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5172
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/***************************************************************************/
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/* */
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3 |
/* ttload.c */
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4 |
/* */
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5 |
/* Load the basic TrueType tables, i.e., tables that can be either in */
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6 |
/* TTF or OTF fonts (body). */
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7 |
/* */
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/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, */
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/* 2010 by */
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10 |
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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14 |
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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21 |
#include <ft2build.h>
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22 |
#include FT_INTERNAL_DEBUG_H
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23 |
#include FT_INTERNAL_STREAM_H
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24 |
#include FT_TRUETYPE_TAGS_H
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25 |
#include "ttload.h"
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26 |
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27 |
#include "sferrors.h"
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28 |
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/*************************************************************************/
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31 |
/* */
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32 |
/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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33 |
/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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34 |
/* messages during execution. */
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35 |
/* */
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36 |
#undef FT_COMPONENT
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37 |
#define FT_COMPONENT trace_ttload
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38 |
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39 |
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40 |
/*************************************************************************/
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41 |
/* */
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42 |
/* <Function> */
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43 |
/* tt_face_lookup_table */
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44 |
/* */
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45 |
/* <Description> */
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46 |
/* Looks for a TrueType table by name. */
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/* */
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48 |
/* <Input> */
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49 |
/* face :: A face object handle. */
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50 |
/* */
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51 |
/* tag :: The searched tag. */
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52 |
/* */
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53 |
/* <Return> */
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54 |
/* A pointer to the table directory entry. 0 if not found. */
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55 |
/* */
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56 |
FT_LOCAL_DEF( TT_Table )
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57 |
tt_face_lookup_table( TT_Face face,
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58 |
FT_ULong tag )
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59 |
{
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60 |
TT_Table entry;
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61 |
TT_Table limit;
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62 |
#ifdef FT_DEBUG_LEVEL_TRACE
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FT_Bool zero_length = FALSE;
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#endif
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65 |
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66 |
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67 |
FT_TRACE4(( "tt_face_lookup_table: %08p, `%c%c%c%c' -- ",
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face,
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(FT_Char)( tag >> 24 ),
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70 |
(FT_Char)( tag >> 16 ),
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71 |
(FT_Char)( tag >> 8 ),
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72 |
(FT_Char)( tag ) ));
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73 |
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74 |
entry = face->dir_tables;
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75 |
limit = entry + face->num_tables;
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76 |
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77 |
for ( ; entry < limit; entry++ )
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78 |
{
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79 |
/* For compatibility with Windows, we consider */
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/* zero-length tables the same as missing tables. */
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if ( entry->Tag == tag )
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{
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83 |
if ( entry->Length != 0 )
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84 |
{
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85 |
FT_TRACE4(( "found table.\n" ));
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86 |
return entry;
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87 |
}
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88 |
#ifdef FT_DEBUG_LEVEL_TRACE
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zero_length = TRUE;
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90 |
#endif
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91 |
}
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92 |
}
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93 |
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94 |
#ifdef FT_DEBUG_LEVEL_TRACE
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if ( zero_length )
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96 |
FT_TRACE4(( "ignoring empty table\n" ));
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else
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98 |
FT_TRACE4(( "could not find table\n" ));
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99 |
#endif
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return NULL;
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}
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105 |
/*************************************************************************/
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106 |
/* */
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107 |
/* <Function> */
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108 |
/* tt_face_goto_table */
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109 |
/* */
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110 |
/* <Description> */
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111 |
/* Looks for a TrueType table by name, then seek a stream to it. */
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112 |
/* */
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113 |
/* <Input> */
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114 |
/* face :: A face object handle. */
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115 |
/* */
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116 |
/* tag :: The searched tag. */
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117 |
/* */
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118 |
/* stream :: The stream to seek when the table is found. */
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119 |
/* */
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120 |
/* <Output> */
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121 |
/* length :: The length of the table if found, undefined otherwise. */
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122 |
/* */
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123 |
/* <Return> */
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124 |
/* FreeType error code. 0 means success. */
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125 |
/* */
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126 |
FT_LOCAL_DEF( FT_Error )
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127 |
tt_face_goto_table( TT_Face face,
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128 |
FT_ULong tag,
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129 |
FT_Stream stream,
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130 |
FT_ULong* length )
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131 |
{
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132 |
TT_Table table;
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133 |
FT_Error error;
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134 |
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135 |
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136 |
table = tt_face_lookup_table( face, tag );
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137 |
if ( table )
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138 |
{
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139 |
if ( length )
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140 |
*length = table->Length;
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141 |
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142 |
if ( FT_STREAM_SEEK( table->Offset ) )
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143 |
goto Exit;
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144 |
}
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145 |
else
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146 |
error = SFNT_Err_Table_Missing;
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147 |
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148 |
Exit:
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149 |
return error;
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150 |
}
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151 |
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152 |
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153 |
/* Here, we */
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154 |
/* */
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155 |
/* - check that `num_tables' is valid (and adjust it if necessary) */
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156 |
/* */
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157 |
/* - look for a `head' table, check its size, and parse it to check */
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158 |
/* whether its `magic' field is correctly set */
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159 |
/* */
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160 |
/* - errors (except errors returned by stream handling) */
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161 |
/* */
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162 |
/* SFNT_Err_Unknown_File_Format: */
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163 |
/* no table is defined in directory, it is not sfnt-wrapped */
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164 |
/* data */
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165 |
/* SFNT_Err_Table_Missing: */
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166 |
/* table directory is valid, but essential tables */
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167 |
/* (head/bhed/SING) are missing */
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168 |
/* */
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169 |
static FT_Error
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170 |
check_table_dir( SFNT_Header sfnt,
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171 |
FT_Stream stream )
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172 |
{
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173 |
FT_Error error;
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174 |
FT_UShort nn, valid_entries = 0;
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175 |
FT_UInt has_head = 0, has_sing = 0, has_meta = 0;
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176 |
FT_ULong offset = sfnt->offset + 12;
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177 |
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178 |
static const FT_Frame_Field table_dir_entry_fields[] =
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179 |
{
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180 |
#undef FT_STRUCTURE
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181 |
#define FT_STRUCTURE TT_TableRec
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182 |
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183 |
FT_FRAME_START( 16 ),
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184 |
FT_FRAME_ULONG( Tag ),
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185 |
FT_FRAME_ULONG( CheckSum ),
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186 |
FT_FRAME_ULONG( Offset ),
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187 |
FT_FRAME_ULONG( Length ),
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188 |
FT_FRAME_END
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189 |
};
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190 |
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191 |
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192 |
if ( FT_STREAM_SEEK( offset ) )
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193 |
goto Exit;
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194 |
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195 |
for ( nn = 0; nn < sfnt->num_tables; nn++ )
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196 |
{
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197 |
TT_TableRec table;
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198 |
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199 |
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200 |
if ( FT_STREAM_READ_FIELDS( table_dir_entry_fields, &table ) )
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201 |
{
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202 |
nn--;
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203 |
FT_TRACE2(( "check_table_dir:"
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204 |
" can read only %d table%s in font (instead of %d)\n",
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205 |
nn, nn == 1 ? "" : "s", sfnt->num_tables ));
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206 |
sfnt->num_tables = nn;
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207 |
break;
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208 |
}
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209 |
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210 |
/* we ignore invalid tables */
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211 |
if ( table.Offset + table.Length > stream->size )
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212 |
{
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213 |
FT_TRACE2(( "check_table_dir: table entry %d invalid\n", nn ));
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214 |
continue;
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215 |
}
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216 |
else
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217 |
valid_entries++;
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218 |
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219 |
if ( table.Tag == TTAG_head || table.Tag == TTAG_bhed )
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220 |
{
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221 |
FT_UInt32 magic;
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222 |
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223 |
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224 |
#ifndef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
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225 |
if ( table.Tag == TTAG_head )
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226 |
#endif
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227 |
has_head = 1;
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228 |
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|
229 |
/*
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230 |
* The table length should be 0x36, but certain font tools make it
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231 |
* 0x38, so we will just check that it is greater.
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232 |
*
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233 |
* Note that according to the specification, the table must be
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234 |
* padded to 32-bit lengths, but this doesn't apply to the value of
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235 |
* its `Length' field!
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236 |
*
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237 |
*/
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238 |
if ( table.Length < 0x36 )
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239 |
{
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|
240 |
FT_TRACE2(( "check_table_dir: `head' table too small\n" ));
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241 |
error = SFNT_Err_Table_Missing;
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|
242 |
goto Exit;
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|
243 |
}
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244 |
|
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|
245 |
if ( FT_STREAM_SEEK( table.Offset + 12 ) ||
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246 |
FT_READ_ULONG( magic ) )
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247 |
goto Exit;
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248 |
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|
249 |
if ( magic != 0x5F0F3CF5UL )
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|
250 |
{
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|
251 |
FT_TRACE2(( "check_table_dir:"
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252 |
" no magic number found in `head' table\n"));
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|
253 |
error = SFNT_Err_Table_Missing;
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|
254 |
goto Exit;
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|
255 |
}
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|
256 |
|
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|
257 |
if ( FT_STREAM_SEEK( offset + ( nn + 1 ) * 16 ) )
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|
258 |
goto Exit;
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|
259 |
}
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|
260 |
else if ( table.Tag == TTAG_SING )
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261 |
has_sing = 1;
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|
262 |
else if ( table.Tag == TTAG_META )
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|
263 |
has_meta = 1;
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|
264 |
}
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265 |
|
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|
266 |
sfnt->num_tables = valid_entries;
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267 |
|
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|
268 |
if ( sfnt->num_tables == 0 )
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|
269 |
{
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|
270 |
FT_TRACE2(( "check_table_dir: no tables found\n" ));
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|
271 |
error = SFNT_Err_Unknown_File_Format;
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|
272 |
goto Exit;
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|
273 |
}
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|
274 |
|
|
|
275 |
/* if `sing' and `meta' tables are present, there is no `head' table */
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|
276 |
if ( has_head || ( has_sing && has_meta ) )
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|
277 |
{
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|
278 |
error = SFNT_Err_Ok;
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|
279 |
goto Exit;
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|
280 |
}
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|
281 |
else
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|
282 |
{
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|
|
283 |
FT_TRACE2(( "check_table_dir:" ));
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|
284 |
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
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|
285 |
FT_TRACE2(( " neither `head', `bhed', nor `sing' table found\n" ));
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|
286 |
#else
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|
287 |
FT_TRACE2(( " neither `head' nor `sing' table found\n" ));
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|
288 |
#endif
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|
289 |
error = SFNT_Err_Table_Missing;
|
|
|
290 |
}
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|
291 |
|
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|
292 |
Exit:
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|
293 |
return error;
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|
294 |
}
|
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|
295 |
|
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|
296 |
|
|
|
297 |
/*************************************************************************/
|
|
|
298 |
/* */
|
|
|
299 |
/* <Function> */
|
|
|
300 |
/* tt_face_load_font_dir */
|
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|
301 |
/* */
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|
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302 |
/* <Description> */
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|
303 |
/* Loads the header of a SFNT font file. */
|
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|
304 |
/* */
|
|
|
305 |
/* <Input> */
|
|
|
306 |
/* face :: A handle to the target face object. */
|
|
|
307 |
/* */
|
|
|
308 |
/* stream :: The input stream. */
|
|
|
309 |
/* */
|
|
|
310 |
/* <Output> */
|
|
|
311 |
/* sfnt :: The SFNT header. */
|
|
|
312 |
/* */
|
|
|
313 |
/* <Return> */
|
|
|
314 |
/* FreeType error code. 0 means success. */
|
|
|
315 |
/* */
|
|
|
316 |
/* <Note> */
|
|
|
317 |
/* The stream cursor must be at the beginning of the font directory. */
|
|
|
318 |
/* */
|
|
|
319 |
FT_LOCAL_DEF( FT_Error )
|
|
|
320 |
tt_face_load_font_dir( TT_Face face,
|
|
|
321 |
FT_Stream stream )
|
|
|
322 |
{
|
|
|
323 |
SFNT_HeaderRec sfnt;
|
|
|
324 |
FT_Error error;
|
|
|
325 |
FT_Memory memory = stream->memory;
|
|
|
326 |
TT_TableRec* entry;
|
|
|
327 |
FT_Int nn;
|
|
|
328 |
|
|
|
329 |
static const FT_Frame_Field offset_table_fields[] =
|
|
|
330 |
{
|
|
|
331 |
#undef FT_STRUCTURE
|
|
|
332 |
#define FT_STRUCTURE SFNT_HeaderRec
|
|
|
333 |
|
|
|
334 |
FT_FRAME_START( 8 ),
|
|
|
335 |
FT_FRAME_USHORT( num_tables ),
|
|
|
336 |
FT_FRAME_USHORT( search_range ),
|
|
|
337 |
FT_FRAME_USHORT( entry_selector ),
|
|
|
338 |
FT_FRAME_USHORT( range_shift ),
|
|
|
339 |
FT_FRAME_END
|
|
|
340 |
};
|
|
|
341 |
|
|
|
342 |
|
|
|
343 |
FT_TRACE2(( "tt_face_load_font_dir: %08p\n", face ));
|
|
|
344 |
|
|
|
345 |
/* read the offset table */
|
|
|
346 |
|
|
|
347 |
sfnt.offset = FT_STREAM_POS();
|
|
|
348 |
|
|
|
349 |
if ( FT_READ_ULONG( sfnt.format_tag ) ||
|
|
|
350 |
FT_STREAM_READ_FIELDS( offset_table_fields, &sfnt ) )
|
|
|
351 |
goto Exit;
|
|
|
352 |
|
|
|
353 |
/* many fonts don't have these fields set correctly */
|
|
|
354 |
#if 0
|
|
|
355 |
if ( sfnt.search_range != 1 << ( sfnt.entry_selector + 4 ) ||
|
|
|
356 |
sfnt.search_range + sfnt.range_shift != sfnt.num_tables << 4 )
|
|
|
357 |
return SFNT_Err_Unknown_File_Format;
|
|
|
358 |
#endif
|
|
|
359 |
|
|
|
360 |
/* load the table directory */
|
|
|
361 |
|
|
|
362 |
FT_TRACE2(( "-- Number of tables: %10u\n", sfnt.num_tables ));
|
|
|
363 |
FT_TRACE2(( "-- Format version: 0x%08lx\n", sfnt.format_tag ));
|
|
|
364 |
|
|
|
365 |
/* check first */
|
|
|
366 |
error = check_table_dir( &sfnt, stream );
|
|
|
367 |
if ( error )
|
|
|
368 |
{
|
|
|
369 |
FT_TRACE2(( "tt_face_load_font_dir:"
|
|
|
370 |
" invalid table directory for TrueType\n" ));
|
|
|
371 |
|
|
|
372 |
goto Exit;
|
|
|
373 |
}
|
|
|
374 |
|
|
|
375 |
face->num_tables = sfnt.num_tables;
|
|
|
376 |
face->format_tag = sfnt.format_tag;
|
|
|
377 |
|
|
|
378 |
if ( FT_QNEW_ARRAY( face->dir_tables, face->num_tables ) )
|
|
|
379 |
goto Exit;
|
|
|
380 |
|
|
|
381 |
if ( FT_STREAM_SEEK( sfnt.offset + 12 ) ||
|
|
|
382 |
FT_FRAME_ENTER( face->num_tables * 16L ) )
|
|
|
383 |
goto Exit;
|
|
|
384 |
|
|
|
385 |
entry = face->dir_tables;
|
|
|
386 |
|
|
|
387 |
FT_TRACE2(( "\n"
|
|
|
388 |
" tag offset length checksum\n"
|
|
|
389 |
" ----------------------------------\n" ));
|
|
|
390 |
|
|
|
391 |
for ( nn = 0; nn < sfnt.num_tables; nn++ )
|
|
|
392 |
{
|
|
|
393 |
entry->Tag = FT_GET_TAG4();
|
|
|
394 |
entry->CheckSum = FT_GET_ULONG();
|
|
|
395 |
entry->Offset = FT_GET_LONG();
|
|
|
396 |
entry->Length = FT_GET_LONG();
|
|
|
397 |
|
|
|
398 |
/* ignore invalid tables */
|
|
|
399 |
if ( entry->Offset + entry->Length > stream->size )
|
|
|
400 |
continue;
|
|
|
401 |
else
|
|
|
402 |
{
|
|
|
403 |
FT_TRACE2(( " %c%c%c%c %08lx %08lx %08lx\n",
|
|
|
404 |
(FT_Char)( entry->Tag >> 24 ),
|
|
|
405 |
(FT_Char)( entry->Tag >> 16 ),
|
|
|
406 |
(FT_Char)( entry->Tag >> 8 ),
|
|
|
407 |
(FT_Char)( entry->Tag ),
|
|
|
408 |
entry->Offset,
|
|
|
409 |
entry->Length,
|
|
|
410 |
entry->CheckSum ));
|
|
|
411 |
entry++;
|
|
|
412 |
}
|
|
|
413 |
}
|
|
|
414 |
|
|
|
415 |
FT_FRAME_EXIT();
|
|
|
416 |
|
|
|
417 |
FT_TRACE2(( "table directory loaded\n\n" ));
|
|
|
418 |
|
|
|
419 |
Exit:
|
|
|
420 |
return error;
|
|
|
421 |
}
|
|
|
422 |
|
|
|
423 |
|
|
|
424 |
/*************************************************************************/
|
|
|
425 |
/* */
|
|
|
426 |
/* <Function> */
|
|
|
427 |
/* tt_face_load_any */
|
|
|
428 |
/* */
|
|
|
429 |
/* <Description> */
|
|
|
430 |
/* Loads any font table into client memory. */
|
|
|
431 |
/* */
|
|
|
432 |
/* <Input> */
|
|
|
433 |
/* face :: The face object to look for. */
|
|
|
434 |
/* */
|
|
|
435 |
/* tag :: The tag of table to load. Use the value 0 if you want */
|
|
|
436 |
/* to access the whole font file, else set this parameter */
|
|
|
437 |
/* to a valid TrueType table tag that you can forge with */
|
|
|
438 |
/* the MAKE_TT_TAG macro. */
|
|
|
439 |
/* */
|
|
|
440 |
/* offset :: The starting offset in the table (or the file if */
|
|
|
441 |
/* tag == 0). */
|
|
|
442 |
/* */
|
|
|
443 |
/* length :: The address of the decision variable: */
|
|
|
444 |
/* */
|
|
|
445 |
/* If length == NULL: */
|
|
|
446 |
/* Loads the whole table. Returns an error if */
|
|
|
447 |
/* `offset' == 0! */
|
|
|
448 |
/* */
|
|
|
449 |
/* If *length == 0: */
|
|
|
450 |
/* Exits immediately; returning the length of the given */
|
|
|
451 |
/* table or of the font file, depending on the value of */
|
|
|
452 |
/* `tag'. */
|
|
|
453 |
/* */
|
|
|
454 |
/* If *length != 0: */
|
|
|
455 |
/* Loads the next `length' bytes of table or font, */
|
|
|
456 |
/* starting at offset `offset' (in table or font too). */
|
|
|
457 |
/* */
|
|
|
458 |
/* <Output> */
|
|
|
459 |
/* buffer :: The address of target buffer. */
|
|
|
460 |
/* */
|
|
|
461 |
/* <Return> */
|
|
|
462 |
/* FreeType error code. 0 means success. */
|
|
|
463 |
/* */
|
|
|
464 |
FT_LOCAL_DEF( FT_Error )
|
|
|
465 |
tt_face_load_any( TT_Face face,
|
|
|
466 |
FT_ULong tag,
|
|
|
467 |
FT_Long offset,
|
|
|
468 |
FT_Byte* buffer,
|
|
|
469 |
FT_ULong* length )
|
|
|
470 |
{
|
|
|
471 |
FT_Error error;
|
|
|
472 |
FT_Stream stream;
|
|
|
473 |
TT_Table table;
|
|
|
474 |
FT_ULong size;
|
|
|
475 |
|
|
|
476 |
|
|
|
477 |
if ( tag != 0 )
|
|
|
478 |
{
|
|
|
479 |
/* look for tag in font directory */
|
|
|
480 |
table = tt_face_lookup_table( face, tag );
|
|
|
481 |
if ( !table )
|
|
|
482 |
{
|
|
|
483 |
error = SFNT_Err_Table_Missing;
|
|
|
484 |
goto Exit;
|
|
|
485 |
}
|
|
|
486 |
|
|
|
487 |
offset += table->Offset;
|
|
|
488 |
size = table->Length;
|
|
|
489 |
}
|
|
|
490 |
else
|
|
|
491 |
/* tag == 0 -- the user wants to access the font file directly */
|
|
|
492 |
size = face->root.stream->size;
|
|
|
493 |
|
|
|
494 |
if ( length && *length == 0 )
|
|
|
495 |
{
|
|
|
496 |
*length = size;
|
|
|
497 |
|
|
|
498 |
return SFNT_Err_Ok;
|
|
|
499 |
}
|
|
|
500 |
|
|
|
501 |
if ( length )
|
|
|
502 |
size = *length;
|
|
|
503 |
|
|
|
504 |
stream = face->root.stream;
|
|
|
505 |
/* the `if' is syntactic sugar for picky compilers */
|
|
|
506 |
if ( FT_STREAM_READ_AT( offset, buffer, size ) )
|
|
|
507 |
goto Exit;
|
|
|
508 |
|
|
|
509 |
Exit:
|
|
|
510 |
return error;
|
|
|
511 |
}
|
|
|
512 |
|
|
|
513 |
|
|
|
514 |
/*************************************************************************/
|
|
|
515 |
/* */
|
|
|
516 |
/* <Function> */
|
|
|
517 |
/* tt_face_load_generic_header */
|
|
|
518 |
/* */
|
|
|
519 |
/* <Description> */
|
|
|
520 |
/* Loads the TrueType table `head' or `bhed'. */
|
|
|
521 |
/* */
|
|
|
522 |
/* <Input> */
|
|
|
523 |
/* face :: A handle to the target face object. */
|
|
|
524 |
/* */
|
|
|
525 |
/* stream :: The input stream. */
|
|
|
526 |
/* */
|
|
|
527 |
/* <Return> */
|
|
|
528 |
/* FreeType error code. 0 means success. */
|
|
|
529 |
/* */
|
|
|
530 |
static FT_Error
|
|
|
531 |
tt_face_load_generic_header( TT_Face face,
|
|
|
532 |
FT_Stream stream,
|
|
|
533 |
FT_ULong tag )
|
|
|
534 |
{
|
|
|
535 |
FT_Error error;
|
|
|
536 |
TT_Header* header;
|
|
|
537 |
|
|
|
538 |
static const FT_Frame_Field header_fields[] =
|
|
|
539 |
{
|
|
|
540 |
#undef FT_STRUCTURE
|
|
|
541 |
#define FT_STRUCTURE TT_Header
|
|
|
542 |
|
|
|
543 |
FT_FRAME_START( 54 ),
|
|
|
544 |
FT_FRAME_ULONG ( Table_Version ),
|
|
|
545 |
FT_FRAME_ULONG ( Font_Revision ),
|
|
|
546 |
FT_FRAME_LONG ( CheckSum_Adjust ),
|
|
|
547 |
FT_FRAME_LONG ( Magic_Number ),
|
|
|
548 |
FT_FRAME_USHORT( Flags ),
|
|
|
549 |
FT_FRAME_USHORT( Units_Per_EM ),
|
|
|
550 |
FT_FRAME_LONG ( Created[0] ),
|
|
|
551 |
FT_FRAME_LONG ( Created[1] ),
|
|
|
552 |
FT_FRAME_LONG ( Modified[0] ),
|
|
|
553 |
FT_FRAME_LONG ( Modified[1] ),
|
|
|
554 |
FT_FRAME_SHORT ( xMin ),
|
|
|
555 |
FT_FRAME_SHORT ( yMin ),
|
|
|
556 |
FT_FRAME_SHORT ( xMax ),
|
|
|
557 |
FT_FRAME_SHORT ( yMax ),
|
|
|
558 |
FT_FRAME_USHORT( Mac_Style ),
|
|
|
559 |
FT_FRAME_USHORT( Lowest_Rec_PPEM ),
|
|
|
560 |
FT_FRAME_SHORT ( Font_Direction ),
|
|
|
561 |
FT_FRAME_SHORT ( Index_To_Loc_Format ),
|
|
|
562 |
FT_FRAME_SHORT ( Glyph_Data_Format ),
|
|
|
563 |
FT_FRAME_END
|
|
|
564 |
};
|
|
|
565 |
|
|
|
566 |
|
|
|
567 |
error = face->goto_table( face, tag, stream, 0 );
|
|
|
568 |
if ( error )
|
|
|
569 |
goto Exit;
|
|
|
570 |
|
|
|
571 |
header = &face->header;
|
|
|
572 |
|
|
|
573 |
if ( FT_STREAM_READ_FIELDS( header_fields, header ) )
|
|
|
574 |
goto Exit;
|
|
|
575 |
|
|
|
576 |
FT_TRACE3(( "Units per EM: %4u\n", header->Units_Per_EM ));
|
|
|
577 |
FT_TRACE3(( "IndexToLoc: %4d\n", header->Index_To_Loc_Format ));
|
|
|
578 |
|
|
|
579 |
Exit:
|
|
|
580 |
return error;
|
|
|
581 |
}
|
|
|
582 |
|
|
|
583 |
|
|
|
584 |
FT_LOCAL_DEF( FT_Error )
|
|
|
585 |
tt_face_load_head( TT_Face face,
|
|
|
586 |
FT_Stream stream )
|
|
|
587 |
{
|
|
|
588 |
return tt_face_load_generic_header( face, stream, TTAG_head );
|
|
|
589 |
}
|
|
|
590 |
|
|
|
591 |
|
|
|
592 |
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
|
|
|
593 |
|
|
|
594 |
FT_LOCAL_DEF( FT_Error )
|
|
|
595 |
tt_face_load_bhed( TT_Face face,
|
|
|
596 |
FT_Stream stream )
|
|
|
597 |
{
|
|
|
598 |
return tt_face_load_generic_header( face, stream, TTAG_bhed );
|
|
|
599 |
}
|
|
|
600 |
|
|
|
601 |
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
|
|
|
602 |
|
|
|
603 |
|
|
|
604 |
/*************************************************************************/
|
|
|
605 |
/* */
|
|
|
606 |
/* <Function> */
|
|
|
607 |
/* tt_face_load_max_profile */
|
|
|
608 |
/* */
|
|
|
609 |
/* <Description> */
|
|
|
610 |
/* Loads the maximum profile into a face object. */
|
|
|
611 |
/* */
|
|
|
612 |
/* <Input> */
|
|
|
613 |
/* face :: A handle to the target face object. */
|
|
|
614 |
/* */
|
|
|
615 |
/* stream :: The input stream. */
|
|
|
616 |
/* */
|
|
|
617 |
/* <Return> */
|
|
|
618 |
/* FreeType error code. 0 means success. */
|
|
|
619 |
/* */
|
|
|
620 |
FT_LOCAL_DEF( FT_Error )
|
|
|
621 |
tt_face_load_maxp( TT_Face face,
|
|
|
622 |
FT_Stream stream )
|
|
|
623 |
{
|
|
|
624 |
FT_Error error;
|
|
|
625 |
TT_MaxProfile* maxProfile = &face->max_profile;
|
|
|
626 |
|
|
|
627 |
const FT_Frame_Field maxp_fields[] =
|
|
|
628 |
{
|
|
|
629 |
#undef FT_STRUCTURE
|
|
|
630 |
#define FT_STRUCTURE TT_MaxProfile
|
|
|
631 |
|
|
|
632 |
FT_FRAME_START( 6 ),
|
|
|
633 |
FT_FRAME_LONG ( version ),
|
|
|
634 |
FT_FRAME_USHORT( numGlyphs ),
|
|
|
635 |
FT_FRAME_END
|
|
|
636 |
};
|
|
|
637 |
|
|
|
638 |
const FT_Frame_Field maxp_fields_extra[] =
|
|
|
639 |
{
|
|
|
640 |
FT_FRAME_START( 26 ),
|
|
|
641 |
FT_FRAME_USHORT( maxPoints ),
|
|
|
642 |
FT_FRAME_USHORT( maxContours ),
|
|
|
643 |
FT_FRAME_USHORT( maxCompositePoints ),
|
|
|
644 |
FT_FRAME_USHORT( maxCompositeContours ),
|
|
|
645 |
FT_FRAME_USHORT( maxZones ),
|
|
|
646 |
FT_FRAME_USHORT( maxTwilightPoints ),
|
|
|
647 |
FT_FRAME_USHORT( maxStorage ),
|
|
|
648 |
FT_FRAME_USHORT( maxFunctionDefs ),
|
|
|
649 |
FT_FRAME_USHORT( maxInstructionDefs ),
|
|
|
650 |
FT_FRAME_USHORT( maxStackElements ),
|
|
|
651 |
FT_FRAME_USHORT( maxSizeOfInstructions ),
|
|
|
652 |
FT_FRAME_USHORT( maxComponentElements ),
|
|
|
653 |
FT_FRAME_USHORT( maxComponentDepth ),
|
|
|
654 |
FT_FRAME_END
|
|
|
655 |
};
|
|
|
656 |
|
|
|
657 |
|
|
|
658 |
error = face->goto_table( face, TTAG_maxp, stream, 0 );
|
|
|
659 |
if ( error )
|
|
|
660 |
goto Exit;
|
|
|
661 |
|
|
|
662 |
if ( FT_STREAM_READ_FIELDS( maxp_fields, maxProfile ) )
|
|
|
663 |
goto Exit;
|
|
|
664 |
|
|
|
665 |
maxProfile->maxPoints = 0;
|
|
|
666 |
maxProfile->maxContours = 0;
|
|
|
667 |
maxProfile->maxCompositePoints = 0;
|
|
|
668 |
maxProfile->maxCompositeContours = 0;
|
|
|
669 |
maxProfile->maxZones = 0;
|
|
|
670 |
maxProfile->maxTwilightPoints = 0;
|
|
|
671 |
maxProfile->maxStorage = 0;
|
|
|
672 |
maxProfile->maxFunctionDefs = 0;
|
|
|
673 |
maxProfile->maxInstructionDefs = 0;
|
|
|
674 |
maxProfile->maxStackElements = 0;
|
|
|
675 |
maxProfile->maxSizeOfInstructions = 0;
|
|
|
676 |
maxProfile->maxComponentElements = 0;
|
|
|
677 |
maxProfile->maxComponentDepth = 0;
|
|
|
678 |
|
|
|
679 |
if ( maxProfile->version >= 0x10000L )
|
|
|
680 |
{
|
|
|
681 |
if ( FT_STREAM_READ_FIELDS( maxp_fields_extra, maxProfile ) )
|
|
|
682 |
goto Exit;
|
|
|
683 |
|
|
|
684 |
/* XXX: an adjustment that is necessary to load certain */
|
|
|
685 |
/* broken fonts like `Keystrokes MT' :-( */
|
|
|
686 |
/* */
|
|
|
687 |
/* We allocate 64 function entries by default when */
|
|
|
688 |
/* the maxFunctionDefs value is smaller. */
|
|
|
689 |
|
|
|
690 |
if ( maxProfile->maxFunctionDefs < 64 )
|
|
|
691 |
maxProfile->maxFunctionDefs = 64;
|
|
|
692 |
|
|
|
693 |
/* we add 4 phantom points later */
|
|
|
694 |
if ( maxProfile->maxTwilightPoints > ( 0xFFFFU - 4 ) )
|
|
|
695 |
{
|
|
|
696 |
FT_TRACE0(( "tt_face_load_maxp:"
|
|
|
697 |
" too much twilight points in `maxp' table;\n"
|
|
|
698 |
" "
|
|
|
699 |
" some glyphs might be rendered incorrectly\n" ));
|
|
|
700 |
|
|
|
701 |
maxProfile->maxTwilightPoints = 0xFFFFU - 4;
|
|
|
702 |
}
|
|
|
703 |
|
|
|
704 |
/* we arbitrarily limit recursion to avoid stack exhaustion */
|
|
|
705 |
if ( maxProfile->maxComponentDepth > 100 )
|
|
|
706 |
{
|
|
|
707 |
FT_TRACE0(( "tt_face_load_maxp:"
|
|
|
708 |
" abnormally large component depth (%d) set to 100\n",
|
|
|
709 |
maxProfile->maxComponentDepth ));
|
|
|
710 |
maxProfile->maxComponentDepth = 100;
|
|
|
711 |
}
|
|
|
712 |
}
|
|
|
713 |
|
|
|
714 |
FT_TRACE3(( "numGlyphs: %u\n", maxProfile->numGlyphs ));
|
|
|
715 |
|
|
|
716 |
Exit:
|
|
|
717 |
return error;
|
|
|
718 |
}
|
|
|
719 |
|
|
|
720 |
|
|
|
721 |
/*************************************************************************/
|
|
|
722 |
/* */
|
|
|
723 |
/* <Function> */
|
|
|
724 |
/* tt_face_load_names */
|
|
|
725 |
/* */
|
|
|
726 |
/* <Description> */
|
|
|
727 |
/* Loads the name records. */
|
|
|
728 |
/* */
|
|
|
729 |
/* <Input> */
|
|
|
730 |
/* face :: A handle to the target face object. */
|
|
|
731 |
/* */
|
|
|
732 |
/* stream :: The input stream. */
|
|
|
733 |
/* */
|
|
|
734 |
/* <Return> */
|
|
|
735 |
/* FreeType error code. 0 means success. */
|
|
|
736 |
/* */
|
|
|
737 |
FT_LOCAL_DEF( FT_Error )
|
|
|
738 |
tt_face_load_name( TT_Face face,
|
|
|
739 |
FT_Stream stream )
|
|
|
740 |
{
|
|
|
741 |
FT_Error error;
|
|
|
742 |
FT_Memory memory = stream->memory;
|
|
|
743 |
FT_ULong table_pos, table_len;
|
|
|
744 |
FT_ULong storage_start, storage_limit;
|
|
|
745 |
FT_UInt count;
|
|
|
746 |
TT_NameTable table;
|
|
|
747 |
|
|
|
748 |
static const FT_Frame_Field name_table_fields[] =
|
|
|
749 |
{
|
|
|
750 |
#undef FT_STRUCTURE
|
|
|
751 |
#define FT_STRUCTURE TT_NameTableRec
|
|
|
752 |
|
|
|
753 |
FT_FRAME_START( 6 ),
|
|
|
754 |
FT_FRAME_USHORT( format ),
|
|
|
755 |
FT_FRAME_USHORT( numNameRecords ),
|
|
|
756 |
FT_FRAME_USHORT( storageOffset ),
|
|
|
757 |
FT_FRAME_END
|
|
|
758 |
};
|
|
|
759 |
|
|
|
760 |
static const FT_Frame_Field name_record_fields[] =
|
|
|
761 |
{
|
|
|
762 |
#undef FT_STRUCTURE
|
|
|
763 |
#define FT_STRUCTURE TT_NameEntryRec
|
|
|
764 |
|
|
|
765 |
/* no FT_FRAME_START */
|
|
|
766 |
FT_FRAME_USHORT( platformID ),
|
|
|
767 |
FT_FRAME_USHORT( encodingID ),
|
|
|
768 |
FT_FRAME_USHORT( languageID ),
|
|
|
769 |
FT_FRAME_USHORT( nameID ),
|
|
|
770 |
FT_FRAME_USHORT( stringLength ),
|
|
|
771 |
FT_FRAME_USHORT( stringOffset ),
|
|
|
772 |
FT_FRAME_END
|
|
|
773 |
};
|
|
|
774 |
|
|
|
775 |
|
|
|
776 |
table = &face->name_table;
|
|
|
777 |
table->stream = stream;
|
|
|
778 |
|
|
|
779 |
error = face->goto_table( face, TTAG_name, stream, &table_len );
|
|
|
780 |
if ( error )
|
|
|
781 |
goto Exit;
|
|
|
782 |
|
|
|
783 |
table_pos = FT_STREAM_POS();
|
|
|
784 |
|
|
|
785 |
|
|
|
786 |
if ( FT_STREAM_READ_FIELDS( name_table_fields, table ) )
|
|
|
787 |
goto Exit;
|
|
|
788 |
|
|
|
789 |
/* Some popular Asian fonts have an invalid `storageOffset' value */
|
|
|
790 |
/* (it should be at least "6 + 12*num_names"). However, the string */
|
|
|
791 |
/* offsets, computed as "storageOffset + entry->stringOffset", are */
|
|
|
792 |
/* valid pointers within the name table... */
|
|
|
793 |
/* */
|
|
|
794 |
/* We thus can't check `storageOffset' right now. */
|
|
|
795 |
/* */
|
|
|
796 |
storage_start = table_pos + 6 + 12*table->numNameRecords;
|
|
|
797 |
storage_limit = table_pos + table_len;
|
|
|
798 |
|
|
|
799 |
if ( storage_start > storage_limit )
|
|
|
800 |
{
|
|
|
801 |
FT_ERROR(( "tt_face_load_name: invalid `name' table\n" ));
|
|
|
802 |
error = SFNT_Err_Name_Table_Missing;
|
|
|
803 |
goto Exit;
|
|
|
804 |
}
|
|
|
805 |
|
|
|
806 |
/* Allocate the array of name records. */
|
|
|
807 |
count = table->numNameRecords;
|
|
|
808 |
table->numNameRecords = 0;
|
|
|
809 |
|
|
|
810 |
if ( FT_NEW_ARRAY( table->names, count ) ||
|
|
|
811 |
FT_FRAME_ENTER( count * 12 ) )
|
|
|
812 |
goto Exit;
|
|
|
813 |
|
|
|
814 |
/* Load the name records and determine how much storage is needed */
|
|
|
815 |
/* to hold the strings themselves. */
|
|
|
816 |
{
|
|
|
817 |
TT_NameEntryRec* entry = table->names;
|
|
|
818 |
|
|
|
819 |
|
|
|
820 |
for ( ; count > 0; count-- )
|
|
|
821 |
{
|
|
|
822 |
if ( FT_STREAM_READ_FIELDS( name_record_fields, entry ) )
|
|
|
823 |
continue;
|
|
|
824 |
|
|
|
825 |
/* check that the name is not empty */
|
|
|
826 |
if ( entry->stringLength == 0 )
|
|
|
827 |
continue;
|
|
|
828 |
|
|
|
829 |
/* check that the name string is within the table */
|
|
|
830 |
entry->stringOffset += table_pos + table->storageOffset;
|
|
|
831 |
if ( entry->stringOffset < storage_start ||
|
|
|
832 |
entry->stringOffset + entry->stringLength > storage_limit )
|
|
|
833 |
{
|
|
|
834 |
/* invalid entry - ignore it */
|
|
|
835 |
entry->stringOffset = 0;
|
|
|
836 |
entry->stringLength = 0;
|
|
|
837 |
continue;
|
|
|
838 |
}
|
|
|
839 |
|
|
|
840 |
entry++;
|
|
|
841 |
}
|
|
|
842 |
|
|
|
843 |
table->numNameRecords = (FT_UInt)( entry - table->names );
|
|
|
844 |
}
|
|
|
845 |
|
|
|
846 |
FT_FRAME_EXIT();
|
|
|
847 |
|
|
|
848 |
/* everything went well, update face->num_names */
|
|
|
849 |
face->num_names = (FT_UShort) table->numNameRecords;
|
|
|
850 |
|
|
|
851 |
Exit:
|
|
|
852 |
return error;
|
|
|
853 |
}
|
|
|
854 |
|
|
|
855 |
|
|
|
856 |
/*************************************************************************/
|
|
|
857 |
/* */
|
|
|
858 |
/* <Function> */
|
|
|
859 |
/* tt_face_free_names */
|
|
|
860 |
/* */
|
|
|
861 |
/* <Description> */
|
|
|
862 |
/* Frees the name records. */
|
|
|
863 |
/* */
|
|
|
864 |
/* <Input> */
|
|
|
865 |
/* face :: A handle to the target face object. */
|
|
|
866 |
/* */
|
|
|
867 |
FT_LOCAL_DEF( void )
|
|
|
868 |
tt_face_free_name( TT_Face face )
|
|
|
869 |
{
|
|
|
870 |
FT_Memory memory = face->root.driver->root.memory;
|
|
|
871 |
TT_NameTable table = &face->name_table;
|
|
|
872 |
TT_NameEntry entry = table->names;
|
|
|
873 |
FT_UInt count = table->numNameRecords;
|
|
|
874 |
|
|
|
875 |
|
|
|
876 |
if ( table->names )
|
|
|
877 |
{
|
|
|
878 |
for ( ; count > 0; count--, entry++ )
|
|
|
879 |
{
|
|
|
880 |
FT_FREE( entry->string );
|
|
|
881 |
entry->stringLength = 0;
|
|
|
882 |
}
|
|
|
883 |
|
|
|
884 |
/* free strings table */
|
|
|
885 |
FT_FREE( table->names );
|
|
|
886 |
}
|
|
|
887 |
|
|
|
888 |
table->numNameRecords = 0;
|
|
|
889 |
table->format = 0;
|
|
|
890 |
table->storageOffset = 0;
|
|
|
891 |
}
|
|
|
892 |
|
|
|
893 |
|
|
|
894 |
/*************************************************************************/
|
|
|
895 |
/* */
|
|
|
896 |
/* <Function> */
|
|
|
897 |
/* tt_face_load_cmap */
|
|
|
898 |
/* */
|
|
|
899 |
/* <Description> */
|
|
|
900 |
/* Loads the cmap directory in a face object. The cmaps themselves */
|
|
|
901 |
/* are loaded on demand in the `ttcmap.c' module. */
|
|
|
902 |
/* */
|
|
|
903 |
/* <Input> */
|
|
|
904 |
/* face :: A handle to the target face object. */
|
|
|
905 |
/* */
|
|
|
906 |
/* stream :: A handle to the input stream. */
|
|
|
907 |
/* */
|
|
|
908 |
/* <Return> */
|
|
|
909 |
/* FreeType error code. 0 means success. */
|
|
|
910 |
/* */
|
|
|
911 |
|
|
|
912 |
FT_LOCAL_DEF( FT_Error )
|
|
|
913 |
tt_face_load_cmap( TT_Face face,
|
|
|
914 |
FT_Stream stream )
|
|
|
915 |
{
|
|
|
916 |
FT_Error error;
|
|
|
917 |
|
|
|
918 |
|
|
|
919 |
error = face->goto_table( face, TTAG_cmap, stream, &face->cmap_size );
|
|
|
920 |
if ( error )
|
|
|
921 |
goto Exit;
|
|
|
922 |
|
|
|
923 |
if ( FT_FRAME_EXTRACT( face->cmap_size, face->cmap_table ) )
|
|
|
924 |
face->cmap_size = 0;
|
|
|
925 |
|
|
|
926 |
Exit:
|
|
|
927 |
return error;
|
|
|
928 |
}
|
|
|
929 |
|
|
|
930 |
|
|
|
931 |
|
|
|
932 |
/*************************************************************************/
|
|
|
933 |
/* */
|
|
|
934 |
/* <Function> */
|
|
|
935 |
/* tt_face_load_os2 */
|
|
|
936 |
/* */
|
|
|
937 |
/* <Description> */
|
|
|
938 |
/* Loads the OS2 table. */
|
|
|
939 |
/* */
|
|
|
940 |
/* <Input> */
|
|
|
941 |
/* face :: A handle to the target face object. */
|
|
|
942 |
/* */
|
|
|
943 |
/* stream :: A handle to the input stream. */
|
|
|
944 |
/* */
|
|
|
945 |
/* <Return> */
|
|
|
946 |
/* FreeType error code. 0 means success. */
|
|
|
947 |
/* */
|
|
|
948 |
FT_LOCAL_DEF( FT_Error )
|
|
|
949 |
tt_face_load_os2( TT_Face face,
|
|
|
950 |
FT_Stream stream )
|
|
|
951 |
{
|
|
|
952 |
FT_Error error;
|
|
|
953 |
TT_OS2* os2;
|
|
|
954 |
|
|
|
955 |
const FT_Frame_Field os2_fields[] =
|
|
|
956 |
{
|
|
|
957 |
#undef FT_STRUCTURE
|
|
|
958 |
#define FT_STRUCTURE TT_OS2
|
|
|
959 |
|
|
|
960 |
FT_FRAME_START( 78 ),
|
|
|
961 |
FT_FRAME_USHORT( version ),
|
|
|
962 |
FT_FRAME_SHORT ( xAvgCharWidth ),
|
|
|
963 |
FT_FRAME_USHORT( usWeightClass ),
|
|
|
964 |
FT_FRAME_USHORT( usWidthClass ),
|
|
|
965 |
FT_FRAME_SHORT ( fsType ),
|
|
|
966 |
FT_FRAME_SHORT ( ySubscriptXSize ),
|
|
|
967 |
FT_FRAME_SHORT ( ySubscriptYSize ),
|
|
|
968 |
FT_FRAME_SHORT ( ySubscriptXOffset ),
|
|
|
969 |
FT_FRAME_SHORT ( ySubscriptYOffset ),
|
|
|
970 |
FT_FRAME_SHORT ( ySuperscriptXSize ),
|
|
|
971 |
FT_FRAME_SHORT ( ySuperscriptYSize ),
|
|
|
972 |
FT_FRAME_SHORT ( ySuperscriptXOffset ),
|
|
|
973 |
FT_FRAME_SHORT ( ySuperscriptYOffset ),
|
|
|
974 |
FT_FRAME_SHORT ( yStrikeoutSize ),
|
|
|
975 |
FT_FRAME_SHORT ( yStrikeoutPosition ),
|
|
|
976 |
FT_FRAME_SHORT ( sFamilyClass ),
|
|
|
977 |
FT_FRAME_BYTE ( panose[0] ),
|
|
|
978 |
FT_FRAME_BYTE ( panose[1] ),
|
|
|
979 |
FT_FRAME_BYTE ( panose[2] ),
|
|
|
980 |
FT_FRAME_BYTE ( panose[3] ),
|
|
|
981 |
FT_FRAME_BYTE ( panose[4] ),
|
|
|
982 |
FT_FRAME_BYTE ( panose[5] ),
|
|
|
983 |
FT_FRAME_BYTE ( panose[6] ),
|
|
|
984 |
FT_FRAME_BYTE ( panose[7] ),
|
|
|
985 |
FT_FRAME_BYTE ( panose[8] ),
|
|
|
986 |
FT_FRAME_BYTE ( panose[9] ),
|
|
|
987 |
FT_FRAME_ULONG ( ulUnicodeRange1 ),
|
|
|
988 |
FT_FRAME_ULONG ( ulUnicodeRange2 ),
|
|
|
989 |
FT_FRAME_ULONG ( ulUnicodeRange3 ),
|
|
|
990 |
FT_FRAME_ULONG ( ulUnicodeRange4 ),
|
|
|
991 |
FT_FRAME_BYTE ( achVendID[0] ),
|
|
|
992 |
FT_FRAME_BYTE ( achVendID[1] ),
|
|
|
993 |
FT_FRAME_BYTE ( achVendID[2] ),
|
|
|
994 |
FT_FRAME_BYTE ( achVendID[3] ),
|
|
|
995 |
|
|
|
996 |
FT_FRAME_USHORT( fsSelection ),
|
|
|
997 |
FT_FRAME_USHORT( usFirstCharIndex ),
|
|
|
998 |
FT_FRAME_USHORT( usLastCharIndex ),
|
|
|
999 |
FT_FRAME_SHORT ( sTypoAscender ),
|
|
|
1000 |
FT_FRAME_SHORT ( sTypoDescender ),
|
|
|
1001 |
FT_FRAME_SHORT ( sTypoLineGap ),
|
|
|
1002 |
FT_FRAME_USHORT( usWinAscent ),
|
|
|
1003 |
FT_FRAME_USHORT( usWinDescent ),
|
|
|
1004 |
FT_FRAME_END
|
|
|
1005 |
};
|
|
|
1006 |
|
|
|
1007 |
const FT_Frame_Field os2_fields_extra[] =
|
|
|
1008 |
{
|
|
|
1009 |
FT_FRAME_START( 8 ),
|
|
|
1010 |
FT_FRAME_ULONG( ulCodePageRange1 ),
|
|
|
1011 |
FT_FRAME_ULONG( ulCodePageRange2 ),
|
|
|
1012 |
FT_FRAME_END
|
|
|
1013 |
};
|
|
|
1014 |
|
|
|
1015 |
const FT_Frame_Field os2_fields_extra2[] =
|
|
|
1016 |
{
|
|
|
1017 |
FT_FRAME_START( 10 ),
|
|
|
1018 |
FT_FRAME_SHORT ( sxHeight ),
|
|
|
1019 |
FT_FRAME_SHORT ( sCapHeight ),
|
|
|
1020 |
FT_FRAME_USHORT( usDefaultChar ),
|
|
|
1021 |
FT_FRAME_USHORT( usBreakChar ),
|
|
|
1022 |
FT_FRAME_USHORT( usMaxContext ),
|
|
|
1023 |
FT_FRAME_END
|
|
|
1024 |
};
|
|
|
1025 |
|
|
|
1026 |
|
|
|
1027 |
/* We now support old Mac fonts where the OS/2 table doesn't */
|
|
|
1028 |
/* exist. Simply put, we set the `version' field to 0xFFFF */
|
|
|
1029 |
/* and test this value each time we need to access the table. */
|
|
|
1030 |
error = face->goto_table( face, TTAG_OS2, stream, 0 );
|
|
|
1031 |
if ( error )
|
|
|
1032 |
goto Exit;
|
|
|
1033 |
|
|
|
1034 |
os2 = &face->os2;
|
|
|
1035 |
|
|
|
1036 |
if ( FT_STREAM_READ_FIELDS( os2_fields, os2 ) )
|
|
|
1037 |
goto Exit;
|
|
|
1038 |
|
|
|
1039 |
os2->ulCodePageRange1 = 0;
|
|
|
1040 |
os2->ulCodePageRange2 = 0;
|
|
|
1041 |
os2->sxHeight = 0;
|
|
|
1042 |
os2->sCapHeight = 0;
|
|
|
1043 |
os2->usDefaultChar = 0;
|
|
|
1044 |
os2->usBreakChar = 0;
|
|
|
1045 |
os2->usMaxContext = 0;
|
|
|
1046 |
|
|
|
1047 |
if ( os2->version >= 0x0001 )
|
|
|
1048 |
{
|
|
|
1049 |
/* only version 1 tables */
|
|
|
1050 |
if ( FT_STREAM_READ_FIELDS( os2_fields_extra, os2 ) )
|
|
|
1051 |
goto Exit;
|
|
|
1052 |
|
|
|
1053 |
if ( os2->version >= 0x0002 )
|
|
|
1054 |
{
|
|
|
1055 |
/* only version 2 tables */
|
|
|
1056 |
if ( FT_STREAM_READ_FIELDS( os2_fields_extra2, os2 ) )
|
|
|
1057 |
goto Exit;
|
|
|
1058 |
}
|
|
|
1059 |
}
|
|
|
1060 |
|
|
|
1061 |
FT_TRACE3(( "sTypoAscender: %4d\n", os2->sTypoAscender ));
|
|
|
1062 |
FT_TRACE3(( "sTypoDescender: %4d\n", os2->sTypoDescender ));
|
|
|
1063 |
FT_TRACE3(( "usWinAscent: %4u\n", os2->usWinAscent ));
|
|
|
1064 |
FT_TRACE3(( "usWinDescent: %4u\n", os2->usWinDescent ));
|
|
|
1065 |
FT_TRACE3(( "fsSelection: 0x%2x\n", os2->fsSelection ));
|
|
|
1066 |
|
|
|
1067 |
Exit:
|
|
|
1068 |
return error;
|
|
|
1069 |
}
|
|
|
1070 |
|
|
|
1071 |
|
|
|
1072 |
/*************************************************************************/
|
|
|
1073 |
/* */
|
|
|
1074 |
/* <Function> */
|
|
|
1075 |
/* tt_face_load_postscript */
|
|
|
1076 |
/* */
|
|
|
1077 |
/* <Description> */
|
|
|
1078 |
/* Loads the Postscript table. */
|
|
|
1079 |
/* */
|
|
|
1080 |
/* <Input> */
|
|
|
1081 |
/* face :: A handle to the target face object. */
|
|
|
1082 |
/* */
|
|
|
1083 |
/* stream :: A handle to the input stream. */
|
|
|
1084 |
/* */
|
|
|
1085 |
/* <Return> */
|
|
|
1086 |
/* FreeType error code. 0 means success. */
|
|
|
1087 |
/* */
|
|
|
1088 |
FT_LOCAL_DEF( FT_Error )
|
|
|
1089 |
tt_face_load_post( TT_Face face,
|
|
|
1090 |
FT_Stream stream )
|
|
|
1091 |
{
|
|
|
1092 |
FT_Error error;
|
|
|
1093 |
TT_Postscript* post = &face->postscript;
|
|
|
1094 |
|
|
|
1095 |
static const FT_Frame_Field post_fields[] =
|
|
|
1096 |
{
|
|
|
1097 |
#undef FT_STRUCTURE
|
|
|
1098 |
#define FT_STRUCTURE TT_Postscript
|
|
|
1099 |
|
|
|
1100 |
FT_FRAME_START( 32 ),
|
|
|
1101 |
FT_FRAME_ULONG( FormatType ),
|
|
|
1102 |
FT_FRAME_ULONG( italicAngle ),
|
|
|
1103 |
FT_FRAME_SHORT( underlinePosition ),
|
|
|
1104 |
FT_FRAME_SHORT( underlineThickness ),
|
|
|
1105 |
FT_FRAME_ULONG( isFixedPitch ),
|
|
|
1106 |
FT_FRAME_ULONG( minMemType42 ),
|
|
|
1107 |
FT_FRAME_ULONG( maxMemType42 ),
|
|
|
1108 |
FT_FRAME_ULONG( minMemType1 ),
|
|
|
1109 |
FT_FRAME_ULONG( maxMemType1 ),
|
|
|
1110 |
FT_FRAME_END
|
|
|
1111 |
};
|
|
|
1112 |
|
|
|
1113 |
|
|
|
1114 |
error = face->goto_table( face, TTAG_post, stream, 0 );
|
|
|
1115 |
if ( error )
|
|
|
1116 |
return error;
|
|
|
1117 |
|
|
|
1118 |
if ( FT_STREAM_READ_FIELDS( post_fields, post ) )
|
|
|
1119 |
return error;
|
|
|
1120 |
|
|
|
1121 |
/* we don't load the glyph names, we do that in another */
|
|
|
1122 |
/* module (ttpost). */
|
|
|
1123 |
|
|
|
1124 |
FT_TRACE3(( "FormatType: 0x%x\n", post->FormatType ));
|
|
|
1125 |
FT_TRACE3(( "isFixedPitch: %s\n", post->isFixedPitch
|
|
|
1126 |
? " yes" : " no" ));
|
|
|
1127 |
|
|
|
1128 |
return SFNT_Err_Ok;
|
|
|
1129 |
}
|
|
|
1130 |
|
|
|
1131 |
|
|
|
1132 |
/*************************************************************************/
|
|
|
1133 |
/* */
|
|
|
1134 |
/* <Function> */
|
|
|
1135 |
/* tt_face_load_pclt */
|
|
|
1136 |
/* */
|
|
|
1137 |
/* <Description> */
|
|
|
1138 |
/* Loads the PCL 5 Table. */
|
|
|
1139 |
/* */
|
|
|
1140 |
/* <Input> */
|
|
|
1141 |
/* face :: A handle to the target face object. */
|
|
|
1142 |
/* */
|
|
|
1143 |
/* stream :: A handle to the input stream. */
|
|
|
1144 |
/* */
|
|
|
1145 |
/* <Return> */
|
|
|
1146 |
/* FreeType error code. 0 means success. */
|
|
|
1147 |
/* */
|
|
|
1148 |
FT_LOCAL_DEF( FT_Error )
|
|
|
1149 |
tt_face_load_pclt( TT_Face face,
|
|
|
1150 |
FT_Stream stream )
|
|
|
1151 |
{
|
|
|
1152 |
static const FT_Frame_Field pclt_fields[] =
|
|
|
1153 |
{
|
|
|
1154 |
#undef FT_STRUCTURE
|
|
|
1155 |
#define FT_STRUCTURE TT_PCLT
|
|
|
1156 |
|
|
|
1157 |
FT_FRAME_START( 54 ),
|
|
|
1158 |
FT_FRAME_ULONG ( Version ),
|
|
|
1159 |
FT_FRAME_ULONG ( FontNumber ),
|
|
|
1160 |
FT_FRAME_USHORT( Pitch ),
|
|
|
1161 |
FT_FRAME_USHORT( xHeight ),
|
|
|
1162 |
FT_FRAME_USHORT( Style ),
|
|
|
1163 |
FT_FRAME_USHORT( TypeFamily ),
|
|
|
1164 |
FT_FRAME_USHORT( CapHeight ),
|
|
|
1165 |
FT_FRAME_BYTES ( TypeFace, 16 ),
|
|
|
1166 |
FT_FRAME_BYTES ( CharacterComplement, 8 ),
|
|
|
1167 |
FT_FRAME_BYTES ( FileName, 6 ),
|
|
|
1168 |
FT_FRAME_CHAR ( StrokeWeight ),
|
|
|
1169 |
FT_FRAME_CHAR ( WidthType ),
|
|
|
1170 |
FT_FRAME_BYTE ( SerifStyle ),
|
|
|
1171 |
FT_FRAME_BYTE ( Reserved ),
|
|
|
1172 |
FT_FRAME_END
|
|
|
1173 |
};
|
|
|
1174 |
|
|
|
1175 |
FT_Error error;
|
|
|
1176 |
TT_PCLT* pclt = &face->pclt;
|
|
|
1177 |
|
|
|
1178 |
|
|
|
1179 |
/* optional table */
|
|
|
1180 |
error = face->goto_table( face, TTAG_PCLT, stream, 0 );
|
|
|
1181 |
if ( error )
|
|
|
1182 |
goto Exit;
|
|
|
1183 |
|
|
|
1184 |
if ( FT_STREAM_READ_FIELDS( pclt_fields, pclt ) )
|
|
|
1185 |
goto Exit;
|
|
|
1186 |
|
|
|
1187 |
Exit:
|
|
|
1188 |
return error;
|
|
|
1189 |
}
|
|
|
1190 |
|
|
|
1191 |
|
|
|
1192 |
/*************************************************************************/
|
|
|
1193 |
/* */
|
|
|
1194 |
/* <Function> */
|
|
|
1195 |
/* tt_face_load_gasp */
|
|
|
1196 |
/* */
|
|
|
1197 |
/* <Description> */
|
|
|
1198 |
/* Loads the `gasp' table into a face object. */
|
|
|
1199 |
/* */
|
|
|
1200 |
/* <Input> */
|
|
|
1201 |
/* face :: A handle to the target face object. */
|
|
|
1202 |
/* */
|
|
|
1203 |
/* stream :: The input stream. */
|
|
|
1204 |
/* */
|
|
|
1205 |
/* <Return> */
|
|
|
1206 |
/* FreeType error code. 0 means success. */
|
|
|
1207 |
/* */
|
|
|
1208 |
FT_LOCAL_DEF( FT_Error )
|
|
|
1209 |
tt_face_load_gasp( TT_Face face,
|
|
|
1210 |
FT_Stream stream )
|
|
|
1211 |
{
|
|
|
1212 |
FT_Error error;
|
|
|
1213 |
FT_Memory memory = stream->memory;
|
|
|
1214 |
|
|
|
1215 |
FT_UInt j,num_ranges;
|
|
|
1216 |
TT_GaspRange gaspranges;
|
|
|
1217 |
|
|
|
1218 |
|
|
|
1219 |
/* the gasp table is optional */
|
|
|
1220 |
error = face->goto_table( face, TTAG_gasp, stream, 0 );
|
|
|
1221 |
if ( error )
|
|
|
1222 |
goto Exit;
|
|
|
1223 |
|
|
|
1224 |
if ( FT_FRAME_ENTER( 4L ) )
|
|
|
1225 |
goto Exit;
|
|
|
1226 |
|
|
|
1227 |
face->gasp.version = FT_GET_USHORT();
|
|
|
1228 |
face->gasp.numRanges = FT_GET_USHORT();
|
|
|
1229 |
|
|
|
1230 |
FT_FRAME_EXIT();
|
|
|
1231 |
|
|
|
1232 |
/* only support versions 0 and 1 of the table */
|
|
|
1233 |
if ( face->gasp.version >= 2 )
|
|
|
1234 |
{
|
|
|
1235 |
face->gasp.numRanges = 0;
|
|
|
1236 |
error = SFNT_Err_Invalid_Table;
|
|
|
1237 |
goto Exit;
|
|
|
1238 |
}
|
|
|
1239 |
|
|
|
1240 |
num_ranges = face->gasp.numRanges;
|
|
|
1241 |
FT_TRACE3(( "numRanges: %u\n", num_ranges ));
|
|
|
1242 |
|
|
|
1243 |
if ( FT_QNEW_ARRAY( gaspranges, num_ranges ) ||
|
|
|
1244 |
FT_FRAME_ENTER( num_ranges * 4L ) )
|
|
|
1245 |
goto Exit;
|
|
|
1246 |
|
|
|
1247 |
face->gasp.gaspRanges = gaspranges;
|
|
|
1248 |
|
|
|
1249 |
for ( j = 0; j < num_ranges; j++ )
|
|
|
1250 |
{
|
|
|
1251 |
gaspranges[j].maxPPEM = FT_GET_USHORT();
|
|
|
1252 |
gaspranges[j].gaspFlag = FT_GET_USHORT();
|
|
|
1253 |
|
|
|
1254 |
FT_TRACE3(( "gaspRange %d: rangeMaxPPEM %5d, rangeGaspBehavior 0x%x\n",
|
|
|
1255 |
j,
|
|
|
1256 |
gaspranges[j].maxPPEM,
|
|
|
1257 |
gaspranges[j].gaspFlag ));
|
|
|
1258 |
}
|
|
|
1259 |
|
|
|
1260 |
FT_FRAME_EXIT();
|
|
|
1261 |
|
|
|
1262 |
Exit:
|
|
|
1263 |
return error;
|
|
|
1264 |
}
|
|
|
1265 |
|
|
|
1266 |
|
|
|
1267 |
/* END */
|