summaryrefslogtreecommitdiffstats
path: root/src/3rdparty/freetype/src/psaux/t1decode.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/3rdparty/freetype/src/psaux/t1decode.c')
-rw-r--r--src/3rdparty/freetype/src/psaux/t1decode.c1475
1 files changed, 0 insertions, 1475 deletions
diff --git a/src/3rdparty/freetype/src/psaux/t1decode.c b/src/3rdparty/freetype/src/psaux/t1decode.c
deleted file mode 100644
index 550ba6414..000000000
--- a/src/3rdparty/freetype/src/psaux/t1decode.c
+++ /dev/null
@@ -1,1475 +0,0 @@
-/***************************************************************************/
-/* */
-/* t1decode.c */
-/* */
-/* PostScript Type 1 decoding routines (body). */
-/* */
-/* Copyright 2000-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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_INTERNAL_POSTSCRIPT_HINTS_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_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 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;
-
-
- /* 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_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)( adx - asb );
- subg->arg2 = (FT_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 */
-
- error = t1_decoder_parse_glyph( decoder, bchar_index );
- 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 */
- 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;
-
- 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;
-
- T1_Hints_Funcs hinter;
-
-
- /* 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->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->len_buildchar > 0 )
- memset( &decoder->buildchar[0],
- 0,
- sizeof( decoder->buildchar[0] ) *
- decoder->len_buildchar );
-
- FT_TRACE4(( "\nStart charstring\n" ));
-
- zone->base = charstring_base;
- limit = zone->limit = charstring_base + charstring_len;
- ip = zone->cursor = zone->base;
-
- error = PSaux_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 );
-
- /* now, execute loop */
- while ( ip < limit )
- {
- FT_Long* top = decoder->top;
- T1_Operator op = op_none;
- FT_Long value = 0;
-
-
- FT_ASSERT( known_othersubr_result_cnt == 0 ||
- unknown_othersubr_result_cnt == 0 );
-
- FT_TRACE5(( " (%d)", decoder->top - decoder->stack ));
-
- /*********************************************************************/
- /* */
- /* 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_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;
- }
- }
-
- 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;
- }
- }
-
- /*********************************************************************/
- /* */
- /* 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_Int subr_no;
- FT_Int arg_cnt;
-
-
- FT_TRACE4(( " callothersubr" ));
-
- if ( top - decoder->stack < 2 )
- goto Stack_Underflow;
-
- top -= 2;
-
- subr_no = (FT_Int)top[1];
- arg_cnt = (FT_Int)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 1: /* start flex feature */
- if ( arg_cnt != 0 )
- goto Unexpected_OtherSubr;
-
- decoder->flex_state = 1;
- decoder->num_flex_vectors = 0;
- if ( start_point( builder, x, y ) ||
- check_points( builder, 6 ) )
- goto Fail;
- break;
-
- case 2: /* add flex vectors */
- {
- FT_Int idx;
-
-
- if ( arg_cnt != 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 */
- idx = decoder->num_flex_vectors++;
- if ( idx > 0 && idx < 7 )
- add_point( builder,
- x,
- y,
- (FT_Byte)( idx == 3 || idx == 6 ) );
- }
- break;
-
- 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 */
- known_othersubr_result_cnt = 2;
- break;
-
- case 3: /* change hints */
- if ( arg_cnt != 1 )
- goto Unexpected_OtherSubr;
-
- known_othersubr_result_cnt = 1;
-
- if ( hinter )
- hinter->reset( hinter->hints, 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: " ));
- FT_ERROR(( "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: " ));
- FT_ERROR(( "incorrect number of mm arguments\n" ));
- goto Syntax_Error;
- }
-
- /* 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_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 = num_points;
- break;
- }
-
-#ifdef CAN_HANDLE_NON_INTEGRAL_T1_OPERANDS
-
- /* We cannot yet enable these since currently */
- /* our T1 stack stores integers which lack the */
- /* precision to express the values */
-
- 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 = top[0];
-
- if ( idx < 0 ||
- idx + blend->num_designs > decoder->face->len_buildchar )
- goto Unexpected_OtherSubr;
-
- 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] *= top[1]; /* XXX (over|under)flow */
-
- 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] /= top[1]; /* XXX (over|under)flow */
-
- known_othersubr_result_cnt = 1;
- break;
-
-#endif /* CAN_HANDLE_NON_INTEGRAL_T1_OPERANDS */
-
- 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 = 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 = 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 who has left his 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;
-
-#ifdef CAN_HANDLE_NON_INTEGRAL_T1_OPERANDS
- case 28:
- /* 0 28 callothersubr pop */
- /* => push random value from interval [0, 1) onto stack */
- if ( arg_cnt != 0 )
- goto Unexpected_OtherSubr;
-
- top[0] = FT_rand();
- known_othersubr_result_cnt = 1;
- break;
-#endif
-
- default:
- 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;
-
- 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" ));
-
- close_contour( builder );
-
- /* close hints recording session */
- if ( hinter )
- {
- if (hinter->close( hinter->hints, builder->current->n_points ))
- goto Syntax_Error;
-
- /* apply hints to the loaded glyph outline now */
- hinter->apply( hinter->hints,
- builder->current,
- (PSH_Globals) builder->hints_globals,
- decoder->hint_mode );
- }
-
- /* add current outline to the glyph slot */
- FT_GlyphLoader_Add( builder->loader );
-
- FT_TRACE4(( "\n" ));
-
- /* 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 PSaux_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 = builder->last.x = x = builder->pos_x + top[0];
- orig_y = builder->last.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 PSaux_Err_Ok;
-
- break;
-
- case op_seac:
- /* return immediately after the processing */
- return t1operator_seac( decoder, top[0], top[1], top[2],
- (FT_Int)top[3], (FT_Int)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];
-
- builder->last.x = x = builder->pos_x + top[0];
- builder->last.y = 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 PSaux_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 )
- close_contour( builder );
-
- builder->parse_state = T1_Parse_Have_Width;
- break;
-
- case op_hlineto:
- FT_TRACE4(( " hlineto" ));
-
- if ( start_point( builder, x, y ) )
- 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 ( start_point( builder, x, y ) ||
- check_points( builder, 3 ) )
- goto Fail;
-
- 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 Fail;
-
- x += top[0];
- y += top[1];
-
- Add_Line:
- if ( add_point1( builder, x, y ) )
- 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(( " rcurveto" ));
-
- if ( start_point( builder, x, y ) ||
- check_points( builder, 3 ) )
- goto Fail;
-
- 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 Fail;
-
- 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 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 ( 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 idx;
-
-
- FT_TRACE4(( " callsubr" ));
-
- idx = (FT_Int)top[0];
- if ( idx < 0 || idx >= (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[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 specs, 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 */
- if ( decoder->flex_state != 1 )
- {
- FT_ERROR(( "t1_decoder_parse_charstrings: " ));
- FT_ERROR(( "unexpected `setcurrentpoint'\n" ));
-
- goto Syntax_Error;
- }
- else
- 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;
-
- } /* general operator processing */
-
- } /* while ip < limit */
-
- FT_TRACE4(( "..end..\n\n" ));
-
- Fail:
- return error;
-
- Syntax_Error:
- return PSaux_Err_Syntax_Error;
-
- Stack_Underflow:
- return PSaux_Err_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 = 0;
-
-
- FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
- 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, 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 PSaux_Err_Ok;
- }
-
-
- /* finalize T1 decoder */
- FT_LOCAL_DEF( void )
- t1_decoder_done( T1_Decoder decoder )
- {
- t1_builder_done( &decoder->builder );
- }
-
-
-/* END */
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-31 07:34:52 +0000