| Index: third_party/freetype2/src/src/psaux/t1decode.c
|
| diff --git a/third_party/freetype2/src/src/psaux/t1decode.c b/third_party/freetype2/src/src/psaux/t1decode.c
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..5811fcb49cb0b2c2909962bc0c4c257fbd6c529b
|
| --- /dev/null
|
| +++ b/third_party/freetype2/src/src/psaux/t1decode.c
|
| @@ -0,0 +1,1624 @@
|
| +/***************************************************************************/
|
| +/* */
|
| +/* t1decode.c */
|
| +/* */
|
| +/* PostScript Type 1 decoding routines (body). */
|
| +/* */
|
| +/* Copyright 2000-2015 by */
|
| +/* David Turner, Robert Wilhelm, and Werner Lemberg. */
|
| +/* */
|
| +/* This file is part of the FreeType project, and may only be used, */
|
| +/* modified, and distributed under the terms of the FreeType project */
|
| +/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
|
| +/* this file you indicate that you have read the license and */
|
| +/* understand and accept it fully. */
|
| +/* */
|
| +/***************************************************************************/
|
| +
|
| +
|
| +#include <ft2build.h>
|
| +#include FT_INTERNAL_CALC_H
|
| +#include FT_INTERNAL_DEBUG_H
|
| +#include FT_INTERNAL_POSTSCRIPT_HINTS_H
|
| +#include FT_OUTLINE_H
|
| +
|
| +#include "t1decode.h"
|
| +#include "psobjs.h"
|
| +
|
| +#include "psauxerr.h"
|
| +
|
| +/* ensure proper sign extension */
|
| +#define Fix2Int( f ) ( (FT_Int)(FT_Short)( (f) >> 16 ) )
|
| +
|
| + /*************************************************************************/
|
| + /* */
|
| + /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
|
| + /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
|
| + /* messages during execution. */
|
| + /* */
|
| +#undef FT_COMPONENT
|
| +#define FT_COMPONENT trace_t1decode
|
| +
|
| +
|
| + typedef enum T1_Operator_
|
| + {
|
| + op_none = 0,
|
| + op_endchar,
|
| + op_hsbw,
|
| + op_seac,
|
| + op_sbw,
|
| + op_closepath,
|
| + op_hlineto,
|
| + op_hmoveto,
|
| + op_hvcurveto,
|
| + op_rlineto,
|
| + op_rmoveto,
|
| + op_rrcurveto,
|
| + op_vhcurveto,
|
| + op_vlineto,
|
| + op_vmoveto,
|
| + op_dotsection,
|
| + op_hstem,
|
| + op_hstem3,
|
| + op_vstem,
|
| + op_vstem3,
|
| + op_div,
|
| + op_callothersubr,
|
| + op_callsubr,
|
| + op_pop,
|
| + op_return,
|
| + op_setcurrentpoint,
|
| + op_unknown15,
|
| +
|
| + op_max /* never remove this one */
|
| +
|
| + } T1_Operator;
|
| +
|
| +
|
| + static
|
| + const FT_Int t1_args_count[op_max] =
|
| + {
|
| + 0, /* none */
|
| + 0, /* endchar */
|
| + 2, /* hsbw */
|
| + 5, /* seac */
|
| + 4, /* sbw */
|
| + 0, /* closepath */
|
| + 1, /* hlineto */
|
| + 1, /* hmoveto */
|
| + 4, /* hvcurveto */
|
| + 2, /* rlineto */
|
| + 2, /* rmoveto */
|
| + 6, /* rrcurveto */
|
| + 4, /* vhcurveto */
|
| + 1, /* vlineto */
|
| + 1, /* vmoveto */
|
| + 0, /* dotsection */
|
| + 2, /* hstem */
|
| + 6, /* hstem3 */
|
| + 2, /* vstem */
|
| + 6, /* vstem3 */
|
| + 2, /* div */
|
| + -1, /* callothersubr */
|
| + 1, /* callsubr */
|
| + 0, /* pop */
|
| + 0, /* return */
|
| + 2, /* setcurrentpoint */
|
| + 2 /* opcode 15 (undocumented and obsolete) */
|
| + };
|
| +
|
| +
|
| + /*************************************************************************/
|
| + /* */
|
| + /* <Function> */
|
| + /* t1_lookup_glyph_by_stdcharcode */
|
| + /* */
|
| + /* <Description> */
|
| + /* Looks up a given glyph by its StandardEncoding charcode. Used to */
|
| + /* implement the SEAC Type 1 operator. */
|
| + /* */
|
| + /* <Input> */
|
| + /* face :: The current face object. */
|
| + /* */
|
| + /* charcode :: The character code to look for. */
|
| + /* */
|
| + /* <Return> */
|
| + /* A glyph index in the font face. Returns -1 if the corresponding */
|
| + /* glyph wasn't found. */
|
| + /* */
|
| + static FT_Int
|
| + t1_lookup_glyph_by_stdcharcode( T1_Decoder decoder,
|
| + FT_Int charcode )
|
| + {
|
| + FT_UInt n;
|
| + const FT_String* glyph_name;
|
| + FT_Service_PsCMaps psnames = decoder->psnames;
|
| +
|
| +
|
| + /* check range of standard char code */
|
| + if ( charcode < 0 || charcode > 255 )
|
| + return -1;
|
| +
|
| + glyph_name = psnames->adobe_std_strings(
|
| + psnames->adobe_std_encoding[charcode]);
|
| +
|
| + for ( n = 0; n < decoder->num_glyphs; n++ )
|
| + {
|
| + FT_String* name = (FT_String*)decoder->glyph_names[n];
|
| +
|
| +
|
| + if ( name &&
|
| + name[0] == glyph_name[0] &&
|
| + ft_strcmp( name, glyph_name ) == 0 )
|
| + return (FT_Int)n;
|
| + }
|
| +
|
| + return -1;
|
| + }
|
| +
|
| +
|
| + /*************************************************************************/
|
| + /* */
|
| + /* <Function> */
|
| + /* t1operator_seac */
|
| + /* */
|
| + /* <Description> */
|
| + /* Implements the `seac' Type 1 operator for a Type 1 decoder. */
|
| + /* */
|
| + /* <Input> */
|
| + /* decoder :: The current CID decoder. */
|
| + /* */
|
| + /* asb :: The accent's side bearing. */
|
| + /* */
|
| + /* adx :: The horizontal offset of the accent. */
|
| + /* */
|
| + /* ady :: The vertical offset of the accent. */
|
| + /* */
|
| + /* bchar :: The base character's StandardEncoding charcode. */
|
| + /* */
|
| + /* achar :: The accent character's StandardEncoding charcode. */
|
| + /* */
|
| + /* <Return> */
|
| + /* FreeType error code. 0 means success. */
|
| + /* */
|
| + static FT_Error
|
| + t1operator_seac( T1_Decoder decoder,
|
| + FT_Pos asb,
|
| + FT_Pos adx,
|
| + FT_Pos ady,
|
| + FT_Int bchar,
|
| + FT_Int achar )
|
| + {
|
| + FT_Error error;
|
| + FT_Int bchar_index, achar_index;
|
| +#if 0
|
| + FT_Int n_base_points;
|
| + FT_Outline* base = decoder->builder.base;
|
| +#endif
|
| + FT_Vector left_bearing, advance;
|
| +
|
| +#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
| + T1_Face face = (T1_Face)decoder->builder.face;
|
| +#endif
|
| +
|
| +
|
| + if ( decoder->seac )
|
| + {
|
| + FT_ERROR(( "t1operator_seac: invalid nested seac\n" ));
|
| + return FT_THROW( Syntax_Error );
|
| + }
|
| +
|
| + if ( decoder->builder.metrics_only )
|
| + {
|
| + FT_ERROR(( "t1operator_seac: unexpected seac\n" ));
|
| + return FT_THROW( Syntax_Error );
|
| + }
|
| +
|
| + /* seac weirdness */
|
| + adx += decoder->builder.left_bearing.x;
|
| +
|
| + /* `glyph_names' is set to 0 for CID fonts which do not */
|
| + /* include an encoding. How can we deal with these? */
|
| +#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
| + if ( decoder->glyph_names == 0 &&
|
| + !face->root.internal->incremental_interface )
|
| +#else
|
| + if ( decoder->glyph_names == 0 )
|
| +#endif /* FT_CONFIG_OPTION_INCREMENTAL */
|
| + {
|
| + FT_ERROR(( "t1operator_seac:"
|
| + " glyph names table not available in this font\n" ));
|
| + return FT_THROW( Syntax_Error );
|
| + }
|
| +
|
| +#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
| + if ( face->root.internal->incremental_interface )
|
| + {
|
| + /* the caller must handle the font encoding also */
|
| + bchar_index = bchar;
|
| + achar_index = achar;
|
| + }
|
| + else
|
| +#endif
|
| + {
|
| + bchar_index = t1_lookup_glyph_by_stdcharcode( decoder, bchar );
|
| + achar_index = t1_lookup_glyph_by_stdcharcode( decoder, achar );
|
| + }
|
| +
|
| + if ( bchar_index < 0 || achar_index < 0 )
|
| + {
|
| + FT_ERROR(( "t1operator_seac:"
|
| + " invalid seac character code arguments\n" ));
|
| + return FT_THROW( Syntax_Error );
|
| + }
|
| +
|
| + /* if we are trying to load a composite glyph, do not load the */
|
| + /* accent character and return the array of subglyphs. */
|
| + if ( decoder->builder.no_recurse )
|
| + {
|
| + FT_GlyphSlot glyph = (FT_GlyphSlot)decoder->builder.glyph;
|
| + FT_GlyphLoader loader = glyph->internal->loader;
|
| + FT_SubGlyph subg;
|
| +
|
| +
|
| + /* reallocate subglyph array if necessary */
|
| + error = FT_GlyphLoader_CheckSubGlyphs( loader, 2 );
|
| + if ( error )
|
| + goto Exit;
|
| +
|
| + subg = loader->current.subglyphs;
|
| +
|
| + /* subglyph 0 = base character */
|
| + subg->index = bchar_index;
|
| + subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES |
|
| + FT_SUBGLYPH_FLAG_USE_MY_METRICS;
|
| + subg->arg1 = 0;
|
| + subg->arg2 = 0;
|
| + subg++;
|
| +
|
| + /* subglyph 1 = accent character */
|
| + subg->index = achar_index;
|
| + subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES;
|
| + subg->arg1 = (FT_Int)FIXED_TO_INT( adx - asb );
|
| + subg->arg2 = (FT_Int)FIXED_TO_INT( ady );
|
| +
|
| + /* set up remaining glyph fields */
|
| + glyph->num_subglyphs = 2;
|
| + glyph->subglyphs = loader->base.subglyphs;
|
| + glyph->format = FT_GLYPH_FORMAT_COMPOSITE;
|
| +
|
| + loader->current.num_subglyphs = 2;
|
| + goto Exit;
|
| + }
|
| +
|
| + /* First load `bchar' in builder */
|
| + /* now load the unscaled outline */
|
| +
|
| + FT_GlyphLoader_Prepare( decoder->builder.loader ); /* prepare loader */
|
| +
|
| + /* the seac operator must not be nested */
|
| + decoder->seac = TRUE;
|
| + error = t1_decoder_parse_glyph( decoder, (FT_UInt)bchar_index );
|
| + decoder->seac = FALSE;
|
| + if ( error )
|
| + goto Exit;
|
| +
|
| + /* save the left bearing and width of the base character */
|
| + /* as they will be erased by the next load. */
|
| +
|
| + left_bearing = decoder->builder.left_bearing;
|
| + advance = decoder->builder.advance;
|
| +
|
| + decoder->builder.left_bearing.x = 0;
|
| + decoder->builder.left_bearing.y = 0;
|
| +
|
| + decoder->builder.pos_x = adx - asb;
|
| + decoder->builder.pos_y = ady;
|
| +
|
| + /* Now load `achar' on top of */
|
| + /* the base outline */
|
| +
|
| + /* the seac operator must not be nested */
|
| + decoder->seac = TRUE;
|
| + error = t1_decoder_parse_glyph( decoder, (FT_UInt)achar_index );
|
| + decoder->seac = FALSE;
|
| + if ( error )
|
| + goto Exit;
|
| +
|
| + /* restore the left side bearing and */
|
| + /* advance width of the base character */
|
| +
|
| + decoder->builder.left_bearing = left_bearing;
|
| + decoder->builder.advance = advance;
|
| +
|
| + decoder->builder.pos_x = 0;
|
| + decoder->builder.pos_y = 0;
|
| +
|
| + Exit:
|
| + return error;
|
| + }
|
| +
|
| +
|
| + /*************************************************************************/
|
| + /* */
|
| + /* <Function> */
|
| + /* t1_decoder_parse_charstrings */
|
| + /* */
|
| + /* <Description> */
|
| + /* Parses a given Type 1 charstrings program. */
|
| + /* */
|
| + /* <Input> */
|
| + /* decoder :: The current Type 1 decoder. */
|
| + /* */
|
| + /* charstring_base :: The base address of the charstring stream. */
|
| + /* */
|
| + /* charstring_len :: The length in bytes of the charstring stream. */
|
| + /* */
|
| + /* <Return> */
|
| + /* FreeType error code. 0 means success. */
|
| + /* */
|
| + FT_LOCAL_DEF( FT_Error )
|
| + t1_decoder_parse_charstrings( T1_Decoder decoder,
|
| + FT_Byte* charstring_base,
|
| + FT_UInt charstring_len )
|
| + {
|
| + FT_Error error;
|
| + T1_Decoder_Zone zone;
|
| + FT_Byte* ip;
|
| + FT_Byte* limit;
|
| + T1_Builder builder = &decoder->builder;
|
| + FT_Pos x, y, orig_x, orig_y;
|
| + FT_Int known_othersubr_result_cnt = 0;
|
| + FT_Int unknown_othersubr_result_cnt = 0;
|
| + FT_Bool large_int;
|
| + FT_Fixed seed;
|
| +
|
| + T1_Hints_Funcs hinter;
|
| +
|
| +#ifdef FT_DEBUG_LEVEL_TRACE
|
| + FT_Bool bol = TRUE;
|
| +#endif
|
| +
|
| +
|
| + /* compute random seed from stack address of parameter */
|
| + seed = (FT_Fixed)( ( (FT_Offset)(char*)&seed ^
|
| + (FT_Offset)(char*)&decoder ^
|
| + (FT_Offset)(char*)&charstring_base ) &
|
| + FT_ULONG_MAX );
|
| + seed = ( seed ^ ( seed >> 10 ) ^ ( seed >> 20 ) ) & 0xFFFFL;
|
| + if ( seed == 0 )
|
| + seed = 0x7384;
|
| +
|
| + /* First of all, initialize the decoder */
|
| + decoder->top = decoder->stack;
|
| + decoder->zone = decoder->zones;
|
| + zone = decoder->zones;
|
| +
|
| + builder->parse_state = T1_Parse_Start;
|
| +
|
| + hinter = (T1_Hints_Funcs)builder->hints_funcs;
|
| +
|
| + /* a font that reads BuildCharArray without setting */
|
| + /* its values first is buggy, but ... */
|
| + FT_ASSERT( ( decoder->len_buildchar == 0 ) ==
|
| + ( decoder->buildchar == NULL ) );
|
| +
|
| + if ( decoder->buildchar && decoder->len_buildchar > 0 )
|
| + ft_memset( &decoder->buildchar[0],
|
| + 0,
|
| + sizeof ( decoder->buildchar[0] ) * decoder->len_buildchar );
|
| +
|
| + FT_TRACE4(( "\n"
|
| + "Start charstring\n" ));
|
| +
|
| + zone->base = charstring_base;
|
| + limit = zone->limit = charstring_base + charstring_len;
|
| + ip = zone->cursor = zone->base;
|
| +
|
| + error = FT_Err_Ok;
|
| +
|
| + x = orig_x = builder->pos_x;
|
| + y = orig_y = builder->pos_y;
|
| +
|
| + /* begin hints recording session, if any */
|
| + if ( hinter )
|
| + hinter->open( hinter->hints );
|
| +
|
| + large_int = FALSE;
|
| +
|
| + /* now, execute loop */
|
| + while ( ip < limit )
|
| + {
|
| + FT_Long* top = decoder->top;
|
| + T1_Operator op = op_none;
|
| + FT_Int32 value = 0;
|
| +
|
| +
|
| + FT_ASSERT( known_othersubr_result_cnt == 0 ||
|
| + unknown_othersubr_result_cnt == 0 );
|
| +
|
| +#ifdef FT_DEBUG_LEVEL_TRACE
|
| + if ( bol )
|
| + {
|
| + FT_TRACE5(( " (%d)", decoder->top - decoder->stack ));
|
| + bol = FALSE;
|
| + }
|
| +#endif
|
| +
|
| + /*********************************************************************/
|
| + /* */
|
| + /* Decode operator or operand */
|
| + /* */
|
| + /* */
|
| +
|
| + /* first of all, decompress operator or value */
|
| + switch ( *ip++ )
|
| + {
|
| + case 1:
|
| + op = op_hstem;
|
| + break;
|
| +
|
| + case 3:
|
| + op = op_vstem;
|
| + break;
|
| + case 4:
|
| + op = op_vmoveto;
|
| + break;
|
| + case 5:
|
| + op = op_rlineto;
|
| + break;
|
| + case 6:
|
| + op = op_hlineto;
|
| + break;
|
| + case 7:
|
| + op = op_vlineto;
|
| + break;
|
| + case 8:
|
| + op = op_rrcurveto;
|
| + break;
|
| + case 9:
|
| + op = op_closepath;
|
| + break;
|
| + case 10:
|
| + op = op_callsubr;
|
| + break;
|
| + case 11:
|
| + op = op_return;
|
| + break;
|
| +
|
| + case 13:
|
| + op = op_hsbw;
|
| + break;
|
| + case 14:
|
| + op = op_endchar;
|
| + break;
|
| +
|
| + case 15: /* undocumented, obsolete operator */
|
| + op = op_unknown15;
|
| + break;
|
| +
|
| + case 21:
|
| + op = op_rmoveto;
|
| + break;
|
| + case 22:
|
| + op = op_hmoveto;
|
| + break;
|
| +
|
| + case 30:
|
| + op = op_vhcurveto;
|
| + break;
|
| + case 31:
|
| + op = op_hvcurveto;
|
| + break;
|
| +
|
| + case 12:
|
| + if ( ip >= limit )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " invalid escape (12+EOF)\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + switch ( *ip++ )
|
| + {
|
| + case 0:
|
| + op = op_dotsection;
|
| + break;
|
| + case 1:
|
| + op = op_vstem3;
|
| + break;
|
| + case 2:
|
| + op = op_hstem3;
|
| + break;
|
| + case 6:
|
| + op = op_seac;
|
| + break;
|
| + case 7:
|
| + op = op_sbw;
|
| + break;
|
| + case 12:
|
| + op = op_div;
|
| + break;
|
| + case 16:
|
| + op = op_callothersubr;
|
| + break;
|
| + case 17:
|
| + op = op_pop;
|
| + break;
|
| + case 33:
|
| + op = op_setcurrentpoint;
|
| + break;
|
| +
|
| + default:
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " invalid escape (12+%d)\n",
|
| + ip[-1] ));
|
| + goto Syntax_Error;
|
| + }
|
| + break;
|
| +
|
| + case 255: /* four bytes integer */
|
| + if ( ip + 4 > limit )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " unexpected EOF in integer\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + value = (FT_Int32)( ( (FT_UInt32)ip[0] << 24 ) |
|
| + ( (FT_UInt32)ip[1] << 16 ) |
|
| + ( (FT_UInt32)ip[2] << 8 ) |
|
| + (FT_UInt32)ip[3] );
|
| + ip += 4;
|
| +
|
| + /* According to the specification, values > 32000 or < -32000 must */
|
| + /* be followed by a `div' operator to make the result be in the */
|
| + /* range [-32000;32000]. We expect that the second argument of */
|
| + /* `div' is not a large number. Additionally, we don't handle */
|
| + /* stuff like `<large1> <large2> <num> div <num> div' or */
|
| + /* <large1> <large2> <num> div div'. This is probably not allowed */
|
| + /* anyway. */
|
| + if ( value > 32000 || value < -32000 )
|
| + {
|
| + if ( large_int )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " no `div' after large integer\n" ));
|
| + }
|
| + else
|
| + large_int = TRUE;
|
| + }
|
| + else
|
| + {
|
| + if ( !large_int )
|
| + value = (FT_Int32)( (FT_UInt32)value << 16 );
|
| + }
|
| +
|
| + break;
|
| +
|
| + default:
|
| + if ( ip[-1] >= 32 )
|
| + {
|
| + if ( ip[-1] < 247 )
|
| + value = (FT_Int32)ip[-1] - 139;
|
| + else
|
| + {
|
| + if ( ++ip > limit )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " unexpected EOF in integer\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + if ( ip[-2] < 251 )
|
| + value = ( ( ip[-2] - 247 ) * 256 ) + ip[-1] + 108;
|
| + else
|
| + value = -( ( ( ip[-2] - 251 ) * 256 ) + ip[-1] + 108 );
|
| + }
|
| +
|
| + if ( !large_int )
|
| + value = (FT_Int32)( (FT_UInt32)value << 16 );
|
| + }
|
| + else
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " invalid byte (%d)\n", ip[-1] ));
|
| + goto Syntax_Error;
|
| + }
|
| + }
|
| +
|
| + if ( unknown_othersubr_result_cnt > 0 )
|
| + {
|
| + switch ( op )
|
| + {
|
| + case op_callsubr:
|
| + case op_return:
|
| + case op_none:
|
| + case op_pop:
|
| + break;
|
| +
|
| + default:
|
| + /* all operands have been transferred by previous pops */
|
| + unknown_othersubr_result_cnt = 0;
|
| + break;
|
| + }
|
| + }
|
| +
|
| + if ( large_int && !( op == op_none || op == op_div ) )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " no `div' after large integer\n" ));
|
| +
|
| + large_int = FALSE;
|
| + }
|
| +
|
| + /*********************************************************************/
|
| + /* */
|
| + /* Push value on stack, or process operator */
|
| + /* */
|
| + /* */
|
| + if ( op == op_none )
|
| + {
|
| + if ( top - decoder->stack >= T1_MAX_CHARSTRINGS_OPERANDS )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings: stack overflow\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| +#ifdef FT_DEBUG_LEVEL_TRACE
|
| + if ( large_int )
|
| + FT_TRACE4(( " %ld", value ));
|
| + else
|
| + FT_TRACE4(( " %ld", value / 65536 ));
|
| +#endif
|
| +
|
| + *top++ = value;
|
| + decoder->top = top;
|
| + }
|
| + else if ( op == op_callothersubr ) /* callothersubr */
|
| + {
|
| + FT_Int subr_no;
|
| + FT_Int arg_cnt;
|
| +
|
| +
|
| +#ifdef FT_DEBUG_LEVEL_TRACE
|
| + FT_TRACE4(( " callothersubr\n" ));
|
| + bol = TRUE;
|
| +#endif
|
| +
|
| + if ( top - decoder->stack < 2 )
|
| + goto Stack_Underflow;
|
| +
|
| + top -= 2;
|
| +
|
| + subr_no = Fix2Int( top[1] );
|
| + arg_cnt = Fix2Int( top[0] );
|
| +
|
| + /***********************************************************/
|
| + /* */
|
| + /* remove all operands to callothersubr from the stack */
|
| + /* */
|
| + /* for handled othersubrs, where we know the number of */
|
| + /* arguments, we increase the stack by the value of */
|
| + /* known_othersubr_result_cnt */
|
| + /* */
|
| + /* for unhandled othersubrs the following pops adjust the */
|
| + /* stack pointer as necessary */
|
| +
|
| + if ( arg_cnt > top - decoder->stack )
|
| + goto Stack_Underflow;
|
| +
|
| + top -= arg_cnt;
|
| +
|
| + known_othersubr_result_cnt = 0;
|
| + unknown_othersubr_result_cnt = 0;
|
| +
|
| + /* XXX TODO: The checks to `arg_count == <whatever>' */
|
| + /* might not be correct; an othersubr expects a certain */
|
| + /* number of operands on the PostScript stack (as opposed */
|
| + /* to the T1 stack) but it doesn't have to put them there */
|
| + /* by itself; previous othersubrs might have left the */
|
| + /* operands there if they were not followed by an */
|
| + /* appropriate number of pops */
|
| + /* */
|
| + /* On the other hand, Adobe Reader 7.0.8 for Linux doesn't */
|
| + /* accept a font that contains charstrings like */
|
| + /* */
|
| + /* 100 200 2 20 callothersubr */
|
| + /* 300 1 20 callothersubr pop */
|
| + /* */
|
| + /* Perhaps this is the reason why BuildCharArray exists. */
|
| +
|
| + switch ( subr_no )
|
| + {
|
| + case 0: /* end flex feature */
|
| + if ( arg_cnt != 3 )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + if ( decoder->flex_state == 0 ||
|
| + decoder->num_flex_vectors != 7 )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " unexpected flex end\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + /* the two `results' are popped by the following setcurrentpoint */
|
| + top[0] = x;
|
| + top[1] = y;
|
| + known_othersubr_result_cnt = 2;
|
| + break;
|
| +
|
| + case 1: /* start flex feature */
|
| + if ( arg_cnt != 0 )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + decoder->flex_state = 1;
|
| + decoder->num_flex_vectors = 0;
|
| + if ( ( error = t1_builder_start_point( builder, x, y ) )
|
| + != FT_Err_Ok ||
|
| + ( error = t1_builder_check_points( builder, 6 ) )
|
| + != FT_Err_Ok )
|
| + goto Fail;
|
| + break;
|
| +
|
| + case 2: /* add flex vectors */
|
| + {
|
| + FT_Int idx;
|
| +
|
| +
|
| + if ( arg_cnt != 0 )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + if ( decoder->flex_state == 0 )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " missing flex start\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + /* note that we should not add a point for index 0; */
|
| + /* this will move our current position to the flex */
|
| + /* point without adding any point to the outline */
|
| + idx = decoder->num_flex_vectors++;
|
| + if ( idx > 0 && idx < 7 )
|
| + t1_builder_add_point( builder,
|
| + x,
|
| + y,
|
| + (FT_Byte)( idx == 3 || idx == 6 ) );
|
| + }
|
| + break;
|
| +
|
| + case 3: /* change hints */
|
| + if ( arg_cnt != 1 )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + known_othersubr_result_cnt = 1;
|
| +
|
| + if ( hinter )
|
| + hinter->reset( hinter->hints,
|
| + (FT_UInt)builder->current->n_points );
|
| + break;
|
| +
|
| + case 12:
|
| + case 13:
|
| + /* counter control hints, clear stack */
|
| + top = decoder->stack;
|
| + break;
|
| +
|
| + case 14:
|
| + case 15:
|
| + case 16:
|
| + case 17:
|
| + case 18: /* multiple masters */
|
| + {
|
| + PS_Blend blend = decoder->blend;
|
| + FT_UInt num_points, nn, mm;
|
| + FT_Long* delta;
|
| + FT_Long* values;
|
| +
|
| +
|
| + if ( !blend )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " unexpected multiple masters operator\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + num_points = (FT_UInt)subr_no - 13 + ( subr_no == 18 );
|
| + if ( arg_cnt != (FT_Int)( num_points * blend->num_designs ) )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " incorrect number of multiple masters arguments\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + /* We want to compute */
|
| + /* */
|
| + /* a0*w0 + a1*w1 + ... + ak*wk */
|
| + /* */
|
| + /* but we only have a0, a1-a0, a2-a0, ..., ak-a0. */
|
| + /* */
|
| + /* However, given that w0 + w1 + ... + wk == 1, we can */
|
| + /* rewrite it easily as */
|
| + /* */
|
| + /* a0 + (a1-a0)*w1 + (a2-a0)*w2 + ... + (ak-a0)*wk */
|
| + /* */
|
| + /* where k == num_designs-1. */
|
| + /* */
|
| + /* I guess that's why it's written in this `compact' */
|
| + /* form. */
|
| + /* */
|
| + delta = top + num_points;
|
| + values = top;
|
| + for ( nn = 0; nn < num_points; nn++ )
|
| + {
|
| + FT_Long tmp = values[0];
|
| +
|
| +
|
| + for ( mm = 1; mm < blend->num_designs; mm++ )
|
| + tmp += FT_MulFix( *delta++, blend->weight_vector[mm] );
|
| +
|
| + *values++ = tmp;
|
| + }
|
| +
|
| + known_othersubr_result_cnt = (FT_Int)num_points;
|
| + break;
|
| + }
|
| +
|
| + case 19:
|
| + /* <idx> 1 19 callothersubr */
|
| + /* => replace elements starting from index cvi( <idx> ) */
|
| + /* of BuildCharArray with WeightVector */
|
| + {
|
| + FT_Int idx;
|
| + PS_Blend blend = decoder->blend;
|
| +
|
| +
|
| + if ( arg_cnt != 1 || blend == NULL )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + idx = Fix2Int( top[0] );
|
| +
|
| + if ( idx < 0 ||
|
| + (FT_UInt)idx + blend->num_designs > decoder->len_buildchar )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + ft_memcpy( &decoder->buildchar[idx],
|
| + blend->weight_vector,
|
| + blend->num_designs *
|
| + sizeof ( blend->weight_vector[0] ) );
|
| + }
|
| + break;
|
| +
|
| + case 20:
|
| + /* <arg1> <arg2> 2 20 callothersubr pop */
|
| + /* ==> push <arg1> + <arg2> onto T1 stack */
|
| + if ( arg_cnt != 2 )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + top[0] += top[1]; /* XXX (over|under)flow */
|
| +
|
| + known_othersubr_result_cnt = 1;
|
| + break;
|
| +
|
| + case 21:
|
| + /* <arg1> <arg2> 2 21 callothersubr pop */
|
| + /* ==> push <arg1> - <arg2> onto T1 stack */
|
| + if ( arg_cnt != 2 )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + top[0] -= top[1]; /* XXX (over|under)flow */
|
| +
|
| + known_othersubr_result_cnt = 1;
|
| + break;
|
| +
|
| + case 22:
|
| + /* <arg1> <arg2> 2 22 callothersubr pop */
|
| + /* ==> push <arg1> * <arg2> onto T1 stack */
|
| + if ( arg_cnt != 2 )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + top[0] = FT_MulFix( top[0], top[1] );
|
| +
|
| + known_othersubr_result_cnt = 1;
|
| + break;
|
| +
|
| + case 23:
|
| + /* <arg1> <arg2> 2 23 callothersubr pop */
|
| + /* ==> push <arg1> / <arg2> onto T1 stack */
|
| + if ( arg_cnt != 2 || top[1] == 0 )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + top[0] = FT_DivFix( top[0], top[1] );
|
| +
|
| + known_othersubr_result_cnt = 1;
|
| + break;
|
| +
|
| + case 24:
|
| + /* <val> <idx> 2 24 callothersubr */
|
| + /* ==> set BuildCharArray[cvi( <idx> )] = <val> */
|
| + {
|
| + FT_Int idx;
|
| + PS_Blend blend = decoder->blend;
|
| +
|
| +
|
| + if ( arg_cnt != 2 || blend == NULL )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + idx = Fix2Int( top[1] );
|
| +
|
| + if ( idx < 0 || (FT_UInt) idx >= decoder->len_buildchar )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + decoder->buildchar[idx] = top[0];
|
| + }
|
| + break;
|
| +
|
| + case 25:
|
| + /* <idx> 1 25 callothersubr pop */
|
| + /* ==> push BuildCharArray[cvi( idx )] */
|
| + /* onto T1 stack */
|
| + {
|
| + FT_Int idx;
|
| + PS_Blend blend = decoder->blend;
|
| +
|
| +
|
| + if ( arg_cnt != 1 || blend == NULL )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + idx = Fix2Int( top[0] );
|
| +
|
| + if ( idx < 0 || (FT_UInt) idx >= decoder->len_buildchar )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + top[0] = decoder->buildchar[idx];
|
| + }
|
| +
|
| + known_othersubr_result_cnt = 1;
|
| + break;
|
| +
|
| +#if 0
|
| + case 26:
|
| + /* <val> mark <idx> ==> set BuildCharArray[cvi( <idx> )] = <val>, */
|
| + /* leave mark on T1 stack */
|
| + /* <val> <idx> ==> set BuildCharArray[cvi( <idx> )] = <val> */
|
| + XXX which routine has left its mark on the (PostScript) stack?;
|
| + break;
|
| +#endif
|
| +
|
| + case 27:
|
| + /* <res1> <res2> <val1> <val2> 4 27 callothersubr pop */
|
| + /* ==> push <res1> onto T1 stack if <val1> <= <val2>, */
|
| + /* otherwise push <res2> */
|
| + if ( arg_cnt != 4 )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + if ( top[2] > top[3] )
|
| + top[0] = top[1];
|
| +
|
| + known_othersubr_result_cnt = 1;
|
| + break;
|
| +
|
| + case 28:
|
| + /* 0 28 callothersubr pop */
|
| + /* => push random value from interval [0, 1) onto stack */
|
| + if ( arg_cnt != 0 )
|
| + goto Unexpected_OtherSubr;
|
| +
|
| + {
|
| + FT_Fixed Rand;
|
| +
|
| +
|
| + Rand = seed;
|
| + if ( Rand >= 0x8000L )
|
| + Rand++;
|
| +
|
| + top[0] = Rand;
|
| +
|
| + seed = FT_MulFix( seed, 0x10000L - seed );
|
| + if ( seed == 0 )
|
| + seed += 0x2873;
|
| + }
|
| +
|
| + known_othersubr_result_cnt = 1;
|
| + break;
|
| +
|
| + default:
|
| + if ( arg_cnt >= 0 && subr_no >= 0 )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " unknown othersubr [%d %d], wish me luck\n",
|
| + arg_cnt, subr_no ));
|
| + unknown_othersubr_result_cnt = arg_cnt;
|
| + break;
|
| + }
|
| + /* fall through */
|
| +
|
| + Unexpected_OtherSubr:
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " invalid othersubr [%d %d]\n", arg_cnt, subr_no ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + top += known_othersubr_result_cnt;
|
| +
|
| + decoder->top = top;
|
| + }
|
| + else /* general operator */
|
| + {
|
| + FT_Int num_args = t1_args_count[op];
|
| +
|
| +
|
| + FT_ASSERT( num_args >= 0 );
|
| +
|
| + if ( top - decoder->stack < num_args )
|
| + goto Stack_Underflow;
|
| +
|
| + /* XXX Operators usually take their operands from the */
|
| + /* bottom of the stack, i.e., the operands are */
|
| + /* decoder->stack[0], ..., decoder->stack[num_args - 1]; */
|
| + /* only div, callsubr, and callothersubr are different. */
|
| + /* In practice it doesn't matter (?). */
|
| +
|
| +#ifdef FT_DEBUG_LEVEL_TRACE
|
| +
|
| + switch ( op )
|
| + {
|
| + case op_callsubr:
|
| + case op_div:
|
| + case op_callothersubr:
|
| + case op_pop:
|
| + case op_return:
|
| + break;
|
| +
|
| + default:
|
| + if ( top - decoder->stack != num_args )
|
| + FT_TRACE0(( "t1_decoder_parse_charstrings:"
|
| + " too much operands on the stack"
|
| + " (seen %d, expected %d)\n",
|
| + top - decoder->stack, num_args ));
|
| + break;
|
| + }
|
| +
|
| +#endif /* FT_DEBUG_LEVEL_TRACE */
|
| +
|
| + top -= num_args;
|
| +
|
| + switch ( op )
|
| + {
|
| + case op_endchar:
|
| + FT_TRACE4(( " endchar\n" ));
|
| +
|
| + t1_builder_close_contour( builder );
|
| +
|
| + /* close hints recording session */
|
| + if ( hinter )
|
| + {
|
| + if ( hinter->close( hinter->hints,
|
| + (FT_UInt)builder->current->n_points ) )
|
| + goto Syntax_Error;
|
| +
|
| + /* apply hints to the loaded glyph outline now */
|
| + error = hinter->apply( hinter->hints,
|
| + builder->current,
|
| + (PSH_Globals)builder->hints_globals,
|
| + decoder->hint_mode );
|
| + if ( error )
|
| + goto Fail;
|
| + }
|
| +
|
| + /* add current outline to the glyph slot */
|
| + FT_GlyphLoader_Add( builder->loader );
|
| +
|
| + /* the compiler should optimize away this empty loop but ... */
|
| +
|
| +#ifdef FT_DEBUG_LEVEL_TRACE
|
| +
|
| + if ( decoder->len_buildchar > 0 )
|
| + {
|
| + FT_UInt i;
|
| +
|
| +
|
| + FT_TRACE4(( "BuildCharArray = [ " ));
|
| +
|
| + for ( i = 0; i < decoder->len_buildchar; ++i )
|
| + FT_TRACE4(( "%d ", decoder->buildchar[i] ));
|
| +
|
| + FT_TRACE4(( "]\n" ));
|
| + }
|
| +
|
| +#endif /* FT_DEBUG_LEVEL_TRACE */
|
| +
|
| + FT_TRACE4(( "\n" ));
|
| +
|
| + /* return now! */
|
| + return FT_Err_Ok;
|
| +
|
| + case op_hsbw:
|
| + FT_TRACE4(( " hsbw" ));
|
| +
|
| + builder->parse_state = T1_Parse_Have_Width;
|
| +
|
| + builder->left_bearing.x += top[0];
|
| + builder->advance.x = top[1];
|
| + builder->advance.y = 0;
|
| +
|
| + orig_x = x = builder->pos_x + top[0];
|
| + orig_y = y = builder->pos_y;
|
| +
|
| + FT_UNUSED( orig_y );
|
| +
|
| + /* the `metrics_only' indicates that we only want to compute */
|
| + /* the glyph's metrics (lsb + advance width), not load the */
|
| + /* rest of it; so exit immediately */
|
| + if ( builder->metrics_only )
|
| + return FT_Err_Ok;
|
| +
|
| + break;
|
| +
|
| + case op_seac:
|
| + return t1operator_seac( decoder,
|
| + top[0],
|
| + top[1],
|
| + top[2],
|
| + Fix2Int( top[3] ),
|
| + Fix2Int( top[4] ) );
|
| +
|
| + case op_sbw:
|
| + FT_TRACE4(( " sbw" ));
|
| +
|
| + builder->parse_state = T1_Parse_Have_Width;
|
| +
|
| + builder->left_bearing.x += top[0];
|
| + builder->left_bearing.y += top[1];
|
| + builder->advance.x = top[2];
|
| + builder->advance.y = top[3];
|
| +
|
| + x = builder->pos_x + top[0];
|
| + y = builder->pos_y + top[1];
|
| +
|
| + /* the `metrics_only' indicates that we only want to compute */
|
| + /* the glyph's metrics (lsb + advance width), not load the */
|
| + /* rest of it; so exit immediately */
|
| + if ( builder->metrics_only )
|
| + return FT_Err_Ok;
|
| +
|
| + break;
|
| +
|
| + case op_closepath:
|
| + FT_TRACE4(( " closepath" ));
|
| +
|
| + /* if there is no path, `closepath' is a no-op */
|
| + if ( builder->parse_state == T1_Parse_Have_Path ||
|
| + builder->parse_state == T1_Parse_Have_Moveto )
|
| + t1_builder_close_contour( builder );
|
| +
|
| + builder->parse_state = T1_Parse_Have_Width;
|
| + break;
|
| +
|
| + case op_hlineto:
|
| + FT_TRACE4(( " hlineto" ));
|
| +
|
| + if ( ( error = t1_builder_start_point( builder, x, y ) )
|
| + != FT_Err_Ok )
|
| + goto Fail;
|
| +
|
| + x += top[0];
|
| + goto Add_Line;
|
| +
|
| + case op_hmoveto:
|
| + FT_TRACE4(( " hmoveto" ));
|
| +
|
| + x += top[0];
|
| + if ( !decoder->flex_state )
|
| + {
|
| + if ( builder->parse_state == T1_Parse_Start )
|
| + goto Syntax_Error;
|
| + builder->parse_state = T1_Parse_Have_Moveto;
|
| + }
|
| + break;
|
| +
|
| + case op_hvcurveto:
|
| + FT_TRACE4(( " hvcurveto" ));
|
| +
|
| + if ( ( error = t1_builder_start_point( builder, x, y ) )
|
| + != FT_Err_Ok ||
|
| + ( error = t1_builder_check_points( builder, 3 ) )
|
| + != FT_Err_Ok )
|
| + goto Fail;
|
| +
|
| + x += top[0];
|
| + t1_builder_add_point( builder, x, y, 0 );
|
| + x += top[1];
|
| + y += top[2];
|
| + t1_builder_add_point( builder, x, y, 0 );
|
| + y += top[3];
|
| + t1_builder_add_point( builder, x, y, 1 );
|
| + break;
|
| +
|
| + case op_rlineto:
|
| + FT_TRACE4(( " rlineto" ));
|
| +
|
| + if ( ( error = t1_builder_start_point( builder, x, y ) )
|
| + != FT_Err_Ok )
|
| + goto Fail;
|
| +
|
| + x += top[0];
|
| + y += top[1];
|
| +
|
| + Add_Line:
|
| + if ( ( error = t1_builder_add_point1( builder, x, y ) )
|
| + != FT_Err_Ok )
|
| + goto Fail;
|
| + break;
|
| +
|
| + case op_rmoveto:
|
| + FT_TRACE4(( " rmoveto" ));
|
| +
|
| + x += top[0];
|
| + y += top[1];
|
| + if ( !decoder->flex_state )
|
| + {
|
| + if ( builder->parse_state == T1_Parse_Start )
|
| + goto Syntax_Error;
|
| + builder->parse_state = T1_Parse_Have_Moveto;
|
| + }
|
| + break;
|
| +
|
| + case op_rrcurveto:
|
| + FT_TRACE4(( " rrcurveto" ));
|
| +
|
| + if ( ( error = t1_builder_start_point( builder, x, y ) )
|
| + != FT_Err_Ok ||
|
| + ( error = t1_builder_check_points( builder, 3 ) )
|
| + != FT_Err_Ok )
|
| + goto Fail;
|
| +
|
| + x += top[0];
|
| + y += top[1];
|
| + t1_builder_add_point( builder, x, y, 0 );
|
| +
|
| + x += top[2];
|
| + y += top[3];
|
| + t1_builder_add_point( builder, x, y, 0 );
|
| +
|
| + x += top[4];
|
| + y += top[5];
|
| + t1_builder_add_point( builder, x, y, 1 );
|
| + break;
|
| +
|
| + case op_vhcurveto:
|
| + FT_TRACE4(( " vhcurveto" ));
|
| +
|
| + if ( ( error = t1_builder_start_point( builder, x, y ) )
|
| + != FT_Err_Ok ||
|
| + ( error = t1_builder_check_points( builder, 3 ) )
|
| + != FT_Err_Ok )
|
| + goto Fail;
|
| +
|
| + y += top[0];
|
| + t1_builder_add_point( builder, x, y, 0 );
|
| + x += top[1];
|
| + y += top[2];
|
| + t1_builder_add_point( builder, x, y, 0 );
|
| + x += top[3];
|
| + t1_builder_add_point( builder, x, y, 1 );
|
| + break;
|
| +
|
| + case op_vlineto:
|
| + FT_TRACE4(( " vlineto" ));
|
| +
|
| + if ( ( error = t1_builder_start_point( builder, x, y ) )
|
| + != FT_Err_Ok )
|
| + goto Fail;
|
| +
|
| + y += top[0];
|
| + goto Add_Line;
|
| +
|
| + case op_vmoveto:
|
| + FT_TRACE4(( " vmoveto" ));
|
| +
|
| + y += top[0];
|
| + if ( !decoder->flex_state )
|
| + {
|
| + if ( builder->parse_state == T1_Parse_Start )
|
| + goto Syntax_Error;
|
| + builder->parse_state = T1_Parse_Have_Moveto;
|
| + }
|
| + break;
|
| +
|
| + case op_div:
|
| + FT_TRACE4(( " div" ));
|
| +
|
| + /* if `large_int' is set, we divide unscaled numbers; */
|
| + /* otherwise, we divide numbers in 16.16 format -- */
|
| + /* in both cases, it is the same operation */
|
| + *top = FT_DivFix( top[0], top[1] );
|
| + ++top;
|
| +
|
| + large_int = FALSE;
|
| + break;
|
| +
|
| + case op_callsubr:
|
| + {
|
| + FT_Int idx;
|
| +
|
| +
|
| + FT_TRACE4(( " callsubr" ));
|
| +
|
| + idx = Fix2Int( top[0] );
|
| + if ( idx < 0 || idx >= decoder->num_subrs )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " invalid subrs index\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + if ( zone - decoder->zones >= T1_MAX_SUBRS_CALLS )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " too many nested subrs\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + zone->cursor = ip; /* save current instruction pointer */
|
| +
|
| + zone++;
|
| +
|
| + /* The Type 1 driver stores subroutines without the seed bytes. */
|
| + /* The CID driver stores subroutines with seed bytes. This */
|
| + /* case is taken care of when decoder->subrs_len == 0. */
|
| + zone->base = decoder->subrs[idx];
|
| +
|
| + if ( decoder->subrs_len )
|
| + zone->limit = zone->base + decoder->subrs_len[idx];
|
| + else
|
| + {
|
| + /* We are using subroutines from a CID font. We must adjust */
|
| + /* for the seed bytes. */
|
| + zone->base += ( decoder->lenIV >= 0 ? decoder->lenIV : 0 );
|
| + zone->limit = decoder->subrs[idx + 1];
|
| + }
|
| +
|
| + zone->cursor = zone->base;
|
| +
|
| + if ( !zone->base )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " invoking empty subrs\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + decoder->zone = zone;
|
| + ip = zone->base;
|
| + limit = zone->limit;
|
| + break;
|
| + }
|
| +
|
| + case op_pop:
|
| + FT_TRACE4(( " pop" ));
|
| +
|
| + if ( known_othersubr_result_cnt > 0 )
|
| + {
|
| + known_othersubr_result_cnt--;
|
| + /* ignore, we pushed the operands ourselves */
|
| + break;
|
| + }
|
| +
|
| + if ( unknown_othersubr_result_cnt == 0 )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " no more operands for othersubr\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + unknown_othersubr_result_cnt--;
|
| + top++; /* `push' the operand to callothersubr onto the stack */
|
| + break;
|
| +
|
| + case op_return:
|
| + FT_TRACE4(( " return" ));
|
| +
|
| + if ( zone <= decoder->zones )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " unexpected return\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + zone--;
|
| + ip = zone->cursor;
|
| + limit = zone->limit;
|
| + decoder->zone = zone;
|
| + break;
|
| +
|
| + case op_dotsection:
|
| + FT_TRACE4(( " dotsection" ));
|
| +
|
| + break;
|
| +
|
| + case op_hstem:
|
| + FT_TRACE4(( " hstem" ));
|
| +
|
| + /* record horizontal hint */
|
| + if ( hinter )
|
| + {
|
| + /* top[0] += builder->left_bearing.y; */
|
| + hinter->stem( hinter->hints, 1, top );
|
| + }
|
| + break;
|
| +
|
| + case op_hstem3:
|
| + FT_TRACE4(( " hstem3" ));
|
| +
|
| + /* record horizontal counter-controlled hints */
|
| + if ( hinter )
|
| + hinter->stem3( hinter->hints, 1, top );
|
| + break;
|
| +
|
| + case op_vstem:
|
| + FT_TRACE4(( " vstem" ));
|
| +
|
| + /* record vertical hint */
|
| + if ( hinter )
|
| + {
|
| + top[0] += orig_x;
|
| + hinter->stem( hinter->hints, 0, top );
|
| + }
|
| + break;
|
| +
|
| + case op_vstem3:
|
| + FT_TRACE4(( " vstem3" ));
|
| +
|
| + /* record vertical counter-controlled hints */
|
| + if ( hinter )
|
| + {
|
| + FT_Pos dx = orig_x;
|
| +
|
| +
|
| + top[0] += dx;
|
| + top[2] += dx;
|
| + top[4] += dx;
|
| + hinter->stem3( hinter->hints, 0, top );
|
| + }
|
| + break;
|
| +
|
| + case op_setcurrentpoint:
|
| + FT_TRACE4(( " setcurrentpoint" ));
|
| +
|
| + /* From the T1 specification, section 6.4: */
|
| + /* */
|
| + /* The setcurrentpoint command is used only in */
|
| + /* conjunction with results from OtherSubrs procedures. */
|
| +
|
| + /* known_othersubr_result_cnt != 0 is already handled */
|
| + /* above. */
|
| +
|
| + /* Note, however, that both Ghostscript and Adobe */
|
| + /* Distiller handle this situation by silently ignoring */
|
| + /* the inappropriate `setcurrentpoint' instruction. So */
|
| + /* we do the same. */
|
| +#if 0
|
| +
|
| + if ( decoder->flex_state != 1 )
|
| + {
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " unexpected `setcurrentpoint'\n" ));
|
| + goto Syntax_Error;
|
| + }
|
| + else
|
| + ...
|
| +#endif
|
| +
|
| + x = top[0];
|
| + y = top[1];
|
| + decoder->flex_state = 0;
|
| + break;
|
| +
|
| + case op_unknown15:
|
| + FT_TRACE4(( " opcode_15" ));
|
| + /* nothing to do except to pop the two arguments */
|
| + break;
|
| +
|
| + default:
|
| + FT_ERROR(( "t1_decoder_parse_charstrings:"
|
| + " unhandled opcode %d\n", op ));
|
| + goto Syntax_Error;
|
| + }
|
| +
|
| + /* XXX Operators usually clear the operand stack; */
|
| + /* only div, callsubr, callothersubr, pop, and */
|
| + /* return are different. */
|
| + /* In practice it doesn't matter (?). */
|
| +
|
| + decoder->top = top;
|
| +
|
| +#ifdef FT_DEBUG_LEVEL_TRACE
|
| + FT_TRACE4(( "\n" ));
|
| + bol = TRUE;
|
| +#endif
|
| +
|
| + } /* general operator processing */
|
| +
|
| + } /* while ip < limit */
|
| +
|
| + FT_TRACE4(( "..end..\n\n" ));
|
| +
|
| + Fail:
|
| + return error;
|
| +
|
| + Syntax_Error:
|
| + return FT_THROW( Syntax_Error );
|
| +
|
| + Stack_Underflow:
|
| + return FT_THROW( Stack_Underflow );
|
| + }
|
| +
|
| +
|
| + /* parse a single Type 1 glyph */
|
| + FT_LOCAL_DEF( FT_Error )
|
| + t1_decoder_parse_glyph( T1_Decoder decoder,
|
| + FT_UInt glyph )
|
| + {
|
| + return decoder->parse_callback( decoder, glyph );
|
| + }
|
| +
|
| +
|
| + /* initialize T1 decoder */
|
| + FT_LOCAL_DEF( FT_Error )
|
| + t1_decoder_init( T1_Decoder decoder,
|
| + FT_Face face,
|
| + FT_Size size,
|
| + FT_GlyphSlot slot,
|
| + FT_Byte** glyph_names,
|
| + PS_Blend blend,
|
| + FT_Bool hinting,
|
| + FT_Render_Mode hint_mode,
|
| + T1_Decoder_Callback parse_callback )
|
| + {
|
| + FT_MEM_ZERO( decoder, sizeof ( *decoder ) );
|
| +
|
| + /* retrieve PSNames interface from list of current modules */
|
| + {
|
| + FT_Service_PsCMaps psnames;
|
| +
|
| +
|
| + FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
|
| + if ( !psnames )
|
| + {
|
| + FT_ERROR(( "t1_decoder_init:"
|
| + " the `psnames' module is not available\n" ));
|
| + return FT_THROW( Unimplemented_Feature );
|
| + }
|
| +
|
| + decoder->psnames = psnames;
|
| + }
|
| +
|
| + t1_builder_init( &decoder->builder, face, size, slot, hinting );
|
| +
|
| + /* decoder->buildchar and decoder->len_buildchar have to be */
|
| + /* initialized by the caller since we cannot know the length */
|
| + /* of the BuildCharArray */
|
| +
|
| + decoder->num_glyphs = (FT_UInt)face->num_glyphs;
|
| + decoder->glyph_names = glyph_names;
|
| + decoder->hint_mode = hint_mode;
|
| + decoder->blend = blend;
|
| + decoder->parse_callback = parse_callback;
|
| +
|
| + decoder->funcs = t1_decoder_funcs;
|
| +
|
| + return FT_Err_Ok;
|
| + }
|
| +
|
| +
|
| + /* finalize T1 decoder */
|
| + FT_LOCAL_DEF( void )
|
| + t1_decoder_done( T1_Decoder decoder )
|
| + {
|
| + t1_builder_done( &decoder->builder );
|
| + }
|
| +
|
| +
|
| +/* END */
|
|
|