/***************************************************************************//* *//* t1decode.c *//* *//* PostScript Type 1 decoding routines (body). *//* *//* Copyright 2000-2001, 2002 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_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_Service 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 = 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; 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; #if 0 n_base_points = base->n_points;#endif /* 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; /* XXX: old code doesn't work with PostScript hinter */#if 0 /* 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 ); }#else decoder->builder.pos_x = 0; decoder->builder.pos_y = 0;#endif 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; 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->path_begun = 0; hinter = (T1_Hints_Funcs)builder->hints_funcs; 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; /*********************************************************************/ /* */ /* 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_none; 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 )Lines 1–500 of 1170. Load more
/***************************************************************************/ /* */ /* t1decode.c */ /* */ /* PostScript Type 1 decoding routines (body). */ /* */ /* Copyright 2000-2001, 2002 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_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_Service 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 = 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; 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; #if 0 n_base_points = base->n_points; #endif /* 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; /* XXX: old code doesn't work with PostScript hinter */ #if 0 /* 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 ); } #else decoder->builder.pos_x = 0; decoder->builder.pos_y = 0; #endif 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; 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->path_begun = 0; hinter = (T1_Hints_Funcs)builder->hints_funcs; 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; /*********************************************************************/ /* */ /* 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_none; 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 )