+++ /dev/null
-/***************************************************************************/
-/* */
-/* t1decode.c */
-/* */
-/* PostScript Type 1 decoding routines (body). */
-/* */
-/* Copyright 2000-2001 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_DEBUG_H
-#include FT_OUTLINE_H
-
-#include "t1decode.h"
-#include "psobjs.h"
-
-#include "psauxerr.h"
-
-
- /*************************************************************************/
- /* */
- /* 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_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 */
- };
-
-
- /*************************************************************************/
- /* */
- /* <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;
- PSNames_Interface* 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 && strcmp( name,glyph_name ) == 0 )
- return 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, n_base_points;
- FT_Outline* base = decoder->builder.base;
- FT_Vector left_bearing, advance;
-
-
- /* 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? */
- if ( decoder->glyph_names == 0 )
- {
- FT_ERROR(( "t1operator_seac:" ));
- FT_ERROR(( " glyph names table not available in this font!\n" ));
- return PSaux_Err_Syntax_Error;
- }
-
- 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:" ));
- FT_ERROR(( " invalid seac character code arguments\n" ));
- return PSaux_Err_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_Check_Subglyphs( 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 = adx - asb;
- subg->arg2 = 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;
- }
-
- /* First load `bchar' in builder */
- /* now load the unscaled outline */
-
- FT_GlyphLoader_Prepare( decoder->builder.loader ); /* prepare loader */
-
- error = T1_Decoder_Parse_Glyph( decoder, bchar_index );
- if ( error )
- goto Exit;
-
- n_base_points = base->n_points;
-
- /* 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;
-
- /* Now load `achar' on top of */
- /* the base outline */
- error = T1_Decoder_Parse_Glyph( decoder, achar_index );
- 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;
-
- /* Finally, move the accent */
- if ( decoder->builder.load_points )
- {
- FT_Outline dummy;
-
-
- dummy.n_points = (short)( base->n_points - n_base_points );
- dummy.points = base->points + n_base_points;
-
- FT_Outline_Translate( &dummy, adx - asb, ady );
- }
-
- 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;
-
-
- /* we don't want to touch the source code -- use macro trick */
-#define start_point T1_Builder_Start_Point
-#define check_points T1_Builder_Check_Points
-#define add_point T1_Builder_Add_Point
-#define add_point1 T1_Builder_Add_Point1
-#define add_contour T1_Builder_Add_Contour
-#define close_contour T1_Builder_Close_Contour
-
- /* First of all, initialize the decoder */
- decoder->top = decoder->stack;
- decoder->zone = decoder->zones;
- zone = decoder->zones;
-
- builder->path_begun = 0;
-
- zone->base = charstring_base;
- limit = zone->limit = charstring_base + charstring_len;
- ip = zone->cursor = zone->base;
-
- error = PSaux_Err_Ok;
-
- x = builder->pos_x;
- y = builder->pos_y;
-
- /* now, execute loop */
- while ( ip < limit )
- {
- FT_Long* top = decoder->top;
- T1_Operator op = op_none;
- FT_Long value = 0;
-
-
- /*********************************************************************/
- /* */
- /* 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 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_Long)ip[0] << 24) |
- ((FT_Long)ip[1] << 16) |
- ((FT_Long)ip[2] << 8 ) |
- ip[3] );
- ip += 4;
- break;
-
- default:
- if ( ip[-1] >= 32 )
- {
- if ( ip[-1] < 247 )
- value = (FT_Long)ip[-1] - 139;
- else
- {
- if ( ++ip > limit )
- {
- FT_ERROR(( "T1_Decoder_Parse_CharStrings: " ));
- FT_ERROR(( "unexpected EOF in integer\n" ));
- goto Syntax_Error;
- }
-
- if ( ip[-2] < 251 )
- value = ( ( (FT_Long)ip[-2] - 247 ) << 8 ) + ip[-1] + 108;
- else
- value = -( ( ( (FT_Long)ip[-2] - 251 ) << 8 ) + ip[-1] + 108 );
- }
- }
- else
- {
- FT_ERROR(( "T1_Decoder_Parse_CharStrings: "
- "invalid byte (%d)\n", ip[-1] ));
- goto Syntax_Error;
- }
- }
-
- /*********************************************************************/
- /* */
- /* 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;
- }
-
- FT_TRACE4(( " %ld", value ));
-
- *top++ = value;
- decoder->top = top;
- }
- else if ( op == op_callothersubr ) /* callothersubr */
- {
- FT_TRACE4(( " callothersubr" ));
-
- if ( top - decoder->stack < 2 )
- goto Stack_Underflow;
-
- top -= 2;
- switch ( top[1] )
- {
- case 1: /* start flex feature */
- if ( top[0] != 0 )
- goto Unexpected_OtherSubr;
-
- decoder->flex_state = 1;
- decoder->num_flex_vectors = 0;
- if ( start_point( builder, x, y ) ||
- check_points( builder, 6 ) )
- goto Memory_Error;
- break;
-
- case 2: /* add flex vectors */
- {
- FT_Int index;
-
- if ( top[0] != 0 )
- goto Unexpected_OtherSubr;
-
- /* 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 */
- index = decoder->num_flex_vectors++;
- if ( index > 0 && index < 7 )
- add_point( builder,
- x,
- y,
- (FT_Byte)( index == 3 || index == 6 ) );
- }
- break;
-
- case 0: /* end flex feature */
- if ( top[0] != 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;
- }
-
- /* now consume the remaining `pop pop setcurpoint' */
- if ( ip + 6 > limit ||
- ip[0] != 12 || ip[1] != 17 || /* pop */
- ip[2] != 12 || ip[3] != 17 || /* pop */
- ip[4] != 12 || ip[5] != 33 ) /* setcurpoint */
- {
- FT_ERROR(( "T1_Decoder_Parse_CharStrings: "
- "invalid flex charstring\n" ));
- goto Syntax_Error;
- }
-
- ip += 6;
- decoder->flex_state = 0;
- break;
-
- case 3: /* change hints */
- if ( top[0] != 1 )
- goto Unexpected_OtherSubr;
-
- /* eat the following `pop' */
- if ( ip + 2 > limit )
- {
- FT_ERROR(( "T1_Decoder_Parse_CharStrings: "
- "invalid escape (12+%d)\n", ip[-1] ));
- goto Syntax_Error;
- }
-
- if ( ip[0] != 12 || ip[1] != 17 )
- {
- FT_ERROR(( "T1_Decoder_Parse_CharStrings: " ));
- FT_ERROR(( "`pop' expected, found (%d %d)\n", ip[0], ip[1] ));
- goto Syntax_Error;
- }
- ip += 2;
- 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 */
- {
- T1_Blend* blend = decoder->blend;
- FT_UInt num_points, nn, mm;
- FT_Long* delta;
- FT_Long* values;
-
-
- if ( !blend )
- {
- FT_ERROR(( "T1_Decoder_Parse_CharStrings: " ));
- FT_ERROR(( "unexpected multiple masters operator!\n" ));
- goto Syntax_Error;
- }
-
- num_points = top[1] - 13 + ( top[1] == 18 );
- if ( top[0] != (FT_Int)( num_points * blend->num_designs ) )
- {
- FT_ERROR(( "T1_Decoder_Parse_CharStrings: " ));
- FT_ERROR(( "incorrect number of mm arguments\n" ));
- goto Syntax_Error;
- }
-
- top -= blend->num_designs*num_points;
- if ( top < decoder->stack )
- goto Stack_Underflow;
-
- /* we want to compute: */
- /* */
- /* a0*w0 + a1*w1 + ... + ak*wk */
- /* */
- /* but we only have the 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_Int tmp = values[0];
-
-
- for ( mm = 1; mm < blend->num_designs; mm++ )
- tmp += FT_MulFix( *delta++, blend->weight_vector[mm] );
-
- *values++ = tmp;
- }
- /* note that `top' will be incremented later by calls to `pop' */
- break;
- }
-
- default:
- Unexpected_OtherSubr:
- FT_ERROR(( "T1_Decoder_Parse_CharStrings: "
- "invalid othersubr [%d %d]!\n", top[0], top[1] ));
- goto Syntax_Error;
- }
- decoder->top = top;
- }
- else /* general operator */
- {
- FT_Int num_args = t1_args_count[op];
-
-
- if ( top - decoder->stack < num_args )
- goto Stack_Underflow;
-
- top -= num_args;
-
- switch ( op )
- {
- case op_endchar:
- FT_TRACE4(( " endchar" ));
-
- close_contour( builder );
-
- /* add current outline to the glyph slot */
- FT_GlyphLoader_Add( builder->loader );
-
- /* return now! */
- FT_TRACE4(( "\n\n" ));
- return PSaux_Err_Ok;
-
- case op_hsbw:
- FT_TRACE4(( " hsbw" ));
-
- builder->left_bearing.x += top[0];
- builder->advance.x = top[1];
- builder->advance.y = 0;
-
- builder->last.x = x = top[0];
- builder->last.y = y = 0;
-
- /* 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 PSaux_Err_Ok;
-
- break;
-
- case op_seac:
- /* return immediately after the processing */
- return t1operator_seac( decoder, top[0], top[1],
- top[2], top[3], top[4] );
-
- case op_sbw:
- FT_TRACE4(( " sbw" ));
-
- builder->left_bearing.x += top[0];
- builder->left_bearing.y += top[1];
- builder->advance.x = top[2];
- builder->advance.y = top[3];
-
- builder->last.x = x = top[0];
- builder->last.y = 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 PSaux_Err_Ok;
-
- break;
-
- case op_closepath:
- FT_TRACE4(( " closepath" ));
-
- close_contour( builder );
- builder->path_begun = 0;
- break;
-
- case op_hlineto:
- FT_TRACE4(( " hlineto" ));
-
- if ( start_point( builder, x, y ) )
- goto Memory_Error;
-
- x += top[0];
- goto Add_Line;
-
- case op_hmoveto:
- FT_TRACE4(( " hmoveto" ));
-
- x += top[0];
- if ( !decoder->flex_state )
- builder->path_begun = 0;
- break;
-
- case op_hvcurveto:
- FT_TRACE4(( " hvcurveto" ));
-
- if ( start_point( builder, x, y ) ||
- check_points( builder, 3 ) )
- goto Memory_Error;
-
- x += top[0];
- add_point( builder, x, y, 0 );
- x += top[1];
- y += top[2];
- add_point( builder, x, y, 0 );
- y += top[3];
- add_point( builder, x, y, 1 );
- break;
-
- case op_rlineto:
- FT_TRACE4(( " rlineto" ));
-
- if ( start_point( builder, x, y ) )
- goto Memory_Error;
-
- x += top[0];
- y += top[1];
-
- Add_Line:
- if ( add_point1( builder, x, y ) )
- goto Memory_Error;
- break;
-
- case op_rmoveto:
- FT_TRACE4(( " rmoveto" ));
-
- x += top[0];
- y += top[1];
- if ( !decoder->flex_state )
- builder->path_begun = 0;
- break;
-
- case op_rrcurveto:
- FT_TRACE4(( " rcurveto" ));
-
- if ( start_point( builder, x, y ) ||
- check_points( builder, 3 ) )
- goto Memory_Error;
-
- x += top[0];
- y += top[1];
- add_point( builder, x, y, 0 );
-
- x += top[2];
- y += top[3];
- add_point( builder, x, y, 0 );
-
- x += top[4];
- y += top[5];
- add_point( builder, x, y, 1 );
- break;
-
- case op_vhcurveto:
- FT_TRACE4(( " vhcurveto" ));
-
- if ( start_point( builder, x, y ) ||
- check_points( builder, 3 ) )
- goto Memory_Error;
-
- y += top[0];
- add_point( builder, x, y, 0 );
- x += top[1];
- y += top[2];
- add_point( builder, x, y, 0 );
- x += top[3];
- add_point( builder, x, y, 1 );
- break;
-
- case op_vlineto:
- FT_TRACE4(( " vlineto" ));
-
- if ( start_point( builder, x, y ) )
- goto Memory_Error;
-
- y += top[0];
- goto Add_Line;
-
- case op_vmoveto:
- FT_TRACE4(( " vmoveto" ));
-
- y += top[0];
- if ( !decoder->flex_state )
- builder->path_begun = 0;
- break;
-
- case op_div:
- FT_TRACE4(( " div" ));
-
- if ( top[1] )
- {
- *top = top[0] / top[1];
- ++top;
- }
- else
- {
- FT_ERROR(( "T1_Decoder_Parse_CharStrings: division by 0\n" ));
- goto Syntax_Error;
- }
- break;
-
- case op_callsubr:
- {
- FT_Int index;
-
-
- FT_TRACE4(( " callsubr" ));
-
- index = top[0];
- if ( index < 0 || index >= (FT_Int)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[index];
-
- if ( decoder->subrs_len )
- zone->limit = zone->base + decoder->subrs_len[index];
- 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[index + 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" ));
-
- /* theoretically, the arguments are already on the stack */
- top++;
- 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" ));
-
- break;
-
- case op_hstem3:
- FT_TRACE4(( " hstem3" ));
-
- break;
-
- case op_vstem:
- FT_TRACE4(( " vstem" ));
-
- break;
-
- case op_vstem3:
- FT_TRACE4(( " vstem3" ));
-
- break;
-
- case op_setcurrentpoint:
- FT_TRACE4(( " setcurrentpoint" ));
-
- FT_ERROR(( "T1_Decoder_Parse_CharStrings: " ));
- FT_ERROR(( "unexpected `setcurrentpoint'\n" ));
- goto Syntax_Error;
-
- default:
- FT_ERROR(( "T1_Decoder_Parse_CharStrings: "
- "unhandled opcode %d\n", op ));
- goto Syntax_Error;
- }
-
- decoder->top = top;
-
- } /* general operator processing */
-
- } /* while ip < limit */
-
- FT_TRACE4(( "..end..\n\n" ));
- return error;
-
- Syntax_Error:
- return PSaux_Err_Syntax_Error;
-
- Stack_Underflow:
- return PSaux_Err_Stack_Underflow;
-
- Memory_Error:
- return builder->error;
- }
-
-
- FT_LOCAL_DEF FT_Error
- T1_Decoder_Parse_Glyph( T1_Decoder* decoder,
- FT_UInt glyph )
- {
- return decoder->parse_callback( decoder, glyph );
- }
-
-
- FT_LOCAL_DEF FT_Error
- T1_Decoder_Init( T1_Decoder* decoder,
- FT_Face face,
- FT_Size size,
- FT_GlyphSlot slot,
- FT_Byte** glyph_names,
- T1_Blend* blend,
- T1_Decoder_Callback parse_callback )
- {
- MEM_Set( decoder, 0, sizeof ( *decoder ) );
-
- /* retrieve PSNames interface from list of current modules */
- {
- PSNames_Interface* psnames = 0;
-
-
- psnames = (PSNames_Interface*)FT_Get_Module_Interface(
- FT_FACE_LIBRARY(face), "psnames" );
- if ( !psnames )
- {
- FT_ERROR(( "T1_Decoder_Init: " ));
- FT_ERROR(( "the `psnames' module is not available\n" ));
- return PSaux_Err_Unimplemented_Feature;
- }
-
- decoder->psnames = psnames;
- }
- T1_Builder_Init( &decoder->builder, face, size, slot );
-
- decoder->num_glyphs = face->num_glyphs;
- decoder->glyph_names = glyph_names;
- decoder->blend = blend;
- decoder->parse_callback = parse_callback;
-
- decoder->funcs = t1_decoder_funcs;
-
- return 0;
- }
-
-
- FT_LOCAL_DEF void
- T1_Decoder_Done( T1_Decoder* decoder )
- {
- T1_Builder_Done( &decoder->builder );
- }
-
-
-/* END */
projects / rrdtool.git / blobdiff