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1 /*
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2 * Copyright (c) 2004 Kazunori "jagarl" Ueno
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3 * Copyright (c) 2000, 2001 Yuki Sawada
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4 * All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions
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8 * are met:
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 * 2. Redistributions in binary form must reproduce the above copyright
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12 * notice, this list of conditions and the following disclaimer in the
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13 * documentation and/or other materials provided with the distribution.
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14 * 3. The name of the author may not be used to endorse or promote products
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15 * derived from this software without specific prior written permission.
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16 *
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17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31 #include <string.h>
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32 #include <stdexcept>
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33 #include <string>
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34
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35 using namespace std;
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36
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37 #include "font.h"
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38 #include "font_peer.h"
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39 #include "codeconv.h"
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40
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41 namespace XKFont {
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42
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43 typedef struct _FontLibrary {
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44 FT_Library super;
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45 int ref_count;
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46 char **paths;
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47 int num_paths;
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48 } FontLibrary;
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49
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50 static FontLibrary *library = NULL;
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51
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52 static char *default_paths[] = {
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53 ".",
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54 "/",
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55 "/usr/X11R6/lib/X11/fonts/TrueType",
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56 "/usr/local/share/fonts/TrueType",
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57 "/usr//share/fonts/TrueType",
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58 "/usr//share/fonts/tt",
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59 NULL
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60 };
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61
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62 static void font_library_ft2_add_path(const char *path);
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63 static void font_library_ft2_remove_path(const char *path);
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64 static void font_library_ft2_add_path(const char *path);
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65 static char *font_library_ft2_build_path(const char *base, const char *name);
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66
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67 static int
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68 font_library_ft2_alloc()
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69 {
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70 int i;
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71
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72 if (!library) {
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73 library = (FontLibrary*) calloc(sizeof(FontLibrary), 1);
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74 if (library) {
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75 if (FT_Init_FreeType(&library->super))
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76 goto _1;
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77 fprintf(stderr, "XKFont::font_library_ft2_alloc : FreeType allocated successfully.\n");
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78 for (i = 0; default_paths[i]; i++)
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79 font_library_ft2_add_path(default_paths[i]);
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80 }
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81 }
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82
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83 library->ref_count++;
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84 return 1;
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85
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86 _1:
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87 free(library);
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88 library = NULL;
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89 fprintf(stderr, "XKFont::font_library_ft2_alloc: Couldn't allocate FreeType.\n");
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90 return 0;
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91 }
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92
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93 static void
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94 font_library_ft2_free()
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95 {
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96 int i;
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97
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98 if (!library || library->ref_count <= 0)
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99 return;
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100 if (--library->ref_count == 0) {
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101 FT_Done_FreeType(library->super);
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102 for (i = 0; i < library->num_paths; i++)
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103 free(library->paths[i]);
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104 free(library->paths);
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105 free(library);
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106 library = NULL;
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107 fprintf(stderr, "XKFont::font_library_ft2_free : FreeType done.\n");
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108 }
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109 }
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110
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111 static void
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112 font_library_ft2_add_path(const char *path)
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113 {
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114 library->num_paths++;
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115 if (!library->paths)
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116 library->paths = (char**) malloc(sizeof(char *));
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117 else
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118 library->paths = (char**) realloc( (void*)library->paths,
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119 library->num_paths * sizeof(char *));
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120 library->paths[library->num_paths - 1] = strdup(path);
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121 }
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122
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123 static void
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124 font_library_ft2_remove_path(const char *path)
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125 {
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126 int i, j;
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127
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128 for (i = 0; i < library->num_paths; i++) {
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129 if (!strcmp(path, library->paths[i])) {
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130 library->num_paths--;
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131 for (j = i; j < library->num_paths; j++)
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132 library->paths[j] = library->paths[j + 1];
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133 if (library->num_paths > 0)
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134 library->paths = (char**) realloc(library->paths,
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135 library->num_paths * sizeof(char *));
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136 else {
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137 free(library->paths);
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138 library->paths = NULL;
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139 }
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140 }
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141 }
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142 }
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143
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144 typedef struct _FontEncoding {
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145 FT_UShort platform_id;
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146 FT_Encoding encoding;
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147 FontCodeConverter conv_func;
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148 } FontEncoding;
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149
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150 static FontEncoding encodings[] = {
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151 { 3, (FT_Encoding)ft_encoding_unicode, codeconv_euc_to_unicode },
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152 { 3, (FT_Encoding)ft_encoding_sjis, codeconv_euc_to_sjis },
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153 { 1, (FT_Encoding)ft_encoding_apple_roman, codeconv_euc_to_latin1 },
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154 { (FT_UShort)-1, (FT_Encoding)-1, NULL }
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155 };
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156
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157 static char *
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158 font_library_ft2_build_path(const char *base, const char *name)
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159 {
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160 char *path;
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161 const char *strs[] = { base, "/", name, NULL };
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162 int i = 0;
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163
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164 path = (char*) calloc(sizeof(char), strlen(base) + strlen(name) + 2);
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165 if (path)
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166 while (strs[i])
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167 strcat(path, strs[i++]);
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168
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169 return path;
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170 }
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171
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172 PeerFt2::PeerFt2(const char *name, int index, int hsize, int vsize)
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173 {
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174 int i,j;
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175
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176 font_library_ft2_alloc();
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177
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178 for (i = 0; i < library->num_paths; i++) {
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179 char *path = font_library_ft2_build_path(library->paths[i], name);
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180 if (path) {
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181 if (FT_New_Face(library->super, path, index, &face))
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182 face = NULL;
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183 free(path);
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184 }
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185 if (face)
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186 break;
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187 }
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188
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189 if (!face) {
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190 string err = string("XKFont::PeerFt2::PeerFt : Cannot open font(TrueType) : ")+name;
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191 throw std::invalid_argument(err);
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192 }
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193
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194 conv_func = 0;
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195 for (i=0; encodings[i].conv_func != 0; i++) {
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196 FT_UShort platform_id = encodings[i].platform_id;
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197 FT_Encoding encoding = encodings[i].encoding;
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198 for (j = 0; j < face->num_charmaps; j++) {
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199 FT_CharMap cmap = face->charmaps[j];
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200 if (cmap->platform_id == platform_id && cmap->encoding == encoding) {
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201 if (FT_Set_Charmap(face, cmap) == 0) {
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202 conv_func = encodings[i].conv_func;
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203 break;
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204 }
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205 }
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206 }
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207 if (conv_func) break;
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208 }
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209 if (conv_func == 0) {
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210 FT_Done_Face(face);
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211 fprintf(stderr,"cannot find charmap\n");
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212 string err = string("XKFont::PeerFt2::PeerFt : No supported code converter of font (TrueType) ")+name;
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213 throw std::invalid_argument(err);
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214 }
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215 FT_Set_Pixel_Sizes(face, hsize, vsize);
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216
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217 }
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218
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219 PeerFt2::~PeerFt2() {
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220 FT_Done_Face(face);
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221 font_library_ft2_free();
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222 }
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223
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224 bool
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225 PeerFt2::GlyphCreate(unsigned int code, Glyph* glyph)
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226 {
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227 FT_GlyphSlot slot;
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228 FT_UInt index;
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229 int bmsize;
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230
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231 if (face == 0) return false;
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232 code = conv_func(code);
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233 if (code == 0) return false;
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234 index = FT_Get_Char_Index(face, code);
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235 if (index == 0) return false;
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236
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237 /* Don't consider error */
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238 slot = face->glyph;
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239 if (slot) {
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240 // if (! FT_Load_Glyph(face, index, FT_LOAD_DEFAULT)) {
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241 // BITMAP だと なぜか render してくれない……
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242 // LOAD_DEFAULT でも、下に対応コードを付けたので一応は大丈夫
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243 if (! FT_Load_Glyph(face, index, FT_LOAD_NO_BITMAP)) {
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244 FT_Render_Glyph(slot, ft_render_mode_normal);
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245 }
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246 }
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247
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248 glyph->bitmap_left = slot->bitmap_left;
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249 glyph->bitmap_top = slot->bitmap_top;
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250 glyph->bitmap.width = slot->bitmap.width;
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251 glyph->bitmap.rows = slot->bitmap.rows;
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252
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253 /*
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254 glyph->metrics.ascender = private->face->size->metrics.ascender >> 6;
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255 glyph->metrics.descender = private->face->size->metrics.descender >> 6;
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256 */
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257
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258 glyph->advance.x = slot->advance.x >> 6;
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259 glyph->advance.y = slot->advance.y >> 6;
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260
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261 bmsize = glyph->bitmap.width * glyph->bitmap.rows;
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262 if (bmsize > 0) {
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263 glyph->bitmap.buffer = new unsigned char[bmsize];
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264 memcpy(glyph->bitmap.buffer, slot->bitmap.buffer, bmsize);
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265 }
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266 // なぜか Render したのに MONO なことがある……
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267 /* for freetype < 2.1.3, use ``ft_pixel_mode_mono'' */
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268 if (slot->bitmap.pixel_mode == ft_pixel_mode_mono) {int i,j;
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269 // if (slot->bitmap.pixel_mode == FT_PIXEL_MODE_MONO) {int i,j;
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270 char* d = (char*)slot->bitmap.buffer;
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271 for (i=0; i<glyph->bitmap.rows; i++) {
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272 int flag = *d++; int len = 8;
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273 unsigned char* buf = glyph->bitmap.buffer + i*slot->bitmap.width;
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274 for (j=0; j<glyph->bitmap.width; j++) {
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275 if (len == 0) {
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276 flag = *d++;
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277 len = 8;
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278 }
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279 if (flag & 0x80) *buf++ = 0xff;
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280 else *buf++ = 0;
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281 flag <<= 1;
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282 len--;
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283 }
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284 }
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285 }
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286
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287 return true;
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288
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289 }
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290
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291 } /* end of namespace XKFont */
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292
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