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/***************************************************************************/
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/* */
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/* t1decode.c */
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/* */
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/* PostScript Type 1 decoding routines (body). */
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/* */
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/* Copyright 2000-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 */
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/* 2010 by */
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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_CALC_H
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#include FT_INTERNAL_DEBUG_H
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#include FT_INTERNAL_POSTSCRIPT_HINTS_H
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#include FT_OUTLINE_H
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#include "t1decode.h"
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#include "psobjs.h"
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#include "psauxerr.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_t1decode
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typedef enum T1_Operator_
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{
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op_none = 0,
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op_endchar,
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op_hsbw,
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op_seac,
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op_sbw,
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op_closepath,
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op_hlineto,
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op_hmoveto,
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op_hvcurveto,
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op_rlineto,
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op_rmoveto,
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op_rrcurveto,
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op_vhcurveto,
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op_vlineto,
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op_vmoveto,
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op_dotsection,
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op_hstem,
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op_hstem3,
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op_vstem,
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op_vstem3,
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op_div,
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op_callothersubr,
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op_callsubr,
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op_pop,
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op_return,
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op_setcurrentpoint,
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op_unknown15,
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op_max /* never remove this one */
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} T1_Operator;
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static
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const FT_Int t1_args_count[op_max] =
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{
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0, /* none */
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0, /* endchar */
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2, /* hsbw */
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5, /* seac */
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4, /* sbw */
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0, /* closepath */
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1, /* hlineto */
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1, /* hmoveto */
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4, /* hvcurveto */
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2, /* rlineto */
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2, /* rmoveto */
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6, /* rrcurveto */
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4, /* vhcurveto */
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1, /* vlineto */
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1, /* vmoveto */
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0, /* dotsection */
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2, /* hstem */
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6, /* hstem3 */
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2, /* vstem */
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6, /* vstem3 */
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2, /* div */
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-1, /* callothersubr */
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1, /* callsubr */
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0, /* pop */
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0, /* return */
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2, /* setcurrentpoint */
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2 /* opcode 15 (undocumented and obsolete) */
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};
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/*************************************************************************/
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/* */
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/* <Function> */
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/* t1_lookup_glyph_by_stdcharcode */
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/* */
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/* <Description> */
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/* Looks up a given glyph by its StandardEncoding charcode. Used to */
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/* implement the SEAC Type 1 operator. */
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/* */
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/* <Input> */
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/* face :: The current face object. */
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/* */
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/* charcode :: The character code to look for. */
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/* */
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/* <Return> */
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/* A glyph index in the font face. Returns -1 if the corresponding */
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/* glyph wasn't found. */
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/* */
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static FT_Int
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t1_lookup_glyph_by_stdcharcode( T1_Decoder decoder,
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FT_Int charcode )
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131 |
{
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132 |
FT_UInt n;
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133 |
const FT_String* glyph_name;
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134 |
FT_Service_PsCMaps psnames = decoder->psnames;
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135 |
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136 |
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/* check range of standard char code */
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if ( charcode < 0 || charcode > 255 )
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return -1;
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140 |
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glyph_name = psnames->adobe_std_strings(
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psnames->adobe_std_encoding[charcode]);
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143 |
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for ( n = 0; n < decoder->num_glyphs; n++ )
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{
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FT_String* name = (FT_String*)decoder->glyph_names[n];
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147 |
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148 |
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if ( name &&
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name[0] == glyph_name[0] &&
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ft_strcmp( name, glyph_name ) == 0 )
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return n;
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}
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154 |
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return -1;
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}
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158 |
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159 |
/*************************************************************************/
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160 |
/* */
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161 |
/* <Function> */
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162 |
/* t1operator_seac */
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163 |
/* */
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164 |
/* <Description> */
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/* Implements the `seac' Type 1 operator for a Type 1 decoder. */
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/* */
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/* <Input> */
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/* decoder :: The current CID decoder. */
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/* */
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/* asb :: The accent's side bearing. */
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/* */
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/* adx :: The horizontal offset of the accent. */
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/* */
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/* ady :: The vertical offset of the accent. */
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/* */
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/* bchar :: The base character's StandardEncoding charcode. */
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/* */
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/* achar :: The accent character's StandardEncoding charcode. */
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/* */
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/* <Return> */
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/* FreeType error code. 0 means success. */
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182 |
/* */
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static FT_Error
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184 |
t1operator_seac( T1_Decoder decoder,
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FT_Pos asb,
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FT_Pos adx,
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FT_Pos ady,
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188 |
FT_Int bchar,
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FT_Int achar )
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{
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FT_Error error;
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FT_Int bchar_index, achar_index;
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#if 0
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FT_Int n_base_points;
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FT_Outline* base = decoder->builder.base;
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196 |
#endif
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FT_Vector left_bearing, advance;
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198 |
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#ifdef FT_CONFIG_OPTION_INCREMENTAL
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T1_Face face = (T1_Face)decoder->builder.face;
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#endif
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202 |
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203 |
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if ( decoder->seac )
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{
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FT_ERROR(( "t1operator_seac: invalid nested seac\n" ));
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return PSaux_Err_Syntax_Error;
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}
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209 |
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/* seac weirdness */
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adx += decoder->builder.left_bearing.x;
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212 |
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213 |
/* `glyph_names' is set to 0 for CID fonts which do not */
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/* include an encoding. How can we deal with these? */
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215 |
#ifdef FT_CONFIG_OPTION_INCREMENTAL
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216 |
if ( decoder->glyph_names == 0 &&
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!face->root.internal->incremental_interface )
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218 |
#else
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219 |
if ( decoder->glyph_names == 0 )
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#endif /* FT_CONFIG_OPTION_INCREMENTAL */
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221 |
{
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222 |
FT_ERROR(( "t1operator_seac:"
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" glyph names table not available in this font\n" ));
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224 |
return PSaux_Err_Syntax_Error;
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225 |
}
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226 |
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227 |
#ifdef FT_CONFIG_OPTION_INCREMENTAL
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228 |
if ( face->root.internal->incremental_interface )
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{
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230 |
/* the caller must handle the font encoding also */
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231 |
bchar_index = bchar;
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232 |
achar_index = achar;
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233 |
}
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234 |
else
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235 |
#endif
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236 |
{
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237 |
bchar_index = t1_lookup_glyph_by_stdcharcode( decoder, bchar );
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238 |
achar_index = t1_lookup_glyph_by_stdcharcode( decoder, achar );
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239 |
}
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240 |
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241 |
if ( bchar_index < 0 || achar_index < 0 )
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242 |
{
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243 |
FT_ERROR(( "t1operator_seac:"
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244 |
" invalid seac character code arguments\n" ));
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245 |
return PSaux_Err_Syntax_Error;
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246 |
}
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247 |
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248 |
/* if we are trying to load a composite glyph, do not load the */
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249 |
/* accent character and return the array of subglyphs. */
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250 |
if ( decoder->builder.no_recurse )
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251 |
{
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252 |
FT_GlyphSlot glyph = (FT_GlyphSlot)decoder->builder.glyph;
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253 |
FT_GlyphLoader loader = glyph->internal->loader;
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254 |
FT_SubGlyph subg;
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255 |
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256 |
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257 |
/* reallocate subglyph array if necessary */
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258 |
error = FT_GlyphLoader_CheckSubGlyphs( loader, 2 );
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259 |
if ( error )
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260 |
goto Exit;
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261 |
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262 |
subg = loader->current.subglyphs;
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263 |
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264 |
/* subglyph 0 = base character */
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265 |
subg->index = bchar_index;
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266 |
subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES |
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267 |
FT_SUBGLYPH_FLAG_USE_MY_METRICS;
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268 |
subg->arg1 = 0;
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269 |
subg->arg2 = 0;
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270 |
subg++;
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271 |
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272 |
/* subglyph 1 = accent character */
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273 |
subg->index = achar_index;
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274 |
subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES;
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275 |
subg->arg1 = (FT_Int)FIXED_TO_INT( adx - asb );
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276 |
subg->arg2 = (FT_Int)FIXED_TO_INT( ady );
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277 |
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278 |
/* set up remaining glyph fields */
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279 |
glyph->num_subglyphs = 2;
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280 |
glyph->subglyphs = loader->base.subglyphs;
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281 |
glyph->format = FT_GLYPH_FORMAT_COMPOSITE;
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282 |
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283 |
loader->current.num_subglyphs = 2;
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284 |
goto Exit;
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285 |
}
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286 |
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287 |
/* First load `bchar' in builder */
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288 |
/* now load the unscaled outline */
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289 |
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290 |
FT_GlyphLoader_Prepare( decoder->builder.loader ); /* prepare loader */
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291 |
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292 |
/* the seac operator must not be nested */
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293 |
decoder->seac = TRUE;
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294 |
error = t1_decoder_parse_glyph( decoder, bchar_index );
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295 |
decoder->seac = FALSE;
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296 |
if ( error )
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297 |
goto Exit;
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298 |
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299 |
/* save the left bearing and width of the base character */
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300 |
/* as they will be erased by the next load. */
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301 |
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302 |
left_bearing = decoder->builder.left_bearing;
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303 |
advance = decoder->builder.advance;
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304 |
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305 |
decoder->builder.left_bearing.x = 0;
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306 |
decoder->builder.left_bearing.y = 0;
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307 |
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308 |
decoder->builder.pos_x = adx - asb;
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309 |
decoder->builder.pos_y = ady;
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310 |
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311 |
/* Now load `achar' on top of */
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312 |
/* the base outline */
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313 |
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314 |
/* the seac operator must not be nested */
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315 |
decoder->seac = TRUE;
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316 |
error = t1_decoder_parse_glyph( decoder, achar_index );
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317 |
decoder->seac = FALSE;
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318 |
if ( error )
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319 |
goto Exit;
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320 |
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321 |
/* restore the left side bearing and */
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322 |
/* advance width of the base character */
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323 |
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324 |
decoder->builder.left_bearing = left_bearing;
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325 |
decoder->builder.advance = advance;
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326 |
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327 |
decoder->builder.pos_x = 0;
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328 |
decoder->builder.pos_y = 0;
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329 |
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330 |
Exit:
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331 |
return error;
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332 |
}
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333 |
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334 |
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335 |
/*************************************************************************/
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336 |
/* */
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337 |
/* <Function> */
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338 |
/* t1_decoder_parse_charstrings */
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339 |
/* */
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340 |
/* <Description> */
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341 |
/* Parses a given Type 1 charstrings program. */
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342 |
/* */
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343 |
/* <Input> */
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344 |
/* decoder :: The current Type 1 decoder. */
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345 |
/* */
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346 |
/* charstring_base :: The base address of the charstring stream. */
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347 |
/* */
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348 |
/* charstring_len :: The length in bytes of the charstring stream. */
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349 |
/* */
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350 |
/* <Return> */
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351 |
/* FreeType error code. 0 means success. */
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352 |
/* */
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353 |
FT_LOCAL_DEF( FT_Error )
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354 |
t1_decoder_parse_charstrings( T1_Decoder decoder,
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|
355 |
FT_Byte* charstring_base,
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356 |
FT_UInt charstring_len )
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|
357 |
{
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358 |
FT_Error error;
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359 |
T1_Decoder_Zone zone;
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360 |
FT_Byte* ip;
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361 |
FT_Byte* limit;
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362 |
T1_Builder builder = &decoder->builder;
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363 |
FT_Pos x, y, orig_x, orig_y;
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364 |
FT_Int known_othersubr_result_cnt = 0;
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365 |
FT_Int unknown_othersubr_result_cnt = 0;
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366 |
FT_Bool large_int;
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367 |
FT_Fixed seed;
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368 |
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369 |
T1_Hints_Funcs hinter;
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370 |
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371 |
#ifdef FT_DEBUG_LEVEL_TRACE
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372 |
FT_Bool bol = TRUE;
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373 |
#endif
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374 |
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375 |
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|
376 |
/* compute random seed from stack address of parameter */
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|
377 |
seed = (FT_Fixed)( ( (FT_PtrDist)(char*)&seed ^
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|
378 |
(FT_PtrDist)(char*)&decoder ^
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|
379 |
(FT_PtrDist)(char*)&charstring_base ) &
|
|
|
380 |
FT_ULONG_MAX ) ;
|
|
|
381 |
seed = ( seed ^ ( seed >> 10 ) ^ ( seed >> 20 ) ) & 0xFFFFL;
|
|
|
382 |
if ( seed == 0 )
|
|
|
383 |
seed = 0x7384;
|
|
|
384 |
|
|
|
385 |
/* First of all, initialize the decoder */
|
|
|
386 |
decoder->top = decoder->stack;
|
|
|
387 |
decoder->zone = decoder->zones;
|
|
|
388 |
zone = decoder->zones;
|
|
|
389 |
|
|
|
390 |
builder->parse_state = T1_Parse_Start;
|
|
|
391 |
|
|
|
392 |
hinter = (T1_Hints_Funcs)builder->hints_funcs;
|
|
|
393 |
|
|
|
394 |
/* a font that reads BuildCharArray without setting */
|
|
|
395 |
/* its values first is buggy, but ... */
|
|
|
396 |
FT_ASSERT( ( decoder->len_buildchar == 0 ) ==
|
|
|
397 |
( decoder->buildchar == NULL ) );
|
|
|
398 |
|
|
|
399 |
if ( decoder->len_buildchar > 0 )
|
|
|
400 |
ft_memset( &decoder->buildchar[0],
|
|
|
401 |
0,
|
|
|
402 |
sizeof( decoder->buildchar[0] ) * decoder->len_buildchar );
|
|
|
403 |
|
|
|
404 |
FT_TRACE4(( "\n"
|
|
|
405 |
"Start charstring\n" ));
|
|
|
406 |
|
|
|
407 |
zone->base = charstring_base;
|
|
|
408 |
limit = zone->limit = charstring_base + charstring_len;
|
|
|
409 |
ip = zone->cursor = zone->base;
|
|
|
410 |
|
|
|
411 |
error = PSaux_Err_Ok;
|
|
|
412 |
|
|
|
413 |
x = orig_x = builder->pos_x;
|
|
|
414 |
y = orig_y = builder->pos_y;
|
|
|
415 |
|
|
|
416 |
/* begin hints recording session, if any */
|
|
|
417 |
if ( hinter )
|
|
|
418 |
hinter->open( hinter->hints );
|
|
|
419 |
|
|
|
420 |
large_int = FALSE;
|
|
|
421 |
|
|
|
422 |
/* now, execute loop */
|
|
|
423 |
while ( ip < limit )
|
|
|
424 |
{
|
|
|
425 |
FT_Long* top = decoder->top;
|
|
|
426 |
T1_Operator op = op_none;
|
|
|
427 |
FT_Int32 value = 0;
|
|
|
428 |
|
|
|
429 |
|
|
|
430 |
FT_ASSERT( known_othersubr_result_cnt == 0 ||
|
|
|
431 |
unknown_othersubr_result_cnt == 0 );
|
|
|
432 |
|
|
|
433 |
#ifdef FT_DEBUG_LEVEL_TRACE
|
|
|
434 |
if ( bol )
|
|
|
435 |
{
|
|
|
436 |
FT_TRACE5(( " (%d)", decoder->top - decoder->stack ));
|
|
|
437 |
bol = FALSE;
|
|
|
438 |
}
|
|
|
439 |
#endif
|
|
|
440 |
|
|
|
441 |
/*********************************************************************/
|
|
|
442 |
/* */
|
|
|
443 |
/* Decode operator or operand */
|
|
|
444 |
/* */
|
|
|
445 |
/* */
|
|
|
446 |
|
|
|
447 |
/* first of all, decompress operator or value */
|
|
|
448 |
switch ( *ip++ )
|
|
|
449 |
{
|
|
|
450 |
case 1:
|
|
|
451 |
op = op_hstem;
|
|
|
452 |
break;
|
|
|
453 |
|
|
|
454 |
case 3:
|
|
|
455 |
op = op_vstem;
|
|
|
456 |
break;
|
|
|
457 |
case 4:
|
|
|
458 |
op = op_vmoveto;
|
|
|
459 |
break;
|
|
|
460 |
case 5:
|
|
|
461 |
op = op_rlineto;
|
|
|
462 |
break;
|
|
|
463 |
case 6:
|
|
|
464 |
op = op_hlineto;
|
|
|
465 |
break;
|
|
|
466 |
case 7:
|
|
|
467 |
op = op_vlineto;
|
|
|
468 |
break;
|
|
|
469 |
case 8:
|
|
|
470 |
op = op_rrcurveto;
|
|
|
471 |
break;
|
|
|
472 |
case 9:
|
|
|
473 |
op = op_closepath;
|
|
|
474 |
break;
|
|
|
475 |
case 10:
|
|
|
476 |
op = op_callsubr;
|
|
|
477 |
break;
|
|
|
478 |
case 11:
|
|
|
479 |
op = op_return;
|
|
|
480 |
break;
|
|
|
481 |
|
|
|
482 |
case 13:
|
|
|
483 |
op = op_hsbw;
|
|
|
484 |
break;
|
|
|
485 |
case 14:
|
|
|
486 |
op = op_endchar;
|
|
|
487 |
break;
|
|
|
488 |
|
|
|
489 |
case 15: /* undocumented, obsolete operator */
|
|
|
490 |
op = op_unknown15;
|
|
|
491 |
break;
|
|
|
492 |
|
|
|
493 |
case 21:
|
|
|
494 |
op = op_rmoveto;
|
|
|
495 |
break;
|
|
|
496 |
case 22:
|
|
|
497 |
op = op_hmoveto;
|
|
|
498 |
break;
|
|
|
499 |
|
|
|
500 |
case 30:
|
|
|
501 |
op = op_vhcurveto;
|
|
|
502 |
break;
|
|
|
503 |
case 31:
|
|
|
504 |
op = op_hvcurveto;
|
|
|
505 |
break;
|
|
|
506 |
|
|
|
507 |
case 12:
|
|
|
508 |
if ( ip > limit )
|
|
|
509 |
{
|
|
|
510 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
511 |
" invalid escape (12+EOF)\n" ));
|
|
|
512 |
goto Syntax_Error;
|
|
|
513 |
}
|
|
|
514 |
|
|
|
515 |
switch ( *ip++ )
|
|
|
516 |
{
|
|
|
517 |
case 0:
|
|
|
518 |
op = op_dotsection;
|
|
|
519 |
break;
|
|
|
520 |
case 1:
|
|
|
521 |
op = op_vstem3;
|
|
|
522 |
break;
|
|
|
523 |
case 2:
|
|
|
524 |
op = op_hstem3;
|
|
|
525 |
break;
|
|
|
526 |
case 6:
|
|
|
527 |
op = op_seac;
|
|
|
528 |
break;
|
|
|
529 |
case 7:
|
|
|
530 |
op = op_sbw;
|
|
|
531 |
break;
|
|
|
532 |
case 12:
|
|
|
533 |
op = op_div;
|
|
|
534 |
break;
|
|
|
535 |
case 16:
|
|
|
536 |
op = op_callothersubr;
|
|
|
537 |
break;
|
|
|
538 |
case 17:
|
|
|
539 |
op = op_pop;
|
|
|
540 |
break;
|
|
|
541 |
case 33:
|
|
|
542 |
op = op_setcurrentpoint;
|
|
|
543 |
break;
|
|
|
544 |
|
|
|
545 |
default:
|
|
|
546 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
547 |
" invalid escape (12+%d)\n",
|
|
|
548 |
ip[-1] ));
|
|
|
549 |
goto Syntax_Error;
|
|
|
550 |
}
|
|
|
551 |
break;
|
|
|
552 |
|
|
|
553 |
case 255: /* four bytes integer */
|
|
|
554 |
if ( ip + 4 > limit )
|
|
|
555 |
{
|
|
|
556 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
557 |
" unexpected EOF in integer\n" ));
|
|
|
558 |
goto Syntax_Error;
|
|
|
559 |
}
|
|
|
560 |
|
|
|
561 |
value = (FT_Int32)( ( (FT_Long)ip[0] << 24 ) |
|
|
|
562 |
( (FT_Long)ip[1] << 16 ) |
|
|
|
563 |
( (FT_Long)ip[2] << 8 ) |
|
|
|
564 |
ip[3] );
|
|
|
565 |
ip += 4;
|
|
|
566 |
|
|
|
567 |
/* According to the specification, values > 32000 or < -32000 must */
|
|
|
568 |
/* be followed by a `div' operator to make the result be in the */
|
|
|
569 |
/* range [-32000;32000]. We expect that the second argument of */
|
|
|
570 |
/* `div' is not a large number. Additionally, we don't handle */
|
|
|
571 |
/* stuff like `<large1> <large2> <num> div <num> div' or */
|
|
|
572 |
/* <large1> <large2> <num> div div'. This is probably not allowed */
|
|
|
573 |
/* anyway. */
|
|
|
574 |
if ( value > 32000 || value < -32000 )
|
|
|
575 |
{
|
|
|
576 |
if ( large_int )
|
|
|
577 |
{
|
|
|
578 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
579 |
" no `div' after large integer\n" ));
|
|
|
580 |
}
|
|
|
581 |
else
|
|
|
582 |
large_int = TRUE;
|
|
|
583 |
}
|
|
|
584 |
else
|
|
|
585 |
{
|
|
|
586 |
if ( !large_int )
|
|
|
587 |
value <<= 16;
|
|
|
588 |
}
|
|
|
589 |
|
|
|
590 |
break;
|
|
|
591 |
|
|
|
592 |
default:
|
|
|
593 |
if ( ip[-1] >= 32 )
|
|
|
594 |
{
|
|
|
595 |
if ( ip[-1] < 247 )
|
|
|
596 |
value = (FT_Int32)ip[-1] - 139;
|
|
|
597 |
else
|
|
|
598 |
{
|
|
|
599 |
if ( ++ip > limit )
|
|
|
600 |
{
|
|
|
601 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
602 |
" unexpected EOF in integer\n" ));
|
|
|
603 |
goto Syntax_Error;
|
|
|
604 |
}
|
|
|
605 |
|
|
|
606 |
if ( ip[-2] < 251 )
|
|
|
607 |
value = ( ( (FT_Int32)ip[-2] - 247 ) << 8 ) + ip[-1] + 108;
|
|
|
608 |
else
|
|
|
609 |
value = -( ( ( (FT_Int32)ip[-2] - 251 ) << 8 ) + ip[-1] + 108 );
|
|
|
610 |
}
|
|
|
611 |
|
|
|
612 |
if ( !large_int )
|
|
|
613 |
value <<= 16;
|
|
|
614 |
}
|
|
|
615 |
else
|
|
|
616 |
{
|
|
|
617 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
618 |
" invalid byte (%d)\n", ip[-1] ));
|
|
|
619 |
goto Syntax_Error;
|
|
|
620 |
}
|
|
|
621 |
}
|
|
|
622 |
|
|
|
623 |
if ( unknown_othersubr_result_cnt > 0 )
|
|
|
624 |
{
|
|
|
625 |
switch ( op )
|
|
|
626 |
{
|
|
|
627 |
case op_callsubr:
|
|
|
628 |
case op_return:
|
|
|
629 |
case op_none:
|
|
|
630 |
case op_pop:
|
|
|
631 |
break;
|
|
|
632 |
|
|
|
633 |
default:
|
|
|
634 |
/* all operands have been transferred by previous pops */
|
|
|
635 |
unknown_othersubr_result_cnt = 0;
|
|
|
636 |
break;
|
|
|
637 |
}
|
|
|
638 |
}
|
|
|
639 |
|
|
|
640 |
if ( large_int && !( op == op_none || op == op_div ) )
|
|
|
641 |
{
|
|
|
642 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
643 |
" no `div' after large integer\n" ));
|
|
|
644 |
|
|
|
645 |
large_int = FALSE;
|
|
|
646 |
}
|
|
|
647 |
|
|
|
648 |
/*********************************************************************/
|
|
|
649 |
/* */
|
|
|
650 |
/* Push value on stack, or process operator */
|
|
|
651 |
/* */
|
|
|
652 |
/* */
|
|
|
653 |
if ( op == op_none )
|
|
|
654 |
{
|
|
|
655 |
if ( top - decoder->stack >= T1_MAX_CHARSTRINGS_OPERANDS )
|
|
|
656 |
{
|
|
|
657 |
FT_ERROR(( "t1_decoder_parse_charstrings: stack overflow\n" ));
|
|
|
658 |
goto Syntax_Error;
|
|
|
659 |
}
|
|
|
660 |
|
|
|
661 |
#ifdef FT_DEBUG_LEVEL_TRACE
|
|
|
662 |
if ( large_int )
|
|
|
663 |
FT_TRACE4(( " %ld", value ));
|
|
|
664 |
else
|
|
|
665 |
FT_TRACE4(( " %ld", (FT_Int32)( value >> 16 ) ));
|
|
|
666 |
#endif
|
|
|
667 |
|
|
|
668 |
*top++ = value;
|
|
|
669 |
decoder->top = top;
|
|
|
670 |
}
|
|
|
671 |
else if ( op == op_callothersubr ) /* callothersubr */
|
|
|
672 |
{
|
|
|
673 |
FT_Int subr_no;
|
|
|
674 |
FT_Int arg_cnt;
|
|
|
675 |
|
|
|
676 |
|
|
|
677 |
#ifdef FT_DEBUG_LEVEL_TRACE
|
|
|
678 |
FT_TRACE4(( " callothersubr\n" ));
|
|
|
679 |
bol = TRUE;
|
|
|
680 |
#endif
|
|
|
681 |
|
|
|
682 |
if ( top - decoder->stack < 2 )
|
|
|
683 |
goto Stack_Underflow;
|
|
|
684 |
|
|
|
685 |
top -= 2;
|
|
|
686 |
|
|
|
687 |
subr_no = (FT_Int)( top[1] >> 16 );
|
|
|
688 |
arg_cnt = (FT_Int)( top[0] >> 16 );
|
|
|
689 |
|
|
|
690 |
/***********************************************************/
|
|
|
691 |
/* */
|
|
|
692 |
/* remove all operands to callothersubr from the stack */
|
|
|
693 |
/* */
|
|
|
694 |
/* for handled othersubrs, where we know the number of */
|
|
|
695 |
/* arguments, we increase the stack by the value of */
|
|
|
696 |
/* known_othersubr_result_cnt */
|
|
|
697 |
/* */
|
|
|
698 |
/* for unhandled othersubrs the following pops adjust the */
|
|
|
699 |
/* stack pointer as necessary */
|
|
|
700 |
|
|
|
701 |
if ( arg_cnt > top - decoder->stack )
|
|
|
702 |
goto Stack_Underflow;
|
|
|
703 |
|
|
|
704 |
top -= arg_cnt;
|
|
|
705 |
|
|
|
706 |
known_othersubr_result_cnt = 0;
|
|
|
707 |
unknown_othersubr_result_cnt = 0;
|
|
|
708 |
|
|
|
709 |
/* XXX TODO: The checks to `arg_count == <whatever>' */
|
|
|
710 |
/* might not be correct; an othersubr expects a certain */
|
|
|
711 |
/* number of operands on the PostScript stack (as opposed */
|
|
|
712 |
/* to the T1 stack) but it doesn't have to put them there */
|
|
|
713 |
/* by itself; previous othersubrs might have left the */
|
|
|
714 |
/* operands there if they were not followed by an */
|
|
|
715 |
/* appropriate number of pops */
|
|
|
716 |
/* */
|
|
|
717 |
/* On the other hand, Adobe Reader 7.0.8 for Linux doesn't */
|
|
|
718 |
/* accept a font that contains charstrings like */
|
|
|
719 |
/* */
|
|
|
720 |
/* 100 200 2 20 callothersubr */
|
|
|
721 |
/* 300 1 20 callothersubr pop */
|
|
|
722 |
/* */
|
|
|
723 |
/* Perhaps this is the reason why BuildCharArray exists. */
|
|
|
724 |
|
|
|
725 |
switch ( subr_no )
|
|
|
726 |
{
|
|
|
727 |
case 1: /* start flex feature */
|
|
|
728 |
if ( arg_cnt != 0 )
|
|
|
729 |
goto Unexpected_OtherSubr;
|
|
|
730 |
|
|
|
731 |
decoder->flex_state = 1;
|
|
|
732 |
decoder->num_flex_vectors = 0;
|
|
|
733 |
if ( ( error = t1_builder_start_point( builder, x, y ) )
|
|
|
734 |
!= PSaux_Err_Ok ||
|
|
|
735 |
( error = t1_builder_check_points( builder, 6 ) )
|
|
|
736 |
!= PSaux_Err_Ok )
|
|
|
737 |
goto Fail;
|
|
|
738 |
break;
|
|
|
739 |
|
|
|
740 |
case 2: /* add flex vectors */
|
|
|
741 |
{
|
|
|
742 |
FT_Int idx;
|
|
|
743 |
|
|
|
744 |
|
|
|
745 |
if ( arg_cnt != 0 )
|
|
|
746 |
goto Unexpected_OtherSubr;
|
|
|
747 |
|
|
|
748 |
/* note that we should not add a point for index 0; */
|
|
|
749 |
/* this will move our current position to the flex */
|
|
|
750 |
/* point without adding any point to the outline */
|
|
|
751 |
idx = decoder->num_flex_vectors++;
|
|
|
752 |
if ( idx > 0 && idx < 7 )
|
|
|
753 |
t1_builder_add_point( builder,
|
|
|
754 |
x,
|
|
|
755 |
y,
|
|
|
756 |
(FT_Byte)( idx == 3 || idx == 6 ) );
|
|
|
757 |
}
|
|
|
758 |
break;
|
|
|
759 |
|
|
|
760 |
case 0: /* end flex feature */
|
|
|
761 |
if ( arg_cnt != 3 )
|
|
|
762 |
goto Unexpected_OtherSubr;
|
|
|
763 |
|
|
|
764 |
if ( decoder->flex_state == 0 ||
|
|
|
765 |
decoder->num_flex_vectors != 7 )
|
|
|
766 |
{
|
|
|
767 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
768 |
" unexpected flex end\n" ));
|
|
|
769 |
goto Syntax_Error;
|
|
|
770 |
}
|
|
|
771 |
|
|
|
772 |
/* the two `results' are popped by the following setcurrentpoint */
|
|
|
773 |
top[0] = x;
|
|
|
774 |
top[1] = y;
|
|
|
775 |
known_othersubr_result_cnt = 2;
|
|
|
776 |
break;
|
|
|
777 |
|
|
|
778 |
case 3: /* change hints */
|
|
|
779 |
if ( arg_cnt != 1 )
|
|
|
780 |
goto Unexpected_OtherSubr;
|
|
|
781 |
|
|
|
782 |
known_othersubr_result_cnt = 1;
|
|
|
783 |
|
|
|
784 |
if ( hinter )
|
|
|
785 |
hinter->reset( hinter->hints, builder->current->n_points );
|
|
|
786 |
break;
|
|
|
787 |
|
|
|
788 |
case 12:
|
|
|
789 |
case 13:
|
|
|
790 |
/* counter control hints, clear stack */
|
|
|
791 |
top = decoder->stack;
|
|
|
792 |
break;
|
|
|
793 |
|
|
|
794 |
case 14:
|
|
|
795 |
case 15:
|
|
|
796 |
case 16:
|
|
|
797 |
case 17:
|
|
|
798 |
case 18: /* multiple masters */
|
|
|
799 |
{
|
|
|
800 |
PS_Blend blend = decoder->blend;
|
|
|
801 |
FT_UInt num_points, nn, mm;
|
|
|
802 |
FT_Long* delta;
|
|
|
803 |
FT_Long* values;
|
|
|
804 |
|
|
|
805 |
|
|
|
806 |
if ( !blend )
|
|
|
807 |
{
|
|
|
808 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
809 |
" unexpected multiple masters operator\n" ));
|
|
|
810 |
goto Syntax_Error;
|
|
|
811 |
}
|
|
|
812 |
|
|
|
813 |
num_points = (FT_UInt)subr_no - 13 + ( subr_no == 18 );
|
|
|
814 |
if ( arg_cnt != (FT_Int)( num_points * blend->num_designs ) )
|
|
|
815 |
{
|
|
|
816 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
817 |
" incorrect number of multiple masters arguments\n" ));
|
|
|
818 |
goto Syntax_Error;
|
|
|
819 |
}
|
|
|
820 |
|
|
|
821 |
/* we want to compute: */
|
|
|
822 |
/* */
|
|
|
823 |
/* a0*w0 + a1*w1 + ... + ak*wk */
|
|
|
824 |
/* */
|
|
|
825 |
/* but we only have the a0, a1-a0, a2-a0, .. ak-a0 */
|
|
|
826 |
/* however, given that w0 + w1 + ... + wk == 1, we can */
|
|
|
827 |
/* rewrite it easily as: */
|
|
|
828 |
/* */
|
|
|
829 |
/* a0 + (a1-a0)*w1 + (a2-a0)*w2 + .. + (ak-a0)*wk */
|
|
|
830 |
/* */
|
|
|
831 |
/* where k == num_designs-1 */
|
|
|
832 |
/* */
|
|
|
833 |
/* I guess that's why it's written in this `compact' */
|
|
|
834 |
/* form. */
|
|
|
835 |
/* */
|
|
|
836 |
delta = top + num_points;
|
|
|
837 |
values = top;
|
|
|
838 |
for ( nn = 0; nn < num_points; nn++ )
|
|
|
839 |
{
|
|
|
840 |
FT_Long tmp = values[0];
|
|
|
841 |
|
|
|
842 |
|
|
|
843 |
for ( mm = 1; mm < blend->num_designs; mm++ )
|
|
|
844 |
tmp += FT_MulFix( *delta++, blend->weight_vector[mm] );
|
|
|
845 |
|
|
|
846 |
*values++ = tmp;
|
|
|
847 |
}
|
|
|
848 |
|
|
|
849 |
known_othersubr_result_cnt = num_points;
|
|
|
850 |
break;
|
|
|
851 |
}
|
|
|
852 |
|
|
|
853 |
case 19:
|
|
|
854 |
/* <idx> 1 19 callothersubr */
|
|
|
855 |
/* => replace elements starting from index cvi( <idx> ) */
|
|
|
856 |
/* of BuildCharArray with WeightVector */
|
|
|
857 |
{
|
|
|
858 |
FT_Int idx;
|
|
|
859 |
PS_Blend blend = decoder->blend;
|
|
|
860 |
|
|
|
861 |
|
|
|
862 |
if ( arg_cnt != 1 || blend == NULL )
|
|
|
863 |
goto Unexpected_OtherSubr;
|
|
|
864 |
|
|
|
865 |
idx = (FT_Int)( top[0] >> 16 );
|
|
|
866 |
|
|
|
867 |
if ( idx < 0 ||
|
|
|
868 |
idx + blend->num_designs > decoder->len_buildchar )
|
|
|
869 |
goto Unexpected_OtherSubr;
|
|
|
870 |
|
|
|
871 |
ft_memcpy( &decoder->buildchar[idx],
|
|
|
872 |
blend->weight_vector,
|
|
|
873 |
blend->num_designs *
|
|
|
874 |
sizeof( blend->weight_vector[0] ) );
|
|
|
875 |
}
|
|
|
876 |
break;
|
|
|
877 |
|
|
|
878 |
case 20:
|
|
|
879 |
/* <arg1> <arg2> 2 20 callothersubr pop */
|
|
|
880 |
/* ==> push <arg1> + <arg2> onto T1 stack */
|
|
|
881 |
if ( arg_cnt != 2 )
|
|
|
882 |
goto Unexpected_OtherSubr;
|
|
|
883 |
|
|
|
884 |
top[0] += top[1]; /* XXX (over|under)flow */
|
|
|
885 |
|
|
|
886 |
known_othersubr_result_cnt = 1;
|
|
|
887 |
break;
|
|
|
888 |
|
|
|
889 |
case 21:
|
|
|
890 |
/* <arg1> <arg2> 2 21 callothersubr pop */
|
|
|
891 |
/* ==> push <arg1> - <arg2> onto T1 stack */
|
|
|
892 |
if ( arg_cnt != 2 )
|
|
|
893 |
goto Unexpected_OtherSubr;
|
|
|
894 |
|
|
|
895 |
top[0] -= top[1]; /* XXX (over|under)flow */
|
|
|
896 |
|
|
|
897 |
known_othersubr_result_cnt = 1;
|
|
|
898 |
break;
|
|
|
899 |
|
|
|
900 |
case 22:
|
|
|
901 |
/* <arg1> <arg2> 2 22 callothersubr pop */
|
|
|
902 |
/* ==> push <arg1> * <arg2> onto T1 stack */
|
|
|
903 |
if ( arg_cnt != 2 )
|
|
|
904 |
goto Unexpected_OtherSubr;
|
|
|
905 |
|
|
|
906 |
top[0] = FT_MulFix( top[0], top[1] );
|
|
|
907 |
|
|
|
908 |
known_othersubr_result_cnt = 1;
|
|
|
909 |
break;
|
|
|
910 |
|
|
|
911 |
case 23:
|
|
|
912 |
/* <arg1> <arg2> 2 23 callothersubr pop */
|
|
|
913 |
/* ==> push <arg1> / <arg2> onto T1 stack */
|
|
|
914 |
if ( arg_cnt != 2 || top[1] == 0 )
|
|
|
915 |
goto Unexpected_OtherSubr;
|
|
|
916 |
|
|
|
917 |
top[0] = FT_DivFix( top[0], top[1] );
|
|
|
918 |
|
|
|
919 |
known_othersubr_result_cnt = 1;
|
|
|
920 |
break;
|
|
|
921 |
|
|
|
922 |
case 24:
|
|
|
923 |
/* <val> <idx> 2 24 callothersubr */
|
|
|
924 |
/* ==> set BuildCharArray[cvi( <idx> )] = <val> */
|
|
|
925 |
{
|
|
|
926 |
FT_Int idx;
|
|
|
927 |
PS_Blend blend = decoder->blend;
|
|
|
928 |
|
|
|
929 |
|
|
|
930 |
if ( arg_cnt != 2 || blend == NULL )
|
|
|
931 |
goto Unexpected_OtherSubr;
|
|
|
932 |
|
|
|
933 |
idx = (FT_Int)( top[1] >> 16 );
|
|
|
934 |
|
|
|
935 |
if ( idx < 0 || (FT_UInt) idx >= decoder->len_buildchar )
|
|
|
936 |
goto Unexpected_OtherSubr;
|
|
|
937 |
|
|
|
938 |
decoder->buildchar[idx] = top[0];
|
|
|
939 |
}
|
|
|
940 |
break;
|
|
|
941 |
|
|
|
942 |
case 25:
|
|
|
943 |
/* <idx> 1 25 callothersubr pop */
|
|
|
944 |
/* ==> push BuildCharArray[cvi( idx )] */
|
|
|
945 |
/* onto T1 stack */
|
|
|
946 |
{
|
|
|
947 |
FT_Int idx;
|
|
|
948 |
PS_Blend blend = decoder->blend;
|
|
|
949 |
|
|
|
950 |
|
|
|
951 |
if ( arg_cnt != 1 || blend == NULL )
|
|
|
952 |
goto Unexpected_OtherSubr;
|
|
|
953 |
|
|
|
954 |
idx = (FT_Int)( top[0] >> 16 );
|
|
|
955 |
|
|
|
956 |
if ( idx < 0 || (FT_UInt) idx >= decoder->len_buildchar )
|
|
|
957 |
goto Unexpected_OtherSubr;
|
|
|
958 |
|
|
|
959 |
top[0] = decoder->buildchar[idx];
|
|
|
960 |
}
|
|
|
961 |
|
|
|
962 |
known_othersubr_result_cnt = 1;
|
|
|
963 |
break;
|
|
|
964 |
|
|
|
965 |
#if 0
|
|
|
966 |
case 26:
|
|
|
967 |
/* <val> mark <idx> ==> set BuildCharArray[cvi( <idx> )] = <val>, */
|
|
|
968 |
/* leave mark on T1 stack */
|
|
|
969 |
/* <val> <idx> ==> set BuildCharArray[cvi( <idx> )] = <val> */
|
|
|
970 |
XXX which routine has left its mark on the (PostScript) stack?;
|
|
|
971 |
break;
|
|
|
972 |
#endif
|
|
|
973 |
|
|
|
974 |
case 27:
|
|
|
975 |
/* <res1> <res2> <val1> <val2> 4 27 callothersubr pop */
|
|
|
976 |
/* ==> push <res1> onto T1 stack if <val1> <= <val2>, */
|
|
|
977 |
/* otherwise push <res2> */
|
|
|
978 |
if ( arg_cnt != 4 )
|
|
|
979 |
goto Unexpected_OtherSubr;
|
|
|
980 |
|
|
|
981 |
if ( top[2] > top[3] )
|
|
|
982 |
top[0] = top[1];
|
|
|
983 |
|
|
|
984 |
known_othersubr_result_cnt = 1;
|
|
|
985 |
break;
|
|
|
986 |
|
|
|
987 |
case 28:
|
|
|
988 |
/* 0 28 callothersubr pop */
|
|
|
989 |
/* => push random value from interval [0, 1) onto stack */
|
|
|
990 |
if ( arg_cnt != 0 )
|
|
|
991 |
goto Unexpected_OtherSubr;
|
|
|
992 |
|
|
|
993 |
{
|
|
|
994 |
FT_Fixed Rand;
|
|
|
995 |
|
|
|
996 |
|
|
|
997 |
Rand = seed;
|
|
|
998 |
if ( Rand >= 0x8000L )
|
|
|
999 |
Rand++;
|
|
|
1000 |
|
|
|
1001 |
top[0] = Rand;
|
|
|
1002 |
|
|
|
1003 |
seed = FT_MulFix( seed, 0x10000L - seed );
|
|
|
1004 |
if ( seed == 0 )
|
|
|
1005 |
seed += 0x2873;
|
|
|
1006 |
}
|
|
|
1007 |
|
|
|
1008 |
known_othersubr_result_cnt = 1;
|
|
|
1009 |
break;
|
|
|
1010 |
|
|
|
1011 |
default:
|
|
|
1012 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
1013 |
" unknown othersubr [%d %d], wish me luck\n",
|
|
|
1014 |
arg_cnt, subr_no ));
|
|
|
1015 |
unknown_othersubr_result_cnt = arg_cnt;
|
|
|
1016 |
break;
|
|
|
1017 |
|
|
|
1018 |
Unexpected_OtherSubr:
|
|
|
1019 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
1020 |
" invalid othersubr [%d %d]\n", arg_cnt, subr_no ));
|
|
|
1021 |
goto Syntax_Error;
|
|
|
1022 |
}
|
|
|
1023 |
|
|
|
1024 |
top += known_othersubr_result_cnt;
|
|
|
1025 |
|
|
|
1026 |
decoder->top = top;
|
|
|
1027 |
}
|
|
|
1028 |
else /* general operator */
|
|
|
1029 |
{
|
|
|
1030 |
FT_Int num_args = t1_args_count[op];
|
|
|
1031 |
|
|
|
1032 |
|
|
|
1033 |
FT_ASSERT( num_args >= 0 );
|
|
|
1034 |
|
|
|
1035 |
if ( top - decoder->stack < num_args )
|
|
|
1036 |
goto Stack_Underflow;
|
|
|
1037 |
|
|
|
1038 |
/* XXX Operators usually take their operands from the */
|
|
|
1039 |
/* bottom of the stack, i.e., the operands are */
|
|
|
1040 |
/* decoder->stack[0], ..., decoder->stack[num_args - 1]; */
|
|
|
1041 |
/* only div, callsubr, and callothersubr are different. */
|
|
|
1042 |
/* In practice it doesn't matter (?). */
|
|
|
1043 |
|
|
|
1044 |
#ifdef FT_DEBUG_LEVEL_TRACE
|
|
|
1045 |
|
|
|
1046 |
switch ( op )
|
|
|
1047 |
{
|
|
|
1048 |
case op_callsubr:
|
|
|
1049 |
case op_div:
|
|
|
1050 |
case op_callothersubr:
|
|
|
1051 |
case op_pop:
|
|
|
1052 |
case op_return:
|
|
|
1053 |
break;
|
|
|
1054 |
|
|
|
1055 |
default:
|
|
|
1056 |
if ( top - decoder->stack != num_args )
|
|
|
1057 |
FT_TRACE0(( "t1_decoder_parse_charstrings:"
|
|
|
1058 |
" too much operands on the stack"
|
|
|
1059 |
" (seen %d, expected %d)\n",
|
|
|
1060 |
top - decoder->stack, num_args ));
|
|
|
1061 |
break;
|
|
|
1062 |
}
|
|
|
1063 |
|
|
|
1064 |
#endif /* FT_DEBUG_LEVEL_TRACE */
|
|
|
1065 |
|
|
|
1066 |
top -= num_args;
|
|
|
1067 |
|
|
|
1068 |
switch ( op )
|
|
|
1069 |
{
|
|
|
1070 |
case op_endchar:
|
|
|
1071 |
FT_TRACE4(( " endchar\n" ));
|
|
|
1072 |
|
|
|
1073 |
t1_builder_close_contour( builder );
|
|
|
1074 |
|
|
|
1075 |
/* close hints recording session */
|
|
|
1076 |
if ( hinter )
|
|
|
1077 |
{
|
|
|
1078 |
if ( hinter->close( hinter->hints, builder->current->n_points ) )
|
|
|
1079 |
goto Syntax_Error;
|
|
|
1080 |
|
|
|
1081 |
/* apply hints to the loaded glyph outline now */
|
|
|
1082 |
hinter->apply( hinter->hints,
|
|
|
1083 |
builder->current,
|
|
|
1084 |
(PSH_Globals)builder->hints_globals,
|
|
|
1085 |
decoder->hint_mode );
|
|
|
1086 |
}
|
|
|
1087 |
|
|
|
1088 |
/* add current outline to the glyph slot */
|
|
|
1089 |
FT_GlyphLoader_Add( builder->loader );
|
|
|
1090 |
|
|
|
1091 |
/* the compiler should optimize away this empty loop but ... */
|
|
|
1092 |
|
|
|
1093 |
#ifdef FT_DEBUG_LEVEL_TRACE
|
|
|
1094 |
|
|
|
1095 |
if ( decoder->len_buildchar > 0 )
|
|
|
1096 |
{
|
|
|
1097 |
FT_UInt i;
|
|
|
1098 |
|
|
|
1099 |
|
|
|
1100 |
FT_TRACE4(( "BuildCharArray = [ " ));
|
|
|
1101 |
|
|
|
1102 |
for ( i = 0; i < decoder->len_buildchar; ++i )
|
|
|
1103 |
FT_TRACE4(( "%d ", decoder->buildchar[ i ] ));
|
|
|
1104 |
|
|
|
1105 |
FT_TRACE4(( "]\n" ));
|
|
|
1106 |
}
|
|
|
1107 |
|
|
|
1108 |
#endif /* FT_DEBUG_LEVEL_TRACE */
|
|
|
1109 |
|
|
|
1110 |
FT_TRACE4(( "\n" ));
|
|
|
1111 |
|
|
|
1112 |
/* return now! */
|
|
|
1113 |
return PSaux_Err_Ok;
|
|
|
1114 |
|
|
|
1115 |
case op_hsbw:
|
|
|
1116 |
FT_TRACE4(( " hsbw" ));
|
|
|
1117 |
|
|
|
1118 |
builder->parse_state = T1_Parse_Have_Width;
|
|
|
1119 |
|
|
|
1120 |
builder->left_bearing.x += top[0];
|
|
|
1121 |
builder->advance.x = top[1];
|
|
|
1122 |
builder->advance.y = 0;
|
|
|
1123 |
|
|
|
1124 |
orig_x = x = builder->pos_x + top[0];
|
|
|
1125 |
orig_y = y = builder->pos_y;
|
|
|
1126 |
|
|
|
1127 |
FT_UNUSED( orig_y );
|
|
|
1128 |
|
|
|
1129 |
/* the `metrics_only' indicates that we only want to compute */
|
|
|
1130 |
/* the glyph's metrics (lsb + advance width), not load the */
|
|
|
1131 |
/* rest of it; so exit immediately */
|
|
|
1132 |
if ( builder->metrics_only )
|
|
|
1133 |
return PSaux_Err_Ok;
|
|
|
1134 |
|
|
|
1135 |
break;
|
|
|
1136 |
|
|
|
1137 |
case op_seac:
|
|
|
1138 |
return t1operator_seac( decoder,
|
|
|
1139 |
top[0],
|
|
|
1140 |
top[1],
|
|
|
1141 |
top[2],
|
|
|
1142 |
(FT_Int)( top[3] >> 16 ),
|
|
|
1143 |
(FT_Int)( top[4] >> 16 ) );
|
|
|
1144 |
|
|
|
1145 |
case op_sbw:
|
|
|
1146 |
FT_TRACE4(( " sbw" ));
|
|
|
1147 |
|
|
|
1148 |
builder->parse_state = T1_Parse_Have_Width;
|
|
|
1149 |
|
|
|
1150 |
builder->left_bearing.x += top[0];
|
|
|
1151 |
builder->left_bearing.y += top[1];
|
|
|
1152 |
builder->advance.x = top[2];
|
|
|
1153 |
builder->advance.y = top[3];
|
|
|
1154 |
|
|
|
1155 |
x = builder->pos_x + top[0];
|
|
|
1156 |
y = builder->pos_y + top[1];
|
|
|
1157 |
|
|
|
1158 |
/* the `metrics_only' indicates that we only want to compute */
|
|
|
1159 |
/* the glyph's metrics (lsb + advance width), not load the */
|
|
|
1160 |
/* rest of it; so exit immediately */
|
|
|
1161 |
if ( builder->metrics_only )
|
|
|
1162 |
return PSaux_Err_Ok;
|
|
|
1163 |
|
|
|
1164 |
break;
|
|
|
1165 |
|
|
|
1166 |
case op_closepath:
|
|
|
1167 |
FT_TRACE4(( " closepath" ));
|
|
|
1168 |
|
|
|
1169 |
/* if there is no path, `closepath' is a no-op */
|
|
|
1170 |
if ( builder->parse_state == T1_Parse_Have_Path ||
|
|
|
1171 |
builder->parse_state == T1_Parse_Have_Moveto )
|
|
|
1172 |
t1_builder_close_contour( builder );
|
|
|
1173 |
|
|
|
1174 |
builder->parse_state = T1_Parse_Have_Width;
|
|
|
1175 |
break;
|
|
|
1176 |
|
|
|
1177 |
case op_hlineto:
|
|
|
1178 |
FT_TRACE4(( " hlineto" ));
|
|
|
1179 |
|
|
|
1180 |
if ( ( error = t1_builder_start_point( builder, x, y ) )
|
|
|
1181 |
!= PSaux_Err_Ok )
|
|
|
1182 |
goto Fail;
|
|
|
1183 |
|
|
|
1184 |
x += top[0];
|
|
|
1185 |
goto Add_Line;
|
|
|
1186 |
|
|
|
1187 |
case op_hmoveto:
|
|
|
1188 |
FT_TRACE4(( " hmoveto" ));
|
|
|
1189 |
|
|
|
1190 |
x += top[0];
|
|
|
1191 |
if ( !decoder->flex_state )
|
|
|
1192 |
{
|
|
|
1193 |
if ( builder->parse_state == T1_Parse_Start )
|
|
|
1194 |
goto Syntax_Error;
|
|
|
1195 |
builder->parse_state = T1_Parse_Have_Moveto;
|
|
|
1196 |
}
|
|
|
1197 |
break;
|
|
|
1198 |
|
|
|
1199 |
case op_hvcurveto:
|
|
|
1200 |
FT_TRACE4(( " hvcurveto" ));
|
|
|
1201 |
|
|
|
1202 |
if ( ( error = t1_builder_start_point( builder, x, y ) )
|
|
|
1203 |
!= PSaux_Err_Ok ||
|
|
|
1204 |
( error = t1_builder_check_points( builder, 3 ) )
|
|
|
1205 |
!= PSaux_Err_Ok )
|
|
|
1206 |
goto Fail;
|
|
|
1207 |
|
|
|
1208 |
x += top[0];
|
|
|
1209 |
t1_builder_add_point( builder, x, y, 0 );
|
|
|
1210 |
x += top[1];
|
|
|
1211 |
y += top[2];
|
|
|
1212 |
t1_builder_add_point( builder, x, y, 0 );
|
|
|
1213 |
y += top[3];
|
|
|
1214 |
t1_builder_add_point( builder, x, y, 1 );
|
|
|
1215 |
break;
|
|
|
1216 |
|
|
|
1217 |
case op_rlineto:
|
|
|
1218 |
FT_TRACE4(( " rlineto" ));
|
|
|
1219 |
|
|
|
1220 |
if ( ( error = t1_builder_start_point( builder, x, y ) )
|
|
|
1221 |
!= PSaux_Err_Ok )
|
|
|
1222 |
goto Fail;
|
|
|
1223 |
|
|
|
1224 |
x += top[0];
|
|
|
1225 |
y += top[1];
|
|
|
1226 |
|
|
|
1227 |
Add_Line:
|
|
|
1228 |
if ( ( error = t1_builder_add_point1( builder, x, y ) )
|
|
|
1229 |
!= PSaux_Err_Ok )
|
|
|
1230 |
goto Fail;
|
|
|
1231 |
break;
|
|
|
1232 |
|
|
|
1233 |
case op_rmoveto:
|
|
|
1234 |
FT_TRACE4(( " rmoveto" ));
|
|
|
1235 |
|
|
|
1236 |
x += top[0];
|
|
|
1237 |
y += top[1];
|
|
|
1238 |
if ( !decoder->flex_state )
|
|
|
1239 |
{
|
|
|
1240 |
if ( builder->parse_state == T1_Parse_Start )
|
|
|
1241 |
goto Syntax_Error;
|
|
|
1242 |
builder->parse_state = T1_Parse_Have_Moveto;
|
|
|
1243 |
}
|
|
|
1244 |
break;
|
|
|
1245 |
|
|
|
1246 |
case op_rrcurveto:
|
|
|
1247 |
FT_TRACE4(( " rrcurveto" ));
|
|
|
1248 |
|
|
|
1249 |
if ( ( error = t1_builder_start_point( builder, x, y ) )
|
|
|
1250 |
!= PSaux_Err_Ok ||
|
|
|
1251 |
( error = t1_builder_check_points( builder, 3 ) )
|
|
|
1252 |
!= PSaux_Err_Ok )
|
|
|
1253 |
goto Fail;
|
|
|
1254 |
|
|
|
1255 |
x += top[0];
|
|
|
1256 |
y += top[1];
|
|
|
1257 |
t1_builder_add_point( builder, x, y, 0 );
|
|
|
1258 |
|
|
|
1259 |
x += top[2];
|
|
|
1260 |
y += top[3];
|
|
|
1261 |
t1_builder_add_point( builder, x, y, 0 );
|
|
|
1262 |
|
|
|
1263 |
x += top[4];
|
|
|
1264 |
y += top[5];
|
|
|
1265 |
t1_builder_add_point( builder, x, y, 1 );
|
|
|
1266 |
break;
|
|
|
1267 |
|
|
|
1268 |
case op_vhcurveto:
|
|
|
1269 |
FT_TRACE4(( " vhcurveto" ));
|
|
|
1270 |
|
|
|
1271 |
if ( ( error = t1_builder_start_point( builder, x, y ) )
|
|
|
1272 |
!= PSaux_Err_Ok ||
|
|
|
1273 |
( error = t1_builder_check_points( builder, 3 ) )
|
|
|
1274 |
!= PSaux_Err_Ok )
|
|
|
1275 |
goto Fail;
|
|
|
1276 |
|
|
|
1277 |
y += top[0];
|
|
|
1278 |
t1_builder_add_point( builder, x, y, 0 );
|
|
|
1279 |
x += top[1];
|
|
|
1280 |
y += top[2];
|
|
|
1281 |
t1_builder_add_point( builder, x, y, 0 );
|
|
|
1282 |
x += top[3];
|
|
|
1283 |
t1_builder_add_point( builder, x, y, 1 );
|
|
|
1284 |
break;
|
|
|
1285 |
|
|
|
1286 |
case op_vlineto:
|
|
|
1287 |
FT_TRACE4(( " vlineto" ));
|
|
|
1288 |
|
|
|
1289 |
if ( ( error = t1_builder_start_point( builder, x, y ) )
|
|
|
1290 |
!= PSaux_Err_Ok )
|
|
|
1291 |
goto Fail;
|
|
|
1292 |
|
|
|
1293 |
y += top[0];
|
|
|
1294 |
goto Add_Line;
|
|
|
1295 |
|
|
|
1296 |
case op_vmoveto:
|
|
|
1297 |
FT_TRACE4(( " vmoveto" ));
|
|
|
1298 |
|
|
|
1299 |
y += top[0];
|
|
|
1300 |
if ( !decoder->flex_state )
|
|
|
1301 |
{
|
|
|
1302 |
if ( builder->parse_state == T1_Parse_Start )
|
|
|
1303 |
goto Syntax_Error;
|
|
|
1304 |
builder->parse_state = T1_Parse_Have_Moveto;
|
|
|
1305 |
}
|
|
|
1306 |
break;
|
|
|
1307 |
|
|
|
1308 |
case op_div:
|
|
|
1309 |
FT_TRACE4(( " div" ));
|
|
|
1310 |
|
|
|
1311 |
/* if `large_int' is set, we divide unscaled numbers; */
|
|
|
1312 |
/* otherwise, we divide numbers in 16.16 format -- */
|
|
|
1313 |
/* in both cases, it is the same operation */
|
|
|
1314 |
*top = FT_DivFix( top[0], top[1] );
|
|
|
1315 |
++top;
|
|
|
1316 |
|
|
|
1317 |
large_int = FALSE;
|
|
|
1318 |
break;
|
|
|
1319 |
|
|
|
1320 |
case op_callsubr:
|
|
|
1321 |
{
|
|
|
1322 |
FT_Int idx;
|
|
|
1323 |
|
|
|
1324 |
|
|
|
1325 |
FT_TRACE4(( " callsubr" ));
|
|
|
1326 |
|
|
|
1327 |
idx = (FT_Int)( top[0] >> 16 );
|
|
|
1328 |
if ( idx < 0 || idx >= (FT_Int)decoder->num_subrs )
|
|
|
1329 |
{
|
|
|
1330 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
1331 |
" invalid subrs index\n" ));
|
|
|
1332 |
goto Syntax_Error;
|
|
|
1333 |
}
|
|
|
1334 |
|
|
|
1335 |
if ( zone - decoder->zones >= T1_MAX_SUBRS_CALLS )
|
|
|
1336 |
{
|
|
|
1337 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
1338 |
" too many nested subrs\n" ));
|
|
|
1339 |
goto Syntax_Error;
|
|
|
1340 |
}
|
|
|
1341 |
|
|
|
1342 |
zone->cursor = ip; /* save current instruction pointer */
|
|
|
1343 |
|
|
|
1344 |
zone++;
|
|
|
1345 |
|
|
|
1346 |
/* The Type 1 driver stores subroutines without the seed bytes. */
|
|
|
1347 |
/* The CID driver stores subroutines with seed bytes. This */
|
|
|
1348 |
/* case is taken care of when decoder->subrs_len == 0. */
|
|
|
1349 |
zone->base = decoder->subrs[idx];
|
|
|
1350 |
|
|
|
1351 |
if ( decoder->subrs_len )
|
|
|
1352 |
zone->limit = zone->base + decoder->subrs_len[idx];
|
|
|
1353 |
else
|
|
|
1354 |
{
|
|
|
1355 |
/* We are using subroutines from a CID font. We must adjust */
|
|
|
1356 |
/* for the seed bytes. */
|
|
|
1357 |
zone->base += ( decoder->lenIV >= 0 ? decoder->lenIV : 0 );
|
|
|
1358 |
zone->limit = decoder->subrs[idx + 1];
|
|
|
1359 |
}
|
|
|
1360 |
|
|
|
1361 |
zone->cursor = zone->base;
|
|
|
1362 |
|
|
|
1363 |
if ( !zone->base )
|
|
|
1364 |
{
|
|
|
1365 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
1366 |
" invoking empty subrs\n" ));
|
|
|
1367 |
goto Syntax_Error;
|
|
|
1368 |
}
|
|
|
1369 |
|
|
|
1370 |
decoder->zone = zone;
|
|
|
1371 |
ip = zone->base;
|
|
|
1372 |
limit = zone->limit;
|
|
|
1373 |
break;
|
|
|
1374 |
}
|
|
|
1375 |
|
|
|
1376 |
case op_pop:
|
|
|
1377 |
FT_TRACE4(( " pop" ));
|
|
|
1378 |
|
|
|
1379 |
if ( known_othersubr_result_cnt > 0 )
|
|
|
1380 |
{
|
|
|
1381 |
known_othersubr_result_cnt--;
|
|
|
1382 |
/* ignore, we pushed the operands ourselves */
|
|
|
1383 |
break;
|
|
|
1384 |
}
|
|
|
1385 |
|
|
|
1386 |
if ( unknown_othersubr_result_cnt == 0 )
|
|
|
1387 |
{
|
|
|
1388 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
1389 |
" no more operands for othersubr\n" ));
|
|
|
1390 |
goto Syntax_Error;
|
|
|
1391 |
}
|
|
|
1392 |
|
|
|
1393 |
unknown_othersubr_result_cnt--;
|
|
|
1394 |
top++; /* `push' the operand to callothersubr onto the stack */
|
|
|
1395 |
break;
|
|
|
1396 |
|
|
|
1397 |
case op_return:
|
|
|
1398 |
FT_TRACE4(( " return" ));
|
|
|
1399 |
|
|
|
1400 |
if ( zone <= decoder->zones )
|
|
|
1401 |
{
|
|
|
1402 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
1403 |
" unexpected return\n" ));
|
|
|
1404 |
goto Syntax_Error;
|
|
|
1405 |
}
|
|
|
1406 |
|
|
|
1407 |
zone--;
|
|
|
1408 |
ip = zone->cursor;
|
|
|
1409 |
limit = zone->limit;
|
|
|
1410 |
decoder->zone = zone;
|
|
|
1411 |
break;
|
|
|
1412 |
|
|
|
1413 |
case op_dotsection:
|
|
|
1414 |
FT_TRACE4(( " dotsection" ));
|
|
|
1415 |
|
|
|
1416 |
break;
|
|
|
1417 |
|
|
|
1418 |
case op_hstem:
|
|
|
1419 |
FT_TRACE4(( " hstem" ));
|
|
|
1420 |
|
|
|
1421 |
/* record horizontal hint */
|
|
|
1422 |
if ( hinter )
|
|
|
1423 |
{
|
|
|
1424 |
/* top[0] += builder->left_bearing.y; */
|
|
|
1425 |
hinter->stem( hinter->hints, 1, top );
|
|
|
1426 |
}
|
|
|
1427 |
break;
|
|
|
1428 |
|
|
|
1429 |
case op_hstem3:
|
|
|
1430 |
FT_TRACE4(( " hstem3" ));
|
|
|
1431 |
|
|
|
1432 |
/* record horizontal counter-controlled hints */
|
|
|
1433 |
if ( hinter )
|
|
|
1434 |
hinter->stem3( hinter->hints, 1, top );
|
|
|
1435 |
break;
|
|
|
1436 |
|
|
|
1437 |
case op_vstem:
|
|
|
1438 |
FT_TRACE4(( " vstem" ));
|
|
|
1439 |
|
|
|
1440 |
/* record vertical hint */
|
|
|
1441 |
if ( hinter )
|
|
|
1442 |
{
|
|
|
1443 |
top[0] += orig_x;
|
|
|
1444 |
hinter->stem( hinter->hints, 0, top );
|
|
|
1445 |
}
|
|
|
1446 |
break;
|
|
|
1447 |
|
|
|
1448 |
case op_vstem3:
|
|
|
1449 |
FT_TRACE4(( " vstem3" ));
|
|
|
1450 |
|
|
|
1451 |
/* record vertical counter-controlled hints */
|
|
|
1452 |
if ( hinter )
|
|
|
1453 |
{
|
|
|
1454 |
FT_Pos dx = orig_x;
|
|
|
1455 |
|
|
|
1456 |
|
|
|
1457 |
top[0] += dx;
|
|
|
1458 |
top[2] += dx;
|
|
|
1459 |
top[4] += dx;
|
|
|
1460 |
hinter->stem3( hinter->hints, 0, top );
|
|
|
1461 |
}
|
|
|
1462 |
break;
|
|
|
1463 |
|
|
|
1464 |
case op_setcurrentpoint:
|
|
|
1465 |
FT_TRACE4(( " setcurrentpoint" ));
|
|
|
1466 |
|
|
|
1467 |
/* From the T1 specification, section 6.4: */
|
|
|
1468 |
/* */
|
|
|
1469 |
/* The setcurrentpoint command is used only in */
|
|
|
1470 |
/* conjunction with results from OtherSubrs procedures. */
|
|
|
1471 |
|
|
|
1472 |
/* known_othersubr_result_cnt != 0 is already handled */
|
|
|
1473 |
/* above. */
|
|
|
1474 |
|
|
|
1475 |
/* Note, however, that both Ghostscript and Adobe */
|
|
|
1476 |
/* Distiller handle this situation by silently ignoring */
|
|
|
1477 |
/* the inappropriate `setcurrentpoint' instruction. So */
|
|
|
1478 |
/* we do the same. */
|
|
|
1479 |
#if 0
|
|
|
1480 |
|
|
|
1481 |
if ( decoder->flex_state != 1 )
|
|
|
1482 |
{
|
|
|
1483 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
1484 |
" unexpected `setcurrentpoint'\n" ));
|
|
|
1485 |
goto Syntax_Error;
|
|
|
1486 |
}
|
|
|
1487 |
else
|
|
|
1488 |
...
|
|
|
1489 |
#endif
|
|
|
1490 |
|
|
|
1491 |
x = top[0];
|
|
|
1492 |
y = top[1];
|
|
|
1493 |
decoder->flex_state = 0;
|
|
|
1494 |
break;
|
|
|
1495 |
|
|
|
1496 |
case op_unknown15:
|
|
|
1497 |
FT_TRACE4(( " opcode_15" ));
|
|
|
1498 |
/* nothing to do except to pop the two arguments */
|
|
|
1499 |
break;
|
|
|
1500 |
|
|
|
1501 |
default:
|
|
|
1502 |
FT_ERROR(( "t1_decoder_parse_charstrings:"
|
|
|
1503 |
" unhandled opcode %d\n", op ));
|
|
|
1504 |
goto Syntax_Error;
|
|
|
1505 |
}
|
|
|
1506 |
|
|
|
1507 |
/* XXX Operators usually clear the operand stack; */
|
|
|
1508 |
/* only div, callsubr, callothersubr, pop, and */
|
|
|
1509 |
/* return are different. */
|
|
|
1510 |
/* In practice it doesn't matter (?). */
|
|
|
1511 |
|
|
|
1512 |
decoder->top = top;
|
|
|
1513 |
|
|
|
1514 |
#ifdef FT_DEBUG_LEVEL_TRACE
|
|
|
1515 |
FT_TRACE4(( "\n" ));
|
|
|
1516 |
bol = TRUE;
|
|
|
1517 |
#endif
|
|
|
1518 |
|
|
|
1519 |
} /* general operator processing */
|
|
|
1520 |
|
|
|
1521 |
} /* while ip < limit */
|
|
|
1522 |
|
|
|
1523 |
FT_TRACE4(( "..end..\n\n" ));
|
|
|
1524 |
|
|
|
1525 |
Fail:
|
|
|
1526 |
return error;
|
|
|
1527 |
|
|
|
1528 |
Syntax_Error:
|
|
|
1529 |
return PSaux_Err_Syntax_Error;
|
|
|
1530 |
|
|
|
1531 |
Stack_Underflow:
|
|
|
1532 |
return PSaux_Err_Stack_Underflow;
|
|
|
1533 |
}
|
|
|
1534 |
|
|
|
1535 |
|
|
|
1536 |
/* parse a single Type 1 glyph */
|
|
|
1537 |
FT_LOCAL_DEF( FT_Error )
|
|
|
1538 |
t1_decoder_parse_glyph( T1_Decoder decoder,
|
|
|
1539 |
FT_UInt glyph )
|
|
|
1540 |
{
|
|
|
1541 |
return decoder->parse_callback( decoder, glyph );
|
|
|
1542 |
}
|
|
|
1543 |
|
|
|
1544 |
|
|
|
1545 |
/* initialize T1 decoder */
|
|
|
1546 |
FT_LOCAL_DEF( FT_Error )
|
|
|
1547 |
t1_decoder_init( T1_Decoder decoder,
|
|
|
1548 |
FT_Face face,
|
|
|
1549 |
FT_Size size,
|
|
|
1550 |
FT_GlyphSlot slot,
|
|
|
1551 |
FT_Byte** glyph_names,
|
|
|
1552 |
PS_Blend blend,
|
|
|
1553 |
FT_Bool hinting,
|
|
|
1554 |
FT_Render_Mode hint_mode,
|
|
|
1555 |
T1_Decoder_Callback parse_callback )
|
|
|
1556 |
{
|
|
|
1557 |
FT_MEM_ZERO( decoder, sizeof ( *decoder ) );
|
|
|
1558 |
|
|
|
1559 |
/* retrieve PSNames interface from list of current modules */
|
|
|
1560 |
{
|
|
|
1561 |
FT_Service_PsCMaps psnames = 0;
|
|
|
1562 |
|
|
|
1563 |
|
|
|
1564 |
FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
|
|
|
1565 |
if ( !psnames )
|
|
|
1566 |
{
|
|
|
1567 |
FT_ERROR(( "t1_decoder_init:"
|
|
|
1568 |
" the `psnames' module is not available\n" ));
|
|
|
1569 |
return PSaux_Err_Unimplemented_Feature;
|
|
|
1570 |
}
|
|
|
1571 |
|
|
|
1572 |
decoder->psnames = psnames;
|
|
|
1573 |
}
|
|
|
1574 |
|
|
|
1575 |
t1_builder_init( &decoder->builder, face, size, slot, hinting );
|
|
|
1576 |
|
|
|
1577 |
/* decoder->buildchar and decoder->len_buildchar have to be */
|
|
|
1578 |
/* initialized by the caller since we cannot know the length */
|
|
|
1579 |
/* of the BuildCharArray */
|
|
|
1580 |
|
|
|
1581 |
decoder->num_glyphs = (FT_UInt)face->num_glyphs;
|
|
|
1582 |
decoder->glyph_names = glyph_names;
|
|
|
1583 |
decoder->hint_mode = hint_mode;
|
|
|
1584 |
decoder->blend = blend;
|
|
|
1585 |
decoder->parse_callback = parse_callback;
|
|
|
1586 |
|
|
|
1587 |
decoder->funcs = t1_decoder_funcs;
|
|
|
1588 |
|
|
|
1589 |
return PSaux_Err_Ok;
|
|
|
1590 |
}
|
|
|
1591 |
|
|
|
1592 |
|
|
|
1593 |
/* finalize T1 decoder */
|
|
|
1594 |
FT_LOCAL_DEF( void )
|
|
|
1595 |
t1_decoder_done( T1_Decoder decoder )
|
|
|
1596 |
{
|
|
|
1597 |
t1_builder_done( &decoder->builder );
|
|
|
1598 |
}
|
|
|
1599 |
|
|
|
1600 |
|
|
|
1601 |
/* END */
|