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54876
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/****************************************************************************
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*
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* ttsbit.c
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4 |
*
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5 |
* TrueType and OpenType embedded bitmap support (body).
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6 |
*
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7 |
* Copyright (C) 2005-2019 by
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* David Turner, Robert Wilhelm, and Werner Lemberg.
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*
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* Copyright 2013 by Google, Inc.
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* Google Author(s): Behdad Esfahbod.
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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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* 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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49234
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20 |
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21 |
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22 |
#include <ft2build.h>
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23 |
#include FT_INTERNAL_DEBUG_H
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24 |
#include FT_INTERNAL_STREAM_H
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25 |
#include FT_TRUETYPE_TAGS_H
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26 |
#include FT_BITMAP_H
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27 |
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28 |
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29 |
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
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30 |
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31 |
#include "ttsbit.h"
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32 |
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33 |
#include "sferrors.h"
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34 |
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35 |
#include "ttmtx.h"
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#include "pngshim.h"
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38 |
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54876
|
39 |
/**************************************************************************
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40 |
*
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41 |
* The macro FT_COMPONENT is used in trace mode. It is an implicit
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42 |
* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
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43 |
* messages during execution.
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44 |
*/
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49234
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45 |
#undef FT_COMPONENT
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54876
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46 |
#define FT_COMPONENT ttsbit
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49234
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47 |
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48 |
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49 |
FT_LOCAL_DEF( FT_Error )
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50 |
tt_face_load_sbit( TT_Face face,
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51 |
FT_Stream stream )
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52 |
{
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53 |
FT_Error error;
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54 |
FT_ULong table_size;
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55 |
FT_ULong table_start;
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56 |
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57 |
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58 |
face->sbit_table = NULL;
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59 |
face->sbit_table_size = 0;
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60 |
face->sbit_table_type = TT_SBIT_TABLE_TYPE_NONE;
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61 |
face->sbit_num_strikes = 0;
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62 |
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63 |
error = face->goto_table( face, TTAG_CBLC, stream, &table_size );
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64 |
if ( !error )
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65 |
face->sbit_table_type = TT_SBIT_TABLE_TYPE_CBLC;
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66 |
else
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67 |
{
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68 |
error = face->goto_table( face, TTAG_EBLC, stream, &table_size );
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69 |
if ( error )
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70 |
error = face->goto_table( face, TTAG_bloc, stream, &table_size );
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71 |
if ( !error )
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72 |
face->sbit_table_type = TT_SBIT_TABLE_TYPE_EBLC;
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73 |
}
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74 |
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75 |
if ( error )
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76 |
{
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77 |
error = face->goto_table( face, TTAG_sbix, stream, &table_size );
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78 |
if ( !error )
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79 |
face->sbit_table_type = TT_SBIT_TABLE_TYPE_SBIX;
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80 |
}
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if ( error )
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goto Exit;
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83 |
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84 |
if ( table_size < 8 )
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85 |
{
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86 |
FT_ERROR(( "tt_face_load_sbit_strikes: table too short\n" ));
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87 |
error = FT_THROW( Invalid_File_Format );
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88 |
goto Exit;
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89 |
}
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90 |
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91 |
table_start = FT_STREAM_POS();
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92 |
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93 |
switch ( (FT_UInt)face->sbit_table_type )
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94 |
{
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95 |
case TT_SBIT_TABLE_TYPE_EBLC:
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96 |
case TT_SBIT_TABLE_TYPE_CBLC:
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97 |
{
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98 |
FT_Byte* p;
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99 |
FT_Fixed version;
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100 |
FT_ULong num_strikes;
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101 |
FT_UInt count;
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102 |
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103 |
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104 |
if ( FT_FRAME_EXTRACT( table_size, face->sbit_table ) )
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105 |
goto Exit;
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106 |
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107 |
face->sbit_table_size = table_size;
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108 |
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109 |
p = face->sbit_table;
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110 |
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111 |
version = FT_NEXT_LONG( p );
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112 |
num_strikes = FT_NEXT_ULONG( p );
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113 |
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114 |
/* there's at least one font (FZShuSong-Z01, version 3) */
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115 |
/* that uses the wrong byte order for the `version' field */
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116 |
if ( ( (FT_ULong)version & 0xFFFF0000UL ) != 0x00020000UL &&
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117 |
( (FT_ULong)version & 0x0000FFFFUL ) != 0x00000200UL &&
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118 |
( (FT_ULong)version & 0xFFFF0000UL ) != 0x00030000UL &&
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119 |
( (FT_ULong)version & 0x0000FFFFUL ) != 0x00000300UL )
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120 |
{
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121 |
error = FT_THROW( Unknown_File_Format );
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122 |
goto Exit;
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123 |
}
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124 |
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125 |
if ( num_strikes >= 0x10000UL )
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126 |
{
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127 |
error = FT_THROW( Invalid_File_Format );
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128 |
goto Exit;
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129 |
}
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130 |
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131 |
/*
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54876
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132 |
* Count the number of strikes available in the table. We are a bit
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133 |
* paranoid there and don't trust the data.
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49234
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134 |
*/
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135 |
count = (FT_UInt)num_strikes;
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136 |
if ( 8 + 48UL * count > table_size )
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137 |
count = (FT_UInt)( ( table_size - 8 ) / 48 );
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138 |
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139 |
face->sbit_num_strikes = count;
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140 |
}
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141 |
break;
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142 |
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143 |
case TT_SBIT_TABLE_TYPE_SBIX:
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144 |
{
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145 |
FT_UShort version;
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146 |
FT_UShort flags;
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147 |
FT_ULong num_strikes;
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148 |
FT_UInt count;
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149 |
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150 |
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151 |
if ( FT_FRAME_ENTER( 8 ) )
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152 |
goto Exit;
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153 |
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154 |
version = FT_GET_USHORT();
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155 |
flags = FT_GET_USHORT();
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156 |
num_strikes = FT_GET_ULONG();
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157 |
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158 |
FT_FRAME_EXIT();
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159 |
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160 |
if ( version < 1 )
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161 |
{
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162 |
error = FT_THROW( Unknown_File_Format );
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163 |
goto Exit;
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164 |
}
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165 |
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166 |
/* Bit 0 must always be `1'. */
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167 |
/* Bit 1 controls the overlay of bitmaps with outlines. */
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168 |
/* All other bits should be zero. */
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169 |
if ( !( flags == 1 || flags == 3 ) ||
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170 |
num_strikes >= 0x10000UL )
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171 |
{
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172 |
error = FT_THROW( Invalid_File_Format );
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173 |
goto Exit;
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174 |
}
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175 |
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176 |
/* we currently don't support bit 1; however, it is better to */
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177 |
/* draw at least something... */
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178 |
if ( flags == 3 )
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179 |
FT_TRACE1(( "tt_face_load_sbit_strikes:"
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180 |
" sbix overlay not supported yet\n"
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181 |
" "
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182 |
" expect bad rendering results\n" ));
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183 |
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184 |
/*
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54876
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185 |
* Count the number of strikes available in the table. We are a bit
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186 |
* paranoid there and don't trust the data.
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49234
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187 |
*/
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188 |
count = (FT_UInt)num_strikes;
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189 |
if ( 8 + 4UL * count > table_size )
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190 |
count = (FT_UInt)( ( table_size - 8 ) / 4 );
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191 |
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192 |
if ( FT_STREAM_SEEK( FT_STREAM_POS() - 8 ) )
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193 |
goto Exit;
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194 |
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195 |
face->sbit_table_size = 8 + count * 4;
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196 |
if ( FT_FRAME_EXTRACT( face->sbit_table_size, face->sbit_table ) )
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197 |
goto Exit;
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198 |
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199 |
face->sbit_num_strikes = count;
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200 |
}
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201 |
break;
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202 |
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203 |
default:
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204 |
/* we ignore unknown table formats */
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205 |
error = FT_THROW( Unknown_File_Format );
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206 |
break;
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207 |
}
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208 |
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209 |
if ( !error )
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210 |
FT_TRACE3(( "tt_face_load_sbit_strikes: found %u strikes\n",
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211 |
face->sbit_num_strikes ));
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212 |
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213 |
face->ebdt_start = 0;
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214 |
face->ebdt_size = 0;
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215 |
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216 |
if ( face->sbit_table_type == TT_SBIT_TABLE_TYPE_SBIX )
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217 |
{
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218 |
/* the `sbix' table is self-contained; */
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219 |
/* it has no associated data table */
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220 |
face->ebdt_start = table_start;
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221 |
face->ebdt_size = table_size;
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222 |
}
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223 |
else if ( face->sbit_table_type != TT_SBIT_TABLE_TYPE_NONE )
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224 |
{
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225 |
FT_ULong ebdt_size;
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226 |
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227 |
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228 |
error = face->goto_table( face, TTAG_CBDT, stream, &ebdt_size );
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229 |
if ( error )
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230 |
error = face->goto_table( face, TTAG_EBDT, stream, &ebdt_size );
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231 |
if ( error )
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232 |
error = face->goto_table( face, TTAG_bdat, stream, &ebdt_size );
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233 |
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|
234 |
if ( !error )
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235 |
{
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236 |
face->ebdt_start = FT_STREAM_POS();
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237 |
face->ebdt_size = ebdt_size;
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238 |
}
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239 |
}
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240 |
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241 |
if ( !face->ebdt_size )
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242 |
{
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243 |
FT_TRACE2(( "tt_face_load_sbit_strikes:"
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244 |
" no embedded bitmap data table found;\n"
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245 |
" "
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246 |
" resetting number of strikes to zero\n" ));
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247 |
face->sbit_num_strikes = 0;
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|
248 |
}
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249 |
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|
250 |
return FT_Err_Ok;
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|
251 |
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252 |
Exit:
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|
253 |
if ( error )
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254 |
{
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255 |
if ( face->sbit_table )
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256 |
FT_FRAME_RELEASE( face->sbit_table );
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257 |
face->sbit_table_size = 0;
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258 |
face->sbit_table_type = TT_SBIT_TABLE_TYPE_NONE;
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259 |
}
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260 |
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261 |
return error;
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262 |
}
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263 |
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264 |
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265 |
FT_LOCAL_DEF( void )
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266 |
tt_face_free_sbit( TT_Face face )
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|
267 |
{
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|
268 |
FT_Stream stream = face->root.stream;
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269 |
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|
270 |
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271 |
FT_FRAME_RELEASE( face->sbit_table );
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272 |
face->sbit_table_size = 0;
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273 |
face->sbit_table_type = TT_SBIT_TABLE_TYPE_NONE;
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274 |
face->sbit_num_strikes = 0;
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275 |
}
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|
276 |
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277 |
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278 |
FT_LOCAL_DEF( FT_Error )
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279 |
tt_face_set_sbit_strike( TT_Face face,
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280 |
FT_Size_Request req,
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281 |
FT_ULong* astrike_index )
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|
282 |
{
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283 |
return FT_Match_Size( (FT_Face)face, req, 0, astrike_index );
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|
284 |
}
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285 |
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286 |
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287 |
FT_LOCAL_DEF( FT_Error )
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|
288 |
tt_face_load_strike_metrics( TT_Face face,
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|
289 |
FT_ULong strike_index,
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|
290 |
FT_Size_Metrics* metrics )
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|
291 |
{
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|
292 |
/* we have to test for the existence of `sbit_strike_map' */
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|
293 |
/* because the function gets also used at the very beginning */
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|
294 |
/* to construct `sbit_strike_map' itself */
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|
295 |
if ( face->sbit_strike_map )
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|
296 |
{
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|
297 |
if ( strike_index >= (FT_ULong)face->root.num_fixed_sizes )
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|
298 |
return FT_THROW( Invalid_Argument );
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|
299 |
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|
300 |
/* map to real index */
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|
301 |
strike_index = face->sbit_strike_map[strike_index];
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|
302 |
}
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|
303 |
else
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|
304 |
{
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|
305 |
if ( strike_index >= (FT_ULong)face->sbit_num_strikes )
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|
306 |
return FT_THROW( Invalid_Argument );
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|
307 |
}
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|
308 |
|
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|
309 |
switch ( (FT_UInt)face->sbit_table_type )
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|
310 |
{
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|
|
311 |
case TT_SBIT_TABLE_TYPE_EBLC:
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|
312 |
case TT_SBIT_TABLE_TYPE_CBLC:
|
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|
313 |
{
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|
|
314 |
FT_Byte* strike;
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|
315 |
FT_Char max_before_bl;
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|
316 |
FT_Char min_after_bl;
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|
317 |
|
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|
318 |
|
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|
319 |
strike = face->sbit_table + 8 + strike_index * 48;
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|
320 |
|
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|
321 |
metrics->x_ppem = (FT_UShort)strike[44];
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|
322 |
metrics->y_ppem = (FT_UShort)strike[45];
|
|
|
323 |
|
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|
324 |
metrics->ascender = (FT_Char)strike[16] * 64; /* hori.ascender */
|
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|
325 |
metrics->descender = (FT_Char)strike[17] * 64; /* hori.descender */
|
|
|
326 |
|
|
|
327 |
/* Due to fuzzy wording in the EBLC documentation, we find both */
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|
|
328 |
/* positive and negative values for `descender'. Additionally, */
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|
|
329 |
/* many fonts have both `ascender' and `descender' set to zero */
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|
|
330 |
/* (which is definitely wrong). MS Windows simply ignores all */
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|
|
331 |
/* those values... For these reasons we apply some heuristics */
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|
|
332 |
/* to get a reasonable, non-zero value for the height. */
|
|
|
333 |
|
|
|
334 |
max_before_bl = (FT_Char)strike[24];
|
|
|
335 |
min_after_bl = (FT_Char)strike[25];
|
|
|
336 |
|
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|
337 |
if ( metrics->descender > 0 )
|
|
|
338 |
{
|
|
|
339 |
/* compare sign of descender with `min_after_bl' */
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|
340 |
if ( min_after_bl < 0 )
|
|
|
341 |
metrics->descender = -metrics->descender;
|
|
|
342 |
}
|
|
|
343 |
|
|
|
344 |
else if ( metrics->descender == 0 )
|
|
|
345 |
{
|
|
|
346 |
if ( metrics->ascender == 0 )
|
|
|
347 |
{
|
|
|
348 |
FT_TRACE2(( "tt_face_load_strike_metrics:"
|
|
|
349 |
" sanitizing invalid ascender and descender\n"
|
|
|
350 |
" "
|
|
|
351 |
" values for strike %d (%dppem, %dppem)\n",
|
|
|
352 |
strike_index,
|
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|
353 |
metrics->x_ppem, metrics->y_ppem ));
|
|
|
354 |
|
|
|
355 |
/* sanitize buggy ascender and descender values */
|
|
|
356 |
if ( max_before_bl || min_after_bl )
|
|
|
357 |
{
|
|
|
358 |
metrics->ascender = max_before_bl * 64;
|
|
|
359 |
metrics->descender = min_after_bl * 64;
|
|
|
360 |
}
|
|
|
361 |
else
|
|
|
362 |
{
|
|
|
363 |
metrics->ascender = metrics->y_ppem * 64;
|
|
|
364 |
metrics->descender = 0;
|
|
|
365 |
}
|
|
|
366 |
}
|
|
|
367 |
}
|
|
|
368 |
|
|
|
369 |
#if 0
|
|
|
370 |
else
|
|
|
371 |
; /* if we have a negative descender, simply use it */
|
|
|
372 |
#endif
|
|
|
373 |
|
|
|
374 |
metrics->height = metrics->ascender - metrics->descender;
|
|
|
375 |
if ( metrics->height == 0 )
|
|
|
376 |
{
|
|
|
377 |
FT_TRACE2(( "tt_face_load_strike_metrics:"
|
|
|
378 |
" sanitizing invalid height value\n"
|
|
|
379 |
" "
|
|
|
380 |
" for strike (%d, %d)\n",
|
|
|
381 |
metrics->x_ppem, metrics->y_ppem ));
|
|
|
382 |
metrics->height = metrics->y_ppem * 64;
|
|
|
383 |
metrics->descender = metrics->ascender - metrics->height;
|
|
|
384 |
}
|
|
|
385 |
|
|
|
386 |
/* Is this correct? */
|
|
|
387 |
metrics->max_advance = ( (FT_Char)strike[22] + /* min_origin_SB */
|
|
|
388 |
strike[18] + /* max_width */
|
|
|
389 |
(FT_Char)strike[23] /* min_advance_SB */
|
|
|
390 |
) * 64;
|
|
|
391 |
|
|
|
392 |
/* set the scale values (in 16.16 units) so advances */
|
|
|
393 |
/* from the hmtx and vmtx table are scaled correctly */
|
|
|
394 |
metrics->x_scale = FT_MulDiv( metrics->x_ppem,
|
|
|
395 |
64 * 0x10000,
|
|
|
396 |
face->header.Units_Per_EM );
|
|
|
397 |
metrics->y_scale = FT_MulDiv( metrics->y_ppem,
|
|
|
398 |
64 * 0x10000,
|
|
|
399 |
face->header.Units_Per_EM );
|
|
|
400 |
|
|
|
401 |
return FT_Err_Ok;
|
|
|
402 |
}
|
|
|
403 |
|
|
|
404 |
case TT_SBIT_TABLE_TYPE_SBIX:
|
|
|
405 |
{
|
|
|
406 |
FT_Stream stream = face->root.stream;
|
|
|
407 |
FT_UInt offset;
|
|
|
408 |
FT_UShort upem, ppem, resolution;
|
|
|
409 |
TT_HoriHeader *hori;
|
|
|
410 |
FT_Pos ppem_; /* to reduce casts */
|
|
|
411 |
|
|
|
412 |
FT_Error error;
|
|
|
413 |
FT_Byte* p;
|
|
|
414 |
|
|
|
415 |
|
|
|
416 |
p = face->sbit_table + 8 + 4 * strike_index;
|
|
|
417 |
offset = FT_NEXT_ULONG( p );
|
|
|
418 |
|
|
|
419 |
if ( offset + 4 > face->ebdt_size )
|
|
|
420 |
return FT_THROW( Invalid_File_Format );
|
|
|
421 |
|
|
|
422 |
if ( FT_STREAM_SEEK( face->ebdt_start + offset ) ||
|
|
|
423 |
FT_FRAME_ENTER( 4 ) )
|
|
|
424 |
return error;
|
|
|
425 |
|
|
|
426 |
ppem = FT_GET_USHORT();
|
|
|
427 |
resolution = FT_GET_USHORT();
|
|
|
428 |
|
|
|
429 |
FT_UNUSED( resolution ); /* What to do with this? */
|
|
|
430 |
|
|
|
431 |
FT_FRAME_EXIT();
|
|
|
432 |
|
|
|
433 |
upem = face->header.Units_Per_EM;
|
|
|
434 |
hori = &face->horizontal;
|
|
|
435 |
|
|
|
436 |
metrics->x_ppem = ppem;
|
|
|
437 |
metrics->y_ppem = ppem;
|
|
|
438 |
|
|
|
439 |
ppem_ = (FT_Pos)ppem;
|
|
|
440 |
|
|
|
441 |
metrics->ascender =
|
|
|
442 |
FT_MulDiv( hori->Ascender, ppem_ * 64, upem );
|
|
|
443 |
metrics->descender =
|
|
|
444 |
FT_MulDiv( hori->Descender, ppem_ * 64, upem );
|
|
|
445 |
metrics->height =
|
|
|
446 |
FT_MulDiv( hori->Ascender - hori->Descender + hori->Line_Gap,
|
|
|
447 |
ppem_ * 64, upem );
|
|
|
448 |
metrics->max_advance =
|
|
|
449 |
FT_MulDiv( hori->advance_Width_Max, ppem_ * 64, upem );
|
|
|
450 |
|
|
|
451 |
/* set the scale values (in 16.16 units) so advances */
|
|
|
452 |
/* from the hmtx and vmtx table are scaled correctly */
|
|
|
453 |
metrics->x_scale = FT_MulDiv( metrics->x_ppem,
|
|
|
454 |
64 * 0x10000,
|
|
|
455 |
face->header.Units_Per_EM );
|
|
|
456 |
metrics->y_scale = FT_MulDiv( metrics->y_ppem,
|
|
|
457 |
64 * 0x10000,
|
|
|
458 |
face->header.Units_Per_EM );
|
|
|
459 |
|
|
|
460 |
return error;
|
|
|
461 |
}
|
|
|
462 |
|
|
|
463 |
default:
|
|
|
464 |
return FT_THROW( Unknown_File_Format );
|
|
|
465 |
}
|
|
|
466 |
}
|
|
|
467 |
|
|
|
468 |
|
|
|
469 |
typedef struct TT_SBitDecoderRec_
|
|
|
470 |
{
|
|
|
471 |
TT_Face face;
|
|
|
472 |
FT_Stream stream;
|
|
|
473 |
FT_Bitmap* bitmap;
|
|
|
474 |
TT_SBit_Metrics metrics;
|
|
|
475 |
FT_Bool metrics_loaded;
|
|
|
476 |
FT_Bool bitmap_allocated;
|
|
|
477 |
FT_Byte bit_depth;
|
|
|
478 |
|
|
|
479 |
FT_ULong ebdt_start;
|
|
|
480 |
FT_ULong ebdt_size;
|
|
|
481 |
|
|
|
482 |
FT_ULong strike_index_array;
|
|
|
483 |
FT_ULong strike_index_count;
|
|
|
484 |
FT_Byte* eblc_base;
|
|
|
485 |
FT_Byte* eblc_limit;
|
|
|
486 |
|
|
|
487 |
} TT_SBitDecoderRec, *TT_SBitDecoder;
|
|
|
488 |
|
|
|
489 |
|
|
|
490 |
static FT_Error
|
|
|
491 |
tt_sbit_decoder_init( TT_SBitDecoder decoder,
|
|
|
492 |
TT_Face face,
|
|
|
493 |
FT_ULong strike_index,
|
|
|
494 |
TT_SBit_MetricsRec* metrics )
|
|
|
495 |
{
|
|
|
496 |
FT_Error error = FT_ERR( Table_Missing );
|
|
|
497 |
FT_Stream stream = face->root.stream;
|
|
|
498 |
|
|
|
499 |
|
|
|
500 |
strike_index = face->sbit_strike_map[strike_index];
|
|
|
501 |
|
|
|
502 |
if ( !face->ebdt_size )
|
|
|
503 |
goto Exit;
|
|
|
504 |
if ( FT_STREAM_SEEK( face->ebdt_start ) )
|
|
|
505 |
goto Exit;
|
|
|
506 |
|
|
|
507 |
decoder->face = face;
|
|
|
508 |
decoder->stream = stream;
|
|
|
509 |
decoder->bitmap = &face->root.glyph->bitmap;
|
|
|
510 |
decoder->metrics = metrics;
|
|
|
511 |
|
|
|
512 |
decoder->metrics_loaded = 0;
|
|
|
513 |
decoder->bitmap_allocated = 0;
|
|
|
514 |
|
|
|
515 |
decoder->ebdt_start = face->ebdt_start;
|
|
|
516 |
decoder->ebdt_size = face->ebdt_size;
|
|
|
517 |
|
|
|
518 |
decoder->eblc_base = face->sbit_table;
|
|
|
519 |
decoder->eblc_limit = face->sbit_table + face->sbit_table_size;
|
|
|
520 |
|
|
|
521 |
/* now find the strike corresponding to the index */
|
|
|
522 |
{
|
|
|
523 |
FT_Byte* p;
|
|
|
524 |
|
|
|
525 |
|
|
|
526 |
if ( 8 + 48 * strike_index + 3 * 4 + 34 + 1 > face->sbit_table_size )
|
|
|
527 |
{
|
|
|
528 |
error = FT_THROW( Invalid_File_Format );
|
|
|
529 |
goto Exit;
|
|
|
530 |
}
|
|
|
531 |
|
|
|
532 |
p = decoder->eblc_base + 8 + 48 * strike_index;
|
|
|
533 |
|
|
|
534 |
decoder->strike_index_array = FT_NEXT_ULONG( p );
|
|
|
535 |
p += 4;
|
|
|
536 |
decoder->strike_index_count = FT_NEXT_ULONG( p );
|
|
|
537 |
p += 34;
|
|
|
538 |
decoder->bit_depth = *p;
|
|
|
539 |
|
|
|
540 |
/* decoder->strike_index_array + */
|
|
|
541 |
/* 8 * decoder->strike_index_count > face->sbit_table_size ? */
|
|
|
542 |
if ( decoder->strike_index_array > face->sbit_table_size ||
|
|
|
543 |
decoder->strike_index_count >
|
|
|
544 |
( face->sbit_table_size - decoder->strike_index_array ) / 8 )
|
|
|
545 |
error = FT_THROW( Invalid_File_Format );
|
|
|
546 |
}
|
|
|
547 |
|
|
|
548 |
Exit:
|
|
|
549 |
return error;
|
|
|
550 |
}
|
|
|
551 |
|
|
|
552 |
|
|
|
553 |
static void
|
|
|
554 |
tt_sbit_decoder_done( TT_SBitDecoder decoder )
|
|
|
555 |
{
|
|
|
556 |
FT_UNUSED( decoder );
|
|
|
557 |
}
|
|
|
558 |
|
|
|
559 |
|
|
|
560 |
static FT_Error
|
|
|
561 |
tt_sbit_decoder_alloc_bitmap( TT_SBitDecoder decoder,
|
|
|
562 |
FT_Bool metrics_only )
|
|
|
563 |
{
|
|
|
564 |
FT_Error error = FT_Err_Ok;
|
|
|
565 |
FT_UInt width, height;
|
|
|
566 |
FT_Bitmap* map = decoder->bitmap;
|
|
|
567 |
FT_ULong size;
|
|
|
568 |
|
|
|
569 |
|
|
|
570 |
if ( !decoder->metrics_loaded )
|
|
|
571 |
{
|
|
|
572 |
error = FT_THROW( Invalid_Argument );
|
|
|
573 |
goto Exit;
|
|
|
574 |
}
|
|
|
575 |
|
|
|
576 |
width = decoder->metrics->width;
|
|
|
577 |
height = decoder->metrics->height;
|
|
|
578 |
|
|
|
579 |
map->width = width;
|
|
|
580 |
map->rows = height;
|
|
|
581 |
|
|
|
582 |
switch ( decoder->bit_depth )
|
|
|
583 |
{
|
|
|
584 |
case 1:
|
|
|
585 |
map->pixel_mode = FT_PIXEL_MODE_MONO;
|
|
|
586 |
map->pitch = (int)( ( map->width + 7 ) >> 3 );
|
|
|
587 |
map->num_grays = 2;
|
|
|
588 |
break;
|
|
|
589 |
|
|
|
590 |
case 2:
|
|
|
591 |
map->pixel_mode = FT_PIXEL_MODE_GRAY2;
|
|
|
592 |
map->pitch = (int)( ( map->width + 3 ) >> 2 );
|
|
|
593 |
map->num_grays = 4;
|
|
|
594 |
break;
|
|
|
595 |
|
|
|
596 |
case 4:
|
|
|
597 |
map->pixel_mode = FT_PIXEL_MODE_GRAY4;
|
|
|
598 |
map->pitch = (int)( ( map->width + 1 ) >> 1 );
|
|
|
599 |
map->num_grays = 16;
|
|
|
600 |
break;
|
|
|
601 |
|
|
|
602 |
case 8:
|
|
|
603 |
map->pixel_mode = FT_PIXEL_MODE_GRAY;
|
|
|
604 |
map->pitch = (int)( map->width );
|
|
|
605 |
map->num_grays = 256;
|
|
|
606 |
break;
|
|
|
607 |
|
|
|
608 |
case 32:
|
|
|
609 |
map->pixel_mode = FT_PIXEL_MODE_BGRA;
|
|
|
610 |
map->pitch = (int)( map->width * 4 );
|
|
|
611 |
map->num_grays = 256;
|
|
|
612 |
break;
|
|
|
613 |
|
|
|
614 |
default:
|
|
|
615 |
error = FT_THROW( Invalid_File_Format );
|
|
|
616 |
goto Exit;
|
|
|
617 |
}
|
|
|
618 |
|
|
|
619 |
size = map->rows * (FT_ULong)map->pitch;
|
|
|
620 |
|
|
|
621 |
/* check that there is no empty image */
|
|
|
622 |
if ( size == 0 )
|
|
|
623 |
goto Exit; /* exit successfully! */
|
|
|
624 |
|
|
|
625 |
if ( metrics_only )
|
|
|
626 |
goto Exit; /* only metrics are requested */
|
|
|
627 |
|
|
|
628 |
error = ft_glyphslot_alloc_bitmap( decoder->face->root.glyph, size );
|
|
|
629 |
if ( error )
|
|
|
630 |
goto Exit;
|
|
|
631 |
|
|
|
632 |
decoder->bitmap_allocated = 1;
|
|
|
633 |
|
|
|
634 |
Exit:
|
|
|
635 |
return error;
|
|
|
636 |
}
|
|
|
637 |
|
|
|
638 |
|
|
|
639 |
static FT_Error
|
|
|
640 |
tt_sbit_decoder_load_metrics( TT_SBitDecoder decoder,
|
|
|
641 |
FT_Byte* *pp,
|
|
|
642 |
FT_Byte* limit,
|
|
|
643 |
FT_Bool big )
|
|
|
644 |
{
|
|
|
645 |
FT_Byte* p = *pp;
|
|
|
646 |
TT_SBit_Metrics metrics = decoder->metrics;
|
|
|
647 |
|
|
|
648 |
|
|
|
649 |
if ( p + 5 > limit )
|
|
|
650 |
goto Fail;
|
|
|
651 |
|
|
|
652 |
metrics->height = p[0];
|
|
|
653 |
metrics->width = p[1];
|
|
|
654 |
metrics->horiBearingX = (FT_Char)p[2];
|
|
|
655 |
metrics->horiBearingY = (FT_Char)p[3];
|
|
|
656 |
metrics->horiAdvance = p[4];
|
|
|
657 |
|
|
|
658 |
p += 5;
|
|
|
659 |
if ( big )
|
|
|
660 |
{
|
|
|
661 |
if ( p + 3 > limit )
|
|
|
662 |
goto Fail;
|
|
|
663 |
|
|
|
664 |
metrics->vertBearingX = (FT_Char)p[0];
|
|
|
665 |
metrics->vertBearingY = (FT_Char)p[1];
|
|
|
666 |
metrics->vertAdvance = p[2];
|
|
|
667 |
|
|
|
668 |
p += 3;
|
|
|
669 |
}
|
|
|
670 |
else
|
|
|
671 |
{
|
|
|
672 |
/* avoid uninitialized data in case there is no vertical info -- */
|
|
|
673 |
metrics->vertBearingX = 0;
|
|
|
674 |
metrics->vertBearingY = 0;
|
|
|
675 |
metrics->vertAdvance = 0;
|
|
|
676 |
}
|
|
|
677 |
|
|
|
678 |
decoder->metrics_loaded = 1;
|
|
|
679 |
*pp = p;
|
|
|
680 |
return FT_Err_Ok;
|
|
|
681 |
|
|
|
682 |
Fail:
|
|
|
683 |
FT_TRACE1(( "tt_sbit_decoder_load_metrics: broken table\n" ));
|
|
|
684 |
return FT_THROW( Invalid_Argument );
|
|
|
685 |
}
|
|
|
686 |
|
|
|
687 |
|
|
|
688 |
/* forward declaration */
|
|
|
689 |
static FT_Error
|
|
|
690 |
tt_sbit_decoder_load_image( TT_SBitDecoder decoder,
|
|
|
691 |
FT_UInt glyph_index,
|
|
|
692 |
FT_Int x_pos,
|
|
|
693 |
FT_Int y_pos,
|
|
|
694 |
FT_UInt recurse_count,
|
|
|
695 |
FT_Bool metrics_only );
|
|
|
696 |
|
|
|
697 |
typedef FT_Error (*TT_SBitDecoder_LoadFunc)(
|
|
|
698 |
TT_SBitDecoder decoder,
|
|
|
699 |
FT_Byte* p,
|
|
|
700 |
FT_Byte* plimit,
|
|
|
701 |
FT_Int x_pos,
|
|
|
702 |
FT_Int y_pos,
|
|
|
703 |
FT_UInt recurse_count );
|
|
|
704 |
|
|
|
705 |
|
|
|
706 |
static FT_Error
|
|
|
707 |
tt_sbit_decoder_load_byte_aligned( TT_SBitDecoder decoder,
|
|
|
708 |
FT_Byte* p,
|
|
|
709 |
FT_Byte* limit,
|
|
|
710 |
FT_Int x_pos,
|
|
|
711 |
FT_Int y_pos,
|
|
|
712 |
FT_UInt recurse_count )
|
|
|
713 |
{
|
|
|
714 |
FT_Error error = FT_Err_Ok;
|
|
|
715 |
FT_Byte* line;
|
|
|
716 |
FT_Int pitch, width, height, line_bits, h;
|
|
|
717 |
FT_UInt bit_height, bit_width;
|
|
|
718 |
FT_Bitmap* bitmap;
|
|
|
719 |
|
|
|
720 |
FT_UNUSED( recurse_count );
|
|
|
721 |
|
|
|
722 |
|
|
|
723 |
/* check that we can write the glyph into the bitmap */
|
|
|
724 |
bitmap = decoder->bitmap;
|
|
|
725 |
bit_width = bitmap->width;
|
|
|
726 |
bit_height = bitmap->rows;
|
|
|
727 |
pitch = bitmap->pitch;
|
|
|
728 |
line = bitmap->buffer;
|
|
|
729 |
|
|
|
730 |
width = decoder->metrics->width;
|
|
|
731 |
height = decoder->metrics->height;
|
|
|
732 |
|
|
|
733 |
line_bits = width * decoder->bit_depth;
|
|
|
734 |
|
|
|
735 |
if ( x_pos < 0 || (FT_UInt)( x_pos + width ) > bit_width ||
|
|
|
736 |
y_pos < 0 || (FT_UInt)( y_pos + height ) > bit_height )
|
|
|
737 |
{
|
|
|
738 |
FT_TRACE1(( "tt_sbit_decoder_load_byte_aligned:"
|
|
|
739 |
" invalid bitmap dimensions\n" ));
|
|
|
740 |
error = FT_THROW( Invalid_File_Format );
|
|
|
741 |
goto Exit;
|
|
|
742 |
}
|
|
|
743 |
|
|
|
744 |
if ( p + ( ( line_bits + 7 ) >> 3 ) * height > limit )
|
|
|
745 |
{
|
|
|
746 |
FT_TRACE1(( "tt_sbit_decoder_load_byte_aligned: broken bitmap\n" ));
|
|
|
747 |
error = FT_THROW( Invalid_File_Format );
|
|
|
748 |
goto Exit;
|
|
|
749 |
}
|
|
|
750 |
|
|
|
751 |
/* now do the blit */
|
|
|
752 |
line += y_pos * pitch + ( x_pos >> 3 );
|
|
|
753 |
x_pos &= 7;
|
|
|
754 |
|
|
|
755 |
if ( x_pos == 0 ) /* the easy one */
|
|
|
756 |
{
|
|
|
757 |
for ( h = height; h > 0; h--, line += pitch )
|
|
|
758 |
{
|
|
|
759 |
FT_Byte* pwrite = line;
|
|
|
760 |
FT_Int w;
|
|
|
761 |
|
|
|
762 |
|
|
|
763 |
for ( w = line_bits; w >= 8; w -= 8 )
|
|
|
764 |
{
|
|
|
765 |
pwrite[0] = (FT_Byte)( pwrite[0] | *p++ );
|
|
|
766 |
pwrite += 1;
|
|
|
767 |
}
|
|
|
768 |
|
|
|
769 |
if ( w > 0 )
|
|
|
770 |
pwrite[0] = (FT_Byte)( pwrite[0] | ( *p++ & ( 0xFF00U >> w ) ) );
|
|
|
771 |
}
|
|
|
772 |
}
|
|
|
773 |
else /* x_pos > 0 */
|
|
|
774 |
{
|
|
|
775 |
for ( h = height; h > 0; h--, line += pitch )
|
|
|
776 |
{
|
|
|
777 |
FT_Byte* pwrite = line;
|
|
|
778 |
FT_Int w;
|
|
|
779 |
FT_UInt wval = 0;
|
|
|
780 |
|
|
|
781 |
|
|
|
782 |
for ( w = line_bits; w >= 8; w -= 8 )
|
|
|
783 |
{
|
|
|
784 |
wval = (FT_UInt)( wval | *p++ );
|
|
|
785 |
pwrite[0] = (FT_Byte)( pwrite[0] | ( wval >> x_pos ) );
|
|
|
786 |
pwrite += 1;
|
|
|
787 |
wval <<= 8;
|
|
|
788 |
}
|
|
|
789 |
|
|
|
790 |
if ( w > 0 )
|
|
|
791 |
wval = (FT_UInt)( wval | ( *p++ & ( 0xFF00U >> w ) ) );
|
|
|
792 |
|
|
|
793 |
/* all bits read and there are `x_pos + w' bits to be written */
|
|
|
794 |
|
|
|
795 |
pwrite[0] = (FT_Byte)( pwrite[0] | ( wval >> x_pos ) );
|
|
|
796 |
|
|
|
797 |
if ( x_pos + w > 8 )
|
|
|
798 |
{
|
|
|
799 |
pwrite++;
|
|
|
800 |
wval <<= 8;
|
|
|
801 |
pwrite[0] = (FT_Byte)( pwrite[0] | ( wval >> x_pos ) );
|
|
|
802 |
}
|
|
|
803 |
}
|
|
|
804 |
}
|
|
|
805 |
|
|
|
806 |
Exit:
|
|
|
807 |
if ( !error )
|
|
|
808 |
FT_TRACE3(( "tt_sbit_decoder_load_byte_aligned: loaded\n" ));
|
|
|
809 |
return error;
|
|
|
810 |
}
|
|
|
811 |
|
|
|
812 |
|
|
|
813 |
/*
|
|
|
814 |
* Load a bit-aligned bitmap (with pointer `p') into a line-aligned bitmap
|
|
|
815 |
* (with pointer `pwrite'). In the example below, the width is 3 pixel,
|
|
|
816 |
* and `x_pos' is 1 pixel.
|
|
|
817 |
*
|
|
|
818 |
* p p+1
|
|
|
819 |
* | | |
|
|
|
820 |
* | 7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 |...
|
|
|
821 |
* | | |
|
|
|
822 |
* +-------+ +-------+ +-------+ ...
|
|
|
823 |
* . . .
|
|
|
824 |
* . . .
|
|
|
825 |
* v . .
|
|
|
826 |
* +-------+ . .
|
|
|
827 |
* | | .
|
|
|
828 |
* | 7 6 5 4 3 2 1 0 | .
|
|
|
829 |
* | | .
|
|
|
830 |
* pwrite . .
|
|
|
831 |
* . .
|
|
|
832 |
* v .
|
|
|
833 |
* +-------+ .
|
|
|
834 |
* | |
|
|
|
835 |
* | 7 6 5 4 3 2 1 0 |
|
|
|
836 |
* | |
|
|
|
837 |
* pwrite+1 .
|
|
|
838 |
* .
|
|
|
839 |
* v
|
|
|
840 |
* +-------+
|
|
|
841 |
* | |
|
|
|
842 |
* | 7 6 5 4 3 2 1 0 |
|
|
|
843 |
* | |
|
|
|
844 |
* pwrite+2
|
|
|
845 |
*
|
|
|
846 |
*/
|
|
|
847 |
|
|
|
848 |
static FT_Error
|
|
|
849 |
tt_sbit_decoder_load_bit_aligned( TT_SBitDecoder decoder,
|
|
|
850 |
FT_Byte* p,
|
|
|
851 |
FT_Byte* limit,
|
|
|
852 |
FT_Int x_pos,
|
|
|
853 |
FT_Int y_pos,
|
|
|
854 |
FT_UInt recurse_count )
|
|
|
855 |
{
|
|
|
856 |
FT_Error error = FT_Err_Ok;
|
|
|
857 |
FT_Byte* line;
|
|
|
858 |
FT_Int pitch, width, height, line_bits, h, nbits;
|
|
|
859 |
FT_UInt bit_height, bit_width;
|
|
|
860 |
FT_Bitmap* bitmap;
|
|
|
861 |
FT_UShort rval;
|
|
|
862 |
|
|
|
863 |
FT_UNUSED( recurse_count );
|
|
|
864 |
|
|
|
865 |
|
|
|
866 |
/* check that we can write the glyph into the bitmap */
|
|
|
867 |
bitmap = decoder->bitmap;
|
|
|
868 |
bit_width = bitmap->width;
|
|
|
869 |
bit_height = bitmap->rows;
|
|
|
870 |
pitch = bitmap->pitch;
|
|
|
871 |
line = bitmap->buffer;
|
|
|
872 |
|
|
|
873 |
width = decoder->metrics->width;
|
|
|
874 |
height = decoder->metrics->height;
|
|
|
875 |
|
|
|
876 |
line_bits = width * decoder->bit_depth;
|
|
|
877 |
|
|
|
878 |
if ( x_pos < 0 || (FT_UInt)( x_pos + width ) > bit_width ||
|
|
|
879 |
y_pos < 0 || (FT_UInt)( y_pos + height ) > bit_height )
|
|
|
880 |
{
|
|
|
881 |
FT_TRACE1(( "tt_sbit_decoder_load_bit_aligned:"
|
|
|
882 |
" invalid bitmap dimensions\n" ));
|
|
|
883 |
error = FT_THROW( Invalid_File_Format );
|
|
|
884 |
goto Exit;
|
|
|
885 |
}
|
|
|
886 |
|
|
|
887 |
if ( p + ( ( line_bits * height + 7 ) >> 3 ) > limit )
|
|
|
888 |
{
|
|
|
889 |
FT_TRACE1(( "tt_sbit_decoder_load_bit_aligned: broken bitmap\n" ));
|
|
|
890 |
error = FT_THROW( Invalid_File_Format );
|
|
|
891 |
goto Exit;
|
|
|
892 |
}
|
|
|
893 |
|
|
|
894 |
if ( !line_bits || !height )
|
|
|
895 |
{
|
|
|
896 |
/* nothing to do */
|
|
|
897 |
goto Exit;
|
|
|
898 |
}
|
|
|
899 |
|
|
|
900 |
/* now do the blit */
|
|
|
901 |
|
|
|
902 |
/* adjust `line' to point to the first byte of the bitmap */
|
|
|
903 |
line += y_pos * pitch + ( x_pos >> 3 );
|
|
|
904 |
x_pos &= 7;
|
|
|
905 |
|
|
|
906 |
/* the higher byte of `rval' is used as a buffer */
|
|
|
907 |
rval = 0;
|
|
|
908 |
nbits = 0;
|
|
|
909 |
|
|
|
910 |
for ( h = height; h > 0; h--, line += pitch )
|
|
|
911 |
{
|
|
|
912 |
FT_Byte* pwrite = line;
|
|
|
913 |
FT_Int w = line_bits;
|
|
|
914 |
|
|
|
915 |
|
|
|
916 |
/* handle initial byte (in target bitmap) specially if necessary */
|
|
|
917 |
if ( x_pos )
|
|
|
918 |
{
|
|
|
919 |
w = ( line_bits < 8 - x_pos ) ? line_bits : 8 - x_pos;
|
|
|
920 |
|
|
|
921 |
if ( h == height )
|
|
|
922 |
{
|
|
|
923 |
rval = *p++;
|
|
|
924 |
nbits = x_pos;
|
|
|
925 |
}
|
|
|
926 |
else if ( nbits < w )
|
|
|
927 |
{
|
|
|
928 |
if ( p < limit )
|
|
|
929 |
rval |= *p++;
|
|
|
930 |
nbits += 8 - w;
|
|
|
931 |
}
|
|
|
932 |
else
|
|
|
933 |
{
|
|
|
934 |
rval >>= 8;
|
|
|
935 |
nbits -= w;
|
|
|
936 |
}
|
|
|
937 |
|
|
|
938 |
*pwrite++ |= ( ( rval >> nbits ) & 0xFF ) &
|
|
|
939 |
( ~( 0xFFU << w ) << ( 8 - w - x_pos ) );
|
|
|
940 |
rval <<= 8;
|
|
|
941 |
|
|
|
942 |
w = line_bits - w;
|
|
|
943 |
}
|
|
|
944 |
|
|
|
945 |
/* handle medial bytes */
|
|
|
946 |
for ( ; w >= 8; w -= 8 )
|
|
|
947 |
{
|
|
|
948 |
rval |= *p++;
|
|
|
949 |
*pwrite++ |= ( rval >> nbits ) & 0xFF;
|
|
|
950 |
|
|
|
951 |
rval <<= 8;
|
|
|
952 |
}
|
|
|
953 |
|
|
|
954 |
/* handle final byte if necessary */
|
|
|
955 |
if ( w > 0 )
|
|
|
956 |
{
|
|
|
957 |
if ( nbits < w )
|
|
|
958 |
{
|
|
|
959 |
if ( p < limit )
|
|
|
960 |
rval |= *p++;
|
|
|
961 |
*pwrite |= ( ( rval >> nbits ) & 0xFF ) & ( 0xFF00U >> w );
|
|
|
962 |
nbits += 8 - w;
|
|
|
963 |
|
|
|
964 |
rval <<= 8;
|
|
|
965 |
}
|
|
|
966 |
else
|
|
|
967 |
{
|
|
|
968 |
*pwrite |= ( ( rval >> nbits ) & 0xFF ) & ( 0xFF00U >> w );
|
|
|
969 |
nbits -= w;
|
|
|
970 |
}
|
|
|
971 |
}
|
|
|
972 |
}
|
|
|
973 |
|
|
|
974 |
Exit:
|
|
|
975 |
if ( !error )
|
|
|
976 |
FT_TRACE3(( "tt_sbit_decoder_load_bit_aligned: loaded\n" ));
|
|
|
977 |
return error;
|
|
|
978 |
}
|
|
|
979 |
|
|
|
980 |
|
|
|
981 |
static FT_Error
|
|
|
982 |
tt_sbit_decoder_load_compound( TT_SBitDecoder decoder,
|
|
|
983 |
FT_Byte* p,
|
|
|
984 |
FT_Byte* limit,
|
|
|
985 |
FT_Int x_pos,
|
|
|
986 |
FT_Int y_pos,
|
|
|
987 |
FT_UInt recurse_count )
|
|
|
988 |
{
|
|
|
989 |
FT_Error error = FT_Err_Ok;
|
|
|
990 |
FT_UInt num_components, nn;
|
|
|
991 |
|
|
|
992 |
FT_Char horiBearingX = (FT_Char)decoder->metrics->horiBearingX;
|
|
|
993 |
FT_Char horiBearingY = (FT_Char)decoder->metrics->horiBearingY;
|
|
|
994 |
FT_Byte horiAdvance = (FT_Byte)decoder->metrics->horiAdvance;
|
|
|
995 |
FT_Char vertBearingX = (FT_Char)decoder->metrics->vertBearingX;
|
|
|
996 |
FT_Char vertBearingY = (FT_Char)decoder->metrics->vertBearingY;
|
|
|
997 |
FT_Byte vertAdvance = (FT_Byte)decoder->metrics->vertAdvance;
|
|
|
998 |
|
|
|
999 |
|
|
|
1000 |
if ( p + 2 > limit )
|
|
|
1001 |
goto Fail;
|
|
|
1002 |
|
|
|
1003 |
num_components = FT_NEXT_USHORT( p );
|
|
|
1004 |
if ( p + 4 * num_components > limit )
|
|
|
1005 |
{
|
|
|
1006 |
FT_TRACE1(( "tt_sbit_decoder_load_compound: broken table\n" ));
|
|
|
1007 |
goto Fail;
|
|
|
1008 |
}
|
|
|
1009 |
|
|
|
1010 |
FT_TRACE3(( "tt_sbit_decoder_load_compound: loading %d component%s\n",
|
|
|
1011 |
num_components,
|
|
|
1012 |
num_components == 1 ? "" : "s" ));
|
|
|
1013 |
|
|
|
1014 |
for ( nn = 0; nn < num_components; nn++ )
|
|
|
1015 |
{
|
|
|
1016 |
FT_UInt gindex = FT_NEXT_USHORT( p );
|
|
54876
|
1017 |
FT_Char dx = FT_NEXT_CHAR( p );
|
|
|
1018 |
FT_Char dy = FT_NEXT_CHAR( p );
|
|
49234
|
1019 |
|
|
|
1020 |
|
|
|
1021 |
/* NB: a recursive call */
|
|
|
1022 |
error = tt_sbit_decoder_load_image( decoder,
|
|
|
1023 |
gindex,
|
|
|
1024 |
x_pos + dx,
|
|
|
1025 |
y_pos + dy,
|
|
|
1026 |
recurse_count + 1,
|
|
|
1027 |
/* request full bitmap image */
|
|
|
1028 |
FALSE );
|
|
|
1029 |
if ( error )
|
|
|
1030 |
break;
|
|
|
1031 |
}
|
|
|
1032 |
|
|
|
1033 |
FT_TRACE3(( "tt_sbit_decoder_load_compound: done\n" ));
|
|
|
1034 |
|
|
|
1035 |
decoder->metrics->horiBearingX = horiBearingX;
|
|
|
1036 |
decoder->metrics->horiBearingY = horiBearingY;
|
|
|
1037 |
decoder->metrics->horiAdvance = horiAdvance;
|
|
|
1038 |
decoder->metrics->vertBearingX = vertBearingX;
|
|
|
1039 |
decoder->metrics->vertBearingY = vertBearingY;
|
|
|
1040 |
decoder->metrics->vertAdvance = vertAdvance;
|
|
|
1041 |
decoder->metrics->width = (FT_Byte)decoder->bitmap->width;
|
|
|
1042 |
decoder->metrics->height = (FT_Byte)decoder->bitmap->rows;
|
|
|
1043 |
|
|
|
1044 |
Exit:
|
|
|
1045 |
return error;
|
|
|
1046 |
|
|
|
1047 |
Fail:
|
|
|
1048 |
error = FT_THROW( Invalid_File_Format );
|
|
|
1049 |
goto Exit;
|
|
|
1050 |
}
|
|
|
1051 |
|
|
|
1052 |
|
|
|
1053 |
#ifdef FT_CONFIG_OPTION_USE_PNG
|
|
|
1054 |
|
|
|
1055 |
static FT_Error
|
|
|
1056 |
tt_sbit_decoder_load_png( TT_SBitDecoder decoder,
|
|
|
1057 |
FT_Byte* p,
|
|
|
1058 |
FT_Byte* limit,
|
|
|
1059 |
FT_Int x_pos,
|
|
|
1060 |
FT_Int y_pos,
|
|
|
1061 |
FT_UInt recurse_count )
|
|
|
1062 |
{
|
|
|
1063 |
FT_Error error = FT_Err_Ok;
|
|
|
1064 |
FT_ULong png_len;
|
|
|
1065 |
|
|
|
1066 |
FT_UNUSED( recurse_count );
|
|
|
1067 |
|
|
|
1068 |
|
|
|
1069 |
if ( limit - p < 4 )
|
|
|
1070 |
{
|
|
|
1071 |
FT_TRACE1(( "tt_sbit_decoder_load_png: broken bitmap\n" ));
|
|
|
1072 |
error = FT_THROW( Invalid_File_Format );
|
|
|
1073 |
goto Exit;
|
|
|
1074 |
}
|
|
|
1075 |
|
|
|
1076 |
png_len = FT_NEXT_ULONG( p );
|
|
|
1077 |
if ( (FT_ULong)( limit - p ) < png_len )
|
|
|
1078 |
{
|
|
|
1079 |
FT_TRACE1(( "tt_sbit_decoder_load_png: broken bitmap\n" ));
|
|
|
1080 |
error = FT_THROW( Invalid_File_Format );
|
|
|
1081 |
goto Exit;
|
|
|
1082 |
}
|
|
|
1083 |
|
|
|
1084 |
error = Load_SBit_Png( decoder->face->root.glyph,
|
|
|
1085 |
x_pos,
|
|
|
1086 |
y_pos,
|
|
|
1087 |
decoder->bit_depth,
|
|
|
1088 |
decoder->metrics,
|
|
|
1089 |
decoder->stream->memory,
|
|
|
1090 |
p,
|
|
|
1091 |
png_len,
|
|
|
1092 |
FALSE,
|
|
|
1093 |
FALSE );
|
|
|
1094 |
|
|
|
1095 |
Exit:
|
|
|
1096 |
if ( !error )
|
|
|
1097 |
FT_TRACE3(( "tt_sbit_decoder_load_png: loaded\n" ));
|
|
|
1098 |
return error;
|
|
|
1099 |
}
|
|
|
1100 |
|
|
|
1101 |
#endif /* FT_CONFIG_OPTION_USE_PNG */
|
|
|
1102 |
|
|
|
1103 |
|
|
|
1104 |
static FT_Error
|
|
|
1105 |
tt_sbit_decoder_load_bitmap( TT_SBitDecoder decoder,
|
|
|
1106 |
FT_UInt glyph_format,
|
|
|
1107 |
FT_ULong glyph_start,
|
|
|
1108 |
FT_ULong glyph_size,
|
|
|
1109 |
FT_Int x_pos,
|
|
|
1110 |
FT_Int y_pos,
|
|
|
1111 |
FT_UInt recurse_count,
|
|
|
1112 |
FT_Bool metrics_only )
|
|
|
1113 |
{
|
|
|
1114 |
FT_Error error;
|
|
|
1115 |
FT_Stream stream = decoder->stream;
|
|
|
1116 |
FT_Byte* p;
|
|
|
1117 |
FT_Byte* p_limit;
|
|
|
1118 |
FT_Byte* data;
|
|
|
1119 |
|
|
|
1120 |
|
|
|
1121 |
/* seek into the EBDT table now */
|
|
|
1122 |
if ( !glyph_size ||
|
|
|
1123 |
glyph_start + glyph_size > decoder->ebdt_size )
|
|
|
1124 |
{
|
|
|
1125 |
error = FT_THROW( Invalid_Argument );
|
|
|
1126 |
goto Exit;
|
|
|
1127 |
}
|
|
|
1128 |
|
|
|
1129 |
if ( FT_STREAM_SEEK( decoder->ebdt_start + glyph_start ) ||
|
|
|
1130 |
FT_FRAME_EXTRACT( glyph_size, data ) )
|
|
|
1131 |
goto Exit;
|
|
|
1132 |
|
|
|
1133 |
p = data;
|
|
|
1134 |
p_limit = p + glyph_size;
|
|
|
1135 |
|
|
|
1136 |
/* read the data, depending on the glyph format */
|
|
|
1137 |
switch ( glyph_format )
|
|
|
1138 |
{
|
|
|
1139 |
case 1:
|
|
|
1140 |
case 2:
|
|
|
1141 |
case 8:
|
|
|
1142 |
case 17:
|
|
|
1143 |
error = tt_sbit_decoder_load_metrics( decoder, &p, p_limit, 0 );
|
|
|
1144 |
break;
|
|
|
1145 |
|
|
|
1146 |
case 6:
|
|
|
1147 |
case 7:
|
|
|
1148 |
case 9:
|
|
|
1149 |
case 18:
|
|
|
1150 |
error = tt_sbit_decoder_load_metrics( decoder, &p, p_limit, 1 );
|
|
|
1151 |
break;
|
|
|
1152 |
|
|
|
1153 |
default:
|
|
|
1154 |
error = FT_Err_Ok;
|
|
|
1155 |
}
|
|
|
1156 |
|
|
|
1157 |
if ( error )
|
|
|
1158 |
goto Fail;
|
|
|
1159 |
|
|
|
1160 |
{
|
|
|
1161 |
TT_SBitDecoder_LoadFunc loader;
|
|
|
1162 |
|
|
|
1163 |
|
|
|
1164 |
switch ( glyph_format )
|
|
|
1165 |
{
|
|
|
1166 |
case 1:
|
|
|
1167 |
case 6:
|
|
|
1168 |
loader = tt_sbit_decoder_load_byte_aligned;
|
|
|
1169 |
break;
|
|
|
1170 |
|
|
|
1171 |
case 2:
|
|
|
1172 |
case 7:
|
|
|
1173 |
{
|
|
|
1174 |
/* Don't trust `glyph_format'. For example, Apple's main Korean */
|
|
|
1175 |
/* system font, `AppleMyungJo.ttf' (version 7.0d2e6), uses glyph */
|
|
|
1176 |
/* format 7, but the data is format 6. We check whether we have */
|
|
|
1177 |
/* an excessive number of bytes in the image: If it is equal to */
|
|
|
1178 |
/* the value for a byte-aligned glyph, use the other loading */
|
|
|
1179 |
/* routine. */
|
|
|
1180 |
/* */
|
|
|
1181 |
/* Note that for some (width,height) combinations, where the */
|
|
|
1182 |
/* width is not a multiple of 8, the sizes for bit- and */
|
|
|
1183 |
/* byte-aligned data are equal, for example (7,7) or (15,6). We */
|
|
|
1184 |
/* then prefer what `glyph_format' specifies. */
|
|
|
1185 |
|
|
|
1186 |
FT_UInt width = decoder->metrics->width;
|
|
|
1187 |
FT_UInt height = decoder->metrics->height;
|
|
|
1188 |
|
|
|
1189 |
FT_UInt bit_size = ( width * height + 7 ) >> 3;
|
|
|
1190 |
FT_UInt byte_size = height * ( ( width + 7 ) >> 3 );
|
|
|
1191 |
|
|
|
1192 |
|
|
|
1193 |
if ( bit_size < byte_size &&
|
|
|
1194 |
byte_size == (FT_UInt)( p_limit - p ) )
|
|
|
1195 |
loader = tt_sbit_decoder_load_byte_aligned;
|
|
|
1196 |
else
|
|
|
1197 |
loader = tt_sbit_decoder_load_bit_aligned;
|
|
|
1198 |
}
|
|
|
1199 |
break;
|
|
|
1200 |
|
|
|
1201 |
case 5:
|
|
|
1202 |
loader = tt_sbit_decoder_load_bit_aligned;
|
|
|
1203 |
break;
|
|
|
1204 |
|
|
|
1205 |
case 8:
|
|
|
1206 |
if ( p + 1 > p_limit )
|
|
|
1207 |
goto Fail;
|
|
|
1208 |
|
|
|
1209 |
p += 1; /* skip padding */
|
|
|
1210 |
/* fall-through */
|
|
|
1211 |
|
|
|
1212 |
case 9:
|
|
|
1213 |
loader = tt_sbit_decoder_load_compound;
|
|
|
1214 |
break;
|
|
|
1215 |
|
|
|
1216 |
case 17: /* small metrics, PNG image data */
|
|
|
1217 |
case 18: /* big metrics, PNG image data */
|
|
|
1218 |
case 19: /* metrics in EBLC, PNG image data */
|
|
|
1219 |
#ifdef FT_CONFIG_OPTION_USE_PNG
|
|
|
1220 |
loader = tt_sbit_decoder_load_png;
|
|
|
1221 |
break;
|
|
|
1222 |
#else
|
|
|
1223 |
error = FT_THROW( Unimplemented_Feature );
|
|
|
1224 |
goto Fail;
|
|
|
1225 |
#endif /* FT_CONFIG_OPTION_USE_PNG */
|
|
|
1226 |
|
|
|
1227 |
default:
|
|
|
1228 |
error = FT_THROW( Invalid_Table );
|
|
|
1229 |
goto Fail;
|
|
|
1230 |
}
|
|
|
1231 |
|
|
|
1232 |
if ( !decoder->bitmap_allocated )
|
|
|
1233 |
{
|
|
|
1234 |
error = tt_sbit_decoder_alloc_bitmap( decoder, metrics_only );
|
|
|
1235 |
|
|
|
1236 |
if ( error )
|
|
|
1237 |
goto Fail;
|
|
|
1238 |
}
|
|
|
1239 |
|
|
|
1240 |
if ( metrics_only )
|
|
|
1241 |
goto Fail; /* this is not an error */
|
|
|
1242 |
|
|
|
1243 |
error = loader( decoder, p, p_limit, x_pos, y_pos, recurse_count );
|
|
|
1244 |
}
|
|
|
1245 |
|
|
|
1246 |
Fail:
|
|
|
1247 |
FT_FRAME_RELEASE( data );
|
|
|
1248 |
|
|
|
1249 |
Exit:
|
|
|
1250 |
return error;
|
|
|
1251 |
}
|
|
|
1252 |
|
|
|
1253 |
|
|
|
1254 |
static FT_Error
|
|
|
1255 |
tt_sbit_decoder_load_image( TT_SBitDecoder decoder,
|
|
|
1256 |
FT_UInt glyph_index,
|
|
|
1257 |
FT_Int x_pos,
|
|
|
1258 |
FT_Int y_pos,
|
|
|
1259 |
FT_UInt recurse_count,
|
|
|
1260 |
FT_Bool metrics_only )
|
|
|
1261 |
{
|
|
|
1262 |
FT_Byte* p = decoder->eblc_base + decoder->strike_index_array;
|
|
|
1263 |
FT_Byte* p_limit = decoder->eblc_limit;
|
|
|
1264 |
FT_ULong num_ranges = decoder->strike_index_count;
|
|
|
1265 |
FT_UInt start, end, index_format, image_format;
|
|
|
1266 |
FT_ULong image_start = 0, image_end = 0, image_offset;
|
|
|
1267 |
|
|
|
1268 |
|
|
|
1269 |
/* arbitrary recursion limit */
|
|
|
1270 |
if ( recurse_count > 100 )
|
|
|
1271 |
{
|
|
|
1272 |
FT_TRACE4(( "tt_sbit_decoder_load_image:"
|
|
|
1273 |
" recursion depth exceeded\n" ));
|
|
|
1274 |
goto Failure;
|
|
|
1275 |
}
|
|
|
1276 |
|
|
|
1277 |
|
|
|
1278 |
/* First, we find the correct strike range that applies to this */
|
|
|
1279 |
/* glyph index. */
|
|
|
1280 |
for ( ; num_ranges > 0; num_ranges-- )
|
|
|
1281 |
{
|
|
|
1282 |
start = FT_NEXT_USHORT( p );
|
|
|
1283 |
end = FT_NEXT_USHORT( p );
|
|
|
1284 |
|
|
|
1285 |
if ( glyph_index >= start && glyph_index <= end )
|
|
|
1286 |
goto FoundRange;
|
|
|
1287 |
|
|
|
1288 |
p += 4; /* ignore index offset */
|
|
|
1289 |
}
|
|
|
1290 |
goto NoBitmap;
|
|
|
1291 |
|
|
|
1292 |
FoundRange:
|
|
|
1293 |
image_offset = FT_NEXT_ULONG( p );
|
|
|
1294 |
|
|
|
1295 |
/* overflow check */
|
|
|
1296 |
p = decoder->eblc_base + decoder->strike_index_array;
|
|
|
1297 |
if ( image_offset > (FT_ULong)( p_limit - p ) )
|
|
|
1298 |
goto Failure;
|
|
|
1299 |
|
|
|
1300 |
p += image_offset;
|
|
|
1301 |
if ( p + 8 > p_limit )
|
|
|
1302 |
goto NoBitmap;
|
|
|
1303 |
|
|
|
1304 |
/* now find the glyph's location and extend within the ebdt table */
|
|
|
1305 |
index_format = FT_NEXT_USHORT( p );
|
|
|
1306 |
image_format = FT_NEXT_USHORT( p );
|
|
|
1307 |
image_offset = FT_NEXT_ULONG ( p );
|
|
|
1308 |
|
|
|
1309 |
switch ( index_format )
|
|
|
1310 |
{
|
|
|
1311 |
case 1: /* 4-byte offsets relative to `image_offset' */
|
|
|
1312 |
p += 4 * ( glyph_index - start );
|
|
|
1313 |
if ( p + 8 > p_limit )
|
|
|
1314 |
goto NoBitmap;
|
|
|
1315 |
|
|
|
1316 |
image_start = FT_NEXT_ULONG( p );
|
|
|
1317 |
image_end = FT_NEXT_ULONG( p );
|
|
|
1318 |
|
|
|
1319 |
if ( image_start == image_end ) /* missing glyph */
|
|
|
1320 |
goto NoBitmap;
|
|
|
1321 |
break;
|
|
|
1322 |
|
|
|
1323 |
case 2: /* big metrics, constant image size */
|
|
|
1324 |
{
|
|
|
1325 |
FT_ULong image_size;
|
|
|
1326 |
|
|
|
1327 |
|
|
|
1328 |
if ( p + 12 > p_limit )
|
|
|
1329 |
goto NoBitmap;
|
|
|
1330 |
|
|
|
1331 |
image_size = FT_NEXT_ULONG( p );
|
|
|
1332 |
|
|
|
1333 |
if ( tt_sbit_decoder_load_metrics( decoder, &p, p_limit, 1 ) )
|
|
|
1334 |
goto NoBitmap;
|
|
|
1335 |
|
|
|
1336 |
image_start = image_size * ( glyph_index - start );
|
|
|
1337 |
image_end = image_start + image_size;
|
|
|
1338 |
}
|
|
|
1339 |
break;
|
|
|
1340 |
|
|
|
1341 |
case 3: /* 2-byte offsets relative to 'image_offset' */
|
|
|
1342 |
p += 2 * ( glyph_index - start );
|
|
|
1343 |
if ( p + 4 > p_limit )
|
|
|
1344 |
goto NoBitmap;
|
|
|
1345 |
|
|
|
1346 |
image_start = FT_NEXT_USHORT( p );
|
|
|
1347 |
image_end = FT_NEXT_USHORT( p );
|
|
|
1348 |
|
|
|
1349 |
if ( image_start == image_end ) /* missing glyph */
|
|
|
1350 |
goto NoBitmap;
|
|
|
1351 |
break;
|
|
|
1352 |
|
|
|
1353 |
case 4: /* sparse glyph array with (glyph,offset) pairs */
|
|
|
1354 |
{
|
|
|
1355 |
FT_ULong mm, num_glyphs;
|
|
|
1356 |
|
|
|
1357 |
|
|
|
1358 |
if ( p + 4 > p_limit )
|
|
|
1359 |
goto NoBitmap;
|
|
|
1360 |
|
|
|
1361 |
num_glyphs = FT_NEXT_ULONG( p );
|
|
|
1362 |
|
|
|
1363 |
/* overflow check for p + ( num_glyphs + 1 ) * 4 */
|
|
|
1364 |
if ( p + 4 > p_limit ||
|
|
|
1365 |
num_glyphs > (FT_ULong)( ( ( p_limit - p ) >> 2 ) - 1 ) )
|
|
|
1366 |
goto NoBitmap;
|
|
|
1367 |
|
|
|
1368 |
for ( mm = 0; mm < num_glyphs; mm++ )
|
|
|
1369 |
{
|
|
|
1370 |
FT_UInt gindex = FT_NEXT_USHORT( p );
|
|
|
1371 |
|
|
|
1372 |
|
|
|
1373 |
if ( gindex == glyph_index )
|
|
|
1374 |
{
|
|
|
1375 |
image_start = FT_NEXT_USHORT( p );
|
|
|
1376 |
p += 2;
|
|
|
1377 |
image_end = FT_PEEK_USHORT( p );
|
|
|
1378 |
break;
|
|
|
1379 |
}
|
|
|
1380 |
p += 2;
|
|
|
1381 |
}
|
|
|
1382 |
|
|
|
1383 |
if ( mm >= num_glyphs )
|
|
|
1384 |
goto NoBitmap;
|
|
|
1385 |
}
|
|
|
1386 |
break;
|
|
|
1387 |
|
|
|
1388 |
case 5: /* constant metrics with sparse glyph codes */
|
|
|
1389 |
case 19:
|
|
|
1390 |
{
|
|
|
1391 |
FT_ULong image_size, mm, num_glyphs;
|
|
|
1392 |
|
|
|
1393 |
|
|
|
1394 |
if ( p + 16 > p_limit )
|
|
|
1395 |
goto NoBitmap;
|
|
|
1396 |
|
|
|
1397 |
image_size = FT_NEXT_ULONG( p );
|
|
|
1398 |
|
|
|
1399 |
if ( tt_sbit_decoder_load_metrics( decoder, &p, p_limit, 1 ) )
|
|
|
1400 |
goto NoBitmap;
|
|
|
1401 |
|
|
|
1402 |
num_glyphs = FT_NEXT_ULONG( p );
|
|
|
1403 |
|
|
|
1404 |
/* overflow check for p + 2 * num_glyphs */
|
|
|
1405 |
if ( num_glyphs > (FT_ULong)( ( p_limit - p ) >> 1 ) )
|
|
|
1406 |
goto NoBitmap;
|
|
|
1407 |
|
|
|
1408 |
for ( mm = 0; mm < num_glyphs; mm++ )
|
|
|
1409 |
{
|
|
|
1410 |
FT_UInt gindex = FT_NEXT_USHORT( p );
|
|
|
1411 |
|
|
|
1412 |
|
|
|
1413 |
if ( gindex == glyph_index )
|
|
|
1414 |
break;
|
|
|
1415 |
}
|
|
|
1416 |
|
|
|
1417 |
if ( mm >= num_glyphs )
|
|
|
1418 |
goto NoBitmap;
|
|
|
1419 |
|
|
|
1420 |
image_start = image_size * mm;
|
|
|
1421 |
image_end = image_start + image_size;
|
|
|
1422 |
}
|
|
|
1423 |
break;
|
|
|
1424 |
|
|
|
1425 |
default:
|
|
|
1426 |
goto NoBitmap;
|
|
|
1427 |
}
|
|
|
1428 |
|
|
|
1429 |
if ( image_start > image_end )
|
|
|
1430 |
goto NoBitmap;
|
|
|
1431 |
|
|
|
1432 |
image_end -= image_start;
|
|
|
1433 |
image_start = image_offset + image_start;
|
|
|
1434 |
|
|
|
1435 |
FT_TRACE3(( "tt_sbit_decoder_load_image:"
|
|
|
1436 |
" found sbit (format %d) for glyph index %d\n",
|
|
|
1437 |
image_format, glyph_index ));
|
|
|
1438 |
|
|
|
1439 |
return tt_sbit_decoder_load_bitmap( decoder,
|
|
|
1440 |
image_format,
|
|
|
1441 |
image_start,
|
|
|
1442 |
image_end,
|
|
|
1443 |
x_pos,
|
|
|
1444 |
y_pos,
|
|
|
1445 |
recurse_count,
|
|
|
1446 |
metrics_only );
|
|
|
1447 |
|
|
|
1448 |
Failure:
|
|
|
1449 |
return FT_THROW( Invalid_Table );
|
|
|
1450 |
|
|
|
1451 |
NoBitmap:
|
|
|
1452 |
if ( recurse_count )
|
|
|
1453 |
{
|
|
|
1454 |
FT_TRACE4(( "tt_sbit_decoder_load_image:"
|
|
|
1455 |
" missing subglyph sbit with glyph index %d\n",
|
|
|
1456 |
glyph_index ));
|
|
|
1457 |
return FT_THROW( Invalid_Composite );
|
|
|
1458 |
}
|
|
|
1459 |
|
|
|
1460 |
FT_TRACE4(( "tt_sbit_decoder_load_image:"
|
|
|
1461 |
" no sbit found for glyph index %d\n", glyph_index ));
|
|
|
1462 |
return FT_THROW( Missing_Bitmap );
|
|
|
1463 |
}
|
|
|
1464 |
|
|
|
1465 |
|
|
|
1466 |
static FT_Error
|
|
|
1467 |
tt_face_load_sbix_image( TT_Face face,
|
|
|
1468 |
FT_ULong strike_index,
|
|
|
1469 |
FT_UInt glyph_index,
|
|
|
1470 |
FT_Stream stream,
|
|
|
1471 |
FT_Bitmap *map,
|
|
|
1472 |
TT_SBit_MetricsRec *metrics,
|
|
|
1473 |
FT_Bool metrics_only )
|
|
|
1474 |
{
|
|
|
1475 |
FT_UInt strike_offset, glyph_start, glyph_end;
|
|
|
1476 |
FT_Int originOffsetX, originOffsetY;
|
|
|
1477 |
FT_Tag graphicType;
|
|
|
1478 |
FT_Int recurse_depth = 0;
|
|
|
1479 |
|
|
|
1480 |
FT_Error error;
|
|
|
1481 |
FT_Byte* p;
|
|
|
1482 |
|
|
|
1483 |
FT_UNUSED( map );
|
|
|
1484 |
#ifndef FT_CONFIG_OPTION_USE_PNG
|
|
|
1485 |
FT_UNUSED( metrics_only );
|
|
|
1486 |
#endif
|
|
|
1487 |
|
|
|
1488 |
|
|
|
1489 |
strike_index = face->sbit_strike_map[strike_index];
|
|
|
1490 |
|
|
|
1491 |
metrics->width = 0;
|
|
|
1492 |
metrics->height = 0;
|
|
|
1493 |
|
|
|
1494 |
p = face->sbit_table + 8 + 4 * strike_index;
|
|
|
1495 |
strike_offset = FT_NEXT_ULONG( p );
|
|
|
1496 |
|
|
|
1497 |
retry:
|
|
|
1498 |
if ( glyph_index > (FT_UInt)face->root.num_glyphs )
|
|
|
1499 |
return FT_THROW( Invalid_Argument );
|
|
|
1500 |
|
|
|
1501 |
if ( strike_offset >= face->ebdt_size ||
|
|
|
1502 |
face->ebdt_size - strike_offset < 4 + glyph_index * 4 + 8 )
|
|
|
1503 |
return FT_THROW( Invalid_File_Format );
|
|
|
1504 |
|
|
|
1505 |
if ( FT_STREAM_SEEK( face->ebdt_start +
|
|
|
1506 |
strike_offset + 4 +
|
|
|
1507 |
glyph_index * 4 ) ||
|
|
|
1508 |
FT_FRAME_ENTER( 8 ) )
|
|
|
1509 |
return error;
|
|
|
1510 |
|
|
|
1511 |
glyph_start = FT_GET_ULONG();
|
|
|
1512 |
glyph_end = FT_GET_ULONG();
|
|
|
1513 |
|
|
|
1514 |
FT_FRAME_EXIT();
|
|
|
1515 |
|
|
|
1516 |
if ( glyph_start == glyph_end )
|
|
50479
|
1517 |
return FT_THROW( Missing_Bitmap );
|
|
49234
|
1518 |
if ( glyph_start > glyph_end ||
|
|
|
1519 |
glyph_end - glyph_start < 8 ||
|
|
|
1520 |
face->ebdt_size - strike_offset < glyph_end )
|
|
|
1521 |
return FT_THROW( Invalid_File_Format );
|
|
|
1522 |
|
|
|
1523 |
if ( FT_STREAM_SEEK( face->ebdt_start + strike_offset + glyph_start ) ||
|
|
|
1524 |
FT_FRAME_ENTER( glyph_end - glyph_start ) )
|
|
|
1525 |
return error;
|
|
|
1526 |
|
|
|
1527 |
originOffsetX = FT_GET_SHORT();
|
|
|
1528 |
originOffsetY = FT_GET_SHORT();
|
|
|
1529 |
|
|
|
1530 |
graphicType = FT_GET_TAG4();
|
|
|
1531 |
|
|
|
1532 |
switch ( graphicType )
|
|
|
1533 |
{
|
|
|
1534 |
case FT_MAKE_TAG( 'd', 'u', 'p', 'e' ):
|
|
|
1535 |
if ( recurse_depth < 4 )
|
|
|
1536 |
{
|
|
|
1537 |
glyph_index = FT_GET_USHORT();
|
|
|
1538 |
FT_FRAME_EXIT();
|
|
|
1539 |
recurse_depth++;
|
|
|
1540 |
goto retry;
|
|
|
1541 |
}
|
|
|
1542 |
error = FT_THROW( Invalid_File_Format );
|
|
|
1543 |
break;
|
|
|
1544 |
|
|
|
1545 |
case FT_MAKE_TAG( 'p', 'n', 'g', ' ' ):
|
|
|
1546 |
#ifdef FT_CONFIG_OPTION_USE_PNG
|
|
|
1547 |
error = Load_SBit_Png( face->root.glyph,
|
|
|
1548 |
0,
|
|
|
1549 |
0,
|
|
|
1550 |
32,
|
|
|
1551 |
metrics,
|
|
|
1552 |
stream->memory,
|
|
|
1553 |
stream->cursor,
|
|
|
1554 |
glyph_end - glyph_start - 8,
|
|
|
1555 |
TRUE,
|
|
|
1556 |
metrics_only );
|
|
|
1557 |
#else
|
|
|
1558 |
error = FT_THROW( Unimplemented_Feature );
|
|
|
1559 |
#endif
|
|
|
1560 |
break;
|
|
|
1561 |
|
|
|
1562 |
case FT_MAKE_TAG( 'j', 'p', 'g', ' ' ):
|
|
|
1563 |
case FT_MAKE_TAG( 't', 'i', 'f', 'f' ):
|
|
|
1564 |
case FT_MAKE_TAG( 'r', 'g', 'b', 'l' ): /* used on iOS 7.1 */
|
|
|
1565 |
error = FT_THROW( Unknown_File_Format );
|
|
|
1566 |
break;
|
|
|
1567 |
|
|
|
1568 |
default:
|
|
|
1569 |
error = FT_THROW( Unimplemented_Feature );
|
|
|
1570 |
break;
|
|
|
1571 |
}
|
|
|
1572 |
|
|
|
1573 |
FT_FRAME_EXIT();
|
|
|
1574 |
|
|
|
1575 |
if ( !error )
|
|
|
1576 |
{
|
|
|
1577 |
FT_Short abearing;
|
|
|
1578 |
FT_UShort aadvance;
|
|
|
1579 |
|
|
|
1580 |
|
|
|
1581 |
tt_face_get_metrics( face, FALSE, glyph_index, &abearing, &aadvance );
|
|
|
1582 |
|
|
|
1583 |
metrics->horiBearingX = (FT_Short)originOffsetX;
|
|
|
1584 |
metrics->horiBearingY = (FT_Short)( -originOffsetY + metrics->height );
|
|
|
1585 |
metrics->horiAdvance = (FT_UShort)( aadvance *
|
|
|
1586 |
face->root.size->metrics.x_ppem /
|
|
|
1587 |
face->header.Units_Per_EM );
|
|
|
1588 |
}
|
|
|
1589 |
|
|
|
1590 |
return error;
|
|
|
1591 |
}
|
|
|
1592 |
|
|
|
1593 |
FT_LOCAL( FT_Error )
|
|
|
1594 |
tt_face_load_sbit_image( TT_Face face,
|
|
|
1595 |
FT_ULong strike_index,
|
|
|
1596 |
FT_UInt glyph_index,
|
|
|
1597 |
FT_UInt load_flags,
|
|
|
1598 |
FT_Stream stream,
|
|
|
1599 |
FT_Bitmap *map,
|
|
|
1600 |
TT_SBit_MetricsRec *metrics )
|
|
|
1601 |
{
|
|
|
1602 |
FT_Error error = FT_Err_Ok;
|
|
|
1603 |
|
|
|
1604 |
|
|
|
1605 |
switch ( (FT_UInt)face->sbit_table_type )
|
|
|
1606 |
{
|
|
|
1607 |
case TT_SBIT_TABLE_TYPE_EBLC:
|
|
|
1608 |
case TT_SBIT_TABLE_TYPE_CBLC:
|
|
|
1609 |
{
|
|
|
1610 |
TT_SBitDecoderRec decoder[1];
|
|
|
1611 |
|
|
|
1612 |
|
|
|
1613 |
error = tt_sbit_decoder_init( decoder, face, strike_index, metrics );
|
|
|
1614 |
if ( !error )
|
|
|
1615 |
{
|
|
|
1616 |
error = tt_sbit_decoder_load_image(
|
|
|
1617 |
decoder,
|
|
|
1618 |
glyph_index,
|
|
|
1619 |
0,
|
|
|
1620 |
0,
|
|
|
1621 |
0,
|
|
|
1622 |
( load_flags & FT_LOAD_BITMAP_METRICS_ONLY ) != 0 );
|
|
|
1623 |
tt_sbit_decoder_done( decoder );
|
|
|
1624 |
}
|
|
|
1625 |
}
|
|
|
1626 |
break;
|
|
|
1627 |
|
|
|
1628 |
case TT_SBIT_TABLE_TYPE_SBIX:
|
|
|
1629 |
error = tt_face_load_sbix_image(
|
|
|
1630 |
face,
|
|
|
1631 |
strike_index,
|
|
|
1632 |
glyph_index,
|
|
|
1633 |
stream,
|
|
|
1634 |
map,
|
|
|
1635 |
metrics,
|
|
|
1636 |
( load_flags & FT_LOAD_BITMAP_METRICS_ONLY ) != 0 );
|
|
|
1637 |
break;
|
|
|
1638 |
|
|
|
1639 |
default:
|
|
|
1640 |
error = FT_THROW( Unknown_File_Format );
|
|
|
1641 |
break;
|
|
|
1642 |
}
|
|
|
1643 |
|
|
|
1644 |
/* Flatten color bitmaps if color was not requested. */
|
|
|
1645 |
if ( !error &&
|
|
|
1646 |
!( load_flags & FT_LOAD_COLOR ) &&
|
|
|
1647 |
!( load_flags & FT_LOAD_BITMAP_METRICS_ONLY ) &&
|
|
|
1648 |
map->pixel_mode == FT_PIXEL_MODE_BGRA )
|
|
|
1649 |
{
|
|
|
1650 |
FT_Bitmap new_map;
|
|
|
1651 |
FT_Library library = face->root.glyph->library;
|
|
|
1652 |
|
|
|
1653 |
|
|
|
1654 |
FT_Bitmap_Init( &new_map );
|
|
|
1655 |
|
|
|
1656 |
/* Convert to 8bit grayscale. */
|
|
|
1657 |
error = FT_Bitmap_Convert( library, map, &new_map, 1 );
|
|
|
1658 |
if ( error )
|
|
|
1659 |
FT_Bitmap_Done( library, &new_map );
|
|
|
1660 |
else
|
|
|
1661 |
{
|
|
|
1662 |
map->pixel_mode = new_map.pixel_mode;
|
|
|
1663 |
map->pitch = new_map.pitch;
|
|
|
1664 |
map->num_grays = new_map.num_grays;
|
|
|
1665 |
|
|
|
1666 |
ft_glyphslot_set_bitmap( face->root.glyph, new_map.buffer );
|
|
|
1667 |
face->root.glyph->internal->flags |= FT_GLYPH_OWN_BITMAP;
|
|
|
1668 |
}
|
|
|
1669 |
}
|
|
|
1670 |
|
|
|
1671 |
return error;
|
|
|
1672 |
}
|
|
|
1673 |
|
|
|
1674 |
#else /* !TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
|
|
|
1675 |
|
|
|
1676 |
/* ANSI C doesn't like empty source files */
|
|
|
1677 |
typedef int _tt_sbit_dummy;
|
|
|
1678 |
|
|
|
1679 |
#endif /* !TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
|
|
|
1680 |
|
|
|
1681 |
|
|
|
1682 |
/* END */
|