--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libfreetype/src/type42/t42parse.c Mon Apr 25 01:46:54 2011 +0200
@@ -0,0 +1,1187 @@
+/***************************************************************************/
+/* */
+/* t42parse.c */
+/* */
+/* Type 42 font parser (body). */
+/* */
+/* Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 by */
+/* Roberto Alameda. */
+/* */
+/* 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 "t42parse.h"
+#include "t42error.h"
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_STREAM_H
+#include FT_INTERNAL_POSTSCRIPT_AUX_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_t42
+
+
+ static void
+ t42_parse_font_matrix( T42_Face face,
+ T42_Loader loader );
+ static void
+ t42_parse_encoding( T42_Face face,
+ T42_Loader loader );
+
+ static void
+ t42_parse_charstrings( T42_Face face,
+ T42_Loader loader );
+
+ static void
+ t42_parse_sfnts( T42_Face face,
+ T42_Loader loader );
+
+
+ /* as Type42 fonts have no Private dict, */
+ /* we set the last argument of T1_FIELD_XXX to 0 */
+ static const
+ T1_FieldRec t42_keywords[] =
+ {
+
+#undef FT_STRUCTURE
+#define FT_STRUCTURE T1_FontInfo
+#undef T1CODE
+#define T1CODE T1_FIELD_LOCATION_FONT_INFO
+
+ T1_FIELD_STRING( "version", version, 0 )
+ T1_FIELD_STRING( "Notice", notice, 0 )
+ T1_FIELD_STRING( "FullName", full_name, 0 )
+ T1_FIELD_STRING( "FamilyName", family_name, 0 )
+ T1_FIELD_STRING( "Weight", weight, 0 )
+ T1_FIELD_NUM ( "ItalicAngle", italic_angle, 0 )
+ T1_FIELD_BOOL ( "isFixedPitch", is_fixed_pitch, 0 )
+ T1_FIELD_NUM ( "UnderlinePosition", underline_position, 0 )
+ T1_FIELD_NUM ( "UnderlineThickness", underline_thickness, 0 )
+
+#undef FT_STRUCTURE
+#define FT_STRUCTURE PS_FontExtraRec
+#undef T1CODE
+#define T1CODE T1_FIELD_LOCATION_FONT_EXTRA
+
+ T1_FIELD_NUM ( "FSType", fs_type, 0 )
+
+#undef FT_STRUCTURE
+#define FT_STRUCTURE T1_FontRec
+#undef T1CODE
+#define T1CODE T1_FIELD_LOCATION_FONT_DICT
+
+ T1_FIELD_KEY ( "FontName", font_name, 0 )
+ T1_FIELD_NUM ( "PaintType", paint_type, 0 )
+ T1_FIELD_NUM ( "FontType", font_type, 0 )
+ T1_FIELD_FIXED( "StrokeWidth", stroke_width, 0 )
+
+#undef FT_STRUCTURE
+#define FT_STRUCTURE FT_BBox
+#undef T1CODE
+#define T1CODE T1_FIELD_LOCATION_BBOX
+
+ T1_FIELD_BBOX("FontBBox", xMin, 0 )
+
+ T1_FIELD_CALLBACK( "FontMatrix", t42_parse_font_matrix, 0 )
+ T1_FIELD_CALLBACK( "Encoding", t42_parse_encoding, 0 )
+ T1_FIELD_CALLBACK( "CharStrings", t42_parse_charstrings, 0 )
+ T1_FIELD_CALLBACK( "sfnts", t42_parse_sfnts, 0 )
+
+ { 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0, 0 }
+ };
+
+
+#define T1_Add_Table( p, i, o, l ) (p)->funcs.add( (p), i, o, l )
+#define T1_Done_Table( p ) \
+ do \
+ { \
+ if ( (p)->funcs.done ) \
+ (p)->funcs.done( p ); \
+ } while ( 0 )
+#define T1_Release_Table( p ) \
+ do \
+ { \
+ if ( (p)->funcs.release ) \
+ (p)->funcs.release( p ); \
+ } while ( 0 )
+
+#define T1_Skip_Spaces( p ) (p)->root.funcs.skip_spaces( &(p)->root )
+#define T1_Skip_PS_Token( p ) (p)->root.funcs.skip_PS_token( &(p)->root )
+
+#define T1_ToInt( p ) \
+ (p)->root.funcs.to_int( &(p)->root )
+#define T1_ToBytes( p, b, m, n, d ) \
+ (p)->root.funcs.to_bytes( &(p)->root, b, m, n, d )
+
+#define T1_ToFixedArray( p, m, f, t ) \
+ (p)->root.funcs.to_fixed_array( &(p)->root, m, f, t )
+#define T1_ToToken( p, t ) \
+ (p)->root.funcs.to_token( &(p)->root, t )
+
+#define T1_Load_Field( p, f, o, m, pf ) \
+ (p)->root.funcs.load_field( &(p)->root, f, o, m, pf )
+#define T1_Load_Field_Table( p, f, o, m, pf ) \
+ (p)->root.funcs.load_field_table( &(p)->root, f, o, m, pf )
+
+
+ /********************* Parsing Functions ******************/
+
+ FT_LOCAL_DEF( FT_Error )
+ t42_parser_init( T42_Parser parser,
+ FT_Stream stream,
+ FT_Memory memory,
+ PSAux_Service psaux )
+ {
+ FT_Error error = T42_Err_Ok;
+ FT_Long size;
+
+
+ psaux->ps_parser_funcs->init( &parser->root, 0, 0, memory );
+
+ parser->stream = stream;
+ parser->base_len = 0;
+ parser->base_dict = 0;
+ parser->in_memory = 0;
+
+ /*******************************************************************/
+ /* */
+ /* Here a short summary of what is going on: */
+ /* */
+ /* When creating a new Type 42 parser, we try to locate and load */
+ /* the base dictionary, loading the whole font into memory. */
+ /* */
+ /* When `loading' the base dictionary, we only set up pointers */
+ /* in the case of a memory-based stream. Otherwise, we allocate */
+ /* and load the base dictionary in it. */
+ /* */
+ /* parser->in_memory is set if we have a memory stream. */
+ /* */
+
+ if ( FT_STREAM_SEEK( 0L ) ||
+ FT_FRAME_ENTER( 17 ) )
+ goto Exit;
+
+ if ( ft_memcmp( stream->cursor, "%!PS-TrueTypeFont", 17 ) != 0 )
+ {
+ FT_TRACE2(( "not a Type42 font\n" ));
+ error = T42_Err_Unknown_File_Format;
+ }
+
+ FT_FRAME_EXIT();
+
+ if ( error || FT_STREAM_SEEK( 0 ) )
+ goto Exit;
+
+ size = stream->size;
+
+ /* now, try to load `size' bytes of the `base' dictionary we */
+ /* found previously */
+
+ /* if it is a memory-based resource, set up pointers */
+ if ( !stream->read )
+ {
+ parser->base_dict = (FT_Byte*)stream->base + stream->pos;
+ parser->base_len = size;
+ parser->in_memory = 1;
+
+ /* check that the `size' field is valid */
+ if ( FT_STREAM_SKIP( size ) )
+ goto Exit;
+ }
+ else
+ {
+ /* read segment in memory */
+ if ( FT_ALLOC( parser->base_dict, size ) ||
+ FT_STREAM_READ( parser->base_dict, size ) )
+ goto Exit;
+
+ parser->base_len = size;
+ }
+
+ parser->root.base = parser->base_dict;
+ parser->root.cursor = parser->base_dict;
+ parser->root.limit = parser->root.cursor + parser->base_len;
+
+ Exit:
+ if ( error && !parser->in_memory )
+ FT_FREE( parser->base_dict );
+
+ return error;
+ }
+
+
+ FT_LOCAL_DEF( void )
+ t42_parser_done( T42_Parser parser )
+ {
+ FT_Memory memory = parser->root.memory;
+
+
+ /* free the base dictionary only when we have a disk stream */
+ if ( !parser->in_memory )
+ FT_FREE( parser->base_dict );
+
+ parser->root.funcs.done( &parser->root );
+ }
+
+
+ static int
+ t42_is_space( FT_Byte c )
+ {
+ return ( c == ' ' || c == '\t' ||
+ c == '\r' || c == '\n' || c == '\f' ||
+ c == '\0' );
+ }
+
+
+ static void
+ t42_parse_font_matrix( T42_Face face,
+ T42_Loader loader )
+ {
+ T42_Parser parser = &loader->parser;
+ FT_Matrix* matrix = &face->type1.font_matrix;
+ FT_Vector* offset = &face->type1.font_offset;
+ FT_Face root = (FT_Face)&face->root;
+ FT_Fixed temp[6];
+ FT_Fixed temp_scale;
+
+
+ (void)T1_ToFixedArray( parser, 6, temp, 3 );
+
+ temp_scale = FT_ABS( temp[3] );
+
+ /* Set Units per EM based on FontMatrix values. We set the value to */
+ /* 1000 / temp_scale, because temp_scale was already multiplied by */
+ /* 1000 (in t1_tofixed, from psobjs.c). */
+
+ root->units_per_EM = (FT_UShort)( FT_DivFix( 1000 * 0x10000L,
+ temp_scale ) >> 16 );
+
+ /* we need to scale the values by 1.0/temp_scale */
+ if ( temp_scale != 0x10000L )
+ {
+ temp[0] = FT_DivFix( temp[0], temp_scale );
+ temp[1] = FT_DivFix( temp[1], temp_scale );
+ temp[2] = FT_DivFix( temp[2], temp_scale );
+ temp[4] = FT_DivFix( temp[4], temp_scale );
+ temp[5] = FT_DivFix( temp[5], temp_scale );
+ temp[3] = 0x10000L;
+ }
+
+ matrix->xx = temp[0];
+ matrix->yx = temp[1];
+ matrix->xy = temp[2];
+ matrix->yy = temp[3];
+
+ /* note that the offsets must be expressed in integer font units */
+ offset->x = temp[4] >> 16;
+ offset->y = temp[5] >> 16;
+ }
+
+
+ static void
+ t42_parse_encoding( T42_Face face,
+ T42_Loader loader )
+ {
+ T42_Parser parser = &loader->parser;
+ FT_Byte* cur;
+ FT_Byte* limit = parser->root.limit;
+
+ PSAux_Service psaux = (PSAux_Service)face->psaux;
+
+
+ T1_Skip_Spaces( parser );
+ cur = parser->root.cursor;
+ if ( cur >= limit )
+ {
+ FT_ERROR(( "t42_parse_encoding: out of bounds\n" ));
+ parser->root.error = T42_Err_Invalid_File_Format;
+ return;
+ }
+
+ /* if we have a number or `[', the encoding is an array, */
+ /* and we must load it now */
+ if ( ft_isdigit( *cur ) || *cur == '[' )
+ {
+ T1_Encoding encode = &face->type1.encoding;
+ FT_UInt count, n;
+ PS_Table char_table = &loader->encoding_table;
+ FT_Memory memory = parser->root.memory;
+ FT_Error error;
+ FT_Bool only_immediates = 0;
+
+
+ /* read the number of entries in the encoding; should be 256 */
+ if ( *cur == '[' )
+ {
+ count = 256;
+ only_immediates = 1;
+ parser->root.cursor++;
+ }
+ else
+ count = (FT_UInt)T1_ToInt( parser );
+
+ T1_Skip_Spaces( parser );
+ if ( parser->root.cursor >= limit )
+ return;
+
+ /* we use a T1_Table to store our charnames */
+ loader->num_chars = encode->num_chars = count;
+ if ( FT_NEW_ARRAY( encode->char_index, count ) ||
+ FT_NEW_ARRAY( encode->char_name, count ) ||
+ FT_SET_ERROR( psaux->ps_table_funcs->init(
+ char_table, count, memory ) ) )
+ {
+ parser->root.error = error;
+ return;
+ }
+
+ /* We need to `zero' out encoding_table.elements */
+ for ( n = 0; n < count; n++ )
+ {
+ char* notdef = (char *)".notdef";
+
+
+ T1_Add_Table( char_table, n, notdef, 8 );
+ }
+
+ /* Now we need to read records of the form */
+ /* */
+ /* ... charcode /charname ... */
+ /* */
+ /* for each entry in our table. */
+ /* */
+ /* We simply look for a number followed by an immediate */
+ /* name. Note that this ignores correctly the sequence */
+ /* that is often seen in type42 fonts: */
+ /* */
+ /* 0 1 255 { 1 index exch /.notdef put } for dup */
+ /* */
+ /* used to clean the encoding array before anything else. */
+ /* */
+ /* Alternatively, if the array is directly given as */
+ /* */
+ /* /Encoding [ ... ] */
+ /* */
+ /* we only read immediates. */
+
+ n = 0;
+ T1_Skip_Spaces( parser );
+
+ while ( parser->root.cursor < limit )
+ {
+ cur = parser->root.cursor;
+
+ /* we stop when we encounter `def' or `]' */
+ if ( *cur == 'd' && cur + 3 < limit )
+ {
+ if ( cur[1] == 'e' &&
+ cur[2] == 'f' &&
+ t42_is_space( cur[3] ) )
+ {
+ FT_TRACE6(( "encoding end\n" ));
+ cur += 3;
+ break;
+ }
+ }
+ if ( *cur == ']' )
+ {
+ FT_TRACE6(( "encoding end\n" ));
+ cur++;
+ break;
+ }
+
+ /* check whether we have found an entry */
+ if ( ft_isdigit( *cur ) || only_immediates )
+ {
+ FT_Int charcode;
+
+
+ if ( only_immediates )
+ charcode = n;
+ else
+ {
+ charcode = (FT_Int)T1_ToInt( parser );
+ T1_Skip_Spaces( parser );
+ }
+
+ cur = parser->root.cursor;
+
+ if ( *cur == '/' && cur + 2 < limit && n < count )
+ {
+ FT_PtrDist len;
+
+
+ cur++;
+
+ parser->root.cursor = cur;
+ T1_Skip_PS_Token( parser );
+ if ( parser->root.error )
+ return;
+
+ len = parser->root.cursor - cur;
+
+ parser->root.error = T1_Add_Table( char_table, charcode,
+ cur, len + 1 );
+ if ( parser->root.error )
+ return;
+ char_table->elements[charcode][len] = '\0';
+
+ n++;
+ }
+ }
+ else
+ {
+ T1_Skip_PS_Token( parser );
+ if ( parser->root.error )
+ return;
+ }
+
+ T1_Skip_Spaces( parser );
+ }
+
+ face->type1.encoding_type = T1_ENCODING_TYPE_ARRAY;
+ parser->root.cursor = cur;
+ }
+
+ /* Otherwise, we should have either `StandardEncoding', */
+ /* `ExpertEncoding', or `ISOLatin1Encoding' */
+ else
+ {
+ if ( cur + 17 < limit &&
+ ft_strncmp( (const char*)cur, "StandardEncoding", 16 ) == 0 )
+ face->type1.encoding_type = T1_ENCODING_TYPE_STANDARD;
+
+ else if ( cur + 15 < limit &&
+ ft_strncmp( (const char*)cur, "ExpertEncoding", 14 ) == 0 )
+ face->type1.encoding_type = T1_ENCODING_TYPE_EXPERT;
+
+ else if ( cur + 18 < limit &&
+ ft_strncmp( (const char*)cur, "ISOLatin1Encoding", 17 ) == 0 )
+ face->type1.encoding_type = T1_ENCODING_TYPE_ISOLATIN1;
+
+ else
+ {
+ FT_ERROR(( "t42_parse_encoding: invalid token\n" ));
+ parser->root.error = T42_Err_Invalid_File_Format;
+ }
+ }
+ }
+
+
+ typedef enum T42_Load_Status_
+ {
+ BEFORE_START,
+ BEFORE_TABLE_DIR,
+ OTHER_TABLES
+
+ } T42_Load_Status;
+
+
+ static void
+ t42_parse_sfnts( T42_Face face,
+ T42_Loader loader )
+ {
+ T42_Parser parser = &loader->parser;
+ FT_Memory memory = parser->root.memory;
+ FT_Byte* cur;
+ FT_Byte* limit = parser->root.limit;
+ FT_Error error;
+ FT_Int num_tables = 0;
+ FT_ULong count, ttf_size = 0;
+
+ FT_Long n, string_size, old_string_size, real_size;
+ FT_Byte* string_buf = NULL;
+ FT_Bool allocated = 0;
+
+ T42_Load_Status status;
+
+
+ /* The format is */
+ /* */
+ /* /sfnts [ <hexstring> <hexstring> ... ] def */
+ /* */
+ /* or */
+ /* */
+ /* /sfnts [ */
+ /* <num_bin_bytes> RD <binary data> */
+ /* <num_bin_bytes> RD <binary data> */
+ /* ... */
+ /* ] def */
+ /* */
+ /* with exactly one space after the `RD' token. */
+
+ T1_Skip_Spaces( parser );
+
+ if ( parser->root.cursor >= limit || *parser->root.cursor++ != '[' )
+ {
+ FT_ERROR(( "t42_parse_sfnts: can't find begin of sfnts vector\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+
+ T1_Skip_Spaces( parser );
+ status = BEFORE_START;
+ string_size = 0;
+ old_string_size = 0;
+ count = 0;
+
+ while ( parser->root.cursor < limit )
+ {
+ cur = parser->root.cursor;
+
+ if ( *cur == ']' )
+ {
+ parser->root.cursor++;
+ goto Exit;
+ }
+
+ else if ( *cur == '<' )
+ {
+ T1_Skip_PS_Token( parser );
+ if ( parser->root.error )
+ goto Exit;
+
+ /* don't include delimiters */
+ string_size = (FT_Long)( ( parser->root.cursor - cur - 2 + 1 ) / 2 );
+ if ( FT_REALLOC( string_buf, old_string_size, string_size ) )
+ goto Fail;
+
+ allocated = 1;
+
+ parser->root.cursor = cur;
+ (void)T1_ToBytes( parser, string_buf, string_size, &real_size, 1 );
+ old_string_size = string_size;
+ string_size = real_size;
+ }
+
+ else if ( ft_isdigit( *cur ) )
+ {
+ if ( allocated )
+ {
+ FT_ERROR(( "t42_parse_sfnts: "
+ "can't handle mixed binary and hex strings\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+
+ string_size = T1_ToInt( parser );
+ if ( string_size < 0 )
+ {
+ FT_ERROR(( "t42_parse_sfnts: invalid string size\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+
+ T1_Skip_PS_Token( parser ); /* `RD' */
+ if ( parser->root.error )
+ return;
+
+ string_buf = parser->root.cursor + 1; /* one space after `RD' */
+
+ if ( limit - parser->root.cursor < string_size )
+ {
+ FT_ERROR(( "t42_parse_sfnts: too many binary data\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+ else
+ parser->root.cursor += string_size + 1;
+ }
+
+ if ( !string_buf )
+ {
+ FT_ERROR(( "t42_parse_sfnts: invalid data in sfnts array\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+
+ /* A string can have a trailing zero byte for padding. Ignore it. */
+ if ( string_buf[string_size - 1] == 0 && ( string_size % 2 == 1 ) )
+ string_size--;
+
+ if ( !string_size )
+ {
+ FT_ERROR(( "t42_parse_sfnts: invalid string\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+
+ for ( n = 0; n < string_size; n++ )
+ {
+ switch ( status )
+ {
+ case BEFORE_START:
+ /* load offset table, 12 bytes */
+ if ( count < 12 )
+ {
+ face->ttf_data[count++] = string_buf[n];
+ continue;
+ }
+ else
+ {
+ num_tables = 16 * face->ttf_data[4] + face->ttf_data[5];
+ status = BEFORE_TABLE_DIR;
+ ttf_size = 12 + 16 * num_tables;
+
+ if ( FT_REALLOC( face->ttf_data, 12, ttf_size ) )
+ goto Fail;
+ }
+ /* fall through */
+
+ case BEFORE_TABLE_DIR:
+ /* the offset table is read; read the table directory */
+ if ( count < ttf_size )
+ {
+ face->ttf_data[count++] = string_buf[n];
+ continue;
+ }
+ else
+ {
+ int i;
+ FT_ULong len;
+
+
+ for ( i = 0; i < num_tables; i++ )
+ {
+ FT_Byte* p = face->ttf_data + 12 + 16 * i + 12;
+
+
+ len = FT_PEEK_ULONG( p );
+
+ /* Pad to a 4-byte boundary length */
+ ttf_size += ( len + 3 ) & ~3;
+ }
+
+ status = OTHER_TABLES;
+ face->ttf_size = ttf_size;
+
+ /* there are no more than 256 tables, so no size check here */
+ if ( FT_REALLOC( face->ttf_data, 12 + 16 * num_tables,
+ ttf_size + 1 ) )
+ goto Fail;
+ }
+ /* fall through */
+
+ case OTHER_TABLES:
+ /* all other tables are just copied */
+ if ( count >= ttf_size )
+ {
+ FT_ERROR(( "t42_parse_sfnts: too many binary data\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+ face->ttf_data[count++] = string_buf[n];
+ }
+ }
+
+ T1_Skip_Spaces( parser );
+ }
+
+ /* if control reaches this point, the format was not valid */
+ error = T42_Err_Invalid_File_Format;
+
+ Fail:
+ parser->root.error = error;
+
+ Exit:
+ if ( allocated )
+ FT_FREE( string_buf );
+ }
+
+
+ static void
+ t42_parse_charstrings( T42_Face face,
+ T42_Loader loader )
+ {
+ T42_Parser parser = &loader->parser;
+ PS_Table code_table = &loader->charstrings;
+ PS_Table name_table = &loader->glyph_names;
+ PS_Table swap_table = &loader->swap_table;
+ FT_Memory memory = parser->root.memory;
+ FT_Error error;
+
+ PSAux_Service psaux = (PSAux_Service)face->psaux;
+
+ FT_Byte* cur;
+ FT_Byte* limit = parser->root.limit;
+ FT_UInt n;
+ FT_UInt notdef_index = 0;
+ FT_Byte notdef_found = 0;
+
+
+ T1_Skip_Spaces( parser );
+
+ if ( parser->root.cursor >= limit )
+ {
+ FT_ERROR(( "t42_parse_charstrings: out of bounds\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+
+ if ( ft_isdigit( *parser->root.cursor ) )
+ {
+ loader->num_glyphs = (FT_UInt)T1_ToInt( parser );
+ if ( parser->root.error )
+ return;
+ }
+ else if ( *parser->root.cursor == '<' )
+ {
+ /* We have `<< ... >>'. Count the number of `/' in the dictionary */
+ /* to get its size. */
+ FT_UInt count = 0;
+
+
+ T1_Skip_PS_Token( parser );
+ if ( parser->root.error )
+ return;
+ T1_Skip_Spaces( parser );
+ cur = parser->root.cursor;
+
+ while ( parser->root.cursor < limit )
+ {
+ if ( *parser->root.cursor == '/' )
+ count++;
+ else if ( *parser->root.cursor == '>' )
+ {
+ loader->num_glyphs = count;
+ parser->root.cursor = cur; /* rewind */
+ break;
+ }
+ T1_Skip_PS_Token( parser );
+ if ( parser->root.error )
+ return;
+ T1_Skip_Spaces( parser );
+ }
+ }
+ else
+ {
+ FT_ERROR(( "t42_parse_charstrings: invalid token\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+
+ if ( parser->root.cursor >= limit )
+ {
+ FT_ERROR(( "t42_parse_charstrings: out of bounds\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+
+ /* initialize tables */
+
+ error = psaux->ps_table_funcs->init( code_table,
+ loader->num_glyphs,
+ memory );
+ if ( error )
+ goto Fail;
+
+ error = psaux->ps_table_funcs->init( name_table,
+ loader->num_glyphs,
+ memory );
+ if ( error )
+ goto Fail;
+
+ /* Initialize table for swapping index notdef_index and */
+ /* index 0 names and codes (if necessary). */
+
+ error = psaux->ps_table_funcs->init( swap_table, 4, memory );
+ if ( error )
+ goto Fail;
+
+ n = 0;
+
+ for (;;)
+ {
+ /* The format is simple: */
+ /* `/glyphname' + index [+ def] */
+
+ T1_Skip_Spaces( parser );
+
+ cur = parser->root.cursor;
+ if ( cur >= limit )
+ break;
+
+ /* We stop when we find an `end' keyword or '>' */
+ if ( *cur == 'e' &&
+ cur + 3 < limit &&
+ cur[1] == 'n' &&
+ cur[2] == 'd' &&
+ t42_is_space( cur[3] ) )
+ break;
+ if ( *cur == '>' )
+ break;
+
+ T1_Skip_PS_Token( parser );
+ if ( parser->root.error )
+ return;
+
+ if ( *cur == '/' )
+ {
+ FT_PtrDist len;
+
+
+ if ( cur + 1 >= limit )
+ {
+ FT_ERROR(( "t42_parse_charstrings: out of bounds\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+
+ cur++; /* skip `/' */
+ len = parser->root.cursor - cur;
+
+ error = T1_Add_Table( name_table, n, cur, len + 1 );
+ if ( error )
+ goto Fail;
+
+ /* add a trailing zero to the name table */
+ name_table->elements[n][len] = '\0';
+
+ /* record index of /.notdef */
+ if ( *cur == '.' &&
+ ft_strcmp( ".notdef",
+ (const char*)(name_table->elements[n]) ) == 0 )
+ {
+ notdef_index = n;
+ notdef_found = 1;
+ }
+
+ T1_Skip_Spaces( parser );
+
+ cur = parser->root.cursor;
+
+ (void)T1_ToInt( parser );
+ if ( parser->root.cursor >= limit )
+ {
+ FT_ERROR(( "t42_parse_charstrings: out of bounds\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+
+ len = parser->root.cursor - cur;
+
+ error = T1_Add_Table( code_table, n, cur, len + 1 );
+ if ( error )
+ goto Fail;
+
+ code_table->elements[n][len] = '\0';
+
+ n++;
+ if ( n >= loader->num_glyphs )
+ break;
+ }
+ }
+
+ loader->num_glyphs = n;
+
+ if ( !notdef_found )
+ {
+ FT_ERROR(( "t42_parse_charstrings: no /.notdef glyph\n" ));
+ error = T42_Err_Invalid_File_Format;
+ goto Fail;
+ }
+
+ /* if /.notdef does not occupy index 0, do our magic. */
+ if ( ft_strcmp( (const char*)".notdef",
+ (const char*)name_table->elements[0] ) )
+ {
+ /* Swap glyph in index 0 with /.notdef glyph. First, add index 0 */
+ /* name and code entries to swap_table. Then place notdef_index */
+ /* name and code entries into swap_table. Then swap name and code */
+ /* entries at indices notdef_index and 0 using values stored in */
+ /* swap_table. */
+
+ /* Index 0 name */
+ error = T1_Add_Table( swap_table, 0,
+ name_table->elements[0],
+ name_table->lengths [0] );
+ if ( error )
+ goto Fail;
+
+ /* Index 0 code */
+ error = T1_Add_Table( swap_table, 1,
+ code_table->elements[0],
+ code_table->lengths [0] );
+ if ( error )
+ goto Fail;
+
+ /* Index notdef_index name */
+ error = T1_Add_Table( swap_table, 2,
+ name_table->elements[notdef_index],
+ name_table->lengths [notdef_index] );
+ if ( error )
+ goto Fail;
+
+ /* Index notdef_index code */
+ error = T1_Add_Table( swap_table, 3,
+ code_table->elements[notdef_index],
+ code_table->lengths [notdef_index] );
+ if ( error )
+ goto Fail;
+
+ error = T1_Add_Table( name_table, notdef_index,
+ swap_table->elements[0],
+ swap_table->lengths [0] );
+ if ( error )
+ goto Fail;
+
+ error = T1_Add_Table( code_table, notdef_index,
+ swap_table->elements[1],
+ swap_table->lengths [1] );
+ if ( error )
+ goto Fail;
+
+ error = T1_Add_Table( name_table, 0,
+ swap_table->elements[2],
+ swap_table->lengths [2] );
+ if ( error )
+ goto Fail;
+
+ error = T1_Add_Table( code_table, 0,
+ swap_table->elements[3],
+ swap_table->lengths [3] );
+ if ( error )
+ goto Fail;
+
+ }
+
+ return;
+
+ Fail:
+ parser->root.error = error;
+ }
+
+
+ static FT_Error
+ t42_load_keyword( T42_Face face,
+ T42_Loader loader,
+ T1_Field field )
+ {
+ FT_Error error;
+ void* dummy_object;
+ void** objects;
+ FT_UInt max_objects = 0;
+
+
+ /* if the keyword has a dedicated callback, call it */
+ if ( field->type == T1_FIELD_TYPE_CALLBACK )
+ {
+ field->reader( (FT_Face)face, loader );
+ error = loader->parser.root.error;
+ goto Exit;
+ }
+
+ /* now the keyword is either a simple field or a table of fields; */
+ /* we are now going to take care of it */
+
+ switch ( field->location )
+ {
+ case T1_FIELD_LOCATION_FONT_INFO:
+ dummy_object = &face->type1.font_info;
+ break;
+
+ case T1_FIELD_LOCATION_FONT_EXTRA:
+ dummy_object = &face->type1.font_extra;
+ break;
+
+ case T1_FIELD_LOCATION_BBOX:
+ dummy_object = &face->type1.font_bbox;
+ break;
+
+ default:
+ dummy_object = &face->type1;
+ }
+
+ objects = &dummy_object;
+
+ if ( field->type == T1_FIELD_TYPE_INTEGER_ARRAY ||
+ field->type == T1_FIELD_TYPE_FIXED_ARRAY )
+ error = T1_Load_Field_Table( &loader->parser, field,
+ objects, max_objects, 0 );
+ else
+ error = T1_Load_Field( &loader->parser, field,
+ objects, max_objects, 0 );
+
+ Exit:
+ return error;
+ }
+
+
+ FT_LOCAL_DEF( FT_Error )
+ t42_parse_dict( T42_Face face,
+ T42_Loader loader,
+ FT_Byte* base,
+ FT_Long size )
+ {
+ T42_Parser parser = &loader->parser;
+ FT_Byte* limit;
+ FT_Int n_keywords = (FT_Int)( sizeof ( t42_keywords ) /
+ sizeof ( t42_keywords[0] ) );
+
+
+ parser->root.cursor = base;
+ parser->root.limit = base + size;
+ parser->root.error = T42_Err_Ok;
+
+ limit = parser->root.limit;
+
+ T1_Skip_Spaces( parser );
+
+ while ( parser->root.cursor < limit )
+ {
+ FT_Byte* cur;
+
+
+ cur = parser->root.cursor;
+
+ /* look for `FontDirectory' which causes problems for some fonts */
+ if ( *cur == 'F' && cur + 25 < limit &&
+ ft_strncmp( (char*)cur, "FontDirectory", 13 ) == 0 )
+ {
+ FT_Byte* cur2;
+
+
+ /* skip the `FontDirectory' keyword */
+ T1_Skip_PS_Token( parser );
+ T1_Skip_Spaces ( parser );
+ cur = cur2 = parser->root.cursor;
+
+ /* look up the `known' keyword */
+ while ( cur < limit )
+ {
+ if ( *cur == 'k' && cur + 5 < limit &&
+ ft_strncmp( (char*)cur, "known", 5 ) == 0 )
+ break;
+
+ T1_Skip_PS_Token( parser );
+ if ( parser->root.error )
+ goto Exit;
+ T1_Skip_Spaces ( parser );
+ cur = parser->root.cursor;
+ }
+
+ if ( cur < limit )
+ {
+ T1_TokenRec token;
+
+
+ /* skip the `known' keyword and the token following it */
+ T1_Skip_PS_Token( parser );
+ T1_ToToken( parser, &token );
+
+ /* if the last token was an array, skip it! */
+ if ( token.type == T1_TOKEN_TYPE_ARRAY )
+ cur2 = parser->root.cursor;
+ }
+ parser->root.cursor = cur2;
+ }
+
+ /* look for immediates */
+ else if ( *cur == '/' && cur + 2 < limit )
+ {
+ FT_PtrDist len;
+
+
+ cur++;
+
+ parser->root.cursor = cur;
+ T1_Skip_PS_Token( parser );
+ if ( parser->root.error )
+ goto Exit;
+
+ len = parser->root.cursor - cur;
+
+ if ( len > 0 && len < 22 && parser->root.cursor < limit )
+ {
+ int i;
+
+
+ /* now compare the immediate name to the keyword table */
+
+ /* loop through all known keywords */
+ for ( i = 0; i < n_keywords; i++ )
+ {
+ T1_Field keyword = (T1_Field)&t42_keywords[i];
+ FT_Byte *name = (FT_Byte*)keyword->ident;
+
+
+ if ( !name )
+ continue;
+
+ if ( cur[0] == name[0] &&
+ len == (FT_PtrDist)ft_strlen( (const char *)name ) &&
+ ft_memcmp( cur, name, len ) == 0 )
+ {
+ /* we found it -- run the parsing callback! */
+ parser->root.error = t42_load_keyword( face,
+ loader,
+ keyword );
+ if ( parser->root.error )
+ return parser->root.error;
+ break;
+ }
+ }
+ }
+ }
+ else
+ {
+ T1_Skip_PS_Token( parser );
+ if ( parser->root.error )
+ goto Exit;
+ }
+
+ T1_Skip_Spaces( parser );
+ }
+
+ Exit:
+ return parser->root.error;
+ }
+
+
+ FT_LOCAL_DEF( void )
+ t42_loader_init( T42_Loader loader,
+ T42_Face face )
+ {
+ FT_UNUSED( face );
+
+ FT_MEM_ZERO( loader, sizeof ( *loader ) );
+ loader->num_glyphs = 0;
+ loader->num_chars = 0;
+
+ /* initialize the tables -- simply set their `init' field to 0 */
+ loader->encoding_table.init = 0;
+ loader->charstrings.init = 0;
+ loader->glyph_names.init = 0;
+ }
+
+
+ FT_LOCAL_DEF( void )
+ t42_loader_done( T42_Loader loader )
+ {
+ T42_Parser parser = &loader->parser;
+
+
+ /* finalize tables */
+ T1_Release_Table( &loader->encoding_table );
+ T1_Release_Table( &loader->charstrings );
+ T1_Release_Table( &loader->glyph_names );
+ T1_Release_Table( &loader->swap_table );
+
+ /* finalize parser */
+ t42_parser_done( parser );
+ }
+
+
+/* END */