;
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297
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298 static void
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299 ft_face_destroyed (void* object)
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300 { ft_manager::font_destroyed (reinterpret_cast<FT_Face> (object)); }
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301
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302 // ---------------------------------------------------------------------------
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303
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304 ft_render::ft_render (void)
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305 : text_processor (), font (), bbox (1, 4, 0.0), halign (0), xoffset (0),
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306 line_yoffset (0), yoffset (0), mode (MODE_BBOX),
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307 color (dim_vector (1, 3), 0)
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308 {
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309 }
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310
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311 ft_render::~ft_render (void)
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312 {
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313 }
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314
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315 void
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316 ft_render::set_font (const std::string& name, const std::string& weight,
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317 const std::string& angle, double size)
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318 {
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319 // FIXME: take "fontunits" into account
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320 FT_Face face = ft_manager::get_font (name, weight, angle, size);
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321
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322 if (face)
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323 {
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diff changeset
324 if (FT_Set_Char_Size (face, 0, size*64, 0, 0))
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325 ::warning ("ft_render: unable to set font size to %g", size);
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326
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327 font = ft_font (name, weight, angle, size, face);
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328 }
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329 else
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2093499ec9f4 avoid crash if default font can't be found
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330 ::warning ("ft_render: unable to load appropriate font");
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331 }
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332
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333 void
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334 ft_render::push_new_line (void)
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335 {
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336 switch (mode)
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337 {
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338 case MODE_BBOX:
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339 {
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340 // Create a new bbox entry based on the current font.
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341
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342 FT_Face face = font.face;
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343
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344 if (face)
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345 {
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346 int asc = face->size->metrics.ascender >> 6;
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347 int desc = face->size->metrics.descender >> 6;
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348 int h = face->size->metrics.height >> 6;
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349
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350 Matrix bb (1, 5, 0.0);
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diff changeset
351
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diff changeset
352 bb(1) = desc;
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353 bb(3) = asc - desc;
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354 bb(4) = h;
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diff changeset
355
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diff changeset
356 line_bbox.push_back (bb);
17274
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
357
0a09d4b40767 Combine successive TeX super- and subscript elements.
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diff changeset
358 xoffset = yoffset = 0;
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359 }
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parents: 17270
diff changeset
360 }
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parents: 17270
diff changeset
361 break;
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parents: 17270
diff changeset
362
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diff changeset
363 case MODE_RENDER:
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Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
364 {
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diff changeset
365 // Move to the next line bbox, adjust xoffset based on alignment
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parents: 17270
diff changeset
366 // and yoffset based on the old and new line bbox.
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diff changeset
367
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diff changeset
368 Matrix old_bbox = line_bbox.front ();
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diff changeset
369 line_bbox.pop_front ();
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diff changeset
370 Matrix new_bbox = line_bbox.front ();
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diff changeset
371
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diff changeset
372 xoffset = compute_line_xoffset (new_bbox);
17272
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diff changeset
373 line_yoffset += (old_bbox(1) - (new_bbox(1) + new_bbox(3)));
8ce6cdd272eb Support TeX elements in FreeType renderer.
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diff changeset
374 yoffset = 0;
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diff changeset
375 }
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parents: 17270
diff changeset
376 break;
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diff changeset
377 }
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parents: 17270
diff changeset
378 }
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parents: 17270
diff changeset
379
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Michael Goffioul <michael.goffioul@gmail.com>
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diff changeset
380 int
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diff changeset
381 ft_render::compute_line_xoffset (const Matrix& lb) const
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Michael Goffioul <michael.goffioul@gmail.com>
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diff changeset
382 {
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parents: 17270
diff changeset
383 if (! bbox.is_empty ())
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parents: 17270
diff changeset
384 {
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Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
385 switch (halign)
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Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
386 {
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Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
387 case 0:
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388 return 0;
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diff changeset
389 case 1:
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390 return (bbox(2) - lb(2)) / 2;
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diff changeset
391 case 2:
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392 return (bbox(2) - lb(2));
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393 }
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394 }
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Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
395
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396 return 0;
cb7233cfbf43 Prepare base text rendering code for full TeX support.
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diff changeset
397 }
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Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
398
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Michael Goffioul <michael.goffioul@gmail.com>
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diff changeset
399 void
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Michael Goffioul <michael.goffioul@gmail.com>
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diff changeset
400 ft_render::compute_bbox (void)
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Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
401 {
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Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
402 // Stack the various line bbox together and compute the final
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
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diff changeset
403 // bounding box for the entire text string.
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
404
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
405 bbox = Matrix ();
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
406
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
407 switch (line_bbox.size ())
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
408 {
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
409 case 0:
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
410 break;
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
411 case 1:
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
412 bbox = line_bbox.front ().extract (0, 0, 0, 3);
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
413 break;
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
414 default:
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
415 for (std::list<Matrix>::const_iterator it = line_bbox.begin ();
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
416 it != line_bbox.end (); ++it)
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
417 {
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
418 if (bbox.is_empty ())
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
419 bbox = it->extract (0, 0, 0, 3);
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
420 else
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
421 {
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
422 bbox(1) -= (*it)(3);
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
423 bbox(3) += (*it)(3);
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
424 bbox(2) = xmax (bbox(2), (*it)(2));
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
425 }
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
426 }
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
427 break;
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
428 }
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
429 }
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
430
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
431 void
17272
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
432 ft_render::update_line_bbox (void)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
433 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
434 // Called after a font change, when in MODE_BBOX mode, to update the
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
435 // current line bbox with the new font metrics. This also includes the
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
436 // current yoffset, that is the offset of the current glyph's baseline
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
437 // the line's baseline.
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
438
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
439 if (mode == MODE_BBOX)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
440 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
441 int asc = font.face->size->metrics.ascender >> 6;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
442 int desc = font.face->size->metrics.descender >> 6;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
443
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
444 Matrix& bb = line_bbox.front ();
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
445
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
446 if ((yoffset + desc) < bb(1))
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
447 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
448 // The new font goes below the bottom of the current bbox.
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
449
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
450 int delta = bb(1) - (yoffset + desc);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
451
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
452 bb(1) -= delta;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
453 bb(3) += delta;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
454 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
455
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
456 if ((yoffset + asc) > (bb(1) + bb(3)))
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
457 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
458 // The new font goes above the top of the current bbox.
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
459
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
460 int delta = (yoffset + asc) - (bb(1) + bb(3));
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
461
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
462 bb(3) += delta;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
463 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
464 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
465 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
466
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
467 void
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
468 ft_render::set_mode (int m)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
469 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
470 mode = m;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
471
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
472 switch (mode)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
473 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
474 case MODE_BBOX:
17272
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
475 xoffset = line_yoffset = yoffset = 0;
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
476 bbox = Matrix (1, 4, 0.0);
17271
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
477 line_bbox.clear ();
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
478 push_new_line ();
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
479 break;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
480 case MODE_RENDER:
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
481 if (bbox.numel () != 4)
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
482 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
483 ::warning ("ft_render: invalid bounding box, cannot render");
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
484
17272
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
485 xoffset = line_yoffset = yoffset = 0;
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
486 pixels = uint8NDArray ();
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
487 }
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
488 else
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
489 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
490 pixels = uint8NDArray (dim_vector (4, bbox(2), bbox(3)),
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
491 static_cast<uint8_t> (0));
17271
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
492 xoffset = compute_line_xoffset (line_bbox.front ());
17272
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
493 line_yoffset = -bbox(1)-1;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
494 yoffset = 0;
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
495 }
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
496 break;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
497 default:
15466
d174210ce1ec use ' instead of ` in error messages, warnings and most comments
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
498 ::error ("ft_render: invalid mode '%d'", mode);
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
499 break;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
500 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
501 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
502
17272
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
503 FT_UInt
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
504 ft_render::process_character (FT_ULong code, FT_UInt previous)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
505 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
506 FT_Face face = font.face;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
507 FT_UInt glyph_index = 0;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
508
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
509 if (face)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
510 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
511 glyph_index = FT_Get_Char_Index (face, code);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
512
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
513 if (code != '\n'
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
514 && (! glyph_index
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
515 || FT_Load_Glyph (face, glyph_index, FT_LOAD_DEFAULT)))
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
516 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
517 glyph_index = 0;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
518 gripe_missing_glyph (code);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
519 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
520 else
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
521 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
522 switch (mode)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
523 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
524 case MODE_RENDER:
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
525 if (code == '\n')
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
526 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
527 glyph_index = FT_Get_Char_Index (face, ' ');
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
528 if (!glyph_index || FT_Load_Glyph (face, glyph_index, FT_LOAD_DEFAULT))
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
529 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
530 glyph_index = 0;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
531 gripe_missing_glyph (' ');
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
532 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
533 else
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
534 push_new_line ();
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
535 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
536 else if (FT_Render_Glyph (face->glyph, FT_RENDER_MODE_NORMAL))
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
537 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
538 glyph_index = 0;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
539 gripe_glyph_render (code);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
540 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
541 else
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
542 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
543 FT_Bitmap& bitmap = face->glyph->bitmap;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
544 int x0, y0;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
545
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
546 if (previous)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
547 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
548 FT_Vector delta;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
549
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
550 FT_Get_Kerning (face, previous, glyph_index, FT_KERNING_DEFAULT, &delta);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
551 xoffset += (delta.x >> 6);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
552 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
553
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
554 x0 = xoffset + face->glyph->bitmap_left;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
555 y0 = line_yoffset + yoffset + face->glyph->bitmap_top;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
556
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
557 // 'w' seems to have a negative -1
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
558 // face->glyph->bitmap_left, this is so we don't
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
559 // index out of bound, and assumes we we allocated
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
560 // the right amount of horizontal space in the bbox.
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
561 if (x0 < 0)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
562 x0 = 0;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
563
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
564 for (int r = 0; r < bitmap.rows; r++)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
565 for (int c = 0; c < bitmap.width; c++)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
566 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
567 unsigned char pix = bitmap.buffer[r*bitmap.width+c];
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
568 if (x0+c < 0 || x0+c >= pixels.dim2 ()
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
569 || y0-r < 0 || y0-r >= pixels.dim3 ())
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
570 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
571 //::warning ("ft_render: pixel out of bound (char=%d, (x,y)=(%d,%d), (w,h)=(%d,%d)",
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
572 // str[i], x0+c, y0-r, pixels.dim2 (), pixels.dim3 ());
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
573 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
574 else if (pixels(3, x0+c, y0-r).value () == 0)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
575 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
576 pixels(0, x0+c, y0-r) = color(0);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
577 pixels(1, x0+c, y0-r) = color(1);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
578 pixels(2, x0+c, y0-r) = color(2);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
579 pixels(3, x0+c, y0-r) = pix;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
580 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
581 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
582
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
583 xoffset += (face->glyph->advance.x >> 6);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
584 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
585 break;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
586
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
587 case MODE_BBOX:
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
588 if (code == '\n')
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
589 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
590 glyph_index = FT_Get_Char_Index (face, ' ');
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
591 if (! glyph_index
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
592 || FT_Load_Glyph (face, glyph_index, FT_LOAD_DEFAULT))
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
593 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
594 glyph_index = 0;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
595 gripe_missing_glyph (' ');
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
596 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
597 else
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
598 push_new_line ();
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
599 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
600 else
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
601 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
602 Matrix& bb = line_bbox.back ();
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
603
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
604 // If we have a previous glyph, use kerning information.
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
605 // This usually means moving a bit backward before adding
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
606 // the next glyph. That is, "delta.x" is usually < 0.
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
607 if (previous)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
608 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
609 FT_Vector delta;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
610
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
611 FT_Get_Kerning (face, previous, glyph_index,
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
612 FT_KERNING_DEFAULT, &delta);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
613
17274
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
614 xoffset += (delta.x >> 6);
17272
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
615 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
616
17274
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
617 // Extend current X offset box by the width of the current
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
618 // glyph. Then extend the line bounding box if necessary.
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
619
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
620 xoffset += (face->glyph->advance.x >> 6);
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
621 bb(2) = xmax (bb(2), xoffset);
17272
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
622 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
623 break;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
624 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
625 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
626 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
627
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
628 return glyph_index;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
629 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
630
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
631 void
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
632 ft_render::visit (text_element_string& e)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
633 {
17272
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
634 if (font.is_valid ())
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
635 {
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
636 std::string str = e.string_value ();
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
637 FT_UInt glyph_index, previous = 0;
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
638
10553
f88e3d5d88e2 avoid GCC warnings
John W. Eaton <jwe@octave.org>
parents: 10402
diff changeset
639 for (size_t i = 0; i < str.length (); i++)
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
640 {
17324
c8809de193a3 Handle 8-bits characters correctly in freetype renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17274
diff changeset
641 glyph_index = process_character (static_cast<unsigned char> (str[i]),
c8809de193a3 Handle 8-bits characters correctly in freetype renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17274
diff changeset
642 previous);
12965
22bc9ec80c2c allow multi-line string property for text objects using cell arrays or char matrices
Ben Abbott <bpabbott@mac.com>
parents: 12334
diff changeset
643
17272
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
644 if (str[i] == '\n')
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
645 previous = 0;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
646 else
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
647 previous = glyph_index;
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
648 }
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
649 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
650 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
651
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
652 void
17272
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
653 ft_render::visit (text_element_list& e)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
654 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
655 // Save and restore (after processing the list) the current font and color.
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
656
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
657 ft_font saved_font (font);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
658 uint8NDArray saved_color (color);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
659
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
660 text_processor::visit (e);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
661
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
662 font = saved_font;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
663 color = saved_color;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
664 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
665
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
666 void
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
667 ft_render::visit (text_element_subscript& e)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
668 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
669 ft_font saved_font (font);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
670 int saved_line_yoffset = line_yoffset;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
671 int saved_yoffset = yoffset;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
672
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
673 set_font (font.name, font.weight, font.angle, font.size - 2);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
674 if (font.is_valid ())
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
675 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
676 int h = font.face->size->metrics.height >> 6;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
677
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
678 // Shifting the baseline by 2/3 the font height seems to produce
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
679 // decent result.
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
680 yoffset -= (h * 2) / 3;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
681
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
682 if (mode == MODE_BBOX)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
683 update_line_bbox ();
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
684 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
685
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
686 text_processor::visit (e);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
687
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
688 font = saved_font;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
689 // If line_yoffset changed, this means we moved to a new line; hence yoffset
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
690 // cannot be restored, because the saved value is not relevant anymore.
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
691 if (line_yoffset == saved_line_yoffset)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
692 yoffset = saved_yoffset;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
693 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
694
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
695 void
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
696 ft_render::visit (text_element_superscript& e)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
697 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
698 ft_font saved_font (font);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
699 int saved_line_yoffset = line_yoffset;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
700 int saved_yoffset = yoffset;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
701
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
702 set_font (font.name, font.weight, font.angle, font.size - 2);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
703 if (saved_font.is_valid () && font.is_valid ())
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
704 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
705 int s_asc = saved_font.face->size->metrics.ascender >> 6;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
706
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
707 // Shifting the baseline by 2/3 base font ascender seems to produce
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
708 // decent result.
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
709 yoffset += (s_asc * 2) / 3;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
710
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
711 if (mode == MODE_BBOX)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
712 update_line_bbox ();
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
713 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
714
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
715 text_processor::visit (e);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
716
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
717 font = saved_font;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
718 // If line_yoffset changed, this means we moved to a new line; hence yoffset
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
719 // cannot be restored, because the saved value is not relevant anymore.
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
720 if (line_yoffset == saved_line_yoffset)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
721 yoffset = saved_yoffset;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
722 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
723
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
724 void
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
725 ft_render::visit (text_element_color& e)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
726 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
727 if (mode == MODE_RENDER)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
728 set_color (e.get_color ());
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
729 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
730
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
731 void
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
732 ft_render::visit (text_element_fontsize& e)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
733 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
734 double sz = e.get_fontsize ();
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
735
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
736 // FIXME: Matlab documentation says that the font size is expressed
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
737 // in the text object FontUnit.
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
738
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
739 set_font (font.name, font.weight, font.angle, sz);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
740
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
741 if (mode == MODE_BBOX)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
742 update_line_bbox ();
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
743 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
744
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
745 void
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
746 ft_render::visit (text_element_fontname& e)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
747 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
748 set_font (e.get_fontname (), font.weight, font.angle, font.size);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
749
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
750 if (mode == MODE_BBOX)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
751 update_line_bbox ();
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
752 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
753
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
754 void
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
755 ft_render::visit (text_element_fontstyle& e)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
756 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
757 switch (e.get_fontstyle ())
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
758 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
759 case text_element_fontstyle::normal:
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
760 set_font (font.name, "normal", "normal", font.size);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
761 break;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
762 case text_element_fontstyle::bold:
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
763 set_font (font.name, "bold", "normal", font.size);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
764 break;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
765 case text_element_fontstyle::italic:
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
766 set_font (font.name, "normal", "italic", font.size);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
767 break;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
768 case text_element_fontstyle::oblique:
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
769 set_font (font.name, "normal", "oblique", font.size);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
770 break;
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
771 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
772
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
773 if (mode == MODE_BBOX)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
774 update_line_bbox ();
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
775 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
776
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
777 void
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
778 ft_render::visit (text_element_symbol& e)
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
779 {
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
780 uint32_t code = e.get_symbol_code ();
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
781
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
782 if (code != text_element_symbol::invalid_code && font.is_valid ())
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
783 process_character (code);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
784 else if (font.is_valid ())
17327
fe6518a1d87c Move TeX symbol decoding into the lexer (bug #39831).
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17324
diff changeset
785 ::warning ("ignoring unknown symbol: %d", e.get_symbol ());
17272
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
786 }
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
787
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
788 void
17274
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
789 ft_render::visit (text_element_combined& e)
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
790 {
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
791 int saved_xoffset = xoffset;
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
792 int max_xoffset = xoffset;
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
793
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
794 for (text_element_combined::iterator it = e.begin (); it != e.end (); ++it)
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
795 {
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
796 xoffset = saved_xoffset;
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
797 (*it)->accept (*this);
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
798 max_xoffset = xmax (xoffset, max_xoffset);
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
799 }
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
800
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
801 xoffset = max_xoffset;
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
802 }
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
803
0a09d4b40767 Combine successive TeX super- and subscript elements.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17272
diff changeset
804 void
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
805 ft_render::reset (void)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
806 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
807 set_mode (MODE_BBOX);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
808 set_color (Matrix (1, 3, 0.0));
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
809 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
810
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
811 void
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
812 ft_render::set_color (Matrix c)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
813 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
814 if (c.numel () == 3)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
815 {
17272
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
816 color(0) = static_cast<uint8_t> (c(0)*255);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
817 color(1) = static_cast<uint8_t> (c(1)*255);
8ce6cdd272eb Support TeX elements in FreeType renderer.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17271
diff changeset
818 color(2) = static_cast<uint8_t> (c(2)*255);
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
819 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
820 else
9616
2093499ec9f4 avoid crash if default font can't be found
John W. Eaton <jwe@octave.org>
parents: 9406
diff changeset
821 ::warning ("ft_render::set_color: invalid color");
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
822 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
823
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
824 uint8NDArray
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
825 ft_render::render (text_element* elt, Matrix& box, int rotation)
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
826 {
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
827 set_mode (MODE_BBOX);
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
828 elt->accept (*this);
17271
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
829 compute_bbox ();
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
830 box = bbox;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
831
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
832 set_mode (MODE_RENDER);
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
833 if (pixels.numel () > 0)
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
834 {
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
835 elt->accept (*this);
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
836
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
837 switch (rotation)
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
838 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
839 case ROTATION_0:
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
840 break;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
841 case ROTATION_90:
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
842 {
11570
57632dea2446 attempt better backward compatibility for Array constructors
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
843 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
844 perm(0) = 0;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
845 perm(1) = 2;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
846 perm(2) = 1;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
847 pixels = pixels.permute (perm);
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
848
11570
57632dea2446 attempt better backward compatibility for Array constructors
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
849 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
850 idx(0) = idx_vector (':');
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
851 idx(1) = idx_vector (pixels.dim2 ()-1, -1, -1);
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
852 idx(2) = idx_vector (':');
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
853 pixels = uint8NDArray (pixels.index (idx));
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
854 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
855 break;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
856 case ROTATION_180:
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
857 {
11570
57632dea2446 attempt better backward compatibility for Array constructors
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
858 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
859 idx(0) = idx_vector (':');
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
860 idx(1) = idx_vector (pixels.dim2 ()-1, -1, -1);
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
861 idx(2)= idx_vector (pixels.dim3 ()-1, -1, -1);
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
862 pixels = uint8NDArray (pixels.index (idx));
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
863 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
864 break;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
865 case ROTATION_270:
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
866 {
11570
57632dea2446 attempt better backward compatibility for Array constructors
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
867 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
868 perm(0) = 0;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
869 perm(1) = 2;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
870 perm(2) = 1;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
871 pixels = pixels.permute (perm);
9406
c0c23dbbade7 Improve error handling in text rendering.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 9405
diff changeset
872
11570
57632dea2446 attempt better backward compatibility for Array constructors
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
873 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
874 idx(0) = idx_vector (':');
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
875 idx(1) = idx_vector (':');
14846
460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
876 idx(2) = idx_vector (pixels.dim3 ()-1, -1, -1);
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
877 pixels = uint8NDArray (pixels.index (idx));
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
878 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
879 break;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 9833
diff changeset
880 }
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
881 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
882
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
883 return pixels;
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
884 }
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
885
16201
2338a92e9782 Fix spacing between ylabel and y-axis (bug #38461)
Rik <rik@octave.org>
parents: 15467
diff changeset
886 // Note:
2338a92e9782 Fix spacing between ylabel and y-axis (bug #38461)
Rik <rik@octave.org>
parents: 15467
diff changeset
887 // x-extent accurately measures width of glyphs.
2338a92e9782 Fix spacing between ylabel and y-axis (bug #38461)
Rik <rik@octave.org>
parents: 15467
diff changeset
888 // y-extent is overly large because it is measured from baseline-to-baseline.
2338a92e9782 Fix spacing between ylabel and y-axis (bug #38461)
Rik <rik@octave.org>
parents: 15467
diff changeset
889 // Calling routines, such as ylabel, may need to account for this mismatch.
2338a92e9782 Fix spacing between ylabel and y-axis (bug #38461)
Rik <rik@octave.org>
parents: 15467
diff changeset
890
10402
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
891 Matrix
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
892 ft_render::get_extent (text_element *elt, double rotation)
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
893 {
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
894 set_mode (MODE_BBOX);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
895 elt->accept (*this);
17271
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
896 compute_bbox ();
10402
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
897
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
898 Matrix extent (1, 2, 0.0);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
899
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
900 switch (rotation_to_mode (rotation))
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
901 {
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
902 case ROTATION_0:
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
903 case ROTATION_180:
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
904 extent(0) = bbox(2);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
905 extent(1) = bbox(3);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
906 break;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
907 case ROTATION_90:
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
908 case ROTATION_270:
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
909 extent(0) = bbox(3);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
910 extent(1) = bbox(2);
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
911 }
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
912
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
913 return extent;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
914 }
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
915
12334
63dc132a1000 Move axes labels and title positioning to axes::properties
Konstantinos Poulios <logari81@gmail.com>
parents: 12225
diff changeset
916 Matrix
17269
5b088598df1d Add simple TeX parser based on flex/bison.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 16892
diff changeset
917 ft_render::get_extent (const std::string& txt, double rotation,
5b088598df1d Add simple TeX parser based on flex/bison.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 16892
diff changeset
918 const caseless_str& interpreter)
12334
63dc132a1000 Move axes labels and title positioning to axes::properties
Konstantinos Poulios <logari81@gmail.com>
parents: 12225
diff changeset
919 {
17269
5b088598df1d Add simple TeX parser based on flex/bison.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 16892
diff changeset
920 text_element *elt = text_parser::parse (txt, interpreter);
12334
63dc132a1000 Move axes labels and title positioning to axes::properties
Konstantinos Poulios <logari81@gmail.com>
parents: 12225
diff changeset
921 Matrix extent = get_extent (elt, rotation);
63dc132a1000 Move axes labels and title positioning to axes::properties
Konstantinos Poulios <logari81@gmail.com>
parents: 12225
diff changeset
922 delete elt;
13141
e81ddf9cacd5 maint: untabify and remove trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 12969
diff changeset
923
12334
63dc132a1000 Move axes labels and title positioning to axes::properties
Konstantinos Poulios <logari81@gmail.com>
parents: 12225
diff changeset
924 return extent;
63dc132a1000 Move axes labels and title positioning to axes::properties
Konstantinos Poulios <logari81@gmail.com>
parents: 12225
diff changeset
925 }
63dc132a1000 Move axes labels and title positioning to axes::properties
Konstantinos Poulios <logari81@gmail.com>
parents: 12225
diff changeset
926
10402
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
927 int
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
928 ft_render::rotation_to_mode (double rotation) const
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
929 {
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
930 if (rotation == 0.0)
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
931 return ROTATION_0;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
932 else if (rotation == 90.0)
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
933 return ROTATION_90;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
934 else if (rotation == 180.0)
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
935 return ROTATION_180;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
936 else if (rotation == 270.0)
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
937 return ROTATION_270;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
938 else
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
939 return ROTATION_0;
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
940 }
9f2bf537a651 Implement text extent property
Michael Goffioul <michael.goffioul@gmail.com>
parents: 10350
diff changeset
941
11455
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
942 void
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
943 ft_render::text_to_pixels (const std::string& txt,
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
944 uint8NDArray& pixels_, Matrix& box,
17271
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
945 int _halign, int valign, double rotation,
17269
5b088598df1d Add simple TeX parser based on flex/bison.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 16892
diff changeset
946 const caseless_str& interpreter)
11455
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
947 {
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
948 // FIXME: clip "rotation" between 0 and 360
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
949 int rot_mode = rotation_to_mode (rotation);
13141
e81ddf9cacd5 maint: untabify and remove trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 12969
diff changeset
950
17271
cb7233cfbf43 Prepare base text rendering code for full TeX support.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 17270
diff changeset
951 halign = _halign;
11455
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
952
17269
5b088598df1d Add simple TeX parser based on flex/bison.
Michael Goffioul <michael.goffioul@gmail.com>
parents: 16892
diff changeset
953 text_element *elt = text_parser::parse (txt, interpreter);
11455
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
954 pixels_ = render (elt, box, rot_mode);
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
955 delete elt;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
956
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
957 if (pixels_.numel () == 0)
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
958 {
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
959 // nothing to render
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
960 return;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
961 }
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
962
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
963 switch (halign)
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
964 {
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
965 default: box(0) = 0; break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
966 case 1: box(0) = -box(2)/2; break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
967 case 2: box(0) = -box(2); break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
968 }
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
969 switch (valign)
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
970 {
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
971 default: box(1) = 0; break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
972 case 1: box(1) = -box(3)/2; break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
973 case 2: box(1) = -box(3); break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
974 case 3: break;
16206
9ba5c5ed3aeb Add new verticalalignment option 'cap' for OpenGL plotting.
Rik <rik@octave.org>
parents: 16201
diff changeset
975 case 4: box(1) = -box(3)-box(1); break;
11455
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
976 }
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
977
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
978 switch (rot_mode)
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
979 {
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
980 case ROTATION_90:
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
981 std::swap (box(0), box(1));
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
982 std::swap (box(2), box(3));
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
983 box(0) = -box(0)-box(2);
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
984 break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
985 case ROTATION_180:
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
986 box(0) = -box(0)-box(2);
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
987 box(1) = -box(1)-box(3);
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
988 break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
989 case ROTATION_270:
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
990 std::swap (box(0), box(1));
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
991 std::swap (box(2), box(3));
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
992 box(1) = -box(1)-box(3);
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
993 break;
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
994 }
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
995 }
2be9e22796d2 improvements in text-extent calculation
Konstantinos Poulios <logari81@googlemail.com>
parents: 10553
diff changeset
996
9403
4af6e29449c1 [mq]: graphics_text_engine
Michael Goffioul <michael.goffioul@gmail.com>
parents:
diff changeset
997 #endif // HAVE_FREETYPE