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5172
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/***************************************************************************/
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2 |
/* */
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3 |
/* ttgxvar.c */
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4 |
/* */
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5 |
/* TrueType GX Font Variation loader */
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6 |
/* */
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/* Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010 by */
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8 |
/* David Turner, Robert Wilhelm, Werner Lemberg, and George Williams. */
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9 |
/* */
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/* This file is part of the FreeType project, and may only be used, */
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11 |
/* 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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/*************************************************************************/
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20 |
/* */
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21 |
/* Apple documents the `fvar', `gvar', `cvar', and `avar' tables at */
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22 |
/* */
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23 |
/* http://developer.apple.com/fonts/TTRefMan/RM06/Chap6[fgca]var.html */
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24 |
/* */
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25 |
/* The documentation for `fvar' is inconsistent. At one point it says */
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26 |
/* that `countSizePairs' should be 3, at another point 2. It should */
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27 |
/* be 2. */
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28 |
/* */
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29 |
/* The documentation for `gvar' is not intelligible; `cvar' refers you */
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30 |
/* to `gvar' and is thus also incomprehensible. */
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31 |
/* */
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32 |
/* The documentation for `avar' appears correct, but Apple has no fonts */
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33 |
/* with an `avar' table, so it is hard to test. */
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34 |
/* */
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35 |
/* Many thanks to John Jenkins (at Apple) in figuring this out. */
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36 |
/* */
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37 |
/* */
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38 |
/* Apple's `kern' table has some references to tuple indices, but as */
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39 |
/* there is no indication where these indices are defined, nor how to */
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40 |
/* interpolate the kerning values (different tuples have different */
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/* classes) this issue is ignored. */
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/* */
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/*************************************************************************/
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45 |
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46 |
#include <ft2build.h>
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47 |
#include FT_INTERNAL_DEBUG_H
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48 |
#include FT_CONFIG_CONFIG_H
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49 |
#include FT_INTERNAL_STREAM_H
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50 |
#include FT_INTERNAL_SFNT_H
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51 |
#include FT_TRUETYPE_TAGS_H
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52 |
#include FT_MULTIPLE_MASTERS_H
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53 |
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54 |
#include "ttpload.h"
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55 |
#include "ttgxvar.h"
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56 |
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57 |
#include "tterrors.h"
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58 |
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59 |
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60 |
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
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61 |
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62 |
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63 |
#define FT_Stream_FTell( stream ) \
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( (stream)->cursor - (stream)->base )
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65 |
#define FT_Stream_SeekSet( stream, off ) \
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66 |
( (stream)->cursor = (stream)->base+(off) )
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67 |
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68 |
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69 |
/*************************************************************************/
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70 |
/* */
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71 |
/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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72 |
/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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74 |
/* */
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#undef FT_COMPONENT
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76 |
#define FT_COMPONENT trace_ttgxvar
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78 |
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/*************************************************************************/
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80 |
/*************************************************************************/
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/***** *****/
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/***** Internal Routines *****/
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83 |
/***** *****/
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/*************************************************************************/
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85 |
/*************************************************************************/
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88 |
/*************************************************************************/
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89 |
/* */
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90 |
/* The macro ALL_POINTS is used in `ft_var_readpackedpoints'. It */
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91 |
/* indicates that there is a delta for every point without needing to */
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92 |
/* enumerate all of them. */
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93 |
/* */
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94 |
#define ALL_POINTS (FT_UShort*)( -1 )
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95 |
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96 |
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97 |
#define GX_PT_POINTS_ARE_WORDS 0x80
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98 |
#define GX_PT_POINT_RUN_COUNT_MASK 0x7F
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99 |
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100 |
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101 |
/*************************************************************************/
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102 |
/* */
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103 |
/* <Function> */
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104 |
/* ft_var_readpackedpoints */
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105 |
/* */
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106 |
/* <Description> */
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107 |
/* Read a set of points to which the following deltas will apply. */
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108 |
/* Points are packed with a run length encoding. */
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109 |
/* */
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110 |
/* <Input> */
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111 |
/* stream :: The data stream. */
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112 |
/* */
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113 |
/* <Output> */
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114 |
/* point_cnt :: The number of points read. A zero value means that */
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115 |
/* all points in the glyph will be affected, without */
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116 |
/* enumerating them individually. */
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117 |
/* */
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118 |
/* <Return> */
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119 |
/* An array of FT_UShort containing the affected points or the */
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120 |
/* special value ALL_POINTS. */
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121 |
/* */
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122 |
static FT_UShort*
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123 |
ft_var_readpackedpoints( FT_Stream stream,
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124 |
FT_UInt *point_cnt )
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125 |
{
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126 |
FT_UShort *points;
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127 |
FT_Int n;
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128 |
FT_Int runcnt;
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129 |
FT_Int i;
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130 |
FT_Int j;
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131 |
FT_Int first;
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132 |
FT_Memory memory = stream->memory;
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133 |
FT_Error error = TT_Err_Ok;
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134 |
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135 |
FT_UNUSED( error );
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136 |
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137 |
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138 |
*point_cnt = n = FT_GET_BYTE();
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139 |
if ( n == 0 )
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140 |
return ALL_POINTS;
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141 |
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142 |
if ( n & GX_PT_POINTS_ARE_WORDS )
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143 |
n = FT_GET_BYTE() | ( ( n & GX_PT_POINT_RUN_COUNT_MASK ) << 8 );
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144 |
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145 |
if ( FT_NEW_ARRAY( points, n ) )
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146 |
return NULL;
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147 |
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148 |
i = 0;
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149 |
while ( i < n )
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150 |
{
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151 |
runcnt = FT_GET_BYTE();
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152 |
if ( runcnt & GX_PT_POINTS_ARE_WORDS )
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153 |
{
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154 |
runcnt = runcnt & GX_PT_POINT_RUN_COUNT_MASK;
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155 |
first = points[i++] = FT_GET_USHORT();
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156 |
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157 |
if ( runcnt < 1 || i + runcnt >= n )
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158 |
goto Exit;
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159 |
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160 |
/* first point not included in runcount */
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161 |
for ( j = 0; j < runcnt; ++j )
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162 |
points[i++] = (FT_UShort)( first += FT_GET_USHORT() );
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163 |
}
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164 |
else
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165 |
{
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166 |
first = points[i++] = FT_GET_BYTE();
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167 |
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168 |
if ( runcnt < 1 || i + runcnt >= n )
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169 |
goto Exit;
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170 |
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171 |
for ( j = 0; j < runcnt; ++j )
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172 |
points[i++] = (FT_UShort)( first += FT_GET_BYTE() );
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173 |
}
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174 |
}
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175 |
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176 |
Exit:
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177 |
return points;
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178 |
}
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179 |
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180 |
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181 |
enum
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182 |
{
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183 |
GX_DT_DELTAS_ARE_ZERO = 0x80,
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184 |
GX_DT_DELTAS_ARE_WORDS = 0x40,
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185 |
GX_DT_DELTA_RUN_COUNT_MASK = 0x3F
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186 |
};
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187 |
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188 |
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189 |
/*************************************************************************/
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190 |
/* */
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191 |
/* <Function> */
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192 |
/* ft_var_readpackeddeltas */
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193 |
/* */
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194 |
/* <Description> */
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195 |
/* Read a set of deltas. These are packed slightly differently than */
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196 |
/* points. In particular there is no overall count. */
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197 |
/* */
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198 |
/* <Input> */
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199 |
/* stream :: The data stream. */
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200 |
/* */
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201 |
/* delta_cnt :: The number of to be read. */
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202 |
/* */
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203 |
/* <Return> */
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204 |
/* An array of FT_Short containing the deltas for the affected */
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205 |
/* points. (This only gets the deltas for one dimension. It will */
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206 |
/* generally be called twice, once for x, once for y. When used in */
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207 |
/* cvt table, it will only be called once.) */
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208 |
/* */
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209 |
static FT_Short*
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210 |
ft_var_readpackeddeltas( FT_Stream stream,
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211 |
FT_Offset delta_cnt )
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212 |
{
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213 |
FT_Short *deltas = NULL;
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|
214 |
FT_UInt runcnt;
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215 |
FT_Offset i;
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|
216 |
FT_UInt j;
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217 |
FT_Memory memory = stream->memory;
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218 |
FT_Error error = TT_Err_Ok;
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219 |
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220 |
FT_UNUSED( error );
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221 |
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222 |
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223 |
if ( FT_NEW_ARRAY( deltas, delta_cnt ) )
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224 |
return NULL;
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225 |
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226 |
i = 0;
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227 |
while ( i < delta_cnt )
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|
228 |
{
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|
229 |
runcnt = FT_GET_BYTE();
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|
230 |
if ( runcnt & GX_DT_DELTAS_ARE_ZERO )
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231 |
{
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|
232 |
/* runcnt zeroes get added */
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|
233 |
for ( j = 0;
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|
234 |
j <= ( runcnt & GX_DT_DELTA_RUN_COUNT_MASK ) && i < delta_cnt;
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|
235 |
++j )
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|
236 |
deltas[i++] = 0;
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|
237 |
}
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|
238 |
else if ( runcnt & GX_DT_DELTAS_ARE_WORDS )
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|
239 |
{
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|
240 |
/* runcnt shorts from the stack */
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241 |
for ( j = 0;
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|
242 |
j <= ( runcnt & GX_DT_DELTA_RUN_COUNT_MASK ) && i < delta_cnt;
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243 |
++j )
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|
244 |
deltas[i++] = FT_GET_SHORT();
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|
245 |
}
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|
246 |
else
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|
247 |
{
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|
248 |
/* runcnt signed bytes from the stack */
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|
249 |
for ( j = 0;
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|
250 |
j <= ( runcnt & GX_DT_DELTA_RUN_COUNT_MASK ) && i < delta_cnt;
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251 |
++j )
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|
252 |
deltas[i++] = FT_GET_CHAR();
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253 |
}
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254 |
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255 |
if ( j <= ( runcnt & GX_DT_DELTA_RUN_COUNT_MASK ) )
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|
256 |
{
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257 |
/* Bad format */
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258 |
FT_FREE( deltas );
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|
259 |
return NULL;
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|
260 |
}
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|
261 |
}
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262 |
|
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|
263 |
return deltas;
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|
264 |
}
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265 |
|
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266 |
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|
267 |
/*************************************************************************/
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268 |
/* */
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|
269 |
/* <Function> */
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|
270 |
/* ft_var_load_avar */
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271 |
/* */
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|
272 |
/* <Description> */
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273 |
/* Parse the `avar' table if present. It need not be, so we return */
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274 |
/* nothing. */
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275 |
/* */
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276 |
/* <InOut> */
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277 |
/* face :: The font face. */
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278 |
/* */
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279 |
static void
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|
280 |
ft_var_load_avar( TT_Face face )
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|
281 |
{
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|
282 |
FT_Stream stream = FT_FACE_STREAM(face);
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|
283 |
FT_Memory memory = stream->memory;
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|
284 |
GX_Blend blend = face->blend;
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|
285 |
GX_AVarSegment segment;
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|
286 |
FT_Error error = TT_Err_Ok;
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|
287 |
FT_ULong version;
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|
288 |
FT_Long axisCount;
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|
289 |
FT_Int i, j;
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|
290 |
FT_ULong table_len;
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291 |
|
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|
292 |
FT_UNUSED( error );
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293 |
|
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|
294 |
|
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|
295 |
blend->avar_checked = TRUE;
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|
296 |
if ( (error = face->goto_table( face, TTAG_avar, stream, &table_len )) != 0 )
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|
297 |
return;
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|
298 |
|
|
|
299 |
if ( FT_FRAME_ENTER( table_len ) )
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|
300 |
return;
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|
301 |
|
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|
302 |
version = FT_GET_LONG();
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|
303 |
axisCount = FT_GET_LONG();
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|
304 |
|
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|
305 |
if ( version != 0x00010000L ||
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|
306 |
axisCount != (FT_Long)blend->mmvar->num_axis )
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|
307 |
goto Exit;
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|
|
308 |
|
|
|
309 |
if ( FT_NEW_ARRAY( blend->avar_segment, axisCount ) )
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|
310 |
goto Exit;
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|
311 |
|
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|
312 |
segment = &blend->avar_segment[0];
|
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|
313 |
for ( i = 0; i < axisCount; ++i, ++segment )
|
|
|
314 |
{
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|
|
315 |
segment->pairCount = FT_GET_USHORT();
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|
316 |
if ( FT_NEW_ARRAY( segment->correspondence, segment->pairCount ) )
|
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|
317 |
{
|
|
|
318 |
/* Failure. Free everything we have done so far. We must do */
|
|
|
319 |
/* it right now since loading the `avar' table is optional. */
|
|
|
320 |
|
|
|
321 |
for ( j = i - 1; j >= 0; --j )
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|
322 |
FT_FREE( blend->avar_segment[j].correspondence );
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323 |
|
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|
324 |
FT_FREE( blend->avar_segment );
|
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|
325 |
blend->avar_segment = NULL;
|
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|
326 |
goto Exit;
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|
|
327 |
}
|
|
|
328 |
|
|
|
329 |
for ( j = 0; j < segment->pairCount; ++j )
|
|
|
330 |
{
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|
331 |
segment->correspondence[j].fromCoord =
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|
332 |
FT_GET_SHORT() << 2; /* convert to Fixed */
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|
333 |
segment->correspondence[j].toCoord =
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|
|
334 |
FT_GET_SHORT()<<2; /* convert to Fixed */
|
|
|
335 |
}
|
|
|
336 |
}
|
|
|
337 |
|
|
|
338 |
Exit:
|
|
|
339 |
FT_FRAME_EXIT();
|
|
|
340 |
}
|
|
|
341 |
|
|
|
342 |
|
|
|
343 |
typedef struct GX_GVar_Head_
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|
|
344 |
{
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|
|
345 |
FT_Long version;
|
|
|
346 |
FT_UShort axisCount;
|
|
|
347 |
FT_UShort globalCoordCount;
|
|
|
348 |
FT_ULong offsetToCoord;
|
|
|
349 |
FT_UShort glyphCount;
|
|
|
350 |
FT_UShort flags;
|
|
|
351 |
FT_ULong offsetToData;
|
|
|
352 |
|
|
|
353 |
} GX_GVar_Head;
|
|
|
354 |
|
|
|
355 |
|
|
|
356 |
/*************************************************************************/
|
|
|
357 |
/* */
|
|
|
358 |
/* <Function> */
|
|
|
359 |
/* ft_var_load_gvar */
|
|
|
360 |
/* */
|
|
|
361 |
/* <Description> */
|
|
|
362 |
/* Parses the `gvar' table if present. If `fvar' is there, `gvar' */
|
|
|
363 |
/* had better be there too. */
|
|
|
364 |
/* */
|
|
|
365 |
/* <InOut> */
|
|
|
366 |
/* face :: The font face. */
|
|
|
367 |
/* */
|
|
|
368 |
/* <Return> */
|
|
|
369 |
/* FreeType error code. 0 means success. */
|
|
|
370 |
/* */
|
|
|
371 |
static FT_Error
|
|
|
372 |
ft_var_load_gvar( TT_Face face )
|
|
|
373 |
{
|
|
|
374 |
FT_Stream stream = FT_FACE_STREAM(face);
|
|
|
375 |
FT_Memory memory = stream->memory;
|
|
|
376 |
GX_Blend blend = face->blend;
|
|
|
377 |
FT_Error error;
|
|
|
378 |
FT_UInt i, j;
|
|
|
379 |
FT_ULong table_len;
|
|
|
380 |
FT_ULong gvar_start;
|
|
|
381 |
FT_ULong offsetToData;
|
|
|
382 |
GX_GVar_Head gvar_head;
|
|
|
383 |
|
|
|
384 |
static const FT_Frame_Field gvar_fields[] =
|
|
|
385 |
{
|
|
|
386 |
|
|
|
387 |
#undef FT_STRUCTURE
|
|
|
388 |
#define FT_STRUCTURE GX_GVar_Head
|
|
|
389 |
|
|
|
390 |
FT_FRAME_START( 20 ),
|
|
|
391 |
FT_FRAME_LONG ( version ),
|
|
|
392 |
FT_FRAME_USHORT( axisCount ),
|
|
|
393 |
FT_FRAME_USHORT( globalCoordCount ),
|
|
|
394 |
FT_FRAME_ULONG ( offsetToCoord ),
|
|
|
395 |
FT_FRAME_USHORT( glyphCount ),
|
|
|
396 |
FT_FRAME_USHORT( flags ),
|
|
|
397 |
FT_FRAME_ULONG ( offsetToData ),
|
|
|
398 |
FT_FRAME_END
|
|
|
399 |
};
|
|
|
400 |
|
|
|
401 |
if ( (error = face->goto_table( face, TTAG_gvar, stream, &table_len )) != 0 )
|
|
|
402 |
goto Exit;
|
|
|
403 |
|
|
|
404 |
gvar_start = FT_STREAM_POS( );
|
|
|
405 |
if ( FT_STREAM_READ_FIELDS( gvar_fields, &gvar_head ) )
|
|
|
406 |
goto Exit;
|
|
|
407 |
|
|
|
408 |
blend->tuplecount = gvar_head.globalCoordCount;
|
|
|
409 |
blend->gv_glyphcnt = gvar_head.glyphCount;
|
|
|
410 |
offsetToData = gvar_start + gvar_head.offsetToData;
|
|
|
411 |
|
|
|
412 |
if ( gvar_head.version != (FT_Long)0x00010000L ||
|
|
|
413 |
gvar_head.axisCount != (FT_UShort)blend->mmvar->num_axis )
|
|
|
414 |
{
|
|
|
415 |
error = TT_Err_Invalid_Table;
|
|
|
416 |
goto Exit;
|
|
|
417 |
}
|
|
|
418 |
|
|
|
419 |
if ( FT_NEW_ARRAY( blend->glyphoffsets, blend->gv_glyphcnt + 1 ) )
|
|
|
420 |
goto Exit;
|
|
|
421 |
|
|
|
422 |
if ( gvar_head.flags & 1 )
|
|
|
423 |
{
|
|
|
424 |
/* long offsets (one more offset than glyphs, to mark size of last) */
|
|
|
425 |
if ( FT_FRAME_ENTER( ( blend->gv_glyphcnt + 1 ) * 4L ) )
|
|
|
426 |
goto Exit;
|
|
|
427 |
|
|
|
428 |
for ( i = 0; i <= blend->gv_glyphcnt; ++i )
|
|
|
429 |
blend->glyphoffsets[i] = offsetToData + FT_GET_LONG();
|
|
|
430 |
|
|
|
431 |
FT_FRAME_EXIT();
|
|
|
432 |
}
|
|
|
433 |
else
|
|
|
434 |
{
|
|
|
435 |
/* short offsets (one more offset than glyphs, to mark size of last) */
|
|
|
436 |
if ( FT_FRAME_ENTER( ( blend->gv_glyphcnt + 1 ) * 2L ) )
|
|
|
437 |
goto Exit;
|
|
|
438 |
|
|
|
439 |
for ( i = 0; i <= blend->gv_glyphcnt; ++i )
|
|
|
440 |
blend->glyphoffsets[i] = offsetToData + FT_GET_USHORT() * 2;
|
|
|
441 |
/* XXX: Undocumented: `*2'! */
|
|
|
442 |
|
|
|
443 |
FT_FRAME_EXIT();
|
|
|
444 |
}
|
|
|
445 |
|
|
|
446 |
if ( blend->tuplecount != 0 )
|
|
|
447 |
{
|
|
|
448 |
if ( FT_NEW_ARRAY( blend->tuplecoords,
|
|
|
449 |
gvar_head.axisCount * blend->tuplecount ) )
|
|
|
450 |
goto Exit;
|
|
|
451 |
|
|
|
452 |
if ( FT_STREAM_SEEK( gvar_start + gvar_head.offsetToCoord ) ||
|
|
|
453 |
FT_FRAME_ENTER( blend->tuplecount * gvar_head.axisCount * 2L ) )
|
|
|
454 |
goto Exit;
|
|
|
455 |
|
|
|
456 |
for ( i = 0; i < blend->tuplecount; ++i )
|
|
|
457 |
for ( j = 0 ; j < (FT_UInt)gvar_head.axisCount; ++j )
|
|
|
458 |
blend->tuplecoords[i * gvar_head.axisCount + j] =
|
|
|
459 |
FT_GET_SHORT() << 2; /* convert to FT_Fixed */
|
|
|
460 |
|
|
|
461 |
FT_FRAME_EXIT();
|
|
|
462 |
}
|
|
|
463 |
|
|
|
464 |
Exit:
|
|
|
465 |
return error;
|
|
|
466 |
}
|
|
|
467 |
|
|
|
468 |
|
|
|
469 |
/*************************************************************************/
|
|
|
470 |
/* */
|
|
|
471 |
/* <Function> */
|
|
|
472 |
/* ft_var_apply_tuple */
|
|
|
473 |
/* */
|
|
|
474 |
/* <Description> */
|
|
|
475 |
/* Figure out whether a given tuple (design) applies to the current */
|
|
|
476 |
/* blend, and if so, what is the scaling factor. */
|
|
|
477 |
/* */
|
|
|
478 |
/* <Input> */
|
|
|
479 |
/* blend :: The current blend of the font. */
|
|
|
480 |
/* */
|
|
|
481 |
/* tupleIndex :: A flag saying whether this is an intermediate */
|
|
|
482 |
/* tuple or not. */
|
|
|
483 |
/* */
|
|
|
484 |
/* tuple_coords :: The coordinates of the tuple in normalized axis */
|
|
|
485 |
/* units. */
|
|
|
486 |
/* */
|
|
|
487 |
/* im_start_coords :: The initial coordinates where this tuple starts */
|
|
|
488 |
/* to apply (for intermediate coordinates). */
|
|
|
489 |
/* */
|
|
|
490 |
/* im_end_coords :: The final coordinates after which this tuple no */
|
|
|
491 |
/* longer applies (for intermediate coordinates). */
|
|
|
492 |
/* */
|
|
|
493 |
/* <Return> */
|
|
|
494 |
/* An FT_Fixed value containing the scaling factor. */
|
|
|
495 |
/* */
|
|
|
496 |
static FT_Fixed
|
|
|
497 |
ft_var_apply_tuple( GX_Blend blend,
|
|
|
498 |
FT_UShort tupleIndex,
|
|
|
499 |
FT_Fixed* tuple_coords,
|
|
|
500 |
FT_Fixed* im_start_coords,
|
|
|
501 |
FT_Fixed* im_end_coords )
|
|
|
502 |
{
|
|
|
503 |
FT_UInt i;
|
|
|
504 |
FT_Fixed apply;
|
|
|
505 |
FT_Fixed temp;
|
|
|
506 |
|
|
|
507 |
|
|
|
508 |
apply = 0x10000L;
|
|
|
509 |
for ( i = 0; i < blend->num_axis; ++i )
|
|
|
510 |
{
|
|
|
511 |
if ( tuple_coords[i] == 0 )
|
|
|
512 |
/* It's not clear why (for intermediate tuples) we don't need */
|
|
|
513 |
/* to check against start/end -- the documentation says we don't. */
|
|
|
514 |
/* Similarly, it's unclear why we don't need to scale along the */
|
|
|
515 |
/* axis. */
|
|
|
516 |
continue;
|
|
|
517 |
|
|
|
518 |
else if ( blend->normalizedcoords[i] == 0 ||
|
|
|
519 |
( blend->normalizedcoords[i] < 0 && tuple_coords[i] > 0 ) ||
|
|
|
520 |
( blend->normalizedcoords[i] > 0 && tuple_coords[i] < 0 ) )
|
|
|
521 |
{
|
|
|
522 |
apply = 0;
|
|
|
523 |
break;
|
|
|
524 |
}
|
|
|
525 |
|
|
|
526 |
else if ( !( tupleIndex & GX_TI_INTERMEDIATE_TUPLE ) )
|
|
|
527 |
/* not an intermediate tuple */
|
|
|
528 |
apply = FT_MulDiv( apply,
|
|
|
529 |
blend->normalizedcoords[i] > 0
|
|
|
530 |
? blend->normalizedcoords[i]
|
|
|
531 |
: -blend->normalizedcoords[i],
|
|
|
532 |
0x10000L );
|
|
|
533 |
|
|
|
534 |
else if ( blend->normalizedcoords[i] <= im_start_coords[i] ||
|
|
|
535 |
blend->normalizedcoords[i] >= im_end_coords[i] )
|
|
|
536 |
{
|
|
|
537 |
apply = 0;
|
|
|
538 |
break;
|
|
|
539 |
}
|
|
|
540 |
|
|
|
541 |
else if ( blend->normalizedcoords[i] < tuple_coords[i] )
|
|
|
542 |
{
|
|
|
543 |
temp = FT_MulDiv( blend->normalizedcoords[i] - im_start_coords[i],
|
|
|
544 |
0x10000L,
|
|
|
545 |
tuple_coords[i] - im_start_coords[i]);
|
|
|
546 |
apply = FT_MulDiv( apply, temp, 0x10000L );
|
|
|
547 |
}
|
|
|
548 |
|
|
|
549 |
else
|
|
|
550 |
{
|
|
|
551 |
temp = FT_MulDiv( im_end_coords[i] - blend->normalizedcoords[i],
|
|
|
552 |
0x10000L,
|
|
|
553 |
im_end_coords[i] - tuple_coords[i] );
|
|
|
554 |
apply = FT_MulDiv( apply, temp, 0x10000L );
|
|
|
555 |
}
|
|
|
556 |
}
|
|
|
557 |
|
|
|
558 |
return apply;
|
|
|
559 |
}
|
|
|
560 |
|
|
|
561 |
|
|
|
562 |
/*************************************************************************/
|
|
|
563 |
/*************************************************************************/
|
|
|
564 |
/***** *****/
|
|
|
565 |
/***** MULTIPLE MASTERS SERVICE FUNCTIONS *****/
|
|
|
566 |
/***** *****/
|
|
|
567 |
/*************************************************************************/
|
|
|
568 |
/*************************************************************************/
|
|
|
569 |
|
|
|
570 |
|
|
|
571 |
typedef struct GX_FVar_Head_
|
|
|
572 |
{
|
|
|
573 |
FT_Long version;
|
|
|
574 |
FT_UShort offsetToData;
|
|
|
575 |
FT_UShort countSizePairs;
|
|
|
576 |
FT_UShort axisCount;
|
|
|
577 |
FT_UShort axisSize;
|
|
|
578 |
FT_UShort instanceCount;
|
|
|
579 |
FT_UShort instanceSize;
|
|
|
580 |
|
|
|
581 |
} GX_FVar_Head;
|
|
|
582 |
|
|
|
583 |
|
|
|
584 |
typedef struct fvar_axis_
|
|
|
585 |
{
|
|
|
586 |
FT_ULong axisTag;
|
|
|
587 |
FT_ULong minValue;
|
|
|
588 |
FT_ULong defaultValue;
|
|
|
589 |
FT_ULong maxValue;
|
|
|
590 |
FT_UShort flags;
|
|
|
591 |
FT_UShort nameID;
|
|
|
592 |
|
|
|
593 |
} GX_FVar_Axis;
|
|
|
594 |
|
|
|
595 |
|
|
|
596 |
/*************************************************************************/
|
|
|
597 |
/* */
|
|
|
598 |
/* <Function> */
|
|
|
599 |
/* TT_Get_MM_Var */
|
|
|
600 |
/* */
|
|
|
601 |
/* <Description> */
|
|
|
602 |
/* Check that the font's `fvar' table is valid, parse it, and return */
|
|
|
603 |
/* those data. */
|
|
|
604 |
/* */
|
|
|
605 |
/* <InOut> */
|
|
|
606 |
/* face :: The font face. */
|
|
|
607 |
/* TT_Get_MM_Var initializes the blend structure. */
|
|
|
608 |
/* */
|
|
|
609 |
/* <Output> */
|
|
|
610 |
/* master :: The `fvar' data (must be freed by caller). */
|
|
|
611 |
/* */
|
|
|
612 |
/* <Return> */
|
|
|
613 |
/* FreeType error code. 0 means success. */
|
|
|
614 |
/* */
|
|
|
615 |
FT_LOCAL_DEF( FT_Error )
|
|
|
616 |
TT_Get_MM_Var( TT_Face face,
|
|
|
617 |
FT_MM_Var* *master )
|
|
|
618 |
{
|
|
|
619 |
FT_Stream stream = face->root.stream;
|
|
|
620 |
FT_Memory memory = face->root.memory;
|
|
|
621 |
FT_ULong table_len;
|
|
|
622 |
FT_Error error = TT_Err_Ok;
|
|
|
623 |
FT_ULong fvar_start;
|
|
|
624 |
FT_Int i, j;
|
|
|
625 |
FT_MM_Var* mmvar;
|
|
|
626 |
FT_Fixed* next_coords;
|
|
|
627 |
FT_String* next_name;
|
|
|
628 |
FT_Var_Axis* a;
|
|
|
629 |
FT_Var_Named_Style* ns;
|
|
|
630 |
GX_FVar_Head fvar_head;
|
|
|
631 |
|
|
|
632 |
static const FT_Frame_Field fvar_fields[] =
|
|
|
633 |
{
|
|
|
634 |
|
|
|
635 |
#undef FT_STRUCTURE
|
|
|
636 |
#define FT_STRUCTURE GX_FVar_Head
|
|
|
637 |
|
|
|
638 |
FT_FRAME_START( 16 ),
|
|
|
639 |
FT_FRAME_LONG ( version ),
|
|
|
640 |
FT_FRAME_USHORT( offsetToData ),
|
|
|
641 |
FT_FRAME_USHORT( countSizePairs ),
|
|
|
642 |
FT_FRAME_USHORT( axisCount ),
|
|
|
643 |
FT_FRAME_USHORT( axisSize ),
|
|
|
644 |
FT_FRAME_USHORT( instanceCount ),
|
|
|
645 |
FT_FRAME_USHORT( instanceSize ),
|
|
|
646 |
FT_FRAME_END
|
|
|
647 |
};
|
|
|
648 |
|
|
|
649 |
static const FT_Frame_Field fvaraxis_fields[] =
|
|
|
650 |
{
|
|
|
651 |
|
|
|
652 |
#undef FT_STRUCTURE
|
|
|
653 |
#define FT_STRUCTURE GX_FVar_Axis
|
|
|
654 |
|
|
|
655 |
FT_FRAME_START( 20 ),
|
|
|
656 |
FT_FRAME_ULONG ( axisTag ),
|
|
|
657 |
FT_FRAME_ULONG ( minValue ),
|
|
|
658 |
FT_FRAME_ULONG ( defaultValue ),
|
|
|
659 |
FT_FRAME_ULONG ( maxValue ),
|
|
|
660 |
FT_FRAME_USHORT( flags ),
|
|
|
661 |
FT_FRAME_USHORT( nameID ),
|
|
|
662 |
FT_FRAME_END
|
|
|
663 |
};
|
|
|
664 |
|
|
|
665 |
|
|
|
666 |
if ( face->blend == NULL )
|
|
|
667 |
{
|
|
|
668 |
/* both `fvar' and `gvar' must be present */
|
|
|
669 |
if ( (error = face->goto_table( face, TTAG_gvar,
|
|
|
670 |
stream, &table_len )) != 0 )
|
|
|
671 |
goto Exit;
|
|
|
672 |
|
|
|
673 |
if ( (error = face->goto_table( face, TTAG_fvar,
|
|
|
674 |
stream, &table_len )) != 0 )
|
|
|
675 |
goto Exit;
|
|
|
676 |
|
|
|
677 |
fvar_start = FT_STREAM_POS( );
|
|
|
678 |
|
|
|
679 |
if ( FT_STREAM_READ_FIELDS( fvar_fields, &fvar_head ) )
|
|
|
680 |
goto Exit;
|
|
|
681 |
|
|
|
682 |
if ( fvar_head.version != (FT_Long)0x00010000L ||
|
|
|
683 |
fvar_head.countSizePairs != 2 ||
|
|
|
684 |
fvar_head.axisSize != 20 ||
|
|
|
685 |
/* axisCount limit implied by 16-bit instanceSize */
|
|
|
686 |
fvar_head.axisCount > 0x3FFE ||
|
|
|
687 |
fvar_head.instanceSize != 4 + 4 * fvar_head.axisCount ||
|
|
|
688 |
/* instanceCount limit implied by limited range of name IDs */
|
|
|
689 |
fvar_head.instanceCount > 0x7EFF ||
|
|
|
690 |
fvar_head.offsetToData + fvar_head.axisCount * 20U +
|
|
|
691 |
fvar_head.instanceCount * fvar_head.instanceSize > table_len )
|
|
|
692 |
{
|
|
|
693 |
error = TT_Err_Invalid_Table;
|
|
|
694 |
goto Exit;
|
|
|
695 |
}
|
|
|
696 |
|
|
|
697 |
if ( FT_NEW( face->blend ) )
|
|
|
698 |
goto Exit;
|
|
|
699 |
|
|
|
700 |
/* cannot overflow 32-bit arithmetic because of limits above */
|
|
|
701 |
face->blend->mmvar_len =
|
|
|
702 |
sizeof ( FT_MM_Var ) +
|
|
|
703 |
fvar_head.axisCount * sizeof ( FT_Var_Axis ) +
|
|
|
704 |
fvar_head.instanceCount * sizeof ( FT_Var_Named_Style ) +
|
|
|
705 |
fvar_head.instanceCount * fvar_head.axisCount * sizeof ( FT_Fixed ) +
|
|
|
706 |
5 * fvar_head.axisCount;
|
|
|
707 |
|
|
|
708 |
if ( FT_ALLOC( mmvar, face->blend->mmvar_len ) )
|
|
|
709 |
goto Exit;
|
|
|
710 |
face->blend->mmvar = mmvar;
|
|
|
711 |
|
|
|
712 |
mmvar->num_axis =
|
|
|
713 |
fvar_head.axisCount;
|
|
|
714 |
mmvar->num_designs =
|
|
|
715 |
(FT_UInt)-1; /* meaningless in this context; each glyph */
|
|
|
716 |
/* may have a different number of designs */
|
|
|
717 |
/* (or tuples, as called by Apple) */
|
|
|
718 |
mmvar->num_namedstyles =
|
|
|
719 |
fvar_head.instanceCount;
|
|
|
720 |
mmvar->axis =
|
|
|
721 |
(FT_Var_Axis*)&(mmvar[1]);
|
|
|
722 |
mmvar->namedstyle =
|
|
|
723 |
(FT_Var_Named_Style*)&(mmvar->axis[fvar_head.axisCount]);
|
|
|
724 |
|
|
|
725 |
next_coords =
|
|
|
726 |
(FT_Fixed*)&(mmvar->namedstyle[fvar_head.instanceCount]);
|
|
|
727 |
for ( i = 0; i < fvar_head.instanceCount; ++i )
|
|
|
728 |
{
|
|
|
729 |
mmvar->namedstyle[i].coords = next_coords;
|
|
|
730 |
next_coords += fvar_head.axisCount;
|
|
|
731 |
}
|
|
|
732 |
|
|
|
733 |
next_name = (FT_String*)next_coords;
|
|
|
734 |
for ( i = 0; i < fvar_head.axisCount; ++i )
|
|
|
735 |
{
|
|
|
736 |
mmvar->axis[i].name = next_name;
|
|
|
737 |
next_name += 5;
|
|
|
738 |
}
|
|
|
739 |
|
|
|
740 |
if ( FT_STREAM_SEEK( fvar_start + fvar_head.offsetToData ) )
|
|
|
741 |
goto Exit;
|
|
|
742 |
|
|
|
743 |
a = mmvar->axis;
|
|
|
744 |
for ( i = 0; i < fvar_head.axisCount; ++i )
|
|
|
745 |
{
|
|
|
746 |
GX_FVar_Axis axis_rec;
|
|
|
747 |
|
|
|
748 |
|
|
|
749 |
if ( FT_STREAM_READ_FIELDS( fvaraxis_fields, &axis_rec ) )
|
|
|
750 |
goto Exit;
|
|
|
751 |
a->tag = axis_rec.axisTag;
|
|
|
752 |
a->minimum = axis_rec.minValue; /* A Fixed */
|
|
|
753 |
a->def = axis_rec.defaultValue; /* A Fixed */
|
|
|
754 |
a->maximum = axis_rec.maxValue; /* A Fixed */
|
|
|
755 |
a->strid = axis_rec.nameID;
|
|
|
756 |
|
|
|
757 |
a->name[0] = (FT_String)( a->tag >> 24 );
|
|
|
758 |
a->name[1] = (FT_String)( ( a->tag >> 16 ) & 0xFF );
|
|
|
759 |
a->name[2] = (FT_String)( ( a->tag >> 8 ) & 0xFF );
|
|
|
760 |
a->name[3] = (FT_String)( ( a->tag ) & 0xFF );
|
|
|
761 |
a->name[4] = 0;
|
|
|
762 |
|
|
|
763 |
++a;
|
|
|
764 |
}
|
|
|
765 |
|
|
|
766 |
ns = mmvar->namedstyle;
|
|
|
767 |
for ( i = 0; i < fvar_head.instanceCount; ++i, ++ns )
|
|
|
768 |
{
|
|
|
769 |
if ( FT_FRAME_ENTER( 4L + 4L * fvar_head.axisCount ) )
|
|
|
770 |
goto Exit;
|
|
|
771 |
|
|
|
772 |
ns->strid = FT_GET_USHORT();
|
|
|
773 |
(void) /* flags = */ FT_GET_USHORT();
|
|
|
774 |
|
|
|
775 |
for ( j = 0; j < fvar_head.axisCount; ++j )
|
|
|
776 |
ns->coords[j] = FT_GET_ULONG(); /* A Fixed */
|
|
|
777 |
|
|
|
778 |
FT_FRAME_EXIT();
|
|
|
779 |
}
|
|
|
780 |
}
|
|
|
781 |
|
|
|
782 |
if ( master != NULL )
|
|
|
783 |
{
|
|
|
784 |
FT_UInt n;
|
|
|
785 |
|
|
|
786 |
|
|
|
787 |
if ( FT_ALLOC( mmvar, face->blend->mmvar_len ) )
|
|
|
788 |
goto Exit;
|
|
|
789 |
FT_MEM_COPY( mmvar, face->blend->mmvar, face->blend->mmvar_len );
|
|
|
790 |
|
|
|
791 |
mmvar->axis =
|
|
|
792 |
(FT_Var_Axis*)&(mmvar[1]);
|
|
|
793 |
mmvar->namedstyle =
|
|
|
794 |
(FT_Var_Named_Style*)&(mmvar->axis[mmvar->num_axis]);
|
|
|
795 |
next_coords =
|
|
|
796 |
(FT_Fixed*)&(mmvar->namedstyle[mmvar->num_namedstyles]);
|
|
|
797 |
|
|
|
798 |
for ( n = 0; n < mmvar->num_namedstyles; ++n )
|
|
|
799 |
{
|
|
|
800 |
mmvar->namedstyle[n].coords = next_coords;
|
|
|
801 |
next_coords += mmvar->num_axis;
|
|
|
802 |
}
|
|
|
803 |
|
|
|
804 |
a = mmvar->axis;
|
|
|
805 |
next_name = (FT_String*)next_coords;
|
|
|
806 |
for ( n = 0; n < mmvar->num_axis; ++n )
|
|
|
807 |
{
|
|
|
808 |
a->name = next_name;
|
|
|
809 |
|
|
|
810 |
/* standard PostScript names for some standard apple tags */
|
|
|
811 |
if ( a->tag == TTAG_wght )
|
|
|
812 |
a->name = (char *)"Weight";
|
|
|
813 |
else if ( a->tag == TTAG_wdth )
|
|
|
814 |
a->name = (char *)"Width";
|
|
|
815 |
else if ( a->tag == TTAG_opsz )
|
|
|
816 |
a->name = (char *)"OpticalSize";
|
|
|
817 |
else if ( a->tag == TTAG_slnt )
|
|
|
818 |
a->name = (char *)"Slant";
|
|
|
819 |
|
|
|
820 |
next_name += 5;
|
|
|
821 |
++a;
|
|
|
822 |
}
|
|
|
823 |
|
|
|
824 |
*master = mmvar;
|
|
|
825 |
}
|
|
|
826 |
|
|
|
827 |
Exit:
|
|
|
828 |
return error;
|
|
|
829 |
}
|
|
|
830 |
|
|
|
831 |
|
|
|
832 |
/*************************************************************************/
|
|
|
833 |
/* */
|
|
|
834 |
/* <Function> */
|
|
|
835 |
/* TT_Set_MM_Blend */
|
|
|
836 |
/* */
|
|
|
837 |
/* <Description> */
|
|
|
838 |
/* Set the blend (normalized) coordinates for this instance of the */
|
|
|
839 |
/* font. Check that the `gvar' table is reasonable and does some */
|
|
|
840 |
/* initial preparation. */
|
|
|
841 |
/* */
|
|
|
842 |
/* <InOut> */
|
|
|
843 |
/* face :: The font. */
|
|
|
844 |
/* Initialize the blend structure with `gvar' data. */
|
|
|
845 |
/* */
|
|
|
846 |
/* <Input> */
|
|
|
847 |
/* num_coords :: Must be the axis count of the font. */
|
|
|
848 |
/* */
|
|
|
849 |
/* coords :: An array of num_coords, each between [-1,1]. */
|
|
|
850 |
/* */
|
|
|
851 |
/* <Return> */
|
|
|
852 |
/* FreeType error code. 0 means success. */
|
|
|
853 |
/* */
|
|
|
854 |
FT_LOCAL_DEF( FT_Error )
|
|
|
855 |
TT_Set_MM_Blend( TT_Face face,
|
|
|
856 |
FT_UInt num_coords,
|
|
|
857 |
FT_Fixed* coords )
|
|
|
858 |
{
|
|
|
859 |
FT_Error error = TT_Err_Ok;
|
|
|
860 |
GX_Blend blend;
|
|
|
861 |
FT_MM_Var* mmvar;
|
|
|
862 |
FT_UInt i;
|
|
|
863 |
FT_Memory memory = face->root.memory;
|
|
|
864 |
|
|
|
865 |
enum
|
|
|
866 |
{
|
|
|
867 |
mcvt_retain,
|
|
|
868 |
mcvt_modify,
|
|
|
869 |
mcvt_load
|
|
|
870 |
|
|
|
871 |
} manageCvt;
|
|
|
872 |
|
|
|
873 |
|
|
|
874 |
face->doblend = FALSE;
|
|
|
875 |
|
|
|
876 |
if ( face->blend == NULL )
|
|
|
877 |
{
|
|
|
878 |
if ( (error = TT_Get_MM_Var( face, NULL)) != 0 )
|
|
|
879 |
goto Exit;
|
|
|
880 |
}
|
|
|
881 |
|
|
|
882 |
blend = face->blend;
|
|
|
883 |
mmvar = blend->mmvar;
|
|
|
884 |
|
|
|
885 |
if ( num_coords != mmvar->num_axis )
|
|
|
886 |
{
|
|
|
887 |
error = TT_Err_Invalid_Argument;
|
|
|
888 |
goto Exit;
|
|
|
889 |
}
|
|
|
890 |
|
|
|
891 |
for ( i = 0; i < num_coords; ++i )
|
|
|
892 |
if ( coords[i] < -0x00010000L || coords[i] > 0x00010000L )
|
|
|
893 |
{
|
|
|
894 |
error = TT_Err_Invalid_Argument;
|
|
|
895 |
goto Exit;
|
|
|
896 |
}
|
|
|
897 |
|
|
|
898 |
if ( blend->glyphoffsets == NULL )
|
|
|
899 |
if ( (error = ft_var_load_gvar( face )) != 0 )
|
|
|
900 |
goto Exit;
|
|
|
901 |
|
|
|
902 |
if ( blend->normalizedcoords == NULL )
|
|
|
903 |
{
|
|
|
904 |
if ( FT_NEW_ARRAY( blend->normalizedcoords, num_coords ) )
|
|
|
905 |
goto Exit;
|
|
|
906 |
|
|
|
907 |
manageCvt = mcvt_modify;
|
|
|
908 |
|
|
|
909 |
/* If we have not set the blend coordinates before this, then the */
|
|
|
910 |
/* cvt table will still be what we read from the `cvt ' table and */
|
|
|
911 |
/* we don't need to reload it. We may need to change it though... */
|
|
|
912 |
}
|
|
|
913 |
else
|
|
|
914 |
{
|
|
|
915 |
manageCvt = mcvt_retain;
|
|
|
916 |
for ( i = 0; i < num_coords; ++i )
|
|
|
917 |
{
|
|
|
918 |
if ( blend->normalizedcoords[i] != coords[i] )
|
|
|
919 |
{
|
|
|
920 |
manageCvt = mcvt_load;
|
|
|
921 |
break;
|
|
|
922 |
}
|
|
|
923 |
}
|
|
|
924 |
|
|
|
925 |
/* If we don't change the blend coords then we don't need to do */
|
|
|
926 |
/* anything to the cvt table. It will be correct. Otherwise we */
|
|
|
927 |
/* no longer have the original cvt (it was modified when we set */
|
|
|
928 |
/* the blend last time), so we must reload and then modify it. */
|
|
|
929 |
}
|
|
|
930 |
|
|
|
931 |
blend->num_axis = num_coords;
|
|
|
932 |
FT_MEM_COPY( blend->normalizedcoords,
|
|
|
933 |
coords,
|
|
|
934 |
num_coords * sizeof ( FT_Fixed ) );
|
|
|
935 |
|
|
|
936 |
face->doblend = TRUE;
|
|
|
937 |
|
|
|
938 |
if ( face->cvt != NULL )
|
|
|
939 |
{
|
|
|
940 |
switch ( manageCvt )
|
|
|
941 |
{
|
|
|
942 |
case mcvt_load:
|
|
|
943 |
/* The cvt table has been loaded already; every time we change the */
|
|
|
944 |
/* blend we may need to reload and remodify the cvt table. */
|
|
|
945 |
FT_FREE( face->cvt );
|
|
|
946 |
face->cvt = NULL;
|
|
|
947 |
|
|
|
948 |
tt_face_load_cvt( face, face->root.stream );
|
|
|
949 |
break;
|
|
|
950 |
|
|
|
951 |
case mcvt_modify:
|
|
|
952 |
/* The original cvt table is in memory. All we need to do is */
|
|
|
953 |
/* apply the `cvar' table (if any). */
|
|
|
954 |
tt_face_vary_cvt( face, face->root.stream );
|
|
|
955 |
break;
|
|
|
956 |
|
|
|
957 |
case mcvt_retain:
|
|
|
958 |
/* The cvt table is correct for this set of coordinates. */
|
|
|
959 |
break;
|
|
|
960 |
}
|
|
|
961 |
}
|
|
|
962 |
|
|
|
963 |
Exit:
|
|
|
964 |
return error;
|
|
|
965 |
}
|
|
|
966 |
|
|
|
967 |
|
|
|
968 |
/*************************************************************************/
|
|
|
969 |
/* */
|
|
|
970 |
/* <Function> */
|
|
|
971 |
/* TT_Set_Var_Design */
|
|
|
972 |
/* */
|
|
|
973 |
/* <Description> */
|
|
|
974 |
/* Set the coordinates for the instance, measured in the user */
|
|
|
975 |
/* coordinate system. Parse the `avar' table (if present) to convert */
|
|
|
976 |
/* from user to normalized coordinates. */
|
|
|
977 |
/* */
|
|
|
978 |
/* <InOut> */
|
|
|
979 |
/* face :: The font face. */
|
|
|
980 |
/* Initialize the blend struct with `gvar' data. */
|
|
|
981 |
/* */
|
|
|
982 |
/* <Input> */
|
|
|
983 |
/* num_coords :: This must be the axis count of the font. */
|
|
|
984 |
/* */
|
|
|
985 |
/* coords :: A coordinate array with `num_coords' elements. */
|
|
|
986 |
/* */
|
|
|
987 |
/* <Return> */
|
|
|
988 |
/* FreeType error code. 0 means success. */
|
|
|
989 |
/* */
|
|
|
990 |
FT_LOCAL_DEF( FT_Error )
|
|
|
991 |
TT_Set_Var_Design( TT_Face face,
|
|
|
992 |
FT_UInt num_coords,
|
|
|
993 |
FT_Fixed* coords )
|
|
|
994 |
{
|
|
|
995 |
FT_Error error = TT_Err_Ok;
|
|
|
996 |
FT_Fixed* normalized = NULL;
|
|
|
997 |
GX_Blend blend;
|
|
|
998 |
FT_MM_Var* mmvar;
|
|
|
999 |
FT_UInt i, j;
|
|
|
1000 |
FT_Var_Axis* a;
|
|
|
1001 |
GX_AVarSegment av;
|
|
|
1002 |
FT_Memory memory = face->root.memory;
|
|
|
1003 |
|
|
|
1004 |
|
|
|
1005 |
if ( face->blend == NULL )
|
|
|
1006 |
{
|
|
|
1007 |
if ( (error = TT_Get_MM_Var( face, NULL )) != 0 )
|
|
|
1008 |
goto Exit;
|
|
|
1009 |
}
|
|
|
1010 |
|
|
|
1011 |
blend = face->blend;
|
|
|
1012 |
mmvar = blend->mmvar;
|
|
|
1013 |
|
|
|
1014 |
if ( num_coords != mmvar->num_axis )
|
|
|
1015 |
{
|
|
|
1016 |
error = TT_Err_Invalid_Argument;
|
|
|
1017 |
goto Exit;
|
|
|
1018 |
}
|
|
|
1019 |
|
|
|
1020 |
/* Axis normalization is a two stage process. First we normalize */
|
|
|
1021 |
/* based on the [min,def,max] values for the axis to be [-1,0,1]. */
|
|
|
1022 |
/* Then, if there's an `avar' table, we renormalize this range. */
|
|
|
1023 |
|
|
|
1024 |
if ( FT_NEW_ARRAY( normalized, mmvar->num_axis ) )
|
|
|
1025 |
goto Exit;
|
|
|
1026 |
|
|
|
1027 |
a = mmvar->axis;
|
|
|
1028 |
for ( i = 0; i < mmvar->num_axis; ++i, ++a )
|
|
|
1029 |
{
|
|
|
1030 |
if ( coords[i] > a->maximum || coords[i] < a->minimum )
|
|
|
1031 |
{
|
|
|
1032 |
error = TT_Err_Invalid_Argument;
|
|
|
1033 |
goto Exit;
|
|
|
1034 |
}
|
|
|
1035 |
|
|
|
1036 |
if ( coords[i] < a->def )
|
|
|
1037 |
{
|
|
|
1038 |
normalized[i] = -FT_MulDiv( coords[i] - a->def,
|
|
|
1039 |
0x10000L,
|
|
|
1040 |
a->minimum - a->def );
|
|
|
1041 |
}
|
|
|
1042 |
else if ( a->maximum == a->def )
|
|
|
1043 |
normalized[i] = 0;
|
|
|
1044 |
else
|
|
|
1045 |
{
|
|
|
1046 |
normalized[i] = FT_MulDiv( coords[i] - a->def,
|
|
|
1047 |
0x10000L,
|
|
|
1048 |
a->maximum - a->def );
|
|
|
1049 |
}
|
|
|
1050 |
}
|
|
|
1051 |
|
|
|
1052 |
if ( !blend->avar_checked )
|
|
|
1053 |
ft_var_load_avar( face );
|
|
|
1054 |
|
|
|
1055 |
if ( blend->avar_segment != NULL )
|
|
|
1056 |
{
|
|
|
1057 |
av = blend->avar_segment;
|
|
|
1058 |
for ( i = 0; i < mmvar->num_axis; ++i, ++av )
|
|
|
1059 |
{
|
|
|
1060 |
for ( j = 1; j < (FT_UInt)av->pairCount; ++j )
|
|
|
1061 |
if ( normalized[i] < av->correspondence[j].fromCoord )
|
|
|
1062 |
{
|
|
|
1063 |
normalized[i] =
|
|
|
1064 |
FT_MulDiv(
|
|
|
1065 |
FT_MulDiv(
|
|
|
1066 |
normalized[i] - av->correspondence[j - 1].fromCoord,
|
|
|
1067 |
0x10000L,
|
|
|
1068 |
av->correspondence[j].fromCoord -
|
|
|
1069 |
av->correspondence[j - 1].fromCoord ),
|
|
|
1070 |
av->correspondence[j].toCoord -
|
|
|
1071 |
av->correspondence[j - 1].toCoord,
|
|
|
1072 |
0x10000L ) +
|
|
|
1073 |
av->correspondence[j - 1].toCoord;
|
|
|
1074 |
break;
|
|
|
1075 |
}
|
|
|
1076 |
}
|
|
|
1077 |
}
|
|
|
1078 |
|
|
|
1079 |
error = TT_Set_MM_Blend( face, num_coords, normalized );
|
|
|
1080 |
|
|
|
1081 |
Exit:
|
|
|
1082 |
FT_FREE( normalized );
|
|
|
1083 |
return error;
|
|
|
1084 |
}
|
|
|
1085 |
|
|
|
1086 |
|
|
|
1087 |
/*************************************************************************/
|
|
|
1088 |
/*************************************************************************/
|
|
|
1089 |
/***** *****/
|
|
|
1090 |
/***** GX VAR PARSING ROUTINES *****/
|
|
|
1091 |
/***** *****/
|
|
|
1092 |
/*************************************************************************/
|
|
|
1093 |
/*************************************************************************/
|
|
|
1094 |
|
|
|
1095 |
|
|
|
1096 |
/*************************************************************************/
|
|
|
1097 |
/* */
|
|
|
1098 |
/* <Function> */
|
|
|
1099 |
/* tt_face_vary_cvt */
|
|
|
1100 |
/* */
|
|
|
1101 |
/* <Description> */
|
|
|
1102 |
/* Modify the loaded cvt table according to the `cvar' table and the */
|
|
|
1103 |
/* font's blend. */
|
|
|
1104 |
/* */
|
|
|
1105 |
/* <InOut> */
|
|
|
1106 |
/* face :: A handle to the target face object. */
|
|
|
1107 |
/* */
|
|
|
1108 |
/* <Input> */
|
|
|
1109 |
/* stream :: A handle to the input stream. */
|
|
|
1110 |
/* */
|
|
|
1111 |
/* <Return> */
|
|
|
1112 |
/* FreeType error code. 0 means success. */
|
|
|
1113 |
/* */
|
|
|
1114 |
/* Most errors are ignored. It is perfectly valid not to have a */
|
|
|
1115 |
/* `cvar' table even if there is a `gvar' and `fvar' table. */
|
|
|
1116 |
/* */
|
|
|
1117 |
FT_LOCAL_DEF( FT_Error )
|
|
|
1118 |
tt_face_vary_cvt( TT_Face face,
|
|
|
1119 |
FT_Stream stream )
|
|
|
1120 |
{
|
|
|
1121 |
FT_Error error;
|
|
|
1122 |
FT_Memory memory = stream->memory;
|
|
|
1123 |
FT_ULong table_start;
|
|
|
1124 |
FT_ULong table_len;
|
|
|
1125 |
FT_UInt tupleCount;
|
|
|
1126 |
FT_ULong offsetToData;
|
|
|
1127 |
FT_ULong here;
|
|
|
1128 |
FT_UInt i, j;
|
|
|
1129 |
FT_Fixed* tuple_coords = NULL;
|
|
|
1130 |
FT_Fixed* im_start_coords = NULL;
|
|
|
1131 |
FT_Fixed* im_end_coords = NULL;
|
|
|
1132 |
GX_Blend blend = face->blend;
|
|
|
1133 |
FT_UInt point_count;
|
|
|
1134 |
FT_UShort* localpoints;
|
|
|
1135 |
FT_Short* deltas;
|
|
|
1136 |
|
|
|
1137 |
|
|
|
1138 |
FT_TRACE2(( "CVAR " ));
|
|
|
1139 |
|
|
|
1140 |
if ( blend == NULL )
|
|
|
1141 |
{
|
|
|
1142 |
FT_TRACE2(( "tt_face_vary_cvt: no blend specified\n" ));
|
|
|
1143 |
|
|
|
1144 |
error = TT_Err_Ok;
|
|
|
1145 |
goto Exit;
|
|
|
1146 |
}
|
|
|
1147 |
|
|
|
1148 |
if ( face->cvt == NULL )
|
|
|
1149 |
{
|
|
|
1150 |
FT_TRACE2(( "tt_face_vary_cvt: no `cvt ' table\n" ));
|
|
|
1151 |
|
|
|
1152 |
error = TT_Err_Ok;
|
|
|
1153 |
goto Exit;
|
|
|
1154 |
}
|
|
|
1155 |
|
|
|
1156 |
error = face->goto_table( face, TTAG_cvar, stream, &table_len );
|
|
|
1157 |
if ( error )
|
|
|
1158 |
{
|
|
|
1159 |
FT_TRACE2(( "is missing\n" ));
|
|
|
1160 |
|
|
|
1161 |
error = TT_Err_Ok;
|
|
|
1162 |
goto Exit;
|
|
|
1163 |
}
|
|
|
1164 |
|
|
|
1165 |
if ( FT_FRAME_ENTER( table_len ) )
|
|
|
1166 |
{
|
|
|
1167 |
error = TT_Err_Ok;
|
|
|
1168 |
goto Exit;
|
|
|
1169 |
}
|
|
|
1170 |
|
|
|
1171 |
table_start = FT_Stream_FTell( stream );
|
|
|
1172 |
if ( FT_GET_LONG() != 0x00010000L )
|
|
|
1173 |
{
|
|
|
1174 |
FT_TRACE2(( "bad table version\n" ));
|
|
|
1175 |
|
|
|
1176 |
error = TT_Err_Ok;
|
|
|
1177 |
goto FExit;
|
|
|
1178 |
}
|
|
|
1179 |
|
|
|
1180 |
if ( FT_NEW_ARRAY( tuple_coords, blend->num_axis ) ||
|
|
|
1181 |
FT_NEW_ARRAY( im_start_coords, blend->num_axis ) ||
|
|
|
1182 |
FT_NEW_ARRAY( im_end_coords, blend->num_axis ) )
|
|
|
1183 |
goto FExit;
|
|
|
1184 |
|
|
|
1185 |
tupleCount = FT_GET_USHORT();
|
|
|
1186 |
offsetToData = table_start + FT_GET_USHORT();
|
|
|
1187 |
|
|
|
1188 |
/* The documentation implies there are flags packed into the */
|
|
|
1189 |
/* tuplecount, but John Jenkins says that shared points don't apply */
|
|
|
1190 |
/* to `cvar', and no other flags are defined. */
|
|
|
1191 |
|
|
|
1192 |
for ( i = 0; i < ( tupleCount & 0xFFF ); ++i )
|
|
|
1193 |
{
|
|
|
1194 |
FT_UInt tupleDataSize;
|
|
|
1195 |
FT_UInt tupleIndex;
|
|
|
1196 |
FT_Fixed apply;
|
|
|
1197 |
|
|
|
1198 |
|
|
|
1199 |
tupleDataSize = FT_GET_USHORT();
|
|
|
1200 |
tupleIndex = FT_GET_USHORT();
|
|
|
1201 |
|
|
|
1202 |
/* There is no provision here for a global tuple coordinate section, */
|
|
|
1203 |
/* so John says. There are no tuple indices, just embedded tuples. */
|
|
|
1204 |
|
|
|
1205 |
if ( tupleIndex & GX_TI_EMBEDDED_TUPLE_COORD )
|
|
|
1206 |
{
|
|
|
1207 |
for ( j = 0; j < blend->num_axis; ++j )
|
|
|
1208 |
tuple_coords[j] = FT_GET_SHORT() << 2; /* convert from */
|
|
|
1209 |
/* short frac to fixed */
|
|
|
1210 |
}
|
|
|
1211 |
else
|
|
|
1212 |
{
|
|
|
1213 |
/* skip this tuple; it makes no sense */
|
|
|
1214 |
|
|
|
1215 |
if ( tupleIndex & GX_TI_INTERMEDIATE_TUPLE )
|
|
|
1216 |
for ( j = 0; j < 2 * blend->num_axis; ++j )
|
|
|
1217 |
(void)FT_GET_SHORT();
|
|
|
1218 |
|
|
|
1219 |
offsetToData += tupleDataSize;
|
|
|
1220 |
continue;
|
|
|
1221 |
}
|
|
|
1222 |
|
|
|
1223 |
if ( tupleIndex & GX_TI_INTERMEDIATE_TUPLE )
|
|
|
1224 |
{
|
|
|
1225 |
for ( j = 0; j < blend->num_axis; ++j )
|
|
|
1226 |
im_start_coords[j] = FT_GET_SHORT() << 2;
|
|
|
1227 |
for ( j = 0; j < blend->num_axis; ++j )
|
|
|
1228 |
im_end_coords[j] = FT_GET_SHORT() << 2;
|
|
|
1229 |
}
|
|
|
1230 |
|
|
|
1231 |
apply = ft_var_apply_tuple( blend,
|
|
|
1232 |
(FT_UShort)tupleIndex,
|
|
|
1233 |
tuple_coords,
|
|
|
1234 |
im_start_coords,
|
|
|
1235 |
im_end_coords );
|
|
|
1236 |
if ( /* tuple isn't active for our blend */
|
|
|
1237 |
apply == 0 ||
|
|
|
1238 |
/* global points not allowed, */
|
|
|
1239 |
/* if they aren't local, makes no sense */
|
|
|
1240 |
!( tupleIndex & GX_TI_PRIVATE_POINT_NUMBERS ) )
|
|
|
1241 |
{
|
|
|
1242 |
offsetToData += tupleDataSize;
|
|
|
1243 |
continue;
|
|
|
1244 |
}
|
|
|
1245 |
|
|
|
1246 |
here = FT_Stream_FTell( stream );
|
|
|
1247 |
|
|
|
1248 |
FT_Stream_SeekSet( stream, offsetToData );
|
|
|
1249 |
|
|
|
1250 |
localpoints = ft_var_readpackedpoints( stream, &point_count );
|
|
|
1251 |
deltas = ft_var_readpackeddeltas( stream,
|
|
|
1252 |
point_count == 0 ? face->cvt_size
|
|
|
1253 |
: point_count );
|
|
|
1254 |
if ( localpoints == NULL || deltas == NULL )
|
|
|
1255 |
/* failure, ignore it */;
|
|
|
1256 |
|
|
|
1257 |
else if ( localpoints == ALL_POINTS )
|
|
|
1258 |
{
|
|
|
1259 |
/* this means that there are deltas for every entry in cvt */
|
|
|
1260 |
for ( j = 0; j < face->cvt_size; ++j )
|
|
|
1261 |
face->cvt[j] = (FT_Short)( face->cvt[j] +
|
|
|
1262 |
FT_MulFix( deltas[j], apply ) );
|
|
|
1263 |
}
|
|
|
1264 |
|
|
|
1265 |
else
|
|
|
1266 |
{
|
|
|
1267 |
for ( j = 0; j < point_count; ++j )
|
|
|
1268 |
{
|
|
|
1269 |
int pindex = localpoints[j];
|
|
|
1270 |
|
|
|
1271 |
face->cvt[pindex] = (FT_Short)( face->cvt[pindex] +
|
|
|
1272 |
FT_MulFix( deltas[j], apply ) );
|
|
|
1273 |
}
|
|
|
1274 |
}
|
|
|
1275 |
|
|
|
1276 |
if ( localpoints != ALL_POINTS )
|
|
|
1277 |
FT_FREE( localpoints );
|
|
|
1278 |
FT_FREE( deltas );
|
|
|
1279 |
|
|
|
1280 |
offsetToData += tupleDataSize;
|
|
|
1281 |
|
|
|
1282 |
FT_Stream_SeekSet( stream, here );
|
|
|
1283 |
}
|
|
|
1284 |
|
|
|
1285 |
FExit:
|
|
|
1286 |
FT_FRAME_EXIT();
|
|
|
1287 |
|
|
|
1288 |
Exit:
|
|
|
1289 |
FT_FREE( tuple_coords );
|
|
|
1290 |
FT_FREE( im_start_coords );
|
|
|
1291 |
FT_FREE( im_end_coords );
|
|
|
1292 |
|
|
|
1293 |
return error;
|
|
|
1294 |
}
|
|
|
1295 |
|
|
|
1296 |
|
|
|
1297 |
/*************************************************************************/
|
|
|
1298 |
/* */
|
|
|
1299 |
/* <Function> */
|
|
|
1300 |
/* TT_Vary_Get_Glyph_Deltas */
|
|
|
1301 |
/* */
|
|
|
1302 |
/* <Description> */
|
|
|
1303 |
/* Load the appropriate deltas for the current glyph. */
|
|
|
1304 |
/* */
|
|
|
1305 |
/* <Input> */
|
|
|
1306 |
/* face :: A handle to the target face object. */
|
|
|
1307 |
/* */
|
|
|
1308 |
/* glyph_index :: The index of the glyph being modified. */
|
|
|
1309 |
/* */
|
|
|
1310 |
/* n_points :: The number of the points in the glyph, including */
|
|
|
1311 |
/* phantom points. */
|
|
|
1312 |
/* */
|
|
|
1313 |
/* <Output> */
|
|
|
1314 |
/* deltas :: The array of points to change. */
|
|
|
1315 |
/* */
|
|
|
1316 |
/* <Return> */
|
|
|
1317 |
/* FreeType error code. 0 means success. */
|
|
|
1318 |
/* */
|
|
|
1319 |
FT_LOCAL_DEF( FT_Error )
|
|
|
1320 |
TT_Vary_Get_Glyph_Deltas( TT_Face face,
|
|
|
1321 |
FT_UInt glyph_index,
|
|
|
1322 |
FT_Vector* *deltas,
|
|
|
1323 |
FT_UInt n_points )
|
|
|
1324 |
{
|
|
|
1325 |
FT_Stream stream = face->root.stream;
|
|
|
1326 |
FT_Memory memory = stream->memory;
|
|
|
1327 |
GX_Blend blend = face->blend;
|
|
|
1328 |
FT_Vector* delta_xy;
|
|
|
1329 |
|
|
|
1330 |
FT_Error error;
|
|
|
1331 |
FT_ULong glyph_start;
|
|
|
1332 |
FT_UInt tupleCount;
|
|
|
1333 |
FT_ULong offsetToData;
|
|
|
1334 |
FT_ULong here;
|
|
|
1335 |
FT_UInt i, j;
|
|
|
1336 |
FT_Fixed* tuple_coords = NULL;
|
|
|
1337 |
FT_Fixed* im_start_coords = NULL;
|
|
|
1338 |
FT_Fixed* im_end_coords = NULL;
|
|
|
1339 |
FT_UInt point_count, spoint_count = 0;
|
|
|
1340 |
FT_UShort* sharedpoints = NULL;
|
|
|
1341 |
FT_UShort* localpoints = NULL;
|
|
|
1342 |
FT_UShort* points;
|
|
|
1343 |
FT_Short *deltas_x, *deltas_y;
|
|
|
1344 |
|
|
|
1345 |
|
|
|
1346 |
if ( !face->doblend || blend == NULL )
|
|
|
1347 |
return TT_Err_Invalid_Argument;
|
|
|
1348 |
|
|
|
1349 |
/* to be freed by the caller */
|
|
|
1350 |
if ( FT_NEW_ARRAY( delta_xy, n_points ) )
|
|
|
1351 |
goto Exit;
|
|
|
1352 |
*deltas = delta_xy;
|
|
|
1353 |
|
|
|
1354 |
if ( glyph_index >= blend->gv_glyphcnt ||
|
|
|
1355 |
blend->glyphoffsets[glyph_index] ==
|
|
|
1356 |
blend->glyphoffsets[glyph_index + 1] )
|
|
|
1357 |
return TT_Err_Ok; /* no variation data for this glyph */
|
|
|
1358 |
|
|
|
1359 |
if ( FT_STREAM_SEEK( blend->glyphoffsets[glyph_index] ) ||
|
|
|
1360 |
FT_FRAME_ENTER( blend->glyphoffsets[glyph_index + 1] -
|
|
|
1361 |
blend->glyphoffsets[glyph_index] ) )
|
|
|
1362 |
goto Fail1;
|
|
|
1363 |
|
|
|
1364 |
glyph_start = FT_Stream_FTell( stream );
|
|
|
1365 |
|
|
|
1366 |
/* each set of glyph variation data is formatted similarly to `cvar' */
|
|
|
1367 |
/* (except we get shared points and global tuples) */
|
|
|
1368 |
|
|
|
1369 |
if ( FT_NEW_ARRAY( tuple_coords, blend->num_axis ) ||
|
|
|
1370 |
FT_NEW_ARRAY( im_start_coords, blend->num_axis ) ||
|
|
|
1371 |
FT_NEW_ARRAY( im_end_coords, blend->num_axis ) )
|
|
|
1372 |
goto Fail2;
|
|
|
1373 |
|
|
|
1374 |
tupleCount = FT_GET_USHORT();
|
|
|
1375 |
offsetToData = glyph_start + FT_GET_USHORT();
|
|
|
1376 |
|
|
|
1377 |
if ( tupleCount & GX_TC_TUPLES_SHARE_POINT_NUMBERS )
|
|
|
1378 |
{
|
|
|
1379 |
here = FT_Stream_FTell( stream );
|
|
|
1380 |
|
|
|
1381 |
FT_Stream_SeekSet( stream, offsetToData );
|
|
|
1382 |
|
|
|
1383 |
sharedpoints = ft_var_readpackedpoints( stream, &spoint_count );
|
|
|
1384 |
offsetToData = FT_Stream_FTell( stream );
|
|
|
1385 |
|
|
|
1386 |
FT_Stream_SeekSet( stream, here );
|
|
|
1387 |
}
|
|
|
1388 |
|
|
|
1389 |
for ( i = 0; i < ( tupleCount & GX_TC_TUPLE_COUNT_MASK ); ++i )
|
|
|
1390 |
{
|
|
|
1391 |
FT_UInt tupleDataSize;
|
|
|
1392 |
FT_UInt tupleIndex;
|
|
|
1393 |
FT_Fixed apply;
|
|
|
1394 |
|
|
|
1395 |
|
|
|
1396 |
tupleDataSize = FT_GET_USHORT();
|
|
|
1397 |
tupleIndex = FT_GET_USHORT();
|
|
|
1398 |
|
|
|
1399 |
if ( tupleIndex & GX_TI_EMBEDDED_TUPLE_COORD )
|
|
|
1400 |
{
|
|
|
1401 |
for ( j = 0; j < blend->num_axis; ++j )
|
|
|
1402 |
tuple_coords[j] = FT_GET_SHORT() << 2; /* convert from */
|
|
|
1403 |
/* short frac to fixed */
|
|
|
1404 |
}
|
|
|
1405 |
else if ( ( tupleIndex & GX_TI_TUPLE_INDEX_MASK ) >= blend->tuplecount )
|
|
|
1406 |
{
|
|
|
1407 |
error = TT_Err_Invalid_Table;
|
|
|
1408 |
goto Fail3;
|
|
|
1409 |
}
|
|
|
1410 |
else
|
|
|
1411 |
{
|
|
|
1412 |
FT_MEM_COPY(
|
|
|
1413 |
tuple_coords,
|
|
|
1414 |
&blend->tuplecoords[(tupleIndex & 0xFFF) * blend->num_axis],
|
|
|
1415 |
blend->num_axis * sizeof ( FT_Fixed ) );
|
|
|
1416 |
}
|
|
|
1417 |
|
|
|
1418 |
if ( tupleIndex & GX_TI_INTERMEDIATE_TUPLE )
|
|
|
1419 |
{
|
|
|
1420 |
for ( j = 0; j < blend->num_axis; ++j )
|
|
|
1421 |
im_start_coords[j] = FT_GET_SHORT() << 2;
|
|
|
1422 |
for ( j = 0; j < blend->num_axis; ++j )
|
|
|
1423 |
im_end_coords[j] = FT_GET_SHORT() << 2;
|
|
|
1424 |
}
|
|
|
1425 |
|
|
|
1426 |
apply = ft_var_apply_tuple( blend,
|
|
|
1427 |
(FT_UShort)tupleIndex,
|
|
|
1428 |
tuple_coords,
|
|
|
1429 |
im_start_coords,
|
|
|
1430 |
im_end_coords );
|
|
|
1431 |
|
|
|
1432 |
if ( apply == 0 ) /* tuple isn't active for our blend */
|
|
|
1433 |
{
|
|
|
1434 |
offsetToData += tupleDataSize;
|
|
|
1435 |
continue;
|
|
|
1436 |
}
|
|
|
1437 |
|
|
|
1438 |
here = FT_Stream_FTell( stream );
|
|
|
1439 |
|
|
|
1440 |
if ( tupleIndex & GX_TI_PRIVATE_POINT_NUMBERS )
|
|
|
1441 |
{
|
|
|
1442 |
FT_Stream_SeekSet( stream, offsetToData );
|
|
|
1443 |
|
|
|
1444 |
localpoints = ft_var_readpackedpoints( stream, &point_count );
|
|
|
1445 |
points = localpoints;
|
|
|
1446 |
}
|
|
|
1447 |
else
|
|
|
1448 |
{
|
|
|
1449 |
points = sharedpoints;
|
|
|
1450 |
point_count = spoint_count;
|
|
|
1451 |
}
|
|
|
1452 |
|
|
|
1453 |
deltas_x = ft_var_readpackeddeltas( stream,
|
|
|
1454 |
point_count == 0 ? n_points
|
|
|
1455 |
: point_count );
|
|
|
1456 |
deltas_y = ft_var_readpackeddeltas( stream,
|
|
|
1457 |
point_count == 0 ? n_points
|
|
|
1458 |
: point_count );
|
|
|
1459 |
|
|
|
1460 |
if ( points == NULL || deltas_y == NULL || deltas_x == NULL )
|
|
|
1461 |
; /* failure, ignore it */
|
|
|
1462 |
|
|
|
1463 |
else if ( points == ALL_POINTS )
|
|
|
1464 |
{
|
|
|
1465 |
/* this means that there are deltas for every point in the glyph */
|
|
|
1466 |
for ( j = 0; j < n_points; ++j )
|
|
|
1467 |
{
|
|
|
1468 |
delta_xy[j].x += FT_MulFix( deltas_x[j], apply );
|
|
|
1469 |
delta_xy[j].y += FT_MulFix( deltas_y[j], apply );
|
|
|
1470 |
}
|
|
|
1471 |
}
|
|
|
1472 |
|
|
|
1473 |
else
|
|
|
1474 |
{
|
|
|
1475 |
for ( j = 0; j < point_count; ++j )
|
|
|
1476 |
{
|
|
|
1477 |
delta_xy[localpoints[j]].x += FT_MulFix( deltas_x[j], apply );
|
|
|
1478 |
delta_xy[localpoints[j]].y += FT_MulFix( deltas_y[j], apply );
|
|
|
1479 |
}
|
|
|
1480 |
}
|
|
|
1481 |
|
|
|
1482 |
if ( localpoints != ALL_POINTS )
|
|
|
1483 |
FT_FREE( localpoints );
|
|
|
1484 |
FT_FREE( deltas_x );
|
|
|
1485 |
FT_FREE( deltas_y );
|
|
|
1486 |
|
|
|
1487 |
offsetToData += tupleDataSize;
|
|
|
1488 |
|
|
|
1489 |
FT_Stream_SeekSet( stream, here );
|
|
|
1490 |
}
|
|
|
1491 |
|
|
|
1492 |
Fail3:
|
|
|
1493 |
FT_FREE( tuple_coords );
|
|
|
1494 |
FT_FREE( im_start_coords );
|
|
|
1495 |
FT_FREE( im_end_coords );
|
|
|
1496 |
|
|
|
1497 |
Fail2:
|
|
|
1498 |
FT_FRAME_EXIT();
|
|
|
1499 |
|
|
|
1500 |
Fail1:
|
|
|
1501 |
if ( error )
|
|
|
1502 |
{
|
|
|
1503 |
FT_FREE( delta_xy );
|
|
|
1504 |
*deltas = NULL;
|
|
|
1505 |
}
|
|
|
1506 |
|
|
|
1507 |
Exit:
|
|
|
1508 |
return error;
|
|
|
1509 |
}
|
|
|
1510 |
|
|
|
1511 |
|
|
|
1512 |
/*************************************************************************/
|
|
|
1513 |
/* */
|
|
|
1514 |
/* <Function> */
|
|
|
1515 |
/* tt_done_blend */
|
|
|
1516 |
/* */
|
|
|
1517 |
/* <Description> */
|
|
|
1518 |
/* Frees the blend internal data structure. */
|
|
|
1519 |
/* */
|
|
|
1520 |
FT_LOCAL_DEF( void )
|
|
|
1521 |
tt_done_blend( FT_Memory memory,
|
|
|
1522 |
GX_Blend blend )
|
|
|
1523 |
{
|
|
|
1524 |
if ( blend != NULL )
|
|
|
1525 |
{
|
|
|
1526 |
FT_UInt i;
|
|
|
1527 |
|
|
|
1528 |
|
|
|
1529 |
FT_FREE( blend->normalizedcoords );
|
|
|
1530 |
FT_FREE( blend->mmvar );
|
|
|
1531 |
|
|
|
1532 |
if ( blend->avar_segment != NULL )
|
|
|
1533 |
{
|
|
|
1534 |
for ( i = 0; i < blend->num_axis; ++i )
|
|
|
1535 |
FT_FREE( blend->avar_segment[i].correspondence );
|
|
|
1536 |
FT_FREE( blend->avar_segment );
|
|
|
1537 |
}
|
|
|
1538 |
|
|
|
1539 |
FT_FREE( blend->tuplecoords );
|
|
|
1540 |
FT_FREE( blend->glyphoffsets );
|
|
|
1541 |
FT_FREE( blend );
|
|
|
1542 |
}
|
|
|
1543 |
}
|
|
|
1544 |
|
|
|
1545 |
#endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */
|
|
|
1546 |
|
|
|
1547 |
|
|
|
1548 |
/* END */
|