+++ /dev/null
-/***************************************************************************/
-/* */
-/* ttload.c */
-/* */
-/* Load the basic TrueType tables, i.e., tables that can be either in */
-/* TTF or OTF fonts (body). */
-/* */
-/* Copyright 1996-2001 by */
-/* David Turner, Robert Wilhelm, and Werner Lemberg. */
-/* */
-/* This file is part of the FreeType project, and may only be used, */
-/* modified, and distributed under the terms of the FreeType project */
-/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
-/* this file you indicate that you have read the license and */
-/* understand and accept it fully. */
-/* */
-/***************************************************************************/
-
-
-#include <ft2build.h>
-#include FT_INTERNAL_DEBUG_H
-#include FT_INTERNAL_STREAM_H
-#include FT_TRUETYPE_TAGS_H
-#include "ttload.h"
-#include "ttcmap.h"
-
-#include "sferrors.h"
-
-#include <stdlib.h> /* for qsort */
-
- /*************************************************************************/
- /* */
- /* 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++ )
- {
- if ( entry->Tag == tag )
- {
- 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 ( FILE_Seek( table->Offset ) )
- goto Exit;
- }
- else
- error = SFNT_Err_Table_Missing;
-
- Exit:
- return error;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Load_SFNT_Header */
- /* */
- /* <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_Header( 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_Header
-
- 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_Header
-
- FT_FRAME_START( 8 ),
- FT_FRAME_LONG( version ),
- FT_FRAME_LONG( count ),
- FT_FRAME_END };
-
-
- FT_TRACE2(( "TT_Load_SFNT_Header: %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 ( READ_ULong( format_tag ) )
- goto Exit;
-
- if ( format_tag == TTAG_ttcf )
- {
- FT_Int n;
-
-
- FT_TRACE3(( "TT_Load_SFNT_Header: file is a collection\n" ));
-
- /* it's a TrueType collection, i.e. a file containing several */
- /* font files. Read the font directory now */
- if ( READ_Fields( ttc_header_fields, &face->ttc_header ) )
- goto Exit;
-
- /* now read the offsets of each font in the file */
- if ( ALLOC_ARRAY( face->ttc_header.offsets,
- face->ttc_header.count,
- FT_ULong ) ||
- ACCESS_Frame( face->ttc_header.count * 4L ) )
- goto Exit;
-
- for ( n = 0; n < face->ttc_header.count; n++ )
- face->ttc_header.offsets[n] = GET_ULong();
-
- FORGET_Frame();
-
- /* 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 ( FILE_Seek( face->ttc_header.offsets[face_index] ) ||
- READ_Long( format_tag ) )
- goto Exit;
- }
-
- /* the format tag was read, now check the rest of the header */
- sfnt->format_tag = format_tag;
- if ( 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_Header: 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_Table *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 ( ALLOC_ARRAY( face->dir_tables,
- face->num_tables,
- TT_Table ) )
- goto Exit;
-
- if ( ACCESS_Frame( 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 = GET_Tag4();
- entry->CheckSum = GET_ULong();
- entry->Offset = GET_Long();
- entry->Length = 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 ));
- }
-
- FORGET_Frame();
-
- 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 ( FILE_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_Table: Font table is missing!\n" ));
- goto Exit;
- }
-
- header = &face->header;
-
- if ( 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_Table: 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 ( 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 ( 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 += 8;
- face->root.internal->max_contours += 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 ( ALLOC_ARRAY( *longs, num_longs, TT_LongMetrics ) ||
- ALLOC_ARRAY( *shorts, num_shorts, TT_ShortMetrics ) )
- goto Exit;
-
- if ( ACCESS_Frame( table_len ) )
- goto Exit;
-
- {
- TT_LongMetrics* cur = *longs;
- TT_LongMetrics* limit = cur + num_longs;
-
-
- for ( ; cur < limit; cur++ )
- {
- cur->advance = GET_UShort();
- cur->bearing = 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 = 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;
- }
- }
-
- FORGET_Frame();
-
- 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 ( 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 storageSize;
-
- TT_NameTable* names;
-
- const FT_Frame_Field name_table_fields[] =
- {
-#undef FT_STRUCTURE
-#define FT_STRUCTURE TT_NameTable
-
- FT_FRAME_START( 6 ),
- FT_FRAME_USHORT( format ),
- FT_FRAME_USHORT( numNameRecords ),
- FT_FRAME_USHORT( storageOffset ),
- FT_FRAME_END
- };
-
- const FT_Frame_Field name_record_fields[] =
- {
-#undef FT_STRUCTURE
-#define FT_STRUCTURE TT_NameRec
-
- /* 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
- };
-
-
- 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 = FILE_Pos();
-
- names = &face->name_table;
-
- if ( READ_Fields( name_table_fields, names ) )
- goto Exit;
-
- /* Allocate the array of name records. */
- if ( ALLOC_ARRAY( names->names,
- names->numNameRecords,
- TT_NameRec ) ||
- ACCESS_Frame( names->numNameRecords * 12L ) )
- goto Exit;
-
- /* Load the name records and determine how much storage is needed */
- /* to hold the strings themselves. */
- {
- TT_NameRec* cur = names->names;
- TT_NameRec* limit = cur + names->numNameRecords;
-
-
- storageSize = 0;
-
- for ( ; cur < limit; cur ++ )
- {
- FT_ULong upper;
-
-
- if ( READ_Fields( name_record_fields, cur ) )
- break;
-
- upper = (FT_ULong)( cur->stringOffset + cur->stringLength );
- if ( upper > storageSize )
- storageSize = upper;
- }
- }
-
- FORGET_Frame();
-
- if ( storageSize > 0 )
- {
- /* allocate the name storage area in memory, then read it */
- if ( ALLOC( names->storage, storageSize ) ||
- FILE_Read_At( table_pos + names->storageOffset,
- names->storage, storageSize ) )
- goto Exit;
-
- /* Go through and assign the string pointers to the name records. */
- {
- TT_NameRec* cur = names->names;
- TT_NameRec* limit = cur + names->numNameRecords;
-
-
- for ( ; cur < limit; cur++ )
- cur->string = names->storage + cur->stringOffset;
- }
-
-#ifdef FT_DEBUG_LEVEL_TRACE
-
- /* Print Name Record Table in case of debugging */
- {
- TT_NameRec* cur = names->names;
- TT_NameRec* limit = cur + names->numNameRecords;
-
-
- for ( ; cur < limit; cur++ )
- {
- FT_UInt j;
-
-
- FT_TRACE3(( "%d %d %x %d\n ",
- cur->platformID,
- cur->encodingID,
- cur->languageID,
- cur->nameID ));
-
- /* I know that M$ encoded strings are Unicode, */
- /* but this works reasonable well for debugging purposes. */
- if ( cur->string )
- for ( j = 0; j < (FT_UInt)cur->stringLength; j++ )
- {
- FT_Char c = *( cur->string + j );
-
-
- if ( (FT_Byte)c < 128 )
- FT_TRACE3(( "%c", c ));
- }
- }
- }
- FT_TRACE3(( "\n" ));
-
-#endif /* FT_DEBUG_LEVEL_TRACE */
-
- }
- FT_TRACE2(( "loaded\n" ));
-
- /* everything went well, update face->num_names */
- face->num_names = names->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* names = &face->name_table;
-
-
- /* free strings table */
- FREE( names->names );
-
- /* free strings storage */
- FREE( names->storage );
-
- names->numNameRecords = 0;
- names->format = 0;
- names->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. */
- /* */
- 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_CMapDir cmap_dir;
-
- const FT_Frame_Field cmap_fields[] =
- {
-#undef FT_STRUCTURE
-#define FT_STRUCTURE TT_CMapDir
-
- 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_CMapTable
-
- 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 = FILE_Pos();
-
- if ( READ_Fields( cmap_fields, &cmap_dir ) )
- goto Exit;
-
- /* reserve space in face table for cmap tables */
- if ( ALLOC_ARRAY( face->charmaps,
- cmap_dir.numCMaps,
- TT_CharMapRec ) )
- 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 ( ACCESS_Frame( 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 = GET_UShort();
- cmap->platformEncodingID = GET_UShort();
- cmap->offset = (FT_ULong)GET_Long();
- }
-
- FORGET_Frame();
-
- /* now read the rest of each table */
- for ( charmap = face->charmaps; charmap < limit; charmap++ )
- {
- TT_CMapTable* cmap = &charmap->cmap;
-
-
- if ( FILE_Seek( table_start + (FT_Long)cmap->offset ) ||
- READ_Fields( cmap_rec_fields, cmap ) )
- goto Exit;
-
- cmap->offset = FILE_Pos();
- }
- }
-
- FT_TRACE2(( "loaded\n" ));
-
- Exit:
- return error;
- }
-
-
- /*************************************************************************/
- /* */
- /* <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 = 0xFFFF;
- error = SFNT_Err_Ok;
- goto Exit;
- }
-
- os2 = &face->os2;
-
- if ( 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 ( READ_Fields( os2_fields_extra, os2 ) )
- goto Exit;
-
- if ( os2->version >= 0x0002 )
- {
- /* only version 2 tables */
- if ( 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 ( 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 ( 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 ( ACCESS_Frame( 4L ) )
- goto Exit;
-
- face->gasp.version = GET_UShort();
- face->gasp.numRanges = GET_UShort();
-
- FORGET_Frame();
-
- num_ranges = face->gasp.numRanges;
- FT_TRACE3(( "number of ranges = %d\n", num_ranges ));
-
- if ( ALLOC_ARRAY( gaspranges, num_ranges, TT_GaspRange ) ||
- ACCESS_Frame( num_ranges * 4L ) )
- goto Exit;
-
- face->gasp.gaspRanges = gaspranges;
-
- for ( j = 0; j < num_ranges; j++ )
- {
- gaspranges[j].maxPPEM = GET_UShort();
- gaspranges[j].gaspFlag = GET_UShort();
-
- FT_TRACE3(( " [max:%d flag:%d]",
- gaspranges[j].maxPPEM,
- gaspranges[j].gaspFlag ));
- }
- FT_TRACE3(( "\n" ));
-
- FORGET_Frame();
- 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 ( ACCESS_Frame( 4L ) )
- goto Exit;
-
- (void)GET_UShort(); /* version */
- num_tables = GET_UShort();
-
- FORGET_Frame();
-
- for ( n = 0; n < num_tables; n++ )
- {
- FT_UInt coverage;
- FT_UInt length;
-
-
- if ( ACCESS_Frame( 6L ) )
- goto Exit;
-
- (void)GET_UShort(); /* version */
- length = GET_UShort() - 6; /* substract header length */
- coverage = GET_UShort();
-
- FORGET_Frame();
-
- if ( coverage == 0x0001 )
- {
- FT_UInt num_pairs;
- TT_Kern_0_Pair* pair;
- TT_Kern_0_Pair* limit;
-
-
- /* found a horizontal format 0 kerning table! */
- if ( ACCESS_Frame( 8L ) )
- goto Exit;
-
- num_pairs = GET_UShort();
-
- /* skip the rest */
-
- FORGET_Frame();
-
- /* allocate array of kerning pairs */
- if ( ALLOC_ARRAY( face->kern_pairs, num_pairs, TT_Kern_0_Pair ) ||
- ACCESS_Frame( 6L * num_pairs ) )
- goto Exit;
-
- pair = face->kern_pairs;
- limit = pair + num_pairs;
- for ( ; pair < limit; pair++ )
- {
- pair->left = GET_UShort();
- pair->right = GET_UShort();
- pair->value = GET_UShort();
- }
-
- FORGET_Frame();
-
- 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_Kern_0_Pair* pair0;
-
-
- pair0 = face->kern_pairs;
-
- for ( i = 1; i < num_pairs; i++, pair0++ )
- {
- if ( tt_kern_pair_compare( pair0, pair0 + 1 ) != -1 )
- {
- qsort( (void*)face->kern_pairs, (int)num_pairs,
- sizeof ( TT_Kern_0_Pair ), tt_kern_pair_compare );
- break;
- }
- }
- }
-
- goto Exit;
- }
-
- if ( FILE_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_Kern_0_Pair* pair1 = (TT_Kern_0_Pair*)a;
- TT_Kern_0_Pair* pair2 = (TT_Kern_0_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 ( ACCESS_Frame( 8L ) )
- goto Exit;
-
- hdmx->version = GET_UShort();
- hdmx->num_records = GET_Short();
- record_size = GET_Long();
-
- FORGET_Frame();
-
- /* Only recognize format 0 */
- if ( hdmx->version != 0 )
- goto Exit;
-
- if ( ALLOC_ARRAY( hdmx->records, hdmx->num_records, TT_HdmxRec ) )
- goto Exit;
-
- num_glyphs = face->root.num_glyphs;
- record_size -= num_glyphs + 2;
-
- {
- TT_HdmxRec* cur = hdmx->records;
- TT_HdmxRec* limit = cur + hdmx->num_records;
-
-
- for ( ; cur < limit; cur++ )
- {
- /* read record */
- if ( READ_Byte( cur->ppem ) ||
- READ_Byte( cur->max_width ) )
- goto Exit;
-
- if ( ALLOC( cur->widths, num_glyphs ) ||
- FILE_Read( cur->widths, num_glyphs ) )
- goto Exit;
-
- /* skip padding bytes */
- if ( record_size > 0 && FILE_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++ )
- FREE( face->hdmx.records[n].widths );
-
- FREE( face->hdmx.records );
- face->hdmx.num_records = 0;
- }
- }
-
-
-/* END */
projects / rrdtool.git / blobdiff