| /***************************************************************************/ |
| /* */ |
| /* ttload.c */ |
| /* */ |
| /* Load the basic TrueType tables, i.e., tables that can be either in */ |
| /* TTF or OTF fonts (body). */ |
| /* */ |
| /* Copyright 1996-2001, 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_STREAM_H |
| #include FT_TRUETYPE_TAGS_H |
| #include "ttload.h" |
| #include "ttcmap.h" |
| |
| #include "sferrors.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_ttload |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_LookUp_Table */ |
| /* */ |
| /* <Description> */ |
| /* Looks for a TrueType table by name. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A face object handle. */ |
| /* */ |
| /* tag :: The searched tag. */ |
| /* */ |
| /* <Return> */ |
| /* A pointer to the table directory entry. 0 if not found. */ |
| /* */ |
| FT_LOCAL_DEF( TT_Table ) |
| TT_LookUp_Table( TT_Face face, |
| FT_ULong tag ) |
| { |
| TT_Table entry; |
| TT_Table limit; |
| |
| |
| FT_TRACE3(( "TT_LookUp_Table: %08p, `%c%c%c%c' -- ", |
| face, |
| (FT_Char)( tag >> 24 ), |
| (FT_Char)( tag >> 16 ), |
| (FT_Char)( tag >> 8 ), |
| (FT_Char)( tag ) )); |
| |
| entry = face->dir_tables; |
| limit = entry + face->num_tables; |
| |
| for ( ; entry < limit; entry++ ) |
| { |
| /* For compatibility with Windows, we consider 0-length */ |
| /* tables the same as missing tables. */ |
| if ( entry->Tag == tag && entry->Length != 0 ) |
| { |
| FT_TRACE3(( "found table.\n" )); |
| return entry; |
| } |
| } |
| |
| FT_TRACE3(( "could not find table!\n" )); |
| return 0; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Goto_Table */ |
| /* */ |
| /* <Description> */ |
| /* Looks for a TrueType table by name, then seek a stream to it. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A face object handle. */ |
| /* */ |
| /* tag :: The searched tag. */ |
| /* */ |
| /* stream :: The stream to seek when the table is found. */ |
| /* */ |
| /* <Output> */ |
| /* length :: The length of the table if found, undefined otherwise. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Goto_Table( TT_Face face, |
| FT_ULong tag, |
| FT_Stream stream, |
| FT_ULong* length ) |
| { |
| TT_Table table; |
| FT_Error error; |
| |
| |
| table = TT_LookUp_Table( face, tag ); |
| if ( table ) |
| { |
| if ( length ) |
| *length = table->Length; |
| |
| if ( FT_STREAM_SEEK( table->Offset ) ) |
| goto Exit; |
| } |
| else |
| error = SFNT_Err_Table_Missing; |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_SFNT_HeaderRec */ |
| /* */ |
| /* <Description> */ |
| /* Loads the header of a SFNT font file. Supports collections. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* face_index :: If the font is a collection, the number of the font */ |
| /* in the collection, ignored otherwise. */ |
| /* */ |
| /* <Output> */ |
| /* sfnt :: The SFNT header. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| /* <Note> */ |
| /* The stream cursor must be at the font file's origin. */ |
| /* */ |
| /* This function recognizes fonts embedded in a `TrueType collection' */ |
| /* */ |
| /* The header will be checked whether it is valid by looking at the */ |
| /* values of `search_range', `entry_selector', and `range_shift'. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_SFNT_HeaderRec( TT_Face face, |
| FT_Stream stream, |
| FT_Long face_index, |
| SFNT_Header sfnt ) |
| { |
| FT_Error error; |
| FT_ULong format_tag; |
| FT_Memory memory = stream->memory; |
| |
| const FT_Frame_Field sfnt_header_fields[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE SFNT_HeaderRec |
| |
| FT_FRAME_START( 8 ), |
| FT_FRAME_USHORT( num_tables ), |
| FT_FRAME_USHORT( search_range ), |
| FT_FRAME_USHORT( entry_selector ), |
| FT_FRAME_USHORT( range_shift ), |
| FT_FRAME_END |
| }; |
| |
| const FT_Frame_Field ttc_header_fields[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE TTC_HeaderRec |
| |
| FT_FRAME_START( 8 ), |
| FT_FRAME_LONG( version ), |
| FT_FRAME_LONG( count ), |
| FT_FRAME_END |
| }; |
| |
| |
| FT_TRACE2(( "TT_Load_SFNT_HeaderRec: %08p, %ld\n", |
| face, face_index )); |
| |
| face->ttc_header.tag = 0; |
| face->ttc_header.version = 0; |
| face->ttc_header.count = 0; |
| |
| face->num_tables = 0; |
| |
| /* first of all, read the first 4 bytes. If it is `ttcf', then the */ |
| /* file is a TrueType collection, otherwise it can be any other */ |
| /* kind of font. */ |
| /* */ |
| if ( FT_READ_ULONG( format_tag ) ) |
| goto Exit; |
| |
| if ( format_tag == TTAG_ttcf ) |
| { |
| FT_Int n; |
| |
| |
| FT_TRACE3(( "TT_Load_SFNT_HeaderRec: file is a collection\n" )); |
| |
| /* It is a TrueType collection, i.e. a file containing several */ |
| /* font files. Read the font directory now */ |
| if ( FT_STREAM_READ_FIELDS( ttc_header_fields, &face->ttc_header ) ) |
| goto Exit; |
| |
| /* now read the offsets of each font in the file */ |
| if ( FT_NEW_ARRAY( face->ttc_header.offsets, face->ttc_header.count ) || |
| FT_FRAME_ENTER( face->ttc_header.count * 4L ) ) |
| goto Exit; |
| |
| for ( n = 0; n < face->ttc_header.count; n++ ) |
| face->ttc_header.offsets[n] = FT_GET_ULONG(); |
| |
| FT_FRAME_EXIT(); |
| |
| /* check face index */ |
| if ( face_index >= face->ttc_header.count ) |
| { |
| error = SFNT_Err_Bad_Argument; |
| goto Exit; |
| } |
| |
| /* seek to the appropriate TrueType file, then read tag */ |
| if ( FT_STREAM_SEEK( face->ttc_header.offsets[face_index] ) || |
| FT_READ_LONG( format_tag ) ) |
| goto Exit; |
| } |
| |
| /* the format tag was read, now check the rest of the header */ |
| sfnt->format_tag = format_tag; |
| if ( FT_STREAM_READ_FIELDS( sfnt_header_fields, sfnt ) ) |
| goto Exit; |
| |
| /* now, check the values of `num_tables', `seach_range', etc. */ |
| { |
| FT_UInt num_tables = sfnt->num_tables; |
| FT_ULong entry_selector = 1L << sfnt->entry_selector; |
| |
| |
| /* IMPORTANT: Many fonts have an incorrect `search_range' value, so */ |
| /* we only check the `entry_selector' correctness here. */ |
| /* */ |
| if ( num_tables == 0 || |
| entry_selector > num_tables || |
| entry_selector * 2 <= num_tables ) |
| { |
| FT_TRACE2(( "TT_Load_SFNT_HeaderRec: file is not SFNT!\n" )); |
| error = SFNT_Err_Unknown_File_Format; |
| } |
| } |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_Directory */ |
| /* */ |
| /* <Description> */ |
| /* Loads the table directory into a face object. */ |
| /* */ |
| /* <InOut> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* <Input> */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* sfnt :: The SFNT directory header. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| /* <Note> */ |
| /* The stream cursor must be at the font file's origin. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_Directory( TT_Face face, |
| FT_Stream stream, |
| SFNT_Header sfnt ) |
| { |
| FT_Error error; |
| FT_Memory memory = stream->memory; |
| |
| TT_TableRec *entry, *limit; |
| |
| |
| FT_TRACE2(( "TT_Load_Directory: %08p\n", face )); |
| |
| FT_TRACE2(( "-- Tables count: %12u\n", sfnt->num_tables )); |
| FT_TRACE2(( "-- Format version: %08lx\n", sfnt->format_tag )); |
| |
| face->num_tables = sfnt->num_tables; |
| |
| if ( FT_NEW_ARRAY( face->dir_tables, face->num_tables ) ) |
| goto Exit; |
| |
| if ( FT_FRAME_ENTER( face->num_tables * 16L ) ) |
| goto Exit; |
| |
| entry = face->dir_tables; |
| limit = entry + face->num_tables; |
| |
| for ( ; entry < limit; entry++ ) |
| { /* loop through the tables and get all entries */ |
| entry->Tag = FT_GET_TAG4(); |
| entry->CheckSum = FT_GET_ULONG(); |
| entry->Offset = FT_GET_LONG(); |
| entry->Length = FT_GET_LONG(); |
| |
| FT_TRACE2(( " %c%c%c%c - %08lx - %08lx\n", |
| (FT_Char)( entry->Tag >> 24 ), |
| (FT_Char)( entry->Tag >> 16 ), |
| (FT_Char)( entry->Tag >> 8 ), |
| (FT_Char)( entry->Tag ), |
| entry->Offset, |
| entry->Length )); |
| } |
| |
| FT_FRAME_EXIT(); |
| |
| FT_TRACE2(( "Directory loaded\n\n" )); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_Any */ |
| /* */ |
| /* <Description> */ |
| /* Loads any font table into client memory. */ |
| /* */ |
| /* <Input> */ |
| /* face :: The face object to look for. */ |
| /* */ |
| /* tag :: The tag of table to load. Use the value 0 if you want */ |
| /* to access the whole font file, else set this parameter */ |
| /* to a valid TrueType table tag that you can forge with */ |
| /* the MAKE_TT_TAG macro. */ |
| /* */ |
| /* offset :: The starting offset in the table (or the file if */ |
| /* tag == 0). */ |
| /* */ |
| /* length :: The address of the decision variable: */ |
| /* */ |
| /* If length == NULL: */ |
| /* Loads the whole table. Returns an error if */ |
| /* `offset' == 0! */ |
| /* */ |
| /* If *length == 0: */ |
| /* Exits immediately; returning the length of the given */ |
| /* table or of the font file, depending on the value of */ |
| /* `tag'. */ |
| /* */ |
| /* If *length != 0: */ |
| /* Loads the next `length' bytes of table or font, */ |
| /* starting at offset `offset' (in table or font too). */ |
| /* */ |
| /* <Output> */ |
| /* buffer :: The address of target buffer. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_Any( TT_Face face, |
| FT_ULong tag, |
| FT_Long offset, |
| FT_Byte* buffer, |
| FT_ULong* length ) |
| { |
| FT_Error error; |
| FT_Stream stream; |
| TT_Table table; |
| FT_ULong size; |
| |
| |
| if ( tag != 0 ) |
| { |
| /* look for tag in font directory */ |
| table = TT_LookUp_Table( face, tag ); |
| if ( !table ) |
| { |
| error = SFNT_Err_Table_Missing; |
| goto Exit; |
| } |
| |
| offset += table->Offset; |
| size = table->Length; |
| } |
| else |
| /* tag == 0 -- the user wants to access the font file directly */ |
| size = face->root.stream->size; |
| |
| if ( length && *length == 0 ) |
| { |
| *length = size; |
| |
| return SFNT_Err_Ok; |
| } |
| |
| if ( length ) |
| size = *length; |
| |
| stream = face->root.stream; |
| /* the `if' is syntactic sugar for picky compilers */ |
| if ( FT_STREAM_READ_AT( offset, buffer, size ) ) |
| goto Exit; |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_Generic_Header */ |
| /* */ |
| /* <Description> */ |
| /* Loads the TrueType table `head' or `bhed'. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| static FT_Error |
| TT_Load_Generic_Header( TT_Face face, |
| FT_Stream stream, |
| FT_ULong tag ) |
| { |
| FT_Error error; |
| TT_Header* header; |
| |
| static const FT_Frame_Field header_fields[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE TT_Header |
| |
| FT_FRAME_START( 54 ), |
| FT_FRAME_ULONG ( Table_Version ), |
| FT_FRAME_ULONG ( Font_Revision ), |
| FT_FRAME_LONG ( CheckSum_Adjust ), |
| FT_FRAME_LONG ( Magic_Number ), |
| FT_FRAME_USHORT( Flags ), |
| FT_FRAME_USHORT( Units_Per_EM ), |
| FT_FRAME_LONG ( Created[0] ), |
| FT_FRAME_LONG ( Created[1] ), |
| FT_FRAME_LONG ( Modified[0] ), |
| FT_FRAME_LONG ( Modified[1] ), |
| FT_FRAME_SHORT ( xMin ), |
| FT_FRAME_SHORT ( yMin ), |
| FT_FRAME_SHORT ( xMax ), |
| FT_FRAME_SHORT ( yMax ), |
| FT_FRAME_USHORT( Mac_Style ), |
| FT_FRAME_USHORT( Lowest_Rec_PPEM ), |
| FT_FRAME_SHORT ( Font_Direction ), |
| FT_FRAME_SHORT ( Index_To_Loc_Format ), |
| FT_FRAME_SHORT ( Glyph_Data_Format ), |
| FT_FRAME_END |
| }; |
| |
| |
| FT_TRACE2(( "TT_Load_Generic_Header: " |
| "%08p, looking up font table `%c%c%c%c'.\n", |
| face, |
| (FT_Char)( tag >> 24 ), |
| (FT_Char)( tag >> 16 ), |
| (FT_Char)( tag >> 8 ), |
| (FT_Char)( tag ) )); |
| |
| error = face->goto_table( face, tag, stream, 0 ); |
| if ( error ) |
| { |
| FT_TRACE2(( "TT_Load_Generic_Header: Font table is missing!\n" )); |
| goto Exit; |
| } |
| |
| header = &face->header; |
| |
| if ( FT_STREAM_READ_FIELDS( header_fields, header ) ) |
| goto Exit; |
| |
| FT_TRACE2(( " Units per EM: %8u\n", header->Units_Per_EM )); |
| FT_TRACE2(( " IndexToLoc: %8d\n", header->Index_To_Loc_Format )); |
| FT_TRACE2(( "TT_Load_Generic_Header: Font table loaded.\n" )); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_Header( TT_Face face, |
| FT_Stream stream ) |
| { |
| return TT_Load_Generic_Header( face, stream, TTAG_head ); |
| } |
| |
| |
| #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS |
| |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_Bitmap_Header( TT_Face face, |
| FT_Stream stream ) |
| { |
| return TT_Load_Generic_Header( face, stream, TTAG_bhed ); |
| } |
| |
| #endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_MaxProfile */ |
| /* */ |
| /* <Description> */ |
| /* Loads the maximum profile into a face object. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_MaxProfile( TT_Face face, |
| FT_Stream stream ) |
| { |
| FT_Error error; |
| TT_MaxProfile* maxProfile = &face->max_profile; |
| |
| const FT_Frame_Field maxp_fields[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE TT_MaxProfile |
| |
| FT_FRAME_START( 6 ), |
| FT_FRAME_LONG ( version ), |
| FT_FRAME_USHORT( numGlyphs ), |
| FT_FRAME_END |
| }; |
| |
| const FT_Frame_Field maxp_fields_extra[] = |
| { |
| FT_FRAME_START( 26 ), |
| FT_FRAME_USHORT( maxPoints ), |
| FT_FRAME_USHORT( maxContours ), |
| FT_FRAME_USHORT( maxCompositePoints ), |
| FT_FRAME_USHORT( maxCompositeContours ), |
| FT_FRAME_USHORT( maxZones ), |
| FT_FRAME_USHORT( maxTwilightPoints ), |
| FT_FRAME_USHORT( maxStorage ), |
| FT_FRAME_USHORT( maxFunctionDefs ), |
| FT_FRAME_USHORT( maxInstructionDefs ), |
| FT_FRAME_USHORT( maxStackElements ), |
| FT_FRAME_USHORT( maxSizeOfInstructions ), |
| FT_FRAME_USHORT( maxComponentElements ), |
| FT_FRAME_USHORT( maxComponentDepth ), |
| FT_FRAME_END |
| }; |
| |
| |
| FT_TRACE2(( "Load_TT_MaxProfile: %08p\n", face )); |
| |
| error = face->goto_table( face, TTAG_maxp, stream, 0 ); |
| if ( error ) |
| goto Exit; |
| |
| if ( FT_STREAM_READ_FIELDS( maxp_fields, maxProfile ) ) |
| goto Exit; |
| |
| maxProfile->maxPoints = 0; |
| maxProfile->maxContours = 0; |
| maxProfile->maxCompositePoints = 0; |
| maxProfile->maxCompositeContours = 0; |
| maxProfile->maxZones = 0; |
| maxProfile->maxTwilightPoints = 0; |
| maxProfile->maxStorage = 0; |
| maxProfile->maxFunctionDefs = 0; |
| maxProfile->maxInstructionDefs = 0; |
| maxProfile->maxStackElements = 0; |
| maxProfile->maxSizeOfInstructions = 0; |
| maxProfile->maxComponentElements = 0; |
| maxProfile->maxComponentDepth = 0; |
| |
| if ( maxProfile->version >= 0x10000L ) |
| { |
| if ( FT_STREAM_READ_FIELDS( maxp_fields_extra, maxProfile ) ) |
| goto Exit; |
| |
| /* XXX: an adjustment that is necessary to load certain */ |
| /* broken fonts like `Keystrokes MT' :-( */ |
| /* */ |
| /* We allocate 64 function entries by default when */ |
| /* the maxFunctionDefs field is null. */ |
| |
| if ( maxProfile->maxFunctionDefs == 0 ) |
| maxProfile->maxFunctionDefs = 64; |
| |
| face->root.num_glyphs = maxProfile->numGlyphs; |
| |
| face->root.internal->max_points = |
| (FT_UShort)MAX( maxProfile->maxCompositePoints, |
| maxProfile->maxPoints ); |
| |
| face->root.internal->max_contours = |
| (FT_Short)MAX( maxProfile->maxCompositeContours, |
| maxProfile->maxContours ); |
| |
| face->max_components = (FT_ULong)maxProfile->maxComponentElements + |
| maxProfile->maxComponentDepth; |
| |
| /* XXX: some fonts have maxComponents set to 0; we will */ |
| /* then use 16 of them by default. */ |
| if ( face->max_components == 0 ) |
| face->max_components = 16; |
| |
| /* We also increase maxPoints and maxContours in order to support */ |
| /* some broken fonts. */ |
| face->root.internal->max_points += (FT_UShort)8; |
| face->root.internal->max_contours += (FT_Short) 4; |
| } |
| |
| FT_TRACE2(( "MAXP loaded.\n" )); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_Metrics */ |
| /* */ |
| /* <Description> */ |
| /* Loads the horizontal or vertical metrics table into a face object. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* vertical :: A boolean flag. If set, load vertical metrics. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| static FT_Error |
| TT_Load_Metrics( TT_Face face, |
| FT_Stream stream, |
| FT_Bool vertical ) |
| { |
| FT_Error error; |
| FT_Memory memory = stream->memory; |
| |
| FT_ULong table_len; |
| FT_Long num_shorts, num_longs, num_shorts_checked; |
| |
| TT_LongMetrics * longs; |
| TT_ShortMetrics** shorts; |
| |
| |
| FT_TRACE2(( "TT_Load_%s_Metrics: %08p\n", vertical ? "Vertical" |
| : "Horizontal", |
| face )); |
| |
| if ( vertical ) |
| { |
| /* The table is optional, quit silently if it wasn't found */ |
| /* */ |
| /* XXX: Some fonts have a valid vertical header with a non-null */ |
| /* `number_of_VMetrics' fields, but no corresponding `vmtx' */ |
| /* table to get the metrics from (e.g. mingliu). */ |
| /* */ |
| /* For safety, we set the field to 0! */ |
| /* */ |
| error = face->goto_table( face, TTAG_vmtx, stream, &table_len ); |
| if ( error ) |
| { |
| /* Set number_Of_VMetrics to 0! */ |
| FT_TRACE2(( " no vertical header in file.\n" )); |
| face->vertical.number_Of_VMetrics = 0; |
| error = SFNT_Err_Ok; |
| goto Exit; |
| } |
| |
| num_longs = face->vertical.number_Of_VMetrics; |
| longs = (TT_LongMetrics *)&face->vertical.long_metrics; |
| shorts = (TT_ShortMetrics**)&face->vertical.short_metrics; |
| } |
| else |
| { |
| error = face->goto_table( face, TTAG_hmtx, stream, &table_len ); |
| if ( error ) |
| { |
| FT_ERROR(( " no horizontal metrics in file!\n" )); |
| error = SFNT_Err_Hmtx_Table_Missing; |
| goto Exit; |
| } |
| |
| num_longs = face->horizontal.number_Of_HMetrics; |
| longs = (TT_LongMetrics *)&face->horizontal.long_metrics; |
| shorts = (TT_ShortMetrics**)&face->horizontal.short_metrics; |
| } |
| |
| /* never trust derived values */ |
| |
| num_shorts = face->max_profile.numGlyphs - num_longs; |
| num_shorts_checked = ( table_len - num_longs * 4L ) / 2; |
| |
| if ( num_shorts < 0 ) |
| { |
| FT_ERROR(( "TT_Load_%s_Metrics: more metrics than glyphs!\n", |
| vertical ? "Vertical" |
| : "Horizontal" )); |
| |
| error = vertical ? SFNT_Err_Invalid_Vert_Metrics |
| : SFNT_Err_Invalid_Horiz_Metrics; |
| goto Exit; |
| } |
| |
| if ( FT_NEW_ARRAY( *longs, num_longs ) || |
| FT_NEW_ARRAY( *shorts, num_shorts ) ) |
| goto Exit; |
| |
| if ( FT_FRAME_ENTER( table_len ) ) |
| goto Exit; |
| |
| { |
| TT_LongMetrics cur = *longs; |
| TT_LongMetrics limit = cur + num_longs; |
| |
| |
| for ( ; cur < limit; cur++ ) |
| { |
| cur->advance = FT_GET_USHORT(); |
| cur->bearing = FT_GET_SHORT(); |
| } |
| } |
| |
| /* do we have an inconsistent number of metric values? */ |
| { |
| TT_ShortMetrics* cur = *shorts; |
| TT_ShortMetrics* limit = cur + MIN( num_shorts, num_shorts_checked ); |
| |
| |
| for ( ; cur < limit; cur++ ) |
| *cur = FT_GET_SHORT(); |
| |
| /* we fill up the missing left side bearings with the */ |
| /* last valid value. Since this will occur for buggy CJK */ |
| /* fonts usually only, nothing serious will happen */ |
| if ( num_shorts > num_shorts_checked && num_shorts_checked > 0 ) |
| { |
| FT_Short val = (*shorts)[num_shorts_checked - 1]; |
| |
| |
| limit = *shorts + num_shorts; |
| for ( ; cur < limit; cur++ ) |
| *cur = val; |
| } |
| } |
| |
| FT_FRAME_EXIT(); |
| |
| FT_TRACE2(( "loaded\n" )); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_Metrics_Header */ |
| /* */ |
| /* <Description> */ |
| /* Loads the horizontal or vertical header in a face object. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* vertical :: A boolean flag. If set, load vertical metrics. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_Metrics_Header( TT_Face face, |
| FT_Stream stream, |
| FT_Bool vertical ) |
| { |
| FT_Error error; |
| TT_HoriHeader* header; |
| |
| const FT_Frame_Field metrics_header_fields[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE TT_HoriHeader |
| |
| FT_FRAME_START( 36 ), |
| FT_FRAME_ULONG ( Version ), |
| FT_FRAME_SHORT ( Ascender ), |
| FT_FRAME_SHORT ( Descender ), |
| FT_FRAME_SHORT ( Line_Gap ), |
| FT_FRAME_USHORT( advance_Width_Max ), |
| FT_FRAME_SHORT ( min_Left_Side_Bearing ), |
| FT_FRAME_SHORT ( min_Right_Side_Bearing ), |
| FT_FRAME_SHORT ( xMax_Extent ), |
| FT_FRAME_SHORT ( caret_Slope_Rise ), |
| FT_FRAME_SHORT ( caret_Slope_Run ), |
| FT_FRAME_SHORT ( caret_Offset ), |
| FT_FRAME_SHORT ( Reserved[0] ), |
| FT_FRAME_SHORT ( Reserved[1] ), |
| FT_FRAME_SHORT ( Reserved[2] ), |
| FT_FRAME_SHORT ( Reserved[3] ), |
| FT_FRAME_SHORT ( metric_Data_Format ), |
| FT_FRAME_USHORT( number_Of_HMetrics ), |
| FT_FRAME_END |
| }; |
| |
| |
| FT_TRACE2(( vertical ? "Vertical header " : "Horizontal header " )); |
| |
| if ( vertical ) |
| { |
| face->vertical_info = 0; |
| |
| /* The vertical header table is optional, so return quietly if */ |
| /* we don't find it. */ |
| error = face->goto_table( face, TTAG_vhea, stream, 0 ); |
| if ( error ) |
| { |
| error = SFNT_Err_Ok; |
| goto Exit; |
| } |
| |
| face->vertical_info = 1; |
| header = (TT_HoriHeader*)&face->vertical; |
| } |
| else |
| { |
| /* The horizontal header is mandatory; return an error if we */ |
| /* don't find it. */ |
| error = face->goto_table( face, TTAG_hhea, stream, 0 ); |
| if ( error ) |
| { |
| error = SFNT_Err_Horiz_Header_Missing; |
| goto Exit; |
| } |
| |
| header = &face->horizontal; |
| } |
| |
| if ( FT_STREAM_READ_FIELDS( metrics_header_fields, header ) ) |
| goto Exit; |
| |
| header->long_metrics = NULL; |
| header->short_metrics = NULL; |
| |
| FT_TRACE2(( "loaded\n" )); |
| |
| /* Now try to load the corresponding metrics */ |
| |
| error = TT_Load_Metrics( face, stream, vertical ); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_Names */ |
| /* */ |
| /* <Description> */ |
| /* Loads the name records. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_Names( TT_Face face, |
| FT_Stream stream ) |
| { |
| FT_Error error; |
| FT_Memory memory = stream->memory; |
| FT_ULong table_pos, table_len; |
| FT_ULong storage_start, storage_limit; |
| FT_UInt count; |
| TT_NameTable table; |
| |
| static const FT_Frame_Field name_table_fields[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE TT_NameTableRec |
| |
| FT_FRAME_START( 6 ), |
| FT_FRAME_USHORT( format ), |
| FT_FRAME_USHORT( numNameRecords ), |
| FT_FRAME_USHORT( storageOffset ), |
| FT_FRAME_END |
| }; |
| |
| static const FT_Frame_Field name_record_fields[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE TT_NameEntryRec |
| |
| /* no FT_FRAME_START */ |
| FT_FRAME_USHORT( platformID ), |
| FT_FRAME_USHORT( encodingID ), |
| FT_FRAME_USHORT( languageID ), |
| FT_FRAME_USHORT( nameID ), |
| FT_FRAME_USHORT( stringLength ), |
| FT_FRAME_USHORT( stringOffset ), |
| FT_FRAME_END |
| }; |
| |
| |
| table = &face->name_table; |
| table->stream = stream; |
| |
| FT_TRACE2(( "Names " )); |
| |
| error = face->goto_table( face, TTAG_name, stream, &table_len ); |
| if ( error ) |
| { |
| /* The name table is required so indicate failure. */ |
| FT_TRACE2(( "is missing!\n" )); |
| error = SFNT_Err_Name_Table_Missing; |
| goto Exit; |
| } |
| |
| table_pos = FT_STREAM_POS(); |
| |
| |
| if ( FT_STREAM_READ_FIELDS( name_table_fields, table ) ) |
| goto Exit; |
| |
| /* Some popular asian fonts have an invalid `storageOffset' value */ |
| /* (it should be at least "6 + 12*num_names"). However, the string */ |
| /* offsets, computed as "storageOffset + entry->stringOffset", are */ |
| /* valid pointers within the name table... */ |
| /* */ |
| /* We thus can't check `storageOffset' right now. */ |
| /* */ |
| storage_start = table_pos + 6 + 12*table->numNameRecords; |
| storage_limit = table_pos + table_len; |
| |
| if ( storage_start > storage_limit ) |
| { |
| FT_ERROR(( "TT_Load_Names: invalid `name' table\n" )); |
| error = SFNT_Err_Name_Table_Missing; |
| goto Exit; |
| } |
| |
| /* Allocate the array of name records. */ |
| count = table->numNameRecords; |
| table->numNameRecords = 0; |
| |
| if ( FT_NEW_ARRAY( table->names, count ) || |
| FT_FRAME_ENTER( count * 12 ) ) |
| goto Exit; |
| |
| /* Load the name records and determine how much storage is needed */ |
| /* to hold the strings themselves. */ |
| { |
| TT_NameEntryRec* entry = table->names; |
| |
| |
| for ( ; count > 0; count-- ) |
| { |
| if ( FT_STREAM_READ_FIELDS( name_record_fields, entry ) ) |
| continue; |
| |
| /* check that the name is not empty */ |
| if ( entry->stringLength == 0 ) |
| continue; |
| |
| /* check that the name string is within the table */ |
| entry->stringOffset += table_pos + table->storageOffset; |
| if ( entry->stringOffset < storage_start || |
| entry->stringOffset + entry->stringLength > storage_limit ) |
| { |
| /* invalid entry - ignore it */ |
| entry->stringOffset = 0; |
| entry->stringLength = 0; |
| continue; |
| } |
| |
| entry++; |
| } |
| |
| table->numNameRecords = entry - table->names; |
| } |
| |
| FT_FRAME_EXIT(); |
| |
| FT_TRACE2(( "loaded\n" )); |
| |
| /* everything went well, update face->num_names */ |
| face->num_names = (FT_UShort) table->numNameRecords; |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Free_Names */ |
| /* */ |
| /* <Description> */ |
| /* Frees the name records. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| FT_LOCAL_DEF( void ) |
| TT_Free_Names( TT_Face face ) |
| { |
| FT_Memory memory = face->root.driver->root.memory; |
| TT_NameTable table = &face->name_table; |
| TT_NameEntry entry = table->names; |
| FT_UInt count = table->numNameRecords; |
| |
| |
| for ( ; count > 0; count--, entry++ ) |
| { |
| FT_FREE( entry->string ); |
| entry->stringLength = 0; |
| } |
| |
| /* free strings table */ |
| FT_FREE( table->names ); |
| |
| table->numNameRecords = 0; |
| table->format = 0; |
| table->storageOffset = 0; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_CMap */ |
| /* */ |
| /* <Description> */ |
| /* Loads the cmap directory in a face object. The cmaps itselves are */ |
| /* loaded on demand in the `ttcmap.c' module. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: A handle to the input stream. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| |
| #ifdef FT_CONFIG_OPTION_USE_CMAPS |
| |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_CMap( TT_Face face, |
| FT_Stream stream ) |
| { |
| FT_Error error; |
| |
| |
| error = face->goto_table( face, TTAG_cmap, stream, &face->cmap_size ); |
| if ( error ) |
| { |
| FT_TRACE2(( "No `cmap' table in font !\n" )); |
| error = SFNT_Err_CMap_Table_Missing; |
| goto Exit; |
| } |
| |
| if ( !FT_FRAME_EXTRACT( face->cmap_size, face->cmap_table ) ) |
| FT_TRACE2(( "`cmap' table loaded\n" )); |
| else |
| { |
| FT_ERROR(( "`cmap' table is too short!\n" )); |
| face->cmap_size = 0; |
| } |
| |
| Exit: |
| return error; |
| } |
| |
| #else /* !FT_CONFIG_OPTION_USE_CMAPS */ |
| |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_CMap( TT_Face face, |
| FT_Stream stream ) |
| { |
| FT_Error error; |
| FT_Memory memory = stream->memory; |
| FT_Long table_start; |
| TT_CMapDirRec cmap_dir; |
| |
| const FT_Frame_Field cmap_fields[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE TT_CMapDirRec |
| |
| FT_FRAME_START( 4 ), |
| FT_FRAME_USHORT( tableVersionNumber ), |
| FT_FRAME_USHORT( numCMaps ), |
| FT_FRAME_END |
| }; |
| |
| const FT_Frame_Field cmap_rec_fields[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE TT_CMapTableRec |
| |
| FT_FRAME_START( 4 ), |
| FT_FRAME_USHORT( format ), |
| FT_FRAME_USHORT( length ), |
| FT_FRAME_END |
| }; |
| |
| |
| FT_TRACE2(( "CMaps " )); |
| |
| error = face->goto_table( face, TTAG_cmap, stream, 0 ); |
| if ( error ) |
| { |
| error = SFNT_Err_CMap_Table_Missing; |
| goto Exit; |
| } |
| |
| table_start = FT_STREAM_POS(); |
| |
| if ( FT_STREAM_READ_FIELDS( cmap_fields, &cmap_dir ) ) |
| goto Exit; |
| |
| /* reserve space in face table for cmap tables */ |
| if ( FT_NEW_ARRAY( face->charmaps, cmap_dir.numCMaps ) ) |
| goto Exit; |
| |
| face->num_charmaps = cmap_dir.numCMaps; |
| { |
| TT_CharMap charmap = face->charmaps; |
| TT_CharMap limit = charmap + face->num_charmaps; |
| |
| |
| /* read the header of each charmap first */ |
| if ( FT_FRAME_ENTER( face->num_charmaps * 8L ) ) |
| goto Exit; |
| |
| for ( ; charmap < limit; charmap++ ) |
| { |
| TT_CMapTable cmap; |
| |
| |
| charmap->root.face = (FT_Face)face; |
| cmap = &charmap->cmap; |
| |
| cmap->loaded = FALSE; |
| cmap->platformID = FT_GET_USHORT(); |
| cmap->platformEncodingID = FT_GET_USHORT(); |
| cmap->offset = (FT_ULong)FT_GET_LONG(); |
| } |
| |
| FT_FRAME_EXIT(); |
| |
| /* now read the rest of each table */ |
| for ( charmap = face->charmaps; charmap < limit; charmap++ ) |
| { |
| TT_CMapTable cmap = &charmap->cmap; |
| |
| |
| if ( FT_STREAM_SEEK( table_start + (FT_Long)cmap->offset ) || |
| FT_STREAM_READ_FIELDS( cmap_rec_fields, cmap ) ) |
| goto Exit; |
| |
| cmap->offset = FT_STREAM_POS(); |
| } |
| } |
| |
| FT_TRACE2(( "loaded\n" )); |
| |
| Exit: |
| return error; |
| } |
| |
| #endif /* !FT_CONFIG_OPTION_USE_CMAPS */ |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_OS2 */ |
| /* */ |
| /* <Description> */ |
| /* Loads the OS2 table. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: A handle to the input stream. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_OS2( TT_Face face, |
| FT_Stream stream ) |
| { |
| FT_Error error; |
| TT_OS2* os2; |
| |
| const FT_Frame_Field os2_fields[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE TT_OS2 |
| |
| FT_FRAME_START( 78 ), |
| FT_FRAME_USHORT( version ), |
| FT_FRAME_SHORT ( xAvgCharWidth ), |
| FT_FRAME_USHORT( usWeightClass ), |
| FT_FRAME_USHORT( usWidthClass ), |
| FT_FRAME_SHORT ( fsType ), |
| FT_FRAME_SHORT ( ySubscriptXSize ), |
| FT_FRAME_SHORT ( ySubscriptYSize ), |
| FT_FRAME_SHORT ( ySubscriptXOffset ), |
| FT_FRAME_SHORT ( ySubscriptYOffset ), |
| FT_FRAME_SHORT ( ySuperscriptXSize ), |
| FT_FRAME_SHORT ( ySuperscriptYSize ), |
| FT_FRAME_SHORT ( ySuperscriptXOffset ), |
| FT_FRAME_SHORT ( ySuperscriptYOffset ), |
| FT_FRAME_SHORT ( yStrikeoutSize ), |
| FT_FRAME_SHORT ( yStrikeoutPosition ), |
| FT_FRAME_SHORT ( sFamilyClass ), |
| FT_FRAME_BYTE ( panose[0] ), |
| FT_FRAME_BYTE ( panose[1] ), |
| FT_FRAME_BYTE ( panose[2] ), |
| FT_FRAME_BYTE ( panose[3] ), |
| FT_FRAME_BYTE ( panose[4] ), |
| FT_FRAME_BYTE ( panose[5] ), |
| FT_FRAME_BYTE ( panose[6] ), |
| FT_FRAME_BYTE ( panose[7] ), |
| FT_FRAME_BYTE ( panose[8] ), |
| FT_FRAME_BYTE ( panose[9] ), |
| FT_FRAME_ULONG ( ulUnicodeRange1 ), |
| FT_FRAME_ULONG ( ulUnicodeRange2 ), |
| FT_FRAME_ULONG ( ulUnicodeRange3 ), |
| FT_FRAME_ULONG ( ulUnicodeRange4 ), |
| FT_FRAME_BYTE ( achVendID[0] ), |
| FT_FRAME_BYTE ( achVendID[1] ), |
| FT_FRAME_BYTE ( achVendID[2] ), |
| FT_FRAME_BYTE ( achVendID[3] ), |
| |
| FT_FRAME_USHORT( fsSelection ), |
| FT_FRAME_USHORT( usFirstCharIndex ), |
| FT_FRAME_USHORT( usLastCharIndex ), |
| FT_FRAME_SHORT ( sTypoAscender ), |
| FT_FRAME_SHORT ( sTypoDescender ), |
| FT_FRAME_SHORT ( sTypoLineGap ), |
| FT_FRAME_USHORT( usWinAscent ), |
| FT_FRAME_USHORT( usWinDescent ), |
| FT_FRAME_END |
| }; |
| |
| const FT_Frame_Field os2_fields_extra[] = |
| { |
| FT_FRAME_START( 8 ), |
| FT_FRAME_ULONG( ulCodePageRange1 ), |
| FT_FRAME_ULONG( ulCodePageRange2 ), |
| FT_FRAME_END |
| }; |
| |
| const FT_Frame_Field os2_fields_extra2[] = |
| { |
| FT_FRAME_START( 10 ), |
| FT_FRAME_SHORT ( sxHeight ), |
| FT_FRAME_SHORT ( sCapHeight ), |
| FT_FRAME_USHORT( usDefaultChar ), |
| FT_FRAME_USHORT( usBreakChar ), |
| FT_FRAME_USHORT( usMaxContext ), |
| FT_FRAME_END |
| }; |
| |
| |
| FT_TRACE2(( "OS/2 Table " )); |
| |
| /* We now support old Mac fonts where the OS/2 table doesn't */ |
| /* exist. Simply put, we set the `version' field to 0xFFFF */ |
| /* and test this value each time we need to access the table. */ |
| error = face->goto_table( face, TTAG_OS2, stream, 0 ); |
| if ( error ) |
| { |
| FT_TRACE2(( "is missing!\n" )); |
| face->os2.version = 0xFFFFU; |
| error = SFNT_Err_Ok; |
| goto Exit; |
| } |
| |
| os2 = &face->os2; |
| |
| if ( FT_STREAM_READ_FIELDS( os2_fields, os2 ) ) |
| goto Exit; |
| |
| os2->ulCodePageRange1 = 0; |
| os2->ulCodePageRange2 = 0; |
| os2->sxHeight = 0; |
| os2->sCapHeight = 0; |
| os2->usDefaultChar = 0; |
| os2->usBreakChar = 0; |
| os2->usMaxContext = 0; |
| |
| if ( os2->version >= 0x0001 ) |
| { |
| /* only version 1 tables */ |
| if ( FT_STREAM_READ_FIELDS( os2_fields_extra, os2 ) ) |
| goto Exit; |
| |
| if ( os2->version >= 0x0002 ) |
| { |
| /* only version 2 tables */ |
| if ( FT_STREAM_READ_FIELDS( os2_fields_extra2, os2 ) ) |
| goto Exit; |
| } |
| } |
| |
| FT_TRACE2(( "loaded\n" )); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_Postscript */ |
| /* */ |
| /* <Description> */ |
| /* Loads the Postscript table. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: A handle to the input stream. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_PostScript( TT_Face face, |
| FT_Stream stream ) |
| { |
| FT_Error error; |
| TT_Postscript* post = &face->postscript; |
| |
| static const FT_Frame_Field post_fields[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE TT_Postscript |
| |
| FT_FRAME_START( 32 ), |
| FT_FRAME_ULONG( FormatType ), |
| FT_FRAME_ULONG( italicAngle ), |
| FT_FRAME_SHORT( underlinePosition ), |
| FT_FRAME_SHORT( underlineThickness ), |
| FT_FRAME_ULONG( isFixedPitch ), |
| FT_FRAME_ULONG( minMemType42 ), |
| FT_FRAME_ULONG( maxMemType42 ), |
| FT_FRAME_ULONG( minMemType1 ), |
| FT_FRAME_ULONG( maxMemType1 ), |
| FT_FRAME_END |
| }; |
| |
| |
| FT_TRACE2(( "PostScript " )); |
| |
| error = face->goto_table( face, TTAG_post, stream, 0 ); |
| if ( error ) |
| return SFNT_Err_Post_Table_Missing; |
| |
| if ( FT_STREAM_READ_FIELDS( post_fields, post ) ) |
| return error; |
| |
| /* we don't load the glyph names, we do that in another */ |
| /* module (ttpost). */ |
| FT_TRACE2(( "loaded\n" )); |
| |
| return SFNT_Err_Ok; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_PCLT */ |
| /* */ |
| /* <Description> */ |
| /* Loads the PCL 5 Table. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: A handle to the input stream. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_PCLT( TT_Face face, |
| FT_Stream stream ) |
| { |
| static const FT_Frame_Field pclt_fields[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE TT_PCLT |
| |
| FT_FRAME_START( 54 ), |
| FT_FRAME_ULONG ( Version ), |
| FT_FRAME_ULONG ( FontNumber ), |
| FT_FRAME_USHORT( Pitch ), |
| FT_FRAME_USHORT( xHeight ), |
| FT_FRAME_USHORT( Style ), |
| FT_FRAME_USHORT( TypeFamily ), |
| FT_FRAME_USHORT( CapHeight ), |
| FT_FRAME_BYTES ( TypeFace, 16 ), |
| FT_FRAME_BYTES ( CharacterComplement, 8 ), |
| FT_FRAME_BYTES ( FileName, 6 ), |
| FT_FRAME_CHAR ( StrokeWeight ), |
| FT_FRAME_CHAR ( WidthType ), |
| FT_FRAME_BYTE ( SerifStyle ), |
| FT_FRAME_BYTE ( Reserved ), |
| FT_FRAME_END |
| }; |
| |
| FT_Error error; |
| TT_PCLT* pclt = &face->pclt; |
| |
| |
| FT_TRACE2(( "PCLT " )); |
| |
| /* optional table */ |
| error = face->goto_table( face, TTAG_PCLT, stream, 0 ); |
| if ( error ) |
| { |
| FT_TRACE2(( "missing (optional)\n" )); |
| pclt->Version = 0; |
| return SFNT_Err_Ok; |
| } |
| |
| if ( FT_STREAM_READ_FIELDS( pclt_fields, pclt ) ) |
| goto Exit; |
| |
| FT_TRACE2(( "loaded\n" )); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_Gasp */ |
| /* */ |
| /* <Description> */ |
| /* Loads the `gasp' table into a face object. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_Gasp( TT_Face face, |
| FT_Stream stream ) |
| { |
| FT_Error error; |
| FT_Memory memory = stream->memory; |
| |
| FT_UInt j,num_ranges; |
| TT_GaspRange gaspranges; |
| |
| |
| FT_TRACE2(( "TT_Load_Gasp: %08p\n", face )); |
| |
| /* the gasp table is optional */ |
| error = face->goto_table( face, TTAG_gasp, stream, 0 ); |
| if ( error ) |
| return SFNT_Err_Ok; |
| |
| if ( FT_FRAME_ENTER( 4L ) ) |
| goto Exit; |
| |
| face->gasp.version = FT_GET_USHORT(); |
| face->gasp.numRanges = FT_GET_USHORT(); |
| |
| FT_FRAME_EXIT(); |
| |
| num_ranges = face->gasp.numRanges; |
| FT_TRACE3(( "number of ranges = %d\n", num_ranges )); |
| |
| if ( FT_NEW_ARRAY( gaspranges, num_ranges ) || |
| FT_FRAME_ENTER( num_ranges * 4L ) ) |
| goto Exit; |
| |
| face->gasp.gaspRanges = gaspranges; |
| |
| for ( j = 0; j < num_ranges; j++ ) |
| { |
| gaspranges[j].maxPPEM = FT_GET_USHORT(); |
| gaspranges[j].gaspFlag = FT_GET_USHORT(); |
| |
| FT_TRACE3(( " [max:%d flag:%d]", |
| gaspranges[j].maxPPEM, |
| gaspranges[j].gaspFlag )); |
| } |
| FT_TRACE3(( "\n" )); |
| |
| FT_FRAME_EXIT(); |
| FT_TRACE2(( "GASP loaded\n" )); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| FT_CALLBACK_DEF( int ) |
| tt_kern_pair_compare( const void* a, |
| const void* b ); |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_Kern */ |
| /* */ |
| /* <Description> */ |
| /* Loads the first kerning table with format 0 in the font. Only */ |
| /* accepts the first horizontal kerning table. Developers should use */ |
| /* the `ftxkern' extension to access other kerning tables in the font */ |
| /* file, if they really want to. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: The input stream. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_Kern( TT_Face face, |
| FT_Stream stream ) |
| { |
| FT_Error error; |
| FT_Memory memory = stream->memory; |
| |
| FT_UInt n, num_tables; |
| |
| |
| /* the kern table is optional; exit silently if it is missing */ |
| error = face->goto_table( face, TTAG_kern, stream, 0 ); |
| if ( error ) |
| return SFNT_Err_Ok; |
| |
| if ( FT_FRAME_ENTER( 4L ) ) |
| goto Exit; |
| |
| (void)FT_GET_USHORT(); /* version */ |
| num_tables = FT_GET_USHORT(); |
| |
| FT_FRAME_EXIT(); |
| |
| for ( n = 0; n < num_tables; n++ ) |
| { |
| FT_UInt coverage; |
| FT_UInt length; |
| |
| |
| if ( FT_FRAME_ENTER( 6L ) ) |
| goto Exit; |
| |
| (void)FT_GET_USHORT(); /* version */ |
| length = FT_GET_USHORT() - 6; /* substract header length */ |
| coverage = FT_GET_USHORT(); |
| |
| FT_FRAME_EXIT(); |
| |
| if ( coverage == 0x0001 ) |
| { |
| FT_UInt num_pairs; |
| TT_Kern0_Pair pair; |
| TT_Kern0_Pair limit; |
| |
| |
| /* found a horizontal format 0 kerning table! */ |
| if ( FT_FRAME_ENTER( 8L ) ) |
| goto Exit; |
| |
| num_pairs = FT_GET_USHORT(); |
| |
| /* skip the rest */ |
| |
| FT_FRAME_EXIT(); |
| |
| /* allocate array of kerning pairs */ |
| if ( FT_NEW_ARRAY( face->kern_pairs, num_pairs ) || |
| FT_FRAME_ENTER( 6L * num_pairs ) ) |
| goto Exit; |
| |
| pair = face->kern_pairs; |
| limit = pair + num_pairs; |
| for ( ; pair < limit; pair++ ) |
| { |
| pair->left = FT_GET_USHORT(); |
| pair->right = FT_GET_USHORT(); |
| pair->value = FT_GET_USHORT(); |
| } |
| |
| FT_FRAME_EXIT(); |
| |
| face->num_kern_pairs = num_pairs; |
| face->kern_table_index = n; |
| |
| /* ensure that the kerning pair table is sorted (yes, some */ |
| /* fonts have unsorted tables!) */ |
| { |
| FT_UInt i; |
| TT_Kern0_Pair pair0; |
| |
| |
| pair0 = face->kern_pairs; |
| |
| for ( i = 1; i < num_pairs; i++, pair0++ ) |
| { |
| if ( tt_kern_pair_compare( pair0, pair0 + 1 ) != -1 ) |
| { |
| ft_qsort( (void*)face->kern_pairs, (int)num_pairs, |
| sizeof ( TT_Kern0_PairRec ), tt_kern_pair_compare ); |
| break; |
| } |
| } |
| } |
| |
| goto Exit; |
| } |
| |
| if ( FT_STREAM_SKIP( length ) ) |
| goto Exit; |
| } |
| |
| /* no kern table found -- doesn't matter */ |
| face->kern_table_index = -1; |
| face->num_kern_pairs = 0; |
| face->kern_pairs = NULL; |
| |
| Exit: |
| return error; |
| } |
| |
| |
| #undef TT_KERN_INDEX |
| #define TT_KERN_INDEX( g1, g2 ) ( ( (FT_ULong)g1 << 16 ) | g2 ) |
| |
| |
| FT_CALLBACK_DEF( int ) |
| tt_kern_pair_compare( const void* a, |
| const void* b ) |
| { |
| TT_Kern0_Pair pair1 = (TT_Kern0_Pair)a; |
| TT_Kern0_Pair pair2 = (TT_Kern0_Pair)b; |
| |
| FT_ULong index1 = TT_KERN_INDEX( pair1->left, pair1->right ); |
| FT_ULong index2 = TT_KERN_INDEX( pair2->left, pair2->right ); |
| |
| |
| return ( index1 < index2 ? -1 : |
| ( index1 > index2 ? 1 : 0 )); |
| } |
| |
| |
| #undef TT_KERN_INDEX |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Load_Hdmx */ |
| /* */ |
| /* <Description> */ |
| /* Loads the horizontal device metrics table. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| /* stream :: A handle to the input stream. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| TT_Load_Hdmx( TT_Face face, |
| FT_Stream stream ) |
| { |
| FT_Error error; |
| FT_Memory memory = stream->memory; |
| |
| TT_Hdmx hdmx = &face->hdmx; |
| FT_Long num_glyphs; |
| FT_Long record_size; |
| |
| |
| hdmx->version = 0; |
| hdmx->num_records = 0; |
| hdmx->records = 0; |
| |
| /* this table is optional */ |
| error = face->goto_table( face, TTAG_hdmx, stream, 0 ); |
| if ( error ) |
| return SFNT_Err_Ok; |
| |
| if ( FT_FRAME_ENTER( 8L ) ) |
| goto Exit; |
| |
| hdmx->version = FT_GET_USHORT(); |
| hdmx->num_records = FT_GET_SHORT(); |
| record_size = FT_GET_LONG(); |
| |
| FT_FRAME_EXIT(); |
| |
| /* Only recognize format 0 */ |
| if ( hdmx->version != 0 ) |
| goto Exit; |
| |
| if ( FT_NEW_ARRAY( hdmx->records, hdmx->num_records ) ) |
| goto Exit; |
| |
| num_glyphs = face->root.num_glyphs; |
| record_size -= num_glyphs + 2; |
| |
| { |
| TT_HdmxEntry cur = hdmx->records; |
| TT_HdmxEntry limit = cur + hdmx->num_records; |
| |
| |
| for ( ; cur < limit; cur++ ) |
| { |
| /* read record */ |
| if ( FT_READ_BYTE( cur->ppem ) || |
| FT_READ_BYTE( cur->max_width ) ) |
| goto Exit; |
| |
| if ( FT_ALLOC( cur->widths, num_glyphs ) || |
| FT_STREAM_READ( cur->widths, num_glyphs ) ) |
| goto Exit; |
| |
| /* skip padding bytes */ |
| if ( record_size > 0 && FT_STREAM_SKIP( record_size ) ) |
| goto Exit; |
| } |
| } |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* TT_Free_Hdmx */ |
| /* */ |
| /* <Description> */ |
| /* Frees the horizontal device metrics table. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A handle to the target face object. */ |
| /* */ |
| FT_LOCAL_DEF( void ) |
| TT_Free_Hdmx( TT_Face face ) |
| { |
| if ( face ) |
| { |
| FT_Int n; |
| FT_Memory memory = face->root.driver->root.memory; |
| |
| |
| for ( n = 0; n < face->hdmx.num_records; n++ ) |
| FT_FREE( face->hdmx.records[n].widths ); |
| |
| FT_FREE( face->hdmx.records ); |
| face->hdmx.num_records = 0; |
| } |
| } |
| |
| |
| /* END */ |
