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/***************************************************************************/
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/* */
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/* ttgload.c */
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/* */
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/* TrueType Glyph Loader (body). */
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/* */
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/* Copyright 1996-2011 */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* 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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#include <ft2build.h>
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#include FT_INTERNAL_DEBUG_H
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#include FT_INTERNAL_CALC_H
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#include FT_INTERNAL_STREAM_H
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#include FT_INTERNAL_SFNT_H
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#include FT_TRUETYPE_TAGS_H
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#include FT_OUTLINE_H
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#include "ttgload.h"
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#include "ttpload.h"
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#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
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#include "ttgxvar.h"
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#endif
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#include "tterrors.h"
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/*************************************************************************/
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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_ttgload
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/*************************************************************************/
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/* */
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/* Composite glyph flags. */
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/* */
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#define ARGS_ARE_WORDS 0x0001
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#define ARGS_ARE_XY_VALUES 0x0002
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#define ROUND_XY_TO_GRID 0x0004
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#define WE_HAVE_A_SCALE 0x0008
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/* reserved 0x0010 */
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#define MORE_COMPONENTS 0x0020
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#define WE_HAVE_AN_XY_SCALE 0x0040
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#define WE_HAVE_A_2X2 0x0080
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#define WE_HAVE_INSTR 0x0100
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#define USE_MY_METRICS 0x0200
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#define OVERLAP_COMPOUND 0x0400
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#define SCALED_COMPONENT_OFFSET 0x0800
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#define UNSCALED_COMPONENT_OFFSET 0x1000
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/*************************************************************************/
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/* */
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/* Return the horizontal metrics in font units for a given glyph. */
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/* */
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FT_LOCAL_DEF( void )
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TT_Get_HMetrics( TT_Face face,
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FT_UInt idx,
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FT_Short* lsb,
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FT_UShort* aw )
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{
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( (SFNT_Service)face->sfnt )->get_metrics( face, 0, idx, lsb, aw );
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FT_TRACE5(( " advance width (font units): %d\n", *aw ));
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FT_TRACE5(( " left side bearing (font units): %d\n", *lsb ));
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}
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/*************************************************************************/
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/* */
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/* Return the vertical metrics in font units for a given glyph. */
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/* Greg Hitchcock from Microsoft told us that if there were no `vmtx' */
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/* table, typoAscender/Descender from the `OS/2' table would be used */
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/* instead, and if there were no `OS/2' table, use ascender/descender */
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/* from the `hhea' table. But that is not what Microsoft's rasterizer */
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/* apparently does: It uses the ppem value as the advance height, and */
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/* sets the top side bearing to be zero. */
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/* */
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FT_LOCAL_DEF( void )
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TT_Get_VMetrics( TT_Face face,
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FT_UInt idx,
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FT_Short* tsb,
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FT_UShort* ah )
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{
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if ( face->vertical_info )
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( (SFNT_Service)face->sfnt )->get_metrics( face, 1, idx, tsb, ah );
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#if 1 /* Empirically determined, at variance with what MS said */
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103 |
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else
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{
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*tsb = 0;
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*ah = face->root.units_per_EM;
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}
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109 |
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#else /* This is what MS said to do. It isn't what they do, however. */
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111 |
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else if ( face->os2.version != 0xFFFFU )
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{
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*tsb = face->os2.sTypoAscender;
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*ah = face->os2.sTypoAscender - face->os2.sTypoDescender;
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}
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else
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{
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119 |
*tsb = face->horizontal.Ascender;
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120 |
*ah = face->horizontal.Ascender - face->horizontal.Descender;
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121 |
}
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122 |
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#endif
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124 |
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125 |
FT_TRACE5(( " advance height (font units): %d\n", *ah ));
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126 |
FT_TRACE5(( " top side bearing (font units): %d\n", *tsb ));
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}
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128 |
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129 |
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static void
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131 |
tt_get_metrics( TT_Loader loader,
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FT_UInt glyph_index )
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133 |
{
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134 |
TT_Face face = (TT_Face)loader->face;
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135 |
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136 |
FT_Short left_bearing = 0, top_bearing = 0;
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137 |
FT_UShort advance_width = 0, advance_height = 0;
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138 |
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139 |
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140 |
TT_Get_HMetrics( face, glyph_index,
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141 |
&left_bearing,
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&advance_width );
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143 |
TT_Get_VMetrics( face, glyph_index,
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&top_bearing,
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&advance_height );
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146 |
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147 |
loader->left_bearing = left_bearing;
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148 |
loader->advance = advance_width;
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149 |
loader->top_bearing = top_bearing;
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150 |
loader->vadvance = advance_height;
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151 |
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152 |
if ( !loader->linear_def )
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{
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154 |
loader->linear_def = 1;
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loader->linear = advance_width;
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}
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157 |
}
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158 |
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159 |
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160 |
#ifdef FT_CONFIG_OPTION_INCREMENTAL
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161 |
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162 |
static void
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tt_get_metrics_incr_overrides( TT_Loader loader,
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164 |
FT_UInt glyph_index )
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165 |
{
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TT_Face face = (TT_Face)loader->face;
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167 |
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FT_Short left_bearing = 0, top_bearing = 0;
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FT_UShort advance_width = 0, advance_height = 0;
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170 |
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171 |
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172 |
/* If this is an incrementally loaded font check whether there are */
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/* overriding metrics for this glyph. */
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if ( face->root.internal->incremental_interface &&
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face->root.internal->incremental_interface->funcs->get_glyph_metrics )
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176 |
{
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177 |
FT_Incremental_MetricsRec metrics;
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FT_Error error;
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179 |
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180 |
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metrics.bearing_x = loader->left_bearing;
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metrics.bearing_y = 0;
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metrics.advance = loader->advance;
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metrics.advance_v = 0;
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185 |
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error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
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face->root.internal->incremental_interface->object,
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188 |
glyph_index, FALSE, &metrics );
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189 |
if ( error )
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190 |
goto Exit;
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191 |
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192 |
left_bearing = (FT_Short)metrics.bearing_x;
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193 |
advance_width = (FT_UShort)metrics.advance;
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194 |
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195 |
#if 0
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196 |
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197 |
/* GWW: Do I do the same for vertical metrics? */
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metrics.bearing_x = 0;
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199 |
metrics.bearing_y = loader->top_bearing;
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200 |
metrics.advance = loader->vadvance;
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201 |
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error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
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face->root.internal->incremental_interface->object,
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204 |
glyph_index, TRUE, &metrics );
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205 |
if ( error )
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206 |
goto Exit;
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207 |
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208 |
top_bearing = (FT_Short)metrics.bearing_y;
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209 |
advance_height = (FT_UShort)metrics.advance;
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210 |
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211 |
#endif /* 0 */
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212 |
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213 |
loader->left_bearing = left_bearing;
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214 |
loader->advance = advance_width;
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215 |
loader->top_bearing = top_bearing;
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216 |
loader->vadvance = advance_height;
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217 |
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218 |
if ( !loader->linear_def )
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219 |
{
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220 |
loader->linear_def = 1;
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221 |
loader->linear = advance_width;
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222 |
}
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223 |
}
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224 |
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225 |
Exit:
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226 |
return;
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227 |
}
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228 |
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229 |
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
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230 |
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231 |
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232 |
/*************************************************************************/
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233 |
/* */
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234 |
/* Translates an array of coordinates. */
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235 |
/* */
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236 |
static void
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237 |
translate_array( FT_UInt n,
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238 |
FT_Vector* coords,
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239 |
FT_Pos delta_x,
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240 |
FT_Pos delta_y )
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241 |
{
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242 |
FT_UInt k;
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243 |
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244 |
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245 |
if ( delta_x )
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246 |
for ( k = 0; k < n; k++ )
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247 |
coords[k].x += delta_x;
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248 |
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249 |
if ( delta_y )
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250 |
for ( k = 0; k < n; k++ )
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251 |
coords[k].y += delta_y;
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252 |
}
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253 |
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254 |
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255 |
#undef IS_HINTED
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256 |
#define IS_HINTED( flags ) ( ( flags & FT_LOAD_NO_HINTING ) == 0 )
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257 |
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258 |
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259 |
/*************************************************************************/
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260 |
/* */
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261 |
/* The following functions are used by default with TrueType fonts. */
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262 |
/* However, they can be replaced by alternatives if we need to support */
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263 |
/* TrueType-compressed formats (like MicroType) in the future. */
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264 |
/* */
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265 |
/*************************************************************************/
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266 |
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267 |
FT_CALLBACK_DEF( FT_Error )
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268 |
TT_Access_Glyph_Frame( TT_Loader loader,
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269 |
FT_UInt glyph_index,
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270 |
FT_ULong offset,
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271 |
FT_UInt byte_count )
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272 |
{
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273 |
FT_Error error;
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274 |
FT_Stream stream = loader->stream;
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275 |
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276 |
/* for non-debug mode */
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277 |
FT_UNUSED( glyph_index );
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278 |
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279 |
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280 |
FT_TRACE4(( "Glyph %ld\n", glyph_index ));
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281 |
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282 |
/* the following line sets the `error' variable through macros! */
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283 |
if ( FT_STREAM_SEEK( offset ) || FT_FRAME_ENTER( byte_count ) )
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284 |
return error;
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285 |
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286 |
loader->cursor = stream->cursor;
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287 |
loader->limit = stream->limit;
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288 |
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289 |
return TT_Err_Ok;
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290 |
}
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291 |
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292 |
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293 |
FT_CALLBACK_DEF( void )
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294 |
TT_Forget_Glyph_Frame( TT_Loader loader )
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295 |
{
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296 |
FT_Stream stream = loader->stream;
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297 |
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298 |
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299 |
FT_FRAME_EXIT();
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300 |
}
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301 |
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302 |
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303 |
FT_CALLBACK_DEF( FT_Error )
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304 |
TT_Load_Glyph_Header( TT_Loader loader )
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305 |
{
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306 |
FT_Byte* p = loader->cursor;
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307 |
FT_Byte* limit = loader->limit;
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308 |
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309 |
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310 |
if ( p + 10 > limit )
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311 |
return TT_Err_Invalid_Outline;
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312 |
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313 |
loader->n_contours = FT_NEXT_SHORT( p );
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314 |
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315 |
loader->bbox.xMin = FT_NEXT_SHORT( p );
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316 |
loader->bbox.yMin = FT_NEXT_SHORT( p );
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317 |
loader->bbox.xMax = FT_NEXT_SHORT( p );
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318 |
loader->bbox.yMax = FT_NEXT_SHORT( p );
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319 |
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320 |
FT_TRACE5(( " # of contours: %d\n", loader->n_contours ));
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321 |
FT_TRACE5(( " xMin: %4d xMax: %4d\n", loader->bbox.xMin,
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322 |
loader->bbox.xMax ));
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323 |
FT_TRACE5(( " yMin: %4d yMax: %4d\n", loader->bbox.yMin,
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324 |
loader->bbox.yMax ));
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325 |
loader->cursor = p;
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326 |
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327 |
return TT_Err_Ok;
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|
328 |
}
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329 |
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330 |
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331 |
FT_CALLBACK_DEF( FT_Error )
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332 |
TT_Load_Simple_Glyph( TT_Loader load )
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|
333 |
{
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334 |
FT_Error error;
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335 |
FT_Byte* p = load->cursor;
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336 |
FT_Byte* limit = load->limit;
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337 |
FT_GlyphLoader gloader = load->gloader;
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338 |
FT_Int n_contours = load->n_contours;
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339 |
FT_Outline* outline;
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340 |
TT_Face face = (TT_Face)load->face;
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341 |
FT_UShort n_ins;
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342 |
FT_Int n_points;
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343 |
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|
344 |
FT_Byte *flag, *flag_limit;
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345 |
FT_Byte c, count;
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|
346 |
FT_Vector *vec, *vec_limit;
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|
347 |
FT_Pos x;
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|
348 |
FT_Short *cont, *cont_limit, prev_cont;
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349 |
FT_Int xy_size = 0;
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350 |
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351 |
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352 |
/* check that we can add the contours to the glyph */
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353 |
error = FT_GLYPHLOADER_CHECK_POINTS( gloader, 0, n_contours );
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354 |
if ( error )
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355 |
goto Fail;
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356 |
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|
357 |
/* reading the contours' endpoints & number of points */
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|
358 |
cont = gloader->current.outline.contours;
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|
359 |
cont_limit = cont + n_contours;
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360 |
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361 |
/* check space for contours array + instructions count */
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362 |
if ( n_contours >= 0xFFF || p + ( n_contours + 1 ) * 2 > limit )
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|
363 |
goto Invalid_Outline;
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364 |
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365 |
prev_cont = FT_NEXT_USHORT( p );
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366 |
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367 |
if ( n_contours > 0 )
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|
368 |
cont[0] = prev_cont;
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369 |
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370 |
for ( cont++; cont < cont_limit; cont++ )
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|
371 |
{
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|
372 |
cont[0] = FT_NEXT_USHORT( p );
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|
373 |
if ( cont[0] <= prev_cont )
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|
|
374 |
{
|
|
|
375 |
/* unordered contours: this is invalid */
|
|
|
376 |
error = TT_Err_Invalid_Table;
|
|
|
377 |
goto Fail;
|
|
|
378 |
}
|
|
|
379 |
prev_cont = cont[0];
|
|
|
380 |
}
|
|
|
381 |
|
|
|
382 |
n_points = 0;
|
|
|
383 |
if ( n_contours > 0 )
|
|
|
384 |
{
|
|
|
385 |
n_points = cont[-1] + 1;
|
|
|
386 |
if ( n_points < 0 )
|
|
|
387 |
goto Invalid_Outline;
|
|
|
388 |
}
|
|
|
389 |
|
|
|
390 |
/* note that we will add four phantom points later */
|
|
|
391 |
error = FT_GLYPHLOADER_CHECK_POINTS( gloader, n_points + 4, 0 );
|
|
|
392 |
if ( error )
|
|
|
393 |
goto Fail;
|
|
|
394 |
|
|
|
395 |
/* we'd better check the contours table right now */
|
|
|
396 |
outline = &gloader->current.outline;
|
|
|
397 |
|
|
|
398 |
for ( cont = outline->contours + 1; cont < cont_limit; cont++ )
|
|
|
399 |
if ( cont[-1] >= cont[0] )
|
|
|
400 |
goto Invalid_Outline;
|
|
|
401 |
|
|
|
402 |
/* reading the bytecode instructions */
|
|
|
403 |
load->glyph->control_len = 0;
|
|
|
404 |
load->glyph->control_data = 0;
|
|
|
405 |
|
|
|
406 |
if ( p + 2 > limit )
|
|
|
407 |
goto Invalid_Outline;
|
|
|
408 |
|
|
|
409 |
n_ins = FT_NEXT_USHORT( p );
|
|
|
410 |
|
|
|
411 |
FT_TRACE5(( " Instructions size: %u\n", n_ins ));
|
|
|
412 |
|
|
|
413 |
if ( n_ins > face->max_profile.maxSizeOfInstructions )
|
|
|
414 |
{
|
|
|
415 |
FT_TRACE0(( "TT_Load_Simple_Glyph: too many instructions (%d)\n",
|
|
|
416 |
n_ins ));
|
|
|
417 |
error = TT_Err_Too_Many_Hints;
|
|
|
418 |
goto Fail;
|
|
|
419 |
}
|
|
|
420 |
|
|
|
421 |
if ( ( limit - p ) < n_ins )
|
|
|
422 |
{
|
|
|
423 |
FT_TRACE0(( "TT_Load_Simple_Glyph: instruction count mismatch\n" ));
|
|
|
424 |
error = TT_Err_Too_Many_Hints;
|
|
|
425 |
goto Fail;
|
|
|
426 |
}
|
|
|
427 |
|
|
|
428 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
429 |
|
|
|
430 |
if ( IS_HINTED( load->load_flags ) )
|
|
|
431 |
{
|
|
|
432 |
load->glyph->control_len = n_ins;
|
|
|
433 |
load->glyph->control_data = load->exec->glyphIns;
|
|
|
434 |
|
|
|
435 |
FT_MEM_COPY( load->exec->glyphIns, p, (FT_Long)n_ins );
|
|
|
436 |
}
|
|
|
437 |
|
|
|
438 |
#endif /* TT_USE_BYTECODE_INTERPRETER */
|
|
|
439 |
|
|
|
440 |
p += n_ins;
|
|
|
441 |
|
|
|
442 |
/* reading the point tags */
|
|
|
443 |
flag = (FT_Byte*)outline->tags;
|
|
|
444 |
flag_limit = flag + n_points;
|
|
|
445 |
|
|
|
446 |
FT_ASSERT( flag != NULL );
|
|
|
447 |
|
|
|
448 |
while ( flag < flag_limit )
|
|
|
449 |
{
|
|
|
450 |
if ( p + 1 > limit )
|
|
|
451 |
goto Invalid_Outline;
|
|
|
452 |
|
|
|
453 |
*flag++ = c = FT_NEXT_BYTE( p );
|
|
|
454 |
if ( c & 8 )
|
|
|
455 |
{
|
|
|
456 |
if ( p + 1 > limit )
|
|
|
457 |
goto Invalid_Outline;
|
|
|
458 |
|
|
|
459 |
count = FT_NEXT_BYTE( p );
|
|
|
460 |
if ( flag + (FT_Int)count > flag_limit )
|
|
|
461 |
goto Invalid_Outline;
|
|
|
462 |
|
|
|
463 |
for ( ; count > 0; count-- )
|
|
|
464 |
*flag++ = c;
|
|
|
465 |
}
|
|
|
466 |
}
|
|
|
467 |
|
|
|
468 |
/* reading the X coordinates */
|
|
|
469 |
|
|
|
470 |
vec = outline->points;
|
|
|
471 |
vec_limit = vec + n_points;
|
|
|
472 |
flag = (FT_Byte*)outline->tags;
|
|
|
473 |
x = 0;
|
|
|
474 |
|
|
|
475 |
if ( p + xy_size > limit )
|
|
|
476 |
goto Invalid_Outline;
|
|
|
477 |
|
|
|
478 |
for ( ; vec < vec_limit; vec++, flag++ )
|
|
|
479 |
{
|
|
|
480 |
FT_Pos y = 0;
|
|
|
481 |
FT_Byte f = *flag;
|
|
|
482 |
|
|
|
483 |
|
|
|
484 |
if ( f & 2 )
|
|
|
485 |
{
|
|
|
486 |
if ( p + 1 > limit )
|
|
|
487 |
goto Invalid_Outline;
|
|
|
488 |
|
|
|
489 |
y = (FT_Pos)FT_NEXT_BYTE( p );
|
|
|
490 |
if ( ( f & 16 ) == 0 )
|
|
|
491 |
y = -y;
|
|
|
492 |
}
|
|
|
493 |
else if ( ( f & 16 ) == 0 )
|
|
|
494 |
{
|
|
|
495 |
if ( p + 2 > limit )
|
|
|
496 |
goto Invalid_Outline;
|
|
|
497 |
|
|
|
498 |
y = (FT_Pos)FT_NEXT_SHORT( p );
|
|
|
499 |
}
|
|
|
500 |
|
|
|
501 |
x += y;
|
|
|
502 |
vec->x = x;
|
|
|
503 |
/* the cast is for stupid compilers */
|
|
|
504 |
*flag = (FT_Byte)( f & ~( 2 | 16 ) );
|
|
|
505 |
}
|
|
|
506 |
|
|
|
507 |
/* reading the Y coordinates */
|
|
|
508 |
|
|
|
509 |
vec = gloader->current.outline.points;
|
|
|
510 |
vec_limit = vec + n_points;
|
|
|
511 |
flag = (FT_Byte*)outline->tags;
|
|
|
512 |
x = 0;
|
|
|
513 |
|
|
|
514 |
for ( ; vec < vec_limit; vec++, flag++ )
|
|
|
515 |
{
|
|
|
516 |
FT_Pos y = 0;
|
|
|
517 |
FT_Byte f = *flag;
|
|
|
518 |
|
|
|
519 |
|
|
|
520 |
if ( f & 4 )
|
|
|
521 |
{
|
|
|
522 |
if ( p + 1 > limit )
|
|
|
523 |
goto Invalid_Outline;
|
|
|
524 |
|
|
|
525 |
y = (FT_Pos)FT_NEXT_BYTE( p );
|
|
|
526 |
if ( ( f & 32 ) == 0 )
|
|
|
527 |
y = -y;
|
|
|
528 |
}
|
|
|
529 |
else if ( ( f & 32 ) == 0 )
|
|
|
530 |
{
|
|
|
531 |
if ( p + 2 > limit )
|
|
|
532 |
goto Invalid_Outline;
|
|
|
533 |
|
|
|
534 |
y = (FT_Pos)FT_NEXT_SHORT( p );
|
|
|
535 |
}
|
|
|
536 |
|
|
|
537 |
x += y;
|
|
|
538 |
vec->y = x;
|
|
|
539 |
/* the cast is for stupid compilers */
|
|
|
540 |
*flag = (FT_Byte)( f & FT_CURVE_TAG_ON );
|
|
|
541 |
}
|
|
|
542 |
|
|
|
543 |
outline->n_points = (FT_UShort)n_points;
|
|
|
544 |
outline->n_contours = (FT_Short) n_contours;
|
|
|
545 |
|
|
|
546 |
load->cursor = p;
|
|
|
547 |
|
|
|
548 |
Fail:
|
|
|
549 |
return error;
|
|
|
550 |
|
|
|
551 |
Invalid_Outline:
|
|
|
552 |
error = TT_Err_Invalid_Outline;
|
|
|
553 |
goto Fail;
|
|
|
554 |
}
|
|
|
555 |
|
|
|
556 |
|
|
|
557 |
FT_CALLBACK_DEF( FT_Error )
|
|
|
558 |
TT_Load_Composite_Glyph( TT_Loader loader )
|
|
|
559 |
{
|
|
|
560 |
FT_Error error;
|
|
|
561 |
FT_Byte* p = loader->cursor;
|
|
|
562 |
FT_Byte* limit = loader->limit;
|
|
|
563 |
FT_GlyphLoader gloader = loader->gloader;
|
|
|
564 |
FT_SubGlyph subglyph;
|
|
|
565 |
FT_UInt num_subglyphs;
|
|
|
566 |
|
|
|
567 |
|
|
|
568 |
num_subglyphs = 0;
|
|
|
569 |
|
|
|
570 |
do
|
|
|
571 |
{
|
|
|
572 |
FT_Fixed xx, xy, yy, yx;
|
|
|
573 |
FT_UInt count;
|
|
|
574 |
|
|
|
575 |
|
|
|
576 |
/* check that we can load a new subglyph */
|
|
|
577 |
error = FT_GlyphLoader_CheckSubGlyphs( gloader, num_subglyphs + 1 );
|
|
|
578 |
if ( error )
|
|
|
579 |
goto Fail;
|
|
|
580 |
|
|
|
581 |
/* check space */
|
|
|
582 |
if ( p + 4 > limit )
|
|
|
583 |
goto Invalid_Composite;
|
|
|
584 |
|
|
|
585 |
subglyph = gloader->current.subglyphs + num_subglyphs;
|
|
|
586 |
|
|
|
587 |
subglyph->arg1 = subglyph->arg2 = 0;
|
|
|
588 |
|
|
|
589 |
subglyph->flags = FT_NEXT_USHORT( p );
|
|
|
590 |
subglyph->index = FT_NEXT_USHORT( p );
|
|
|
591 |
|
|
|
592 |
/* check space */
|
|
|
593 |
count = 2;
|
|
|
594 |
if ( subglyph->flags & ARGS_ARE_WORDS )
|
|
|
595 |
count += 2;
|
|
|
596 |
if ( subglyph->flags & WE_HAVE_A_SCALE )
|
|
|
597 |
count += 2;
|
|
|
598 |
else if ( subglyph->flags & WE_HAVE_AN_XY_SCALE )
|
|
|
599 |
count += 4;
|
|
|
600 |
else if ( subglyph->flags & WE_HAVE_A_2X2 )
|
|
|
601 |
count += 8;
|
|
|
602 |
|
|
|
603 |
if ( p + count > limit )
|
|
|
604 |
goto Invalid_Composite;
|
|
|
605 |
|
|
|
606 |
/* read arguments */
|
|
|
607 |
if ( subglyph->flags & ARGS_ARE_WORDS )
|
|
|
608 |
{
|
|
|
609 |
subglyph->arg1 = FT_NEXT_SHORT( p );
|
|
|
610 |
subglyph->arg2 = FT_NEXT_SHORT( p );
|
|
|
611 |
}
|
|
|
612 |
else
|
|
|
613 |
{
|
|
|
614 |
subglyph->arg1 = FT_NEXT_CHAR( p );
|
|
|
615 |
subglyph->arg2 = FT_NEXT_CHAR( p );
|
|
|
616 |
}
|
|
|
617 |
|
|
|
618 |
/* read transform */
|
|
|
619 |
xx = yy = 0x10000L;
|
|
|
620 |
xy = yx = 0;
|
|
|
621 |
|
|
|
622 |
if ( subglyph->flags & WE_HAVE_A_SCALE )
|
|
|
623 |
{
|
|
|
624 |
xx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
|
|
|
625 |
yy = xx;
|
|
|
626 |
}
|
|
|
627 |
else if ( subglyph->flags & WE_HAVE_AN_XY_SCALE )
|
|
|
628 |
{
|
|
|
629 |
xx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
|
|
|
630 |
yy = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
|
|
|
631 |
}
|
|
|
632 |
else if ( subglyph->flags & WE_HAVE_A_2X2 )
|
|
|
633 |
{
|
|
|
634 |
xx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
|
|
|
635 |
yx = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
|
|
|
636 |
xy = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
|
|
|
637 |
yy = (FT_Fixed)FT_NEXT_SHORT( p ) << 2;
|
|
|
638 |
}
|
|
|
639 |
|
|
|
640 |
subglyph->transform.xx = xx;
|
|
|
641 |
subglyph->transform.xy = xy;
|
|
|
642 |
subglyph->transform.yx = yx;
|
|
|
643 |
subglyph->transform.yy = yy;
|
|
|
644 |
|
|
|
645 |
num_subglyphs++;
|
|
|
646 |
|
|
|
647 |
} while ( subglyph->flags & MORE_COMPONENTS );
|
|
|
648 |
|
|
|
649 |
gloader->current.num_subglyphs = num_subglyphs;
|
|
|
650 |
|
|
|
651 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
652 |
|
|
|
653 |
{
|
|
|
654 |
FT_Stream stream = loader->stream;
|
|
|
655 |
|
|
|
656 |
|
|
|
657 |
/* we must undo the FT_FRAME_ENTER in order to point */
|
|
|
658 |
/* to the composite instructions, if we find some. */
|
|
|
659 |
/* We will process them later. */
|
|
|
660 |
/* */
|
|
|
661 |
loader->ins_pos = (FT_ULong)( FT_STREAM_POS() +
|
|
|
662 |
p - limit );
|
|
|
663 |
}
|
|
|
664 |
|
|
|
665 |
#endif
|
|
|
666 |
|
|
|
667 |
loader->cursor = p;
|
|
|
668 |
|
|
|
669 |
Fail:
|
|
|
670 |
return error;
|
|
|
671 |
|
|
|
672 |
Invalid_Composite:
|
|
|
673 |
error = TT_Err_Invalid_Composite;
|
|
|
674 |
goto Fail;
|
|
|
675 |
}
|
|
|
676 |
|
|
|
677 |
|
|
|
678 |
FT_LOCAL_DEF( void )
|
|
|
679 |
TT_Init_Glyph_Loading( TT_Face face )
|
|
|
680 |
{
|
|
|
681 |
face->access_glyph_frame = TT_Access_Glyph_Frame;
|
|
|
682 |
face->read_glyph_header = TT_Load_Glyph_Header;
|
|
|
683 |
face->read_simple_glyph = TT_Load_Simple_Glyph;
|
|
|
684 |
face->read_composite_glyph = TT_Load_Composite_Glyph;
|
|
|
685 |
face->forget_glyph_frame = TT_Forget_Glyph_Frame;
|
|
|
686 |
}
|
|
|
687 |
|
|
|
688 |
|
|
|
689 |
static void
|
|
|
690 |
tt_prepare_zone( TT_GlyphZone zone,
|
|
|
691 |
FT_GlyphLoad load,
|
|
|
692 |
FT_UInt start_point,
|
|
|
693 |
FT_UInt start_contour )
|
|
|
694 |
{
|
|
|
695 |
zone->n_points = (FT_UShort)( load->outline.n_points - start_point );
|
|
|
696 |
zone->n_contours = (FT_Short) ( load->outline.n_contours -
|
|
|
697 |
start_contour );
|
|
|
698 |
zone->org = load->extra_points + start_point;
|
|
|
699 |
zone->cur = load->outline.points + start_point;
|
|
|
700 |
zone->orus = load->extra_points2 + start_point;
|
|
|
701 |
zone->tags = (FT_Byte*)load->outline.tags + start_point;
|
|
|
702 |
zone->contours = (FT_UShort*)load->outline.contours + start_contour;
|
|
|
703 |
zone->first_point = (FT_UShort)start_point;
|
|
|
704 |
}
|
|
|
705 |
|
|
|
706 |
|
|
|
707 |
/*************************************************************************/
|
|
|
708 |
/* */
|
|
|
709 |
/* <Function> */
|
|
|
710 |
/* TT_Hint_Glyph */
|
|
|
711 |
/* */
|
|
|
712 |
/* <Description> */
|
|
|
713 |
/* Hint the glyph using the zone prepared by the caller. Note that */
|
|
|
714 |
/* the zone is supposed to include four phantom points. */
|
|
|
715 |
/* */
|
|
|
716 |
static FT_Error
|
|
|
717 |
TT_Hint_Glyph( TT_Loader loader,
|
|
|
718 |
FT_Bool is_composite )
|
|
|
719 |
{
|
|
|
720 |
TT_GlyphZone zone = &loader->zone;
|
|
|
721 |
FT_Pos origin;
|
|
|
722 |
|
|
|
723 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
724 |
FT_UInt n_ins;
|
|
|
725 |
#else
|
|
|
726 |
FT_UNUSED( is_composite );
|
|
|
727 |
#endif
|
|
|
728 |
|
|
|
729 |
|
|
|
730 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
731 |
if ( loader->glyph->control_len > 0xFFFFL )
|
|
|
732 |
{
|
|
|
733 |
FT_TRACE1(( "TT_Hint_Glyph: too long instructions " ));
|
|
|
734 |
FT_TRACE1(( "(0x%lx byte) is truncated\n",
|
|
|
735 |
loader->glyph->control_len ));
|
|
|
736 |
}
|
|
|
737 |
n_ins = (FT_UInt)( loader->glyph->control_len );
|
|
|
738 |
#endif
|
|
|
739 |
|
|
|
740 |
origin = zone->cur[zone->n_points - 4].x;
|
|
|
741 |
origin = FT_PIX_ROUND( origin ) - origin;
|
|
|
742 |
if ( origin )
|
|
|
743 |
translate_array( zone->n_points, zone->cur, origin, 0 );
|
|
|
744 |
|
|
|
745 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
746 |
/* save original point position in org */
|
|
|
747 |
if ( n_ins > 0 )
|
|
|
748 |
FT_ARRAY_COPY( zone->org, zone->cur, zone->n_points );
|
|
|
749 |
|
|
|
750 |
/* Reset graphics state. */
|
|
|
751 |
loader->exec->GS = ((TT_Size)loader->size)->GS;
|
|
|
752 |
|
|
|
753 |
/* XXX: UNDOCUMENTED! Hinting instructions of a composite glyph */
|
|
|
754 |
/* completely refer to the (already) hinted subglyphs. */
|
|
|
755 |
if ( is_composite )
|
|
|
756 |
{
|
|
|
757 |
loader->exec->metrics.x_scale = 1 << 16;
|
|
|
758 |
loader->exec->metrics.y_scale = 1 << 16;
|
|
|
759 |
|
|
|
760 |
FT_ARRAY_COPY( zone->orus, zone->cur, zone->n_points );
|
|
|
761 |
}
|
|
|
762 |
else
|
|
|
763 |
{
|
|
|
764 |
loader->exec->metrics.x_scale =
|
|
|
765 |
((TT_Size)loader->size)->metrics.x_scale;
|
|
|
766 |
loader->exec->metrics.y_scale =
|
|
|
767 |
((TT_Size)loader->size)->metrics.y_scale;
|
|
|
768 |
}
|
|
|
769 |
#endif
|
|
|
770 |
|
|
|
771 |
/* round pp2 and pp4 */
|
|
|
772 |
zone->cur[zone->n_points - 3].x =
|
|
|
773 |
FT_PIX_ROUND( zone->cur[zone->n_points - 3].x );
|
|
|
774 |
zone->cur[zone->n_points - 1].y =
|
|
|
775 |
FT_PIX_ROUND( zone->cur[zone->n_points - 1].y );
|
|
|
776 |
|
|
|
777 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
778 |
|
|
|
779 |
if ( n_ins > 0 )
|
|
|
780 |
{
|
|
|
781 |
FT_Bool debug;
|
|
|
782 |
FT_Error error;
|
|
|
783 |
|
|
|
784 |
FT_GlyphLoader gloader = loader->gloader;
|
|
|
785 |
FT_Outline current_outline = gloader->current.outline;
|
|
|
786 |
|
|
|
787 |
|
|
|
788 |
error = TT_Set_CodeRange( loader->exec, tt_coderange_glyph,
|
|
|
789 |
loader->exec->glyphIns, n_ins );
|
|
|
790 |
if ( error )
|
|
|
791 |
return error;
|
|
|
792 |
|
|
|
793 |
loader->exec->is_composite = is_composite;
|
|
|
794 |
loader->exec->pts = *zone;
|
|
|
795 |
|
|
|
796 |
debug = FT_BOOL( !( loader->load_flags & FT_LOAD_NO_SCALE ) &&
|
|
|
797 |
((TT_Size)loader->size)->debug );
|
|
|
798 |
|
|
|
799 |
error = TT_Run_Context( loader->exec, debug );
|
|
|
800 |
if ( error && loader->exec->pedantic_hinting )
|
|
|
801 |
return error;
|
|
|
802 |
|
|
|
803 |
/* store drop-out mode in bits 5-7; set bit 2 also as a marker */
|
|
|
804 |
current_outline.tags[0] |=
|
|
|
805 |
( loader->exec->GS.scan_type << 5 ) | FT_CURVE_TAG_HAS_SCANMODE;
|
|
|
806 |
}
|
|
|
807 |
|
|
|
808 |
#endif
|
|
|
809 |
|
|
|
810 |
/* save glyph phantom points */
|
|
|
811 |
if ( !loader->preserve_pps )
|
|
|
812 |
{
|
|
|
813 |
loader->pp1 = zone->cur[zone->n_points - 4];
|
|
|
814 |
loader->pp2 = zone->cur[zone->n_points - 3];
|
|
|
815 |
loader->pp3 = zone->cur[zone->n_points - 2];
|
|
|
816 |
loader->pp4 = zone->cur[zone->n_points - 1];
|
|
|
817 |
}
|
|
|
818 |
|
|
|
819 |
return TT_Err_Ok;
|
|
|
820 |
}
|
|
|
821 |
|
|
|
822 |
|
|
|
823 |
/*************************************************************************/
|
|
|
824 |
/* */
|
|
|
825 |
/* <Function> */
|
|
|
826 |
/* TT_Process_Simple_Glyph */
|
|
|
827 |
/* */
|
|
|
828 |
/* <Description> */
|
|
|
829 |
/* Once a simple glyph has been loaded, it needs to be processed. */
|
|
|
830 |
/* Usually, this means scaling and hinting through bytecode */
|
|
|
831 |
/* interpretation. */
|
|
|
832 |
/* */
|
|
|
833 |
static FT_Error
|
|
|
834 |
TT_Process_Simple_Glyph( TT_Loader loader )
|
|
|
835 |
{
|
|
|
836 |
FT_GlyphLoader gloader = loader->gloader;
|
|
|
837 |
FT_Error error = TT_Err_Ok;
|
|
|
838 |
FT_Outline* outline;
|
|
|
839 |
FT_Int n_points;
|
|
|
840 |
|
|
|
841 |
|
|
|
842 |
outline = &gloader->current.outline;
|
|
|
843 |
n_points = outline->n_points;
|
|
|
844 |
|
|
|
845 |
/* set phantom points */
|
|
|
846 |
|
|
|
847 |
outline->points[n_points ] = loader->pp1;
|
|
|
848 |
outline->points[n_points + 1] = loader->pp2;
|
|
|
849 |
outline->points[n_points + 2] = loader->pp3;
|
|
|
850 |
outline->points[n_points + 3] = loader->pp4;
|
|
|
851 |
|
|
|
852 |
outline->tags[n_points ] = 0;
|
|
|
853 |
outline->tags[n_points + 1] = 0;
|
|
|
854 |
outline->tags[n_points + 2] = 0;
|
|
|
855 |
outline->tags[n_points + 3] = 0;
|
|
|
856 |
|
|
|
857 |
n_points += 4;
|
|
|
858 |
|
|
|
859 |
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
|
|
|
860 |
|
|
|
861 |
if ( ((TT_Face)loader->face)->doblend )
|
|
|
862 |
{
|
|
|
863 |
/* Deltas apply to the unscaled data. */
|
|
|
864 |
FT_Vector* deltas;
|
|
|
865 |
FT_Memory memory = loader->face->memory;
|
|
|
866 |
FT_Int i;
|
|
|
867 |
|
|
|
868 |
|
|
|
869 |
error = TT_Vary_Get_Glyph_Deltas( (TT_Face)(loader->face),
|
|
|
870 |
loader->glyph_index,
|
|
|
871 |
&deltas,
|
|
|
872 |
n_points );
|
|
|
873 |
if ( error )
|
|
|
874 |
return error;
|
|
|
875 |
|
|
|
876 |
for ( i = 0; i < n_points; ++i )
|
|
|
877 |
{
|
|
|
878 |
outline->points[i].x += deltas[i].x;
|
|
|
879 |
outline->points[i].y += deltas[i].y;
|
|
|
880 |
}
|
|
|
881 |
|
|
|
882 |
FT_FREE( deltas );
|
|
|
883 |
}
|
|
|
884 |
|
|
|
885 |
#endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */
|
|
|
886 |
|
|
|
887 |
if ( IS_HINTED( loader->load_flags ) )
|
|
|
888 |
{
|
|
|
889 |
tt_prepare_zone( &loader->zone, &gloader->current, 0, 0 );
|
|
|
890 |
|
|
|
891 |
FT_ARRAY_COPY( loader->zone.orus, loader->zone.cur,
|
|
|
892 |
loader->zone.n_points + 4 );
|
|
|
893 |
}
|
|
|
894 |
|
|
|
895 |
/* scale the glyph */
|
|
|
896 |
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
|
|
|
897 |
{
|
|
|
898 |
FT_Vector* vec = outline->points;
|
|
|
899 |
FT_Vector* limit = outline->points + n_points;
|
|
|
900 |
FT_Fixed x_scale = ((TT_Size)loader->size)->metrics.x_scale;
|
|
|
901 |
FT_Fixed y_scale = ((TT_Size)loader->size)->metrics.y_scale;
|
|
|
902 |
|
|
|
903 |
|
|
|
904 |
for ( ; vec < limit; vec++ )
|
|
|
905 |
{
|
|
|
906 |
vec->x = FT_MulFix( vec->x, x_scale );
|
|
|
907 |
vec->y = FT_MulFix( vec->y, y_scale );
|
|
|
908 |
}
|
|
|
909 |
|
|
|
910 |
loader->pp1 = outline->points[n_points - 4];
|
|
|
911 |
loader->pp2 = outline->points[n_points - 3];
|
|
|
912 |
loader->pp3 = outline->points[n_points - 2];
|
|
|
913 |
loader->pp4 = outline->points[n_points - 1];
|
|
|
914 |
}
|
|
|
915 |
|
|
|
916 |
if ( IS_HINTED( loader->load_flags ) )
|
|
|
917 |
{
|
|
|
918 |
loader->zone.n_points += 4;
|
|
|
919 |
|
|
|
920 |
error = TT_Hint_Glyph( loader, 0 );
|
|
|
921 |
}
|
|
|
922 |
|
|
|
923 |
return error;
|
|
|
924 |
}
|
|
|
925 |
|
|
|
926 |
|
|
|
927 |
/*************************************************************************/
|
|
|
928 |
/* */
|
|
|
929 |
/* <Function> */
|
|
|
930 |
/* TT_Process_Composite_Component */
|
|
|
931 |
/* */
|
|
|
932 |
/* <Description> */
|
|
|
933 |
/* Once a composite component has been loaded, it needs to be */
|
|
|
934 |
/* processed. Usually, this means transforming and translating. */
|
|
|
935 |
/* */
|
|
|
936 |
static FT_Error
|
|
|
937 |
TT_Process_Composite_Component( TT_Loader loader,
|
|
|
938 |
FT_SubGlyph subglyph,
|
|
|
939 |
FT_UInt start_point,
|
|
|
940 |
FT_UInt num_base_points )
|
|
|
941 |
{
|
|
|
942 |
FT_GlyphLoader gloader = loader->gloader;
|
|
|
943 |
FT_Vector* base_vec = gloader->base.outline.points;
|
|
|
944 |
FT_UInt num_points = gloader->base.outline.n_points;
|
|
|
945 |
FT_Bool have_scale;
|
|
|
946 |
FT_Pos x, y;
|
|
|
947 |
|
|
|
948 |
|
|
|
949 |
have_scale = FT_BOOL( subglyph->flags & ( WE_HAVE_A_SCALE |
|
|
|
950 |
WE_HAVE_AN_XY_SCALE |
|
|
|
951 |
WE_HAVE_A_2X2 ) );
|
|
|
952 |
|
|
|
953 |
/* perform the transform required for this subglyph */
|
|
|
954 |
if ( have_scale )
|
|
|
955 |
{
|
|
|
956 |
FT_UInt i;
|
|
|
957 |
|
|
|
958 |
|
|
|
959 |
for ( i = num_base_points; i < num_points; i++ )
|
|
|
960 |
FT_Vector_Transform( base_vec + i, &subglyph->transform );
|
|
|
961 |
}
|
|
|
962 |
|
|
|
963 |
/* get offset */
|
|
|
964 |
if ( !( subglyph->flags & ARGS_ARE_XY_VALUES ) )
|
|
|
965 |
{
|
|
|
966 |
FT_UInt k = subglyph->arg1;
|
|
|
967 |
FT_UInt l = subglyph->arg2;
|
|
|
968 |
FT_Vector* p1;
|
|
|
969 |
FT_Vector* p2;
|
|
|
970 |
|
|
|
971 |
|
|
|
972 |
/* match l-th point of the newly loaded component to the k-th point */
|
|
|
973 |
/* of the previously loaded components. */
|
|
|
974 |
|
|
|
975 |
/* change to the point numbers used by our outline */
|
|
|
976 |
k += start_point;
|
|
|
977 |
l += num_base_points;
|
|
|
978 |
if ( k >= num_base_points ||
|
|
|
979 |
l >= num_points )
|
|
|
980 |
return TT_Err_Invalid_Composite;
|
|
|
981 |
|
|
|
982 |
p1 = gloader->base.outline.points + k;
|
|
|
983 |
p2 = gloader->base.outline.points + l;
|
|
|
984 |
|
|
|
985 |
x = p1->x - p2->x;
|
|
|
986 |
y = p1->y - p2->y;
|
|
|
987 |
}
|
|
|
988 |
else
|
|
|
989 |
{
|
|
|
990 |
x = subglyph->arg1;
|
|
|
991 |
y = subglyph->arg2;
|
|
|
992 |
|
|
|
993 |
if ( !x && !y )
|
|
|
994 |
return TT_Err_Ok;
|
|
|
995 |
|
|
|
996 |
/* Use a default value dependent on */
|
|
|
997 |
/* TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED. This is useful for old TT */
|
|
|
998 |
/* fonts which don't set the xxx_COMPONENT_OFFSET bit. */
|
|
|
999 |
|
|
|
1000 |
if ( have_scale &&
|
|
|
1001 |
#ifdef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED
|
|
|
1002 |
!( subglyph->flags & UNSCALED_COMPONENT_OFFSET ) )
|
|
|
1003 |
#else
|
|
|
1004 |
( subglyph->flags & SCALED_COMPONENT_OFFSET ) )
|
|
|
1005 |
#endif
|
|
|
1006 |
{
|
|
|
1007 |
|
|
|
1008 |
#if 0
|
|
|
1009 |
|
|
|
1010 |
/*************************************************************************/
|
|
|
1011 |
/* */
|
|
|
1012 |
/* This algorithm is what Apple documents. But it doesn't work. */
|
|
|
1013 |
/* */
|
|
|
1014 |
int a = subglyph->transform.xx > 0 ? subglyph->transform.xx
|
|
|
1015 |
: -subglyph->transform.xx;
|
|
|
1016 |
int b = subglyph->transform.yx > 0 ? subglyph->transform.yx
|
|
|
1017 |
: -subglyph->transform.yx;
|
|
|
1018 |
int c = subglyph->transform.xy > 0 ? subglyph->transform.xy
|
|
|
1019 |
: -subglyph->transform.xy;
|
|
|
1020 |
int d = subglyph->transform.yy > 0 ? subglyph->transform.yy
|
|
|
1021 |
: -subglyph->transform.yy;
|
|
|
1022 |
int m = a > b ? a : b;
|
|
|
1023 |
int n = c > d ? c : d;
|
|
|
1024 |
|
|
|
1025 |
|
|
|
1026 |
if ( a - b <= 33 && a - b >= -33 )
|
|
|
1027 |
m *= 2;
|
|
|
1028 |
if ( c - d <= 33 && c - d >= -33 )
|
|
|
1029 |
n *= 2;
|
|
|
1030 |
x = FT_MulFix( x, m );
|
|
|
1031 |
y = FT_MulFix( y, n );
|
|
|
1032 |
|
|
|
1033 |
#else /* 0 */
|
|
|
1034 |
|
|
|
1035 |
/*************************************************************************/
|
|
|
1036 |
/* */
|
|
|
1037 |
/* This algorithm is a guess and works much better than the above. */
|
|
|
1038 |
/* */
|
|
|
1039 |
FT_Fixed mac_xscale = FT_SqrtFixed(
|
|
|
1040 |
(FT_Int32)FT_MulFix( subglyph->transform.xx,
|
|
|
1041 |
subglyph->transform.xx ) +
|
|
|
1042 |
(FT_Int32)FT_MulFix( subglyph->transform.xy,
|
|
|
1043 |
subglyph->transform.xy ) );
|
|
|
1044 |
FT_Fixed mac_yscale = FT_SqrtFixed(
|
|
|
1045 |
(FT_Int32)FT_MulFix( subglyph->transform.yy,
|
|
|
1046 |
subglyph->transform.yy ) +
|
|
|
1047 |
(FT_Int32)FT_MulFix( subglyph->transform.yx,
|
|
|
1048 |
subglyph->transform.yx ) );
|
|
|
1049 |
|
|
|
1050 |
|
|
|
1051 |
x = FT_MulFix( x, mac_xscale );
|
|
|
1052 |
y = FT_MulFix( y, mac_yscale );
|
|
|
1053 |
|
|
|
1054 |
#endif /* 0 */
|
|
|
1055 |
|
|
|
1056 |
}
|
|
|
1057 |
|
|
|
1058 |
if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) )
|
|
|
1059 |
{
|
|
|
1060 |
FT_Fixed x_scale = ((TT_Size)loader->size)->metrics.x_scale;
|
|
|
1061 |
FT_Fixed y_scale = ((TT_Size)loader->size)->metrics.y_scale;
|
|
|
1062 |
|
|
|
1063 |
|
|
|
1064 |
x = FT_MulFix( x, x_scale );
|
|
|
1065 |
y = FT_MulFix( y, y_scale );
|
|
|
1066 |
|
|
|
1067 |
if ( subglyph->flags & ROUND_XY_TO_GRID )
|
|
|
1068 |
{
|
|
|
1069 |
x = FT_PIX_ROUND( x );
|
|
|
1070 |
y = FT_PIX_ROUND( y );
|
|
|
1071 |
}
|
|
|
1072 |
}
|
|
|
1073 |
}
|
|
|
1074 |
|
|
|
1075 |
if ( x || y )
|
|
|
1076 |
translate_array( num_points - num_base_points,
|
|
|
1077 |
base_vec + num_base_points,
|
|
|
1078 |
x, y );
|
|
|
1079 |
|
|
|
1080 |
return TT_Err_Ok;
|
|
|
1081 |
}
|
|
|
1082 |
|
|
|
1083 |
|
|
|
1084 |
/*************************************************************************/
|
|
|
1085 |
/* */
|
|
|
1086 |
/* <Function> */
|
|
|
1087 |
/* TT_Process_Composite_Glyph */
|
|
|
1088 |
/* */
|
|
|
1089 |
/* <Description> */
|
|
|
1090 |
/* This is slightly different from TT_Process_Simple_Glyph, in that */
|
|
|
1091 |
/* its sole purpose is to hint the glyph. Thus this function is */
|
|
|
1092 |
/* only available when bytecode interpreter is enabled. */
|
|
|
1093 |
/* */
|
|
|
1094 |
static FT_Error
|
|
|
1095 |
TT_Process_Composite_Glyph( TT_Loader loader,
|
|
|
1096 |
FT_UInt start_point,
|
|
|
1097 |
FT_UInt start_contour )
|
|
|
1098 |
{
|
|
|
1099 |
FT_Error error;
|
|
|
1100 |
FT_Outline* outline;
|
|
|
1101 |
FT_UInt i;
|
|
|
1102 |
|
|
|
1103 |
|
|
|
1104 |
outline = &loader->gloader->base.outline;
|
|
|
1105 |
|
|
|
1106 |
/* make room for phantom points */
|
|
|
1107 |
error = FT_GLYPHLOADER_CHECK_POINTS( loader->gloader,
|
|
|
1108 |
outline->n_points + 4,
|
|
|
1109 |
0 );
|
|
|
1110 |
if ( error )
|
|
|
1111 |
return error;
|
|
|
1112 |
|
|
|
1113 |
outline->points[outline->n_points ] = loader->pp1;
|
|
|
1114 |
outline->points[outline->n_points + 1] = loader->pp2;
|
|
|
1115 |
outline->points[outline->n_points + 2] = loader->pp3;
|
|
|
1116 |
outline->points[outline->n_points + 3] = loader->pp4;
|
|
|
1117 |
|
|
|
1118 |
outline->tags[outline->n_points ] = 0;
|
|
|
1119 |
outline->tags[outline->n_points + 1] = 0;
|
|
|
1120 |
outline->tags[outline->n_points + 2] = 0;
|
|
|
1121 |
outline->tags[outline->n_points + 3] = 0;
|
|
|
1122 |
|
|
|
1123 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
1124 |
|
|
|
1125 |
{
|
|
|
1126 |
FT_Stream stream = loader->stream;
|
|
|
1127 |
FT_UShort n_ins, max_ins;
|
|
|
1128 |
FT_ULong tmp;
|
|
|
1129 |
|
|
|
1130 |
|
|
|
1131 |
/* TT_Load_Composite_Glyph only gives us the offset of instructions */
|
|
|
1132 |
/* so we read them here */
|
|
|
1133 |
if ( FT_STREAM_SEEK( loader->ins_pos ) ||
|
|
|
1134 |
FT_READ_USHORT( n_ins ) )
|
|
|
1135 |
return error;
|
|
|
1136 |
|
|
|
1137 |
FT_TRACE5(( " Instructions size = %d\n", n_ins ));
|
|
|
1138 |
|
|
|
1139 |
/* check it */
|
|
|
1140 |
max_ins = ((TT_Face)loader->face)->max_profile.maxSizeOfInstructions;
|
|
|
1141 |
if ( n_ins > max_ins )
|
|
|
1142 |
{
|
|
|
1143 |
/* acroread ignores this field, so we only do a rough safety check */
|
|
|
1144 |
if ( (FT_Int)n_ins > loader->byte_len )
|
|
|
1145 |
{
|
|
|
1146 |
FT_TRACE1(( "TT_Process_Composite_Glyph: "
|
|
|
1147 |
"too many instructions (%d) for glyph with length %d\n",
|
|
|
1148 |
n_ins, loader->byte_len ));
|
|
|
1149 |
return TT_Err_Too_Many_Hints;
|
|
|
1150 |
}
|
|
|
1151 |
|
|
|
1152 |
tmp = loader->exec->glyphSize;
|
|
|
1153 |
error = Update_Max( loader->exec->memory,
|
|
|
1154 |
&tmp,
|
|
|
1155 |
sizeof ( FT_Byte ),
|
|
|
1156 |
(void*)&loader->exec->glyphIns,
|
|
|
1157 |
n_ins );
|
|
|
1158 |
loader->exec->glyphSize = (FT_UShort)tmp;
|
|
|
1159 |
if ( error )
|
|
|
1160 |
return error;
|
|
|
1161 |
}
|
|
|
1162 |
else if ( n_ins == 0 )
|
|
|
1163 |
return TT_Err_Ok;
|
|
|
1164 |
|
|
|
1165 |
if ( FT_STREAM_READ( loader->exec->glyphIns, n_ins ) )
|
|
|
1166 |
return error;
|
|
|
1167 |
|
|
|
1168 |
loader->glyph->control_data = loader->exec->glyphIns;
|
|
|
1169 |
loader->glyph->control_len = n_ins;
|
|
|
1170 |
}
|
|
|
1171 |
|
|
|
1172 |
#endif
|
|
|
1173 |
|
|
|
1174 |
tt_prepare_zone( &loader->zone, &loader->gloader->base,
|
|
|
1175 |
start_point, start_contour );
|
|
|
1176 |
|
|
|
1177 |
/* Some points are likely touched during execution of */
|
|
|
1178 |
/* instructions on components. So let's untouch them. */
|
|
|
1179 |
for ( i = start_point; i < loader->zone.n_points; i++ )
|
|
|
1180 |
loader->zone.tags[i] &= ~FT_CURVE_TAG_TOUCH_BOTH;
|
|
|
1181 |
|
|
|
1182 |
loader->zone.n_points += 4;
|
|
|
1183 |
|
|
|
1184 |
return TT_Hint_Glyph( loader, 1 );
|
|
|
1185 |
}
|
|
|
1186 |
|
|
|
1187 |
|
|
|
1188 |
/* Calculate the four phantom points. */
|
|
|
1189 |
/* The first two stand for horizontal origin and advance. */
|
|
|
1190 |
/* The last two stand for vertical origin and advance. */
|
|
|
1191 |
#define TT_LOADER_SET_PP( loader ) \
|
|
|
1192 |
do { \
|
|
|
1193 |
(loader)->pp1.x = (loader)->bbox.xMin - (loader)->left_bearing; \
|
|
|
1194 |
(loader)->pp1.y = 0; \
|
|
|
1195 |
(loader)->pp2.x = (loader)->pp1.x + (loader)->advance; \
|
|
|
1196 |
(loader)->pp2.y = 0; \
|
|
|
1197 |
(loader)->pp3.x = 0; \
|
|
|
1198 |
(loader)->pp3.y = (loader)->top_bearing + (loader)->bbox.yMax; \
|
|
|
1199 |
(loader)->pp4.x = 0; \
|
|
|
1200 |
(loader)->pp4.y = (loader)->pp3.y - (loader)->vadvance; \
|
|
|
1201 |
} while ( 0 )
|
|
|
1202 |
|
|
|
1203 |
|
|
|
1204 |
/*************************************************************************/
|
|
|
1205 |
/* */
|
|
|
1206 |
/* <Function> */
|
|
|
1207 |
/* load_truetype_glyph */
|
|
|
1208 |
/* */
|
|
|
1209 |
/* <Description> */
|
|
|
1210 |
/* Loads a given truetype glyph. Handles composites and uses a */
|
|
|
1211 |
/* TT_Loader object. */
|
|
|
1212 |
/* */
|
|
|
1213 |
static FT_Error
|
|
|
1214 |
load_truetype_glyph( TT_Loader loader,
|
|
|
1215 |
FT_UInt glyph_index,
|
|
|
1216 |
FT_UInt recurse_count,
|
|
|
1217 |
FT_Bool header_only )
|
|
|
1218 |
{
|
|
|
1219 |
FT_Error error = TT_Err_Ok;
|
|
|
1220 |
FT_Fixed x_scale, y_scale;
|
|
|
1221 |
FT_ULong offset;
|
|
|
1222 |
TT_Face face = (TT_Face)loader->face;
|
|
|
1223 |
FT_GlyphLoader gloader = loader->gloader;
|
|
|
1224 |
FT_Bool opened_frame = 0;
|
|
|
1225 |
|
|
|
1226 |
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
|
|
|
1227 |
FT_Vector* deltas = NULL;
|
|
|
1228 |
#endif
|
|
|
1229 |
|
|
|
1230 |
#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
|
|
1231 |
FT_StreamRec inc_stream;
|
|
|
1232 |
FT_Data glyph_data;
|
|
|
1233 |
FT_Bool glyph_data_loaded = 0;
|
|
|
1234 |
#endif
|
|
|
1235 |
|
|
|
1236 |
|
|
|
1237 |
/* some fonts have an incorrect value of `maxComponentDepth', */
|
|
|
1238 |
/* thus we allow depth 1 to catch the majority of them */
|
|
|
1239 |
if ( recurse_count > 1 &&
|
|
|
1240 |
recurse_count > face->max_profile.maxComponentDepth )
|
|
|
1241 |
{
|
|
|
1242 |
error = TT_Err_Invalid_Composite;
|
|
|
1243 |
goto Exit;
|
|
|
1244 |
}
|
|
|
1245 |
|
|
|
1246 |
/* check glyph index */
|
|
|
1247 |
if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
|
|
|
1248 |
{
|
|
|
1249 |
error = TT_Err_Invalid_Glyph_Index;
|
|
|
1250 |
goto Exit;
|
|
|
1251 |
}
|
|
|
1252 |
|
|
|
1253 |
loader->glyph_index = glyph_index;
|
|
|
1254 |
|
|
|
1255 |
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
|
|
|
1256 |
{
|
|
|
1257 |
x_scale = ((TT_Size)loader->size)->metrics.x_scale;
|
|
|
1258 |
y_scale = ((TT_Size)loader->size)->metrics.y_scale;
|
|
|
1259 |
}
|
|
|
1260 |
else
|
|
|
1261 |
{
|
|
|
1262 |
x_scale = 0x10000L;
|
|
|
1263 |
y_scale = 0x10000L;
|
|
|
1264 |
}
|
|
|
1265 |
|
|
|
1266 |
tt_get_metrics( loader, glyph_index );
|
|
|
1267 |
|
|
|
1268 |
/* Set `offset' to the start of the glyph relative to the start of */
|
|
|
1269 |
/* the `glyf' table, and `byte_len' to the length of the glyph in */
|
|
|
1270 |
/* bytes. */
|
|
|
1271 |
|
|
|
1272 |
#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
|
|
1273 |
|
|
|
1274 |
/* If we are loading glyph data via the incremental interface, set */
|
|
|
1275 |
/* the loader stream to a memory stream reading the data returned */
|
|
|
1276 |
/* by the interface. */
|
|
|
1277 |
if ( face->root.internal->incremental_interface )
|
|
|
1278 |
{
|
|
|
1279 |
error = face->root.internal->incremental_interface->funcs->get_glyph_data(
|
|
|
1280 |
face->root.internal->incremental_interface->object,
|
|
|
1281 |
glyph_index, &glyph_data );
|
|
|
1282 |
if ( error )
|
|
|
1283 |
goto Exit;
|
|
|
1284 |
|
|
|
1285 |
glyph_data_loaded = 1;
|
|
|
1286 |
offset = 0;
|
|
|
1287 |
loader->byte_len = glyph_data.length;
|
|
|
1288 |
|
|
|
1289 |
FT_MEM_ZERO( &inc_stream, sizeof ( inc_stream ) );
|
|
|
1290 |
FT_Stream_OpenMemory( &inc_stream,
|
|
|
1291 |
glyph_data.pointer, glyph_data.length );
|
|
|
1292 |
|
|
|
1293 |
loader->stream = &inc_stream;
|
|
|
1294 |
}
|
|
|
1295 |
else
|
|
|
1296 |
|
|
|
1297 |
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
|
|
|
1298 |
|
|
|
1299 |
offset = tt_face_get_location( face, glyph_index,
|
|
|
1300 |
(FT_UInt*)&loader->byte_len );
|
|
|
1301 |
|
|
|
1302 |
if ( loader->byte_len > 0 )
|
|
|
1303 |
{
|
|
|
1304 |
#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
|
|
1305 |
/* for the incremental interface, `glyf_offset' is always zero */
|
|
|
1306 |
if ( !loader->glyf_offset &&
|
|
|
1307 |
!face->root.internal->incremental_interface )
|
|
|
1308 |
#else
|
|
|
1309 |
if ( !loader->glyf_offset )
|
|
|
1310 |
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
|
|
|
1311 |
{
|
|
|
1312 |
FT_TRACE2(( "no `glyf' table but non-zero `loca' entry\n" ));
|
|
|
1313 |
error = TT_Err_Invalid_Table;
|
|
|
1314 |
goto Exit;
|
|
|
1315 |
}
|
|
|
1316 |
|
|
|
1317 |
error = face->access_glyph_frame( loader, glyph_index,
|
|
|
1318 |
loader->glyf_offset + offset,
|
|
|
1319 |
loader->byte_len );
|
|
|
1320 |
if ( error )
|
|
|
1321 |
goto Exit;
|
|
|
1322 |
|
|
|
1323 |
opened_frame = 1;
|
|
|
1324 |
|
|
|
1325 |
/* read glyph header first */
|
|
|
1326 |
error = face->read_glyph_header( loader );
|
|
|
1327 |
if ( error || header_only )
|
|
|
1328 |
goto Exit;
|
|
|
1329 |
}
|
|
|
1330 |
|
|
|
1331 |
if ( loader->byte_len == 0 || loader->n_contours == 0 )
|
|
|
1332 |
{
|
|
|
1333 |
loader->bbox.xMin = 0;
|
|
|
1334 |
loader->bbox.xMax = 0;
|
|
|
1335 |
loader->bbox.yMin = 0;
|
|
|
1336 |
loader->bbox.yMax = 0;
|
|
|
1337 |
|
|
|
1338 |
if ( header_only )
|
|
|
1339 |
goto Exit;
|
|
|
1340 |
|
|
|
1341 |
/* must initialize points before (possibly) overriding */
|
|
|
1342 |
/* glyph metrics from the incremental interface */
|
|
|
1343 |
TT_LOADER_SET_PP( loader );
|
|
|
1344 |
|
|
|
1345 |
#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
|
|
1346 |
tt_get_metrics_incr_overrides( loader, glyph_index );
|
|
|
1347 |
#endif
|
|
|
1348 |
|
|
|
1349 |
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
|
|
|
1350 |
|
|
|
1351 |
if ( ((TT_Face)(loader->face))->doblend )
|
|
|
1352 |
{
|
|
|
1353 |
/* this must be done before scaling */
|
|
|
1354 |
FT_Memory memory = loader->face->memory;
|
|
|
1355 |
|
|
|
1356 |
|
|
|
1357 |
error = TT_Vary_Get_Glyph_Deltas( (TT_Face)(loader->face),
|
|
|
1358 |
glyph_index, &deltas, 4 );
|
|
|
1359 |
if ( error )
|
|
|
1360 |
goto Exit;
|
|
|
1361 |
|
|
|
1362 |
loader->pp1.x += deltas[0].x; loader->pp1.y += deltas[0].y;
|
|
|
1363 |
loader->pp2.x += deltas[1].x; loader->pp2.y += deltas[1].y;
|
|
|
1364 |
loader->pp3.x += deltas[2].x; loader->pp3.y += deltas[2].y;
|
|
|
1365 |
loader->pp4.x += deltas[3].x; loader->pp4.y += deltas[3].y;
|
|
|
1366 |
|
|
|
1367 |
FT_FREE( deltas );
|
|
|
1368 |
}
|
|
|
1369 |
|
|
|
1370 |
#endif
|
|
|
1371 |
|
|
|
1372 |
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
|
|
|
1373 |
{
|
|
|
1374 |
loader->pp1.x = FT_MulFix( loader->pp1.x, x_scale );
|
|
|
1375 |
loader->pp2.x = FT_MulFix( loader->pp2.x, x_scale );
|
|
|
1376 |
loader->pp3.y = FT_MulFix( loader->pp3.y, y_scale );
|
|
|
1377 |
loader->pp4.y = FT_MulFix( loader->pp4.y, y_scale );
|
|
|
1378 |
}
|
|
|
1379 |
|
|
|
1380 |
error = TT_Err_Ok;
|
|
|
1381 |
goto Exit;
|
|
|
1382 |
}
|
|
|
1383 |
|
|
|
1384 |
/* must initialize points before (possibly) overriding */
|
|
|
1385 |
/* glyph metrics from the incremental interface */
|
|
|
1386 |
TT_LOADER_SET_PP( loader );
|
|
|
1387 |
|
|
|
1388 |
#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
|
|
1389 |
tt_get_metrics_incr_overrides( loader, glyph_index );
|
|
|
1390 |
#endif
|
|
|
1391 |
|
|
|
1392 |
/***********************************************************************/
|
|
|
1393 |
/***********************************************************************/
|
|
|
1394 |
/***********************************************************************/
|
|
|
1395 |
|
|
|
1396 |
/* if it is a simple glyph, load it */
|
|
|
1397 |
|
|
|
1398 |
if ( loader->n_contours > 0 )
|
|
|
1399 |
{
|
|
|
1400 |
error = face->read_simple_glyph( loader );
|
|
|
1401 |
if ( error )
|
|
|
1402 |
goto Exit;
|
|
|
1403 |
|
|
|
1404 |
/* all data have been read */
|
|
|
1405 |
face->forget_glyph_frame( loader );
|
|
|
1406 |
opened_frame = 0;
|
|
|
1407 |
|
|
|
1408 |
error = TT_Process_Simple_Glyph( loader );
|
|
|
1409 |
if ( error )
|
|
|
1410 |
goto Exit;
|
|
|
1411 |
|
|
|
1412 |
FT_GlyphLoader_Add( gloader );
|
|
|
1413 |
}
|
|
|
1414 |
|
|
|
1415 |
/***********************************************************************/
|
|
|
1416 |
/***********************************************************************/
|
|
|
1417 |
/***********************************************************************/
|
|
|
1418 |
|
|
|
1419 |
/* otherwise, load a composite! */
|
|
|
1420 |
else if ( loader->n_contours == -1 )
|
|
|
1421 |
{
|
|
|
1422 |
FT_UInt start_point;
|
|
|
1423 |
FT_UInt start_contour;
|
|
|
1424 |
FT_ULong ins_pos; /* position of composite instructions, if any */
|
|
|
1425 |
|
|
|
1426 |
|
|
|
1427 |
start_point = gloader->base.outline.n_points;
|
|
|
1428 |
start_contour = gloader->base.outline.n_contours;
|
|
|
1429 |
|
|
|
1430 |
/* for each subglyph, read composite header */
|
|
|
1431 |
error = face->read_composite_glyph( loader );
|
|
|
1432 |
if ( error )
|
|
|
1433 |
goto Exit;
|
|
|
1434 |
|
|
|
1435 |
/* store the offset of instructions */
|
|
|
1436 |
ins_pos = loader->ins_pos;
|
|
|
1437 |
|
|
|
1438 |
/* all data we need are read */
|
|
|
1439 |
face->forget_glyph_frame( loader );
|
|
|
1440 |
opened_frame = 0;
|
|
|
1441 |
|
|
|
1442 |
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
|
|
|
1443 |
|
|
|
1444 |
if ( face->doblend )
|
|
|
1445 |
{
|
|
|
1446 |
FT_Int i, limit;
|
|
|
1447 |
FT_SubGlyph subglyph;
|
|
|
1448 |
FT_Memory memory = face->root.memory;
|
|
|
1449 |
|
|
|
1450 |
|
|
|
1451 |
/* this provides additional offsets */
|
|
|
1452 |
/* for each component's translation */
|
|
|
1453 |
|
|
|
1454 |
if ( ( error = TT_Vary_Get_Glyph_Deltas(
|
|
|
1455 |
face,
|
|
|
1456 |
glyph_index,
|
|
|
1457 |
&deltas,
|
|
|
1458 |
gloader->current.num_subglyphs + 4 )) != 0 )
|
|
|
1459 |
goto Exit;
|
|
|
1460 |
|
|
|
1461 |
subglyph = gloader->current.subglyphs + gloader->base.num_subglyphs;
|
|
|
1462 |
limit = gloader->current.num_subglyphs;
|
|
|
1463 |
|
|
|
1464 |
for ( i = 0; i < limit; ++i, ++subglyph )
|
|
|
1465 |
{
|
|
|
1466 |
if ( subglyph->flags & ARGS_ARE_XY_VALUES )
|
|
|
1467 |
{
|
|
|
1468 |
/* XXX: overflow check for subglyph->{arg1,arg2}. */
|
|
|
1469 |
/* deltas[i].{x,y} must be within signed 16-bit, */
|
|
|
1470 |
/* but the restriction of summed delta is not clear */
|
|
|
1471 |
subglyph->arg1 += (FT_Int16)deltas[i].x;
|
|
|
1472 |
subglyph->arg2 += (FT_Int16)deltas[i].y;
|
|
|
1473 |
}
|
|
|
1474 |
}
|
|
|
1475 |
|
|
|
1476 |
loader->pp1.x += deltas[i + 0].x; loader->pp1.y += deltas[i + 0].y;
|
|
|
1477 |
loader->pp2.x += deltas[i + 1].x; loader->pp2.y += deltas[i + 1].y;
|
|
|
1478 |
loader->pp3.x += deltas[i + 2].x; loader->pp3.y += deltas[i + 2].y;
|
|
|
1479 |
loader->pp4.x += deltas[i + 3].x; loader->pp4.y += deltas[i + 3].y;
|
|
|
1480 |
|
|
|
1481 |
FT_FREE( deltas );
|
|
|
1482 |
}
|
|
|
1483 |
|
|
|
1484 |
#endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */
|
|
|
1485 |
|
|
|
1486 |
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
|
|
|
1487 |
{
|
|
|
1488 |
loader->pp1.x = FT_MulFix( loader->pp1.x, x_scale );
|
|
|
1489 |
loader->pp2.x = FT_MulFix( loader->pp2.x, x_scale );
|
|
|
1490 |
loader->pp3.y = FT_MulFix( loader->pp3.y, y_scale );
|
|
|
1491 |
loader->pp4.y = FT_MulFix( loader->pp4.y, y_scale );
|
|
|
1492 |
}
|
|
|
1493 |
|
|
|
1494 |
/* if the flag FT_LOAD_NO_RECURSE is set, we return the subglyph */
|
|
|
1495 |
/* `as is' in the glyph slot (the client application will be */
|
|
|
1496 |
/* responsible for interpreting these data)... */
|
|
|
1497 |
if ( loader->load_flags & FT_LOAD_NO_RECURSE )
|
|
|
1498 |
{
|
|
|
1499 |
FT_GlyphLoader_Add( gloader );
|
|
|
1500 |
loader->glyph->format = FT_GLYPH_FORMAT_COMPOSITE;
|
|
|
1501 |
|
|
|
1502 |
goto Exit;
|
|
|
1503 |
}
|
|
|
1504 |
|
|
|
1505 |
/*********************************************************************/
|
|
|
1506 |
/*********************************************************************/
|
|
|
1507 |
/*********************************************************************/
|
|
|
1508 |
|
|
|
1509 |
{
|
|
|
1510 |
FT_UInt n, num_base_points;
|
|
|
1511 |
FT_SubGlyph subglyph = 0;
|
|
|
1512 |
|
|
|
1513 |
FT_UInt num_points = start_point;
|
|
|
1514 |
FT_UInt num_subglyphs = gloader->current.num_subglyphs;
|
|
|
1515 |
FT_UInt num_base_subgs = gloader->base.num_subglyphs;
|
|
|
1516 |
|
|
|
1517 |
FT_Stream old_stream = loader->stream;
|
|
|
1518 |
FT_Int old_byte_len = loader->byte_len;
|
|
|
1519 |
|
|
|
1520 |
|
|
|
1521 |
FT_GlyphLoader_Add( gloader );
|
|
|
1522 |
|
|
|
1523 |
/* read each subglyph independently */
|
|
|
1524 |
for ( n = 0; n < num_subglyphs; n++ )
|
|
|
1525 |
{
|
|
|
1526 |
FT_Vector pp[4];
|
|
|
1527 |
|
|
|
1528 |
|
|
|
1529 |
/* Each time we call load_truetype_glyph in this loop, the */
|
|
|
1530 |
/* value of `gloader.base.subglyphs' can change due to table */
|
|
|
1531 |
/* reallocations. We thus need to recompute the subglyph */
|
|
|
1532 |
/* pointer on each iteration. */
|
|
|
1533 |
subglyph = gloader->base.subglyphs + num_base_subgs + n;
|
|
|
1534 |
|
|
|
1535 |
pp[0] = loader->pp1;
|
|
|
1536 |
pp[1] = loader->pp2;
|
|
|
1537 |
pp[2] = loader->pp3;
|
|
|
1538 |
pp[3] = loader->pp4;
|
|
|
1539 |
|
|
|
1540 |
num_base_points = gloader->base.outline.n_points;
|
|
|
1541 |
|
|
|
1542 |
error = load_truetype_glyph( loader, subglyph->index,
|
|
|
1543 |
recurse_count + 1, FALSE );
|
|
|
1544 |
if ( error )
|
|
|
1545 |
goto Exit;
|
|
|
1546 |
|
|
|
1547 |
/* restore subglyph pointer */
|
|
|
1548 |
subglyph = gloader->base.subglyphs + num_base_subgs + n;
|
|
|
1549 |
|
|
|
1550 |
if ( !( subglyph->flags & USE_MY_METRICS ) )
|
|
|
1551 |
{
|
|
|
1552 |
loader->pp1 = pp[0];
|
|
|
1553 |
loader->pp2 = pp[1];
|
|
|
1554 |
loader->pp3 = pp[2];
|
|
|
1555 |
loader->pp4 = pp[3];
|
|
|
1556 |
}
|
|
|
1557 |
|
|
|
1558 |
num_points = gloader->base.outline.n_points;
|
|
|
1559 |
|
|
|
1560 |
if ( num_points == num_base_points )
|
|
|
1561 |
continue;
|
|
|
1562 |
|
|
|
1563 |
/* gloader->base.outline consists of three parts: */
|
|
|
1564 |
/* 0 -(1)-> start_point -(2)-> num_base_points -(3)-> n_points. */
|
|
|
1565 |
/* */
|
|
|
1566 |
/* (1): exists from the beginning */
|
|
|
1567 |
/* (2): components that have been loaded so far */
|
|
|
1568 |
/* (3): the newly loaded component */
|
|
|
1569 |
TT_Process_Composite_Component( loader, subglyph, start_point,
|
|
|
1570 |
num_base_points );
|
|
|
1571 |
}
|
|
|
1572 |
|
|
|
1573 |
loader->stream = old_stream;
|
|
|
1574 |
loader->byte_len = old_byte_len;
|
|
|
1575 |
|
|
|
1576 |
/* process the glyph */
|
|
|
1577 |
loader->ins_pos = ins_pos;
|
|
|
1578 |
if ( IS_HINTED( loader->load_flags ) &&
|
|
|
1579 |
|
|
|
1580 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
1581 |
|
|
|
1582 |
subglyph->flags & WE_HAVE_INSTR &&
|
|
|
1583 |
|
|
|
1584 |
#endif
|
|
|
1585 |
|
|
|
1586 |
num_points > start_point )
|
|
|
1587 |
TT_Process_Composite_Glyph( loader, start_point, start_contour );
|
|
|
1588 |
|
|
|
1589 |
}
|
|
|
1590 |
}
|
|
|
1591 |
else
|
|
|
1592 |
{
|
|
|
1593 |
/* invalid composite count (negative but not -1) */
|
|
|
1594 |
error = TT_Err_Invalid_Outline;
|
|
|
1595 |
goto Exit;
|
|
|
1596 |
}
|
|
|
1597 |
|
|
|
1598 |
/***********************************************************************/
|
|
|
1599 |
/***********************************************************************/
|
|
|
1600 |
/***********************************************************************/
|
|
|
1601 |
|
|
|
1602 |
Exit:
|
|
|
1603 |
|
|
|
1604 |
if ( opened_frame )
|
|
|
1605 |
face->forget_glyph_frame( loader );
|
|
|
1606 |
|
|
|
1607 |
#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
|
|
1608 |
|
|
|
1609 |
if ( glyph_data_loaded )
|
|
|
1610 |
face->root.internal->incremental_interface->funcs->free_glyph_data(
|
|
|
1611 |
face->root.internal->incremental_interface->object,
|
|
|
1612 |
&glyph_data );
|
|
|
1613 |
|
|
|
1614 |
#endif
|
|
|
1615 |
|
|
|
1616 |
return error;
|
|
|
1617 |
}
|
|
|
1618 |
|
|
|
1619 |
|
|
|
1620 |
static FT_Error
|
|
|
1621 |
compute_glyph_metrics( TT_Loader loader,
|
|
|
1622 |
FT_UInt glyph_index )
|
|
|
1623 |
{
|
|
|
1624 |
FT_BBox bbox;
|
|
|
1625 |
TT_Face face = (TT_Face)loader->face;
|
|
|
1626 |
FT_Fixed y_scale;
|
|
|
1627 |
TT_GlyphSlot glyph = loader->glyph;
|
|
|
1628 |
TT_Size size = (TT_Size)loader->size;
|
|
|
1629 |
|
|
|
1630 |
|
|
|
1631 |
y_scale = 0x10000L;
|
|
|
1632 |
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
|
|
|
1633 |
y_scale = size->root.metrics.y_scale;
|
|
|
1634 |
|
|
|
1635 |
if ( glyph->format != FT_GLYPH_FORMAT_COMPOSITE )
|
|
|
1636 |
FT_Outline_Get_CBox( &glyph->outline, &bbox );
|
|
|
1637 |
else
|
|
|
1638 |
bbox = loader->bbox;
|
|
|
1639 |
|
|
|
1640 |
/* get the device-independent horizontal advance; it is scaled later */
|
|
|
1641 |
/* by the base layer. */
|
|
|
1642 |
glyph->linearHoriAdvance = loader->linear;
|
|
|
1643 |
|
|
|
1644 |
glyph->metrics.horiBearingX = bbox.xMin;
|
|
|
1645 |
glyph->metrics.horiBearingY = bbox.yMax;
|
|
|
1646 |
glyph->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
|
|
|
1647 |
|
|
|
1648 |
/* adjust advance width to the value contained in the hdmx table */
|
|
|
1649 |
if ( !face->postscript.isFixedPitch &&
|
|
|
1650 |
IS_HINTED( loader->load_flags ) )
|
|
|
1651 |
{
|
|
|
1652 |
FT_Byte* widthp;
|
|
|
1653 |
|
|
|
1654 |
|
|
|
1655 |
widthp = tt_face_get_device_metrics( face,
|
|
|
1656 |
size->root.metrics.x_ppem,
|
|
|
1657 |
glyph_index );
|
|
|
1658 |
|
|
|
1659 |
if ( widthp )
|
|
|
1660 |
glyph->metrics.horiAdvance = *widthp << 6;
|
|
|
1661 |
}
|
|
|
1662 |
|
|
|
1663 |
/* set glyph dimensions */
|
|
|
1664 |
glyph->metrics.width = bbox.xMax - bbox.xMin;
|
|
|
1665 |
glyph->metrics.height = bbox.yMax - bbox.yMin;
|
|
|
1666 |
|
|
|
1667 |
/* Now take care of vertical metrics. In the case where there is */
|
|
|
1668 |
/* no vertical information within the font (relatively common), */
|
|
|
1669 |
/* create some metrics manually */
|
|
|
1670 |
{
|
|
|
1671 |
FT_Pos top; /* scaled vertical top side bearing */
|
|
|
1672 |
FT_Pos advance; /* scaled vertical advance height */
|
|
|
1673 |
|
|
|
1674 |
|
|
|
1675 |
/* Get the unscaled top bearing and advance height. */
|
|
|
1676 |
if ( face->vertical_info &&
|
|
|
1677 |
face->vertical.number_Of_VMetrics > 0 )
|
|
|
1678 |
{
|
|
|
1679 |
top = (FT_Short)FT_DivFix( loader->pp3.y - bbox.yMax,
|
|
|
1680 |
y_scale );
|
|
|
1681 |
|
|
|
1682 |
if ( loader->pp3.y <= loader->pp4.y )
|
|
|
1683 |
advance = 0;
|
|
|
1684 |
else
|
|
|
1685 |
advance = (FT_UShort)FT_DivFix( loader->pp3.y - loader->pp4.y,
|
|
|
1686 |
y_scale );
|
|
|
1687 |
}
|
|
|
1688 |
else
|
|
|
1689 |
{
|
|
|
1690 |
FT_Pos height;
|
|
|
1691 |
|
|
|
1692 |
|
|
|
1693 |
/* XXX Compute top side bearing and advance height in */
|
|
|
1694 |
/* Get_VMetrics instead of here. */
|
|
|
1695 |
|
|
|
1696 |
/* NOTE: The OS/2 values are the only `portable' ones, */
|
|
|
1697 |
/* which is why we use them, if there is an OS/2 */
|
|
|
1698 |
/* table in the font. Otherwise, we use the */
|
|
|
1699 |
/* values defined in the horizontal header. */
|
|
|
1700 |
|
|
|
1701 |
height = (FT_Short)FT_DivFix( bbox.yMax - bbox.yMin,
|
|
|
1702 |
y_scale );
|
|
|
1703 |
if ( face->os2.version != 0xFFFFU )
|
|
|
1704 |
advance = (FT_Pos)( face->os2.sTypoAscender -
|
|
|
1705 |
face->os2.sTypoDescender );
|
|
|
1706 |
else
|
|
|
1707 |
advance = (FT_Pos)( face->horizontal.Ascender -
|
|
|
1708 |
face->horizontal.Descender );
|
|
|
1709 |
|
|
|
1710 |
top = ( advance - height ) / 2;
|
|
|
1711 |
}
|
|
|
1712 |
|
|
|
1713 |
#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
|
|
1714 |
{
|
|
|
1715 |
FT_Incremental_InterfaceRec* incr;
|
|
|
1716 |
FT_Incremental_MetricsRec metrics;
|
|
|
1717 |
FT_Error error;
|
|
|
1718 |
|
|
|
1719 |
|
|
|
1720 |
incr = face->root.internal->incremental_interface;
|
|
|
1721 |
|
|
|
1722 |
/* If this is an incrementally loaded font see if there are */
|
|
|
1723 |
/* overriding metrics for this glyph. */
|
|
|
1724 |
if ( incr && incr->funcs->get_glyph_metrics )
|
|
|
1725 |
{
|
|
|
1726 |
metrics.bearing_x = 0;
|
|
|
1727 |
metrics.bearing_y = top;
|
|
|
1728 |
metrics.advance = advance;
|
|
|
1729 |
|
|
|
1730 |
error = incr->funcs->get_glyph_metrics( incr->object,
|
|
|
1731 |
glyph_index,
|
|
|
1732 |
TRUE,
|
|
|
1733 |
&metrics );
|
|
|
1734 |
if ( error )
|
|
|
1735 |
return error;
|
|
|
1736 |
|
|
|
1737 |
top = metrics.bearing_y;
|
|
|
1738 |
advance = metrics.advance;
|
|
|
1739 |
}
|
|
|
1740 |
}
|
|
|
1741 |
|
|
|
1742 |
/* GWW: Do vertical metrics get loaded incrementally too? */
|
|
|
1743 |
|
|
|
1744 |
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
|
|
|
1745 |
|
|
|
1746 |
glyph->linearVertAdvance = advance;
|
|
|
1747 |
|
|
|
1748 |
/* scale the metrics */
|
|
|
1749 |
if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) )
|
|
|
1750 |
{
|
|
|
1751 |
top = FT_MulFix( top, y_scale );
|
|
|
1752 |
advance = FT_MulFix( advance, y_scale );
|
|
|
1753 |
}
|
|
|
1754 |
|
|
|
1755 |
/* XXX: for now, we have no better algorithm for the lsb, but it */
|
|
|
1756 |
/* should work fine. */
|
|
|
1757 |
/* */
|
|
|
1758 |
glyph->metrics.vertBearingX = glyph->metrics.horiBearingX -
|
|
|
1759 |
glyph->metrics.horiAdvance / 2;
|
|
|
1760 |
glyph->metrics.vertBearingY = top;
|
|
|
1761 |
glyph->metrics.vertAdvance = advance;
|
|
|
1762 |
}
|
|
|
1763 |
|
|
|
1764 |
return 0;
|
|
|
1765 |
}
|
|
|
1766 |
|
|
|
1767 |
|
|
|
1768 |
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
|
|
|
1769 |
|
|
|
1770 |
static FT_Error
|
|
|
1771 |
load_sbit_image( TT_Size size,
|
|
|
1772 |
TT_GlyphSlot glyph,
|
|
|
1773 |
FT_UInt glyph_index,
|
|
|
1774 |
FT_Int32 load_flags )
|
|
|
1775 |
{
|
|
|
1776 |
TT_Face face;
|
|
|
1777 |
SFNT_Service sfnt;
|
|
|
1778 |
FT_Stream stream;
|
|
|
1779 |
FT_Error error;
|
|
|
1780 |
TT_SBit_MetricsRec metrics;
|
|
|
1781 |
|
|
|
1782 |
|
|
|
1783 |
face = (TT_Face)glyph->face;
|
|
|
1784 |
sfnt = (SFNT_Service)face->sfnt;
|
|
|
1785 |
stream = face->root.stream;
|
|
|
1786 |
|
|
|
1787 |
error = sfnt->load_sbit_image( face,
|
|
|
1788 |
size->strike_index,
|
|
|
1789 |
glyph_index,
|
|
|
1790 |
(FT_Int)load_flags,
|
|
|
1791 |
stream,
|
|
|
1792 |
&glyph->bitmap,
|
|
|
1793 |
&metrics );
|
|
|
1794 |
if ( !error )
|
|
|
1795 |
{
|
|
|
1796 |
glyph->outline.n_points = 0;
|
|
|
1797 |
glyph->outline.n_contours = 0;
|
|
|
1798 |
|
|
|
1799 |
glyph->metrics.width = (FT_Pos)metrics.width << 6;
|
|
|
1800 |
glyph->metrics.height = (FT_Pos)metrics.height << 6;
|
|
|
1801 |
|
|
|
1802 |
glyph->metrics.horiBearingX = (FT_Pos)metrics.horiBearingX << 6;
|
|
|
1803 |
glyph->metrics.horiBearingY = (FT_Pos)metrics.horiBearingY << 6;
|
|
|
1804 |
glyph->metrics.horiAdvance = (FT_Pos)metrics.horiAdvance << 6;
|
|
|
1805 |
|
|
|
1806 |
glyph->metrics.vertBearingX = (FT_Pos)metrics.vertBearingX << 6;
|
|
|
1807 |
glyph->metrics.vertBearingY = (FT_Pos)metrics.vertBearingY << 6;
|
|
|
1808 |
glyph->metrics.vertAdvance = (FT_Pos)metrics.vertAdvance << 6;
|
|
|
1809 |
|
|
|
1810 |
glyph->format = FT_GLYPH_FORMAT_BITMAP;
|
|
|
1811 |
|
|
|
1812 |
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
|
|
|
1813 |
{
|
|
|
1814 |
glyph->bitmap_left = metrics.vertBearingX;
|
|
|
1815 |
glyph->bitmap_top = metrics.vertBearingY;
|
|
|
1816 |
}
|
|
|
1817 |
else
|
|
|
1818 |
{
|
|
|
1819 |
glyph->bitmap_left = metrics.horiBearingX;
|
|
|
1820 |
glyph->bitmap_top = metrics.horiBearingY;
|
|
|
1821 |
}
|
|
|
1822 |
}
|
|
|
1823 |
|
|
|
1824 |
return error;
|
|
|
1825 |
}
|
|
|
1826 |
|
|
|
1827 |
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
|
|
|
1828 |
|
|
|
1829 |
|
|
|
1830 |
static FT_Error
|
|
|
1831 |
tt_loader_init( TT_Loader loader,
|
|
|
1832 |
TT_Size size,
|
|
|
1833 |
TT_GlyphSlot glyph,
|
|
|
1834 |
FT_Int32 load_flags,
|
|
|
1835 |
FT_Bool glyf_table_only )
|
|
|
1836 |
{
|
|
|
1837 |
TT_Face face;
|
|
|
1838 |
FT_Stream stream;
|
|
|
1839 |
FT_Bool pedantic = FT_BOOL( load_flags & FT_LOAD_PEDANTIC );
|
|
|
1840 |
|
|
|
1841 |
|
|
|
1842 |
face = (TT_Face)glyph->face;
|
|
|
1843 |
stream = face->root.stream;
|
|
|
1844 |
|
|
|
1845 |
FT_MEM_ZERO( loader, sizeof ( TT_LoaderRec ) );
|
|
|
1846 |
|
|
|
1847 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
1848 |
|
|
|
1849 |
/* load execution context */
|
|
|
1850 |
if ( IS_HINTED( load_flags ) && !glyf_table_only )
|
|
|
1851 |
{
|
|
|
1852 |
TT_ExecContext exec;
|
|
|
1853 |
FT_Bool grayscale;
|
|
|
1854 |
|
|
|
1855 |
|
|
|
1856 |
if ( !size->cvt_ready )
|
|
|
1857 |
{
|
|
|
1858 |
FT_Error error = tt_size_ready_bytecode( size, pedantic );
|
|
|
1859 |
|
|
|
1860 |
|
|
|
1861 |
if ( error )
|
|
|
1862 |
return error;
|
|
|
1863 |
}
|
|
|
1864 |
|
|
|
1865 |
/* query new execution context */
|
|
|
1866 |
exec = size->debug ? size->context
|
|
|
1867 |
: ( (TT_Driver)FT_FACE_DRIVER( face ) )->context;
|
|
|
1868 |
if ( !exec )
|
|
|
1869 |
return TT_Err_Could_Not_Find_Context;
|
|
|
1870 |
|
|
|
1871 |
grayscale =
|
|
|
1872 |
FT_BOOL( FT_LOAD_TARGET_MODE( load_flags ) != FT_RENDER_MODE_MONO );
|
|
|
1873 |
|
|
|
1874 |
TT_Load_Context( exec, face, size );
|
|
|
1875 |
|
|
|
1876 |
/* a change from mono to grayscale rendering (and vice versa) */
|
|
|
1877 |
/* requires a re-execution of the CVT program */
|
|
|
1878 |
if ( grayscale != exec->grayscale )
|
|
|
1879 |
{
|
|
|
1880 |
FT_UInt i;
|
|
|
1881 |
|
|
|
1882 |
|
|
|
1883 |
FT_TRACE4(( "tt_loader_init: grayscale change,"
|
|
|
1884 |
" re-executing `prep' table\n" ));
|
|
|
1885 |
|
|
|
1886 |
exec->grayscale = grayscale;
|
|
|
1887 |
|
|
|
1888 |
for ( i = 0; i < size->cvt_size; i++ )
|
|
|
1889 |
size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale );
|
|
|
1890 |
tt_size_run_prep( size, pedantic );
|
|
|
1891 |
}
|
|
|
1892 |
|
|
|
1893 |
/* see whether the cvt program has disabled hinting */
|
|
|
1894 |
if ( exec->GS.instruct_control & 1 )
|
|
|
1895 |
load_flags |= FT_LOAD_NO_HINTING;
|
|
|
1896 |
|
|
|
1897 |
/* load default graphics state -- if needed */
|
|
|
1898 |
if ( exec->GS.instruct_control & 2 )
|
|
|
1899 |
exec->GS = tt_default_graphics_state;
|
|
|
1900 |
|
|
|
1901 |
exec->pedantic_hinting = FT_BOOL( load_flags & FT_LOAD_PEDANTIC );
|
|
|
1902 |
loader->exec = exec;
|
|
|
1903 |
loader->instructions = exec->glyphIns;
|
|
|
1904 |
}
|
|
|
1905 |
|
|
|
1906 |
#endif /* TT_USE_BYTECODE_INTERPRETER */
|
|
|
1907 |
|
|
|
1908 |
/* seek to the beginning of the glyph table -- for Type 42 fonts */
|
|
|
1909 |
/* the table might be accessed from a Postscript stream or something */
|
|
|
1910 |
/* else... */
|
|
|
1911 |
|
|
|
1912 |
#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
|
|
1913 |
|
|
|
1914 |
if ( face->root.internal->incremental_interface )
|
|
|
1915 |
loader->glyf_offset = 0;
|
|
|
1916 |
else
|
|
|
1917 |
|
|
|
1918 |
#endif
|
|
|
1919 |
|
|
|
1920 |
{
|
|
|
1921 |
FT_Error error = face->goto_table( face, TTAG_glyf, stream, 0 );
|
|
|
1922 |
|
|
|
1923 |
|
|
|
1924 |
if ( error == TT_Err_Table_Missing )
|
|
|
1925 |
loader->glyf_offset = 0;
|
|
|
1926 |
else if ( error )
|
|
|
1927 |
{
|
|
|
1928 |
FT_ERROR(( "tt_loader_init: could not access glyph table\n" ));
|
|
|
1929 |
return error;
|
|
|
1930 |
}
|
|
|
1931 |
else
|
|
|
1932 |
loader->glyf_offset = FT_STREAM_POS();
|
|
|
1933 |
}
|
|
|
1934 |
|
|
|
1935 |
/* get face's glyph loader */
|
|
|
1936 |
if ( !glyf_table_only )
|
|
|
1937 |
{
|
|
|
1938 |
FT_GlyphLoader gloader = glyph->internal->loader;
|
|
|
1939 |
|
|
|
1940 |
|
|
|
1941 |
FT_GlyphLoader_Rewind( gloader );
|
|
|
1942 |
loader->gloader = gloader;
|
|
|
1943 |
}
|
|
|
1944 |
|
|
|
1945 |
loader->load_flags = load_flags;
|
|
|
1946 |
|
|
|
1947 |
loader->face = (FT_Face)face;
|
|
|
1948 |
loader->size = (FT_Size)size;
|
|
|
1949 |
loader->glyph = (FT_GlyphSlot)glyph;
|
|
|
1950 |
loader->stream = stream;
|
|
|
1951 |
|
|
|
1952 |
return TT_Err_Ok;
|
|
|
1953 |
}
|
|
|
1954 |
|
|
|
1955 |
|
|
|
1956 |
/*************************************************************************/
|
|
|
1957 |
/* */
|
|
|
1958 |
/* <Function> */
|
|
|
1959 |
/* TT_Load_Glyph */
|
|
|
1960 |
/* */
|
|
|
1961 |
/* <Description> */
|
|
|
1962 |
/* A function used to load a single glyph within a given glyph slot, */
|
|
|
1963 |
/* for a given size. */
|
|
|
1964 |
/* */
|
|
|
1965 |
/* <Input> */
|
|
|
1966 |
/* glyph :: A handle to a target slot object where the glyph */
|
|
|
1967 |
/* will be loaded. */
|
|
|
1968 |
/* */
|
|
|
1969 |
/* size :: A handle to the source face size at which the glyph */
|
|
|
1970 |
/* must be scaled/loaded. */
|
|
|
1971 |
/* */
|
|
|
1972 |
/* glyph_index :: The index of the glyph in the font file. */
|
|
|
1973 |
/* */
|
|
|
1974 |
/* load_flags :: A flag indicating what to load for this glyph. The */
|
|
|
1975 |
/* FT_LOAD_XXX constants can be used to control the */
|
|
|
1976 |
/* glyph loading process (e.g., whether the outline */
|
|
|
1977 |
/* should be scaled, whether to load bitmaps or not, */
|
|
|
1978 |
/* whether to hint the outline, etc). */
|
|
|
1979 |
/* */
|
|
|
1980 |
/* <Return> */
|
|
|
1981 |
/* FreeType error code. 0 means success. */
|
|
|
1982 |
/* */
|
|
|
1983 |
FT_LOCAL_DEF( FT_Error )
|
|
|
1984 |
TT_Load_Glyph( TT_Size size,
|
|
|
1985 |
TT_GlyphSlot glyph,
|
|
|
1986 |
FT_UInt glyph_index,
|
|
|
1987 |
FT_Int32 load_flags )
|
|
|
1988 |
{
|
|
|
1989 |
TT_Face face;
|
|
|
1990 |
FT_Error error;
|
|
|
1991 |
TT_LoaderRec loader;
|
|
|
1992 |
|
|
|
1993 |
|
|
|
1994 |
face = (TT_Face)glyph->face;
|
|
|
1995 |
error = TT_Err_Ok;
|
|
|
1996 |
|
|
|
1997 |
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
|
|
|
1998 |
|
|
|
1999 |
/* try to load embedded bitmap if any */
|
|
|
2000 |
/* */
|
|
|
2001 |
/* XXX: The convention should be emphasized in */
|
|
|
2002 |
/* the documents because it can be confusing. */
|
|
|
2003 |
if ( size->strike_index != 0xFFFFFFFFUL &&
|
|
|
2004 |
( load_flags & FT_LOAD_NO_BITMAP ) == 0 )
|
|
|
2005 |
{
|
|
|
2006 |
error = load_sbit_image( size, glyph, glyph_index, load_flags );
|
|
|
2007 |
if ( !error )
|
|
|
2008 |
{
|
|
|
2009 |
FT_Face root = &face->root;
|
|
|
2010 |
|
|
|
2011 |
|
|
|
2012 |
if ( FT_IS_SCALABLE( root ) )
|
|
|
2013 |
{
|
|
|
2014 |
/* for the bbox we need the header only */
|
|
|
2015 |
(void)tt_loader_init( &loader, size, glyph, load_flags, TRUE );
|
|
|
2016 |
(void)load_truetype_glyph( &loader, glyph_index, 0, TRUE );
|
|
|
2017 |
glyph->linearHoriAdvance = loader.linear;
|
|
|
2018 |
glyph->linearVertAdvance = loader.top_bearing + loader.bbox.yMax -
|
|
|
2019 |
loader.vadvance;
|
|
|
2020 |
}
|
|
|
2021 |
|
|
|
2022 |
return TT_Err_Ok;
|
|
|
2023 |
}
|
|
|
2024 |
}
|
|
|
2025 |
|
|
|
2026 |
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
|
|
|
2027 |
|
|
|
2028 |
/* if FT_LOAD_NO_SCALE is not set, `ttmetrics' must be valid */
|
|
|
2029 |
if ( !( load_flags & FT_LOAD_NO_SCALE ) && !size->ttmetrics.valid )
|
|
|
2030 |
return TT_Err_Invalid_Size_Handle;
|
|
|
2031 |
|
|
|
2032 |
if ( load_flags & FT_LOAD_SBITS_ONLY )
|
|
|
2033 |
return TT_Err_Invalid_Argument;
|
|
|
2034 |
|
|
|
2035 |
error = tt_loader_init( &loader, size, glyph, load_flags, FALSE );
|
|
|
2036 |
if ( error )
|
|
|
2037 |
return error;
|
|
|
2038 |
|
|
|
2039 |
glyph->format = FT_GLYPH_FORMAT_OUTLINE;
|
|
|
2040 |
glyph->num_subglyphs = 0;
|
|
|
2041 |
glyph->outline.flags = 0;
|
|
|
2042 |
|
|
|
2043 |
/* main loading loop */
|
|
|
2044 |
error = load_truetype_glyph( &loader, glyph_index, 0, FALSE );
|
|
|
2045 |
if ( !error )
|
|
|
2046 |
{
|
|
|
2047 |
if ( glyph->format == FT_GLYPH_FORMAT_COMPOSITE )
|
|
|
2048 |
{
|
|
|
2049 |
glyph->num_subglyphs = loader.gloader->base.num_subglyphs;
|
|
|
2050 |
glyph->subglyphs = loader.gloader->base.subglyphs;
|
|
|
2051 |
}
|
|
|
2052 |
else
|
|
|
2053 |
{
|
|
|
2054 |
glyph->outline = loader.gloader->base.outline;
|
|
|
2055 |
glyph->outline.flags &= ~FT_OUTLINE_SINGLE_PASS;
|
|
|
2056 |
|
|
|
2057 |
/* Translate array so that (0,0) is the glyph's origin. Note */
|
|
|
2058 |
/* that this behaviour is independent on the value of bit 1 of */
|
|
|
2059 |
/* the `flags' field in the `head' table -- at least major */
|
|
|
2060 |
/* applications like Acroread indicate that. */
|
|
|
2061 |
if ( loader.pp1.x )
|
|
|
2062 |
FT_Outline_Translate( &glyph->outline, -loader.pp1.x, 0 );
|
|
|
2063 |
}
|
|
|
2064 |
|
|
|
2065 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
2066 |
|
|
|
2067 |
if ( IS_HINTED( load_flags ) )
|
|
|
2068 |
{
|
|
|
2069 |
if ( loader.exec->GS.scan_control )
|
|
|
2070 |
{
|
|
|
2071 |
/* convert scan conversion mode to FT_OUTLINE_XXX flags */
|
|
|
2072 |
switch ( loader.exec->GS.scan_type )
|
|
|
2073 |
{
|
|
|
2074 |
case 0: /* simple drop-outs including stubs */
|
|
|
2075 |
glyph->outline.flags |= FT_OUTLINE_INCLUDE_STUBS;
|
|
|
2076 |
break;
|
|
|
2077 |
case 1: /* simple drop-outs excluding stubs */
|
|
|
2078 |
/* nothing; it's the default rendering mode */
|
|
|
2079 |
break;
|
|
|
2080 |
case 4: /* smart drop-outs including stubs */
|
|
|
2081 |
glyph->outline.flags |= FT_OUTLINE_SMART_DROPOUTS |
|
|
|
2082 |
FT_OUTLINE_INCLUDE_STUBS;
|
|
|
2083 |
break;
|
|
|
2084 |
case 5: /* smart drop-outs excluding stubs */
|
|
|
2085 |
glyph->outline.flags |= FT_OUTLINE_SMART_DROPOUTS;
|
|
|
2086 |
break;
|
|
|
2087 |
|
|
|
2088 |
default: /* no drop-out control */
|
|
|
2089 |
glyph->outline.flags |= FT_OUTLINE_IGNORE_DROPOUTS;
|
|
|
2090 |
break;
|
|
|
2091 |
}
|
|
|
2092 |
}
|
|
|
2093 |
else
|
|
|
2094 |
glyph->outline.flags |= FT_OUTLINE_IGNORE_DROPOUTS;
|
|
|
2095 |
}
|
|
|
2096 |
|
|
|
2097 |
#endif /* TT_USE_BYTECODE_INTERPRETER */
|
|
|
2098 |
|
|
|
2099 |
compute_glyph_metrics( &loader, glyph_index );
|
|
|
2100 |
}
|
|
|
2101 |
|
|
|
2102 |
/* Set the `high precision' bit flag. */
|
|
|
2103 |
/* This is _critical_ to get correct output for monochrome */
|
|
|
2104 |
/* TrueType glyphs at all sizes using the bytecode interpreter. */
|
|
|
2105 |
/* */
|
|
|
2106 |
if ( !( load_flags & FT_LOAD_NO_SCALE ) &&
|
|
|
2107 |
size->root.metrics.y_ppem < 24 )
|
|
|
2108 |
glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;
|
|
|
2109 |
|
|
|
2110 |
return error;
|
|
|
2111 |
}
|
|
|
2112 |
|
|
|
2113 |
|
|
|
2114 |
/* END */
|