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-rw-r--r--nx-X11/extras/freetype2/src/sfnt/ttcmap0.c1991
1 files changed, 0 insertions, 1991 deletions
diff --git a/nx-X11/extras/freetype2/src/sfnt/ttcmap0.c b/nx-X11/extras/freetype2/src/sfnt/ttcmap0.c
deleted file mode 100644
index dd1c76aaa..000000000
--- a/nx-X11/extras/freetype2/src/sfnt/ttcmap0.c
+++ /dev/null
@@ -1,1991 +0,0 @@
-/***************************************************************************/
-/* */
-/* ttcmap0.c */
-/* */
-/* TrueType new character mapping table (cmap) support (body). */
-/* */
-/* Copyright 2002, 2003 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_OBJECTS_H
-#include FT_INTERNAL_STREAM_H
-#include "ttload.h"
-#include "ttcmap0.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_ttcmap
-
-
-#define TT_PEEK_SHORT FT_PEEK_SHORT
-#define TT_PEEK_USHORT FT_PEEK_USHORT
-#define TT_PEEK_LONG FT_PEEK_LONG
-#define TT_PEEK_ULONG FT_PEEK_ULONG
-
-#define TT_NEXT_SHORT FT_NEXT_SHORT
-#define TT_NEXT_USHORT FT_NEXT_USHORT
-#define TT_NEXT_LONG FT_NEXT_LONG
-#define TT_NEXT_ULONG FT_NEXT_ULONG
-
-
- FT_CALLBACK_DEF( FT_Error )
- tt_cmap_init( TT_CMap cmap,
- FT_Byte* table )
- {
- cmap->data = table;
- return 0;
- }
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** FORMAT 0 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /*************************************************************************/
- /* */
- /* TABLE OVERVIEW */
- /* -------------- */
- /* */
- /* NAME OFFSET TYPE DESCRIPTION */
- /* */
- /* format 0 USHORT must be 0 */
- /* length 2 USHORT table length in bytes */
- /* language 4 USHORT Mac language code */
- /* glyph_ids 6 BYTE[256] array of glyph indices */
- /* 262 */
- /* */
-
-#ifdef TT_CONFIG_CMAP_FORMAT_0
-
- FT_CALLBACK_DEF( void )
- tt_cmap0_validate( FT_Byte* table,
- FT_Validator valid )
- {
- FT_Byte* p = table + 2;
- FT_UInt length = TT_NEXT_USHORT( p );
-
-
- if ( table + length > valid->limit || length < 262 )
- FT_INVALID_TOO_SHORT;
-
- /* check glyph indices whenever necessary */
- if ( valid->level >= FT_VALIDATE_TIGHT )
- {
- FT_UInt n, idx;
-
-
- p = table + 6;
- for ( n = 0; n < 256; n++ )
- {
- idx = *p++;
- if ( idx >= TT_VALID_GLYPH_COUNT( valid ) )
- FT_INVALID_GLYPH_ID;
- }
- }
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap0_char_index( TT_CMap cmap,
- FT_UInt32 char_code )
- {
- FT_Byte* table = cmap->data;
-
-
- return char_code < 256 ? table[6 + char_code] : 0;
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap0_char_next( TT_CMap cmap,
- FT_UInt32 *pchar_code )
- {
- FT_Byte* table = cmap->data;
- FT_UInt32 charcode = *pchar_code;
- FT_UInt32 result = 0;
- FT_UInt gindex = 0;
-
-
- table += 6; /* go to glyph ids */
- while ( ++charcode < 256 )
- {
- gindex = table[charcode];
- if ( gindex != 0 )
- {
- result = charcode;
- break;
- }
- }
-
- *pchar_code = result;
- return gindex;
- }
-
-
- FT_CALLBACK_DEF( FT_Error )
- tt_cmap0_get_info( TT_CMap cmap,
- TT_CMapInfo *cmap_info )
- {
- FT_Byte* p = cmap->data + 4;
-
-
- cmap_info->language = (FT_ULong)TT_PEEK_USHORT( p );
-
- return FT_Err_Ok;
- }
-
-
- FT_CALLBACK_TABLE_DEF
- const TT_CMap_ClassRec tt_cmap0_class_rec =
- {
- {
- sizeof( TT_CMapRec ),
-
- (FT_CMap_InitFunc) tt_cmap_init,
- (FT_CMap_DoneFunc) NULL,
- (FT_CMap_CharIndexFunc)tt_cmap0_char_index,
- (FT_CMap_CharNextFunc) tt_cmap0_char_next
- },
- 0,
- (TT_CMap_ValidateFunc) tt_cmap0_validate,
- (TT_CMap_Info_GetFunc) tt_cmap0_get_info
- };
-
-#endif /* TT_CONFIG_CMAP_FORMAT_0 */
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** FORMAT 2 *****/
- /***** *****/
- /***** This is used for certain CJK encodings that encode text in a *****/
- /***** mixed 8/16 bits encoding along the following lines: *****/
- /***** *****/
- /***** * Certain byte values correspond to an 8-bit character code *****/
- /***** (typically in the range 0..127 for ASCII compatibility). *****/
- /***** *****/
- /***** * Certain byte values signal the first byte of a 2-byte *****/
- /***** character code (but these values are also valid as the *****/
- /***** second byte of a 2-byte character). *****/
- /***** *****/
- /***** The following charmap lookup and iteration functions all *****/
- /***** assume that the value "charcode" correspond to following: *****/
- /***** *****/
- /***** - For one byte characters, "charcode" is simply the *****/
- /***** character code. *****/
- /***** *****/
- /***** - For two byte characters, "charcode" is the 2-byte *****/
- /***** character code in big endian format. More exactly: *****/
- /***** *****/
- /***** (charcode >> 8) is the first byte value *****/
- /***** (charcode & 0xFF) is the second byte value *****/
- /***** *****/
- /***** Note that not all values of "charcode" are valid according *****/
- /***** to these rules, and the function moderately check the *****/
- /***** arguments. *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /*************************************************************************/
- /* */
- /* TABLE OVERVIEW */
- /* -------------- */
- /* */
- /* NAME OFFSET TYPE DESCRIPTION */
- /* */
- /* format 0 USHORT must be 2 */
- /* length 2 USHORT table length in bytes */
- /* language 4 USHORT Mac language code */
- /* keys 6 USHORT[256] sub-header keys */
- /* subs 518 SUBHEAD[NSUBS] sub-headers array */
- /* glyph_ids 518+NSUB*8 USHORT[] glyph id array */
- /* */
- /* The `keys' table is used to map charcode high-bytes to sub-headers. */
- /* The value of `NSUBS' is the number of sub-headers defined in the */
- /* table and is computed by finding the maximum of the `keys' table. */
- /* */
- /* Note that for any n, `keys[n]' is a byte offset within the `subs' */
- /* table, i.e., it is the corresponding sub-header index multiplied */
- /* by 8. */
- /* */
- /* Each sub-header has the following format: */
- /* */
- /* NAME OFFSET TYPE DESCRIPTION */
- /* */
- /* first 0 USHORT first valid low-byte */
- /* count 2 USHORT number of valid low-bytes */
- /* delta 4 SHORT see below */
- /* offset 6 USHORT see below */
- /* */
- /* A sub-header defines, for each high-byte, the range of valid */
- /* low-bytes within the charmap. Note that the range defined by `first' */
- /* and `count' must be completely included in the interval [0..255] */
- /* according to the specification. */
- /* */
- /* If a character code is contained within a given sub-header, then */
- /* mapping it to a glyph index is done as follows: */
- /* */
- /* * The value of `offset' is read. This is a _byte_ distance from the */
- /* location of the `offset' field itself into a slice of the */
- /* `glyph_ids' table. Let's call it `slice' (it's a USHORT[] too). */
- /* */
- /* * The value `slice[char.lo - first]' is read. If it is 0, there is */
- /* no glyph for the charcode. Otherwise, the value of `delta' is */
- /* added to it (modulo 65536) to form a new glyph index. */
- /* */
- /* It is up to the validation routine to check that all offsets fall */
- /* within the glyph ids table (and not within the `subs' table itself or */
- /* outside of the CMap). */
- /* */
-
-#ifdef TT_CONFIG_CMAP_FORMAT_2
-
- FT_CALLBACK_DEF( void )
- tt_cmap2_validate( FT_Byte* table,
- FT_Validator valid )
- {
- FT_Byte* p = table + 2; /* skip format */
- FT_UInt length = TT_PEEK_USHORT( p );
- FT_UInt n, max_subs;
- FT_Byte* keys; /* keys table */
- FT_Byte* subs; /* sub-headers */
- FT_Byte* glyph_ids; /* glyph id array */
-
-
- if ( table + length > valid->limit || length < 6 + 512 )
- FT_INVALID_TOO_SHORT;
-
- keys = table + 6;
-
- /* parse keys to compute sub-headers count */
- p = keys;
- max_subs = 0;
- for ( n = 0; n < 256; n++ )
- {
- FT_UInt idx = TT_NEXT_USHORT( p );
-
-
- /* value must be multiple of 8 */
- if ( valid->level >= FT_VALIDATE_PARANOID && ( idx & 7 ) != 0 )
- FT_INVALID_DATA;
-
- idx >>= 3;
-
- if ( idx > max_subs )
- max_subs = idx;
- }
-
- FT_ASSERT( p == table + 518 );
-
- subs = p;
- glyph_ids = subs + (max_subs + 1) * 8;
- if ( glyph_ids > valid->limit )
- FT_INVALID_TOO_SHORT;
-
- /* parse sub-headers */
- for ( n = 0; n <= max_subs; n++ )
- {
- FT_UInt first_code, code_count, offset;
- FT_Int delta;
- FT_Byte* ids;
-
-
- first_code = TT_NEXT_USHORT( p );
- code_count = TT_NEXT_USHORT( p );
- delta = TT_NEXT_SHORT( p );
- offset = TT_NEXT_USHORT( p );
-
- /* check range within 0..255 */
- if ( valid->level >= FT_VALIDATE_PARANOID )
- {
- if ( first_code >= 256 || first_code + code_count > 256 )
- FT_INVALID_DATA;
- }
-
- /* check offset */
- if ( offset != 0 )
- {
- ids = p - 2 + offset;
- if ( ids < glyph_ids || ids + code_count*2 > table + length )
- FT_INVALID_OFFSET;
-
- /* check glyph ids */
- if ( valid->level >= FT_VALIDATE_TIGHT )
- {
- FT_Byte* limit = p + code_count * 2;
- FT_UInt idx;
-
-
- for ( ; p < limit; )
- {
- idx = TT_NEXT_USHORT( p );
- if ( idx != 0 )
- {
- idx = ( idx + delta ) & 0xFFFFU;
- if ( idx >= TT_VALID_GLYPH_COUNT( valid ) )
- FT_INVALID_GLYPH_ID;
- }
- }
- }
- }
- }
- }
-
-
- /* return sub header corresponding to a given character code */
- /* NULL on invalid charcode */
- static FT_Byte*
- tt_cmap2_get_subheader( FT_Byte* table,
- FT_UInt32 char_code )
- {
- FT_Byte* result = NULL;
-
-
- if ( char_code < 0x10000UL )
- {
- FT_UInt char_lo = (FT_UInt)( char_code & 0xFF );
- FT_UInt char_hi = (FT_UInt)( char_code >> 8 );
- FT_Byte* p = table + 6; /* keys table */
- FT_Byte* subs = table + 518; /* subheaders table */
- FT_Byte* sub;
-
-
- if ( char_hi == 0 )
- {
- /* an 8-bit character code -- we use subHeader 0 in this case */
- /* to test whether the character code is in the charmap */
- /* */
- sub = subs; /* jump to first sub-header */
-
- /* check that the sub-header for this byte is 0, which */
- /* indicates that it's really a valid one-byte value */
- /* Otherwise, return 0 */
- /* */
- p += char_lo * 2;
- if ( TT_PEEK_USHORT( p ) != 0 )
- goto Exit;
- }
- else
- {
- /* a 16-bit character code */
-
- /* jump to key entry */
- p += char_hi * 2;
- /* jump to sub-header */
- sub = subs + ( FT_PAD_FLOOR( TT_PEEK_USHORT( p ), 8 ) );
-
- /* check that the high byte isn't a valid one-byte value */
- if ( sub == subs )
- goto Exit;
- }
- result = sub;
- }
- Exit:
- return result;
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap2_char_index( TT_CMap cmap,
- FT_UInt32 char_code )
- {
- FT_Byte* table = cmap->data;
- FT_UInt result = 0;
- FT_Byte* subheader;
-
-
- subheader = tt_cmap2_get_subheader( table, char_code );
- if ( subheader )
- {
- FT_Byte* p = subheader;
- FT_UInt idx = (FT_UInt)(char_code & 0xFF);
- FT_UInt start, count;
- FT_Int delta;
- FT_UInt offset;
-
-
- start = TT_NEXT_USHORT( p );
- count = TT_NEXT_USHORT( p );
- delta = TT_NEXT_SHORT ( p );
- offset = TT_PEEK_USHORT( p );
-
- idx -= start;
- if ( idx < count && offset != 0 )
- {
- p += offset + 2 * idx;
- idx = TT_PEEK_USHORT( p );
-
- if ( idx != 0 )
- result = (FT_UInt)( idx + delta ) & 0xFFFFU;
- }
- }
- return result;
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap2_char_next( TT_CMap cmap,
- FT_UInt32 *pcharcode )
- {
- FT_Byte* table = cmap->data;
- FT_UInt gindex = 0;
- FT_UInt32 result = 0;
- FT_UInt32 charcode = *pcharcode + 1;
- FT_Byte* subheader;
-
-
- while ( charcode < 0x10000UL )
- {
- subheader = tt_cmap2_get_subheader( table, charcode );
- if ( subheader )
- {
- FT_Byte* p = subheader;
- FT_UInt start = TT_NEXT_USHORT( p );
- FT_UInt count = TT_NEXT_USHORT( p );
- FT_Int delta = TT_NEXT_SHORT ( p );
- FT_UInt offset = TT_PEEK_USHORT( p );
- FT_UInt char_lo = (FT_UInt)( charcode & 0xFF );
- FT_UInt pos, idx;
-
-
- if ( offset == 0 )
- goto Next_SubHeader;
-
- if ( char_lo < start )
- {
- char_lo = start;
- pos = 0;
- }
- else
- pos = (FT_UInt)( char_lo - start );
-
- p += offset + pos * 2;
- charcode = FT_PAD_FLOOR( charcode, 256 ) + char_lo;
-
- for ( ; pos < count; pos++, charcode++ )
- {
- idx = TT_NEXT_USHORT( p );
-
- if ( idx != 0 )
- {
- gindex = ( idx + delta ) & 0xFFFFU;
- if ( gindex != 0 )
- {
- result = charcode;
- goto Exit;
- }
- }
- }
- }
-
- /* jump to next sub-header, i.e. higher byte value */
- Next_SubHeader:
- charcode = FT_PAD_FLOOR( charcode, 256 ) + 256;
- }
-
- Exit:
- *pcharcode = result;
-
- return gindex;
- }
-
-
- FT_CALLBACK_DEF( FT_Error )
- tt_cmap2_get_info( TT_CMap cmap,
- TT_CMapInfo *cmap_info )
- {
- FT_Byte* p = cmap->data + 4;
-
-
- cmap_info->language = (FT_ULong)TT_PEEK_USHORT( p );
-
- return FT_Err_Ok;
- }
-
-
- FT_CALLBACK_TABLE_DEF
- const TT_CMap_ClassRec tt_cmap2_class_rec =
- {
- {
- sizeof( TT_CMapRec ),
-
- (FT_CMap_InitFunc) tt_cmap_init,
- (FT_CMap_DoneFunc) NULL,
- (FT_CMap_CharIndexFunc)tt_cmap2_char_index,
- (FT_CMap_CharNextFunc) tt_cmap2_char_next
- },
- 2,
- (TT_CMap_ValidateFunc) tt_cmap2_validate,
- (TT_CMap_Info_GetFunc) tt_cmap2_get_info
- };
-
-#endif /* TT_CONFIG_CMAP_FORMAT_2 */
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** FORMAT 4 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /*************************************************************************/
- /* */
- /* TABLE OVERVIEW */
- /* -------------- */
- /* */
- /* NAME OFFSET TYPE DESCRIPTION */
- /* */
- /* format 0 USHORT must be 4 */
- /* length 2 USHORT table length */
- /* in bytes */
- /* language 4 USHORT Mac language code */
- /* */
- /* segCountX2 6 USHORT 2*NUM_SEGS */
- /* searchRange 8 USHORT 2*(1 << LOG_SEGS) */
- /* entrySelector 10 USHORT LOG_SEGS */
- /* rangeShift 12 USHORT segCountX2 - */
- /* searchRange */
- /* */
- /* endCount 14 USHORT[NUM_SEGS] end charcode for */
- /* each segment; last */
- /* is 0xFFFF */
- /* */
- /* pad 14+NUM_SEGS*2 USHORT padding */
- /* */
- /* startCount 16+NUM_SEGS*2 USHORT[NUM_SEGS] first charcode for */
- /* each segment */
- /* */
- /* idDelta 16+NUM_SEGS*4 SHORT[NUM_SEGS] delta for each */
- /* segment */
- /* idOffset 16+NUM_SEGS*6 SHORT[NUM_SEGS] range offset for */
- /* each segment; can be */
- /* zero */
- /* */
- /* glyphIds 16+NUM_SEGS*8 USHORT[] array of glyph id */
- /* ranges */
- /* */
- /* Character codes are modelled by a series of ordered (increasing) */
- /* intervals called segments. Each segment has start and end codes, */
- /* provided by the `startCount' and `endCount' arrays. Segments must */
- /* not be overlapping and the last segment should always contain the */
- /* `0xFFFF' endCount. */
- /* */
- /* The fields `searchRange', `entrySelector' and `rangeShift' are better */
- /* ignored (they are traces of over-engineering in the TrueType */
- /* specification). */
- /* */
- /* Each segment also has a signed `delta', as well as an optional offset */
- /* within the `glyphIds' table. */
- /* */
- /* If a segment's idOffset is 0, the glyph index corresponding to any */
- /* charcode within the segment is obtained by adding the value of */
- /* `idDelta' directly to the charcode, modulo 65536. */
- /* */
- /* Otherwise, a glyph index is taken from the glyph ids sub-array for */
- /* the segment, and the value of `idDelta' is added to it. */
- /* */
- /* */
- /* Finally, note that certain fonts contain invalid charmaps that */
- /* contain end=0xFFFF, start=0xFFFF, delta=0x0001, offset=0xFFFF at the */
- /* of their charmaps (e.g. opens___.ttf which comes with OpenOffice.org) */
- /* we need special code to deal with them correctly... */
- /* */
-
-#ifdef TT_CONFIG_CMAP_FORMAT_4
-
- FT_CALLBACK_DEF( void )
- tt_cmap4_validate( FT_Byte* table,
- FT_Validator valid )
- {
- FT_Byte* p = table + 2; /* skip format */
- FT_UInt length = TT_NEXT_USHORT( p );
- FT_Byte *ends, *starts, *offsets, *deltas, *glyph_ids;
- FT_UInt num_segs;
-
-
- /* in certain fonts, the `length' field is invalid and goes */
- /* out of bound. We try to correct this here... */
- if ( length < 16 )
- FT_INVALID_TOO_SHORT;
-
- if ( table + length > valid->limit )
- {
- if ( valid->level >= FT_VALIDATE_TIGHT )
- FT_INVALID_TOO_SHORT;
-
- length = (FT_UInt)( valid->limit - table );
- }
-
- p = table + 6;
- num_segs = TT_NEXT_USHORT( p ); /* read segCountX2 */
-
- if ( valid->level >= FT_VALIDATE_PARANOID )
- {
- /* check that we have an even value here */
- if ( num_segs & 1 )
- FT_INVALID_DATA;
- }
-
- num_segs /= 2;
-
- /* check the search parameters - even though we never use them */
- /* */
- if ( valid->level >= FT_VALIDATE_PARANOID )
- {
- /* check the values of 'searchRange', 'entrySelector', 'rangeShift' */
- FT_UInt search_range = TT_NEXT_USHORT( p );
- FT_UInt entry_selector = TT_NEXT_USHORT( p );
- FT_UInt range_shift = TT_NEXT_USHORT( p );
-
-
- if ( ( search_range | range_shift ) & 1 ) /* must be even values */
- FT_INVALID_DATA;
-
- search_range /= 2;
- range_shift /= 2;
-
- /* `search range' is the greatest power of 2 that is <= num_segs */
-
- if ( search_range > num_segs ||
- search_range * 2 < num_segs ||
- search_range + range_shift != num_segs ||
- search_range != ( 1U << entry_selector ) )
- FT_INVALID_DATA;
- }
-
- ends = table + 14;
- starts = table + 16 + num_segs * 2;
- deltas = starts + num_segs * 2;
- offsets = deltas + num_segs * 2;
- glyph_ids = offsets + num_segs * 2;
-
- if ( glyph_ids > table + length )
- FT_INVALID_TOO_SHORT;
-
- /* check last segment, its end count must be FFFF */
- if ( valid->level >= FT_VALIDATE_PARANOID )
- {
- p = ends + ( num_segs - 1 ) * 2;
- if ( TT_PEEK_USHORT( p ) != 0xFFFFU )
- FT_INVALID_DATA;
- }
-
- /* check that segments are sorted in increasing order and do not */
- /* overlap; check also the offsets */
- {
- FT_UInt start, end, last = 0, offset, n;
- FT_Int delta;
-
-
- for ( n = 0; n < num_segs; n++ )
- {
- p = starts + n * 2;
- start = TT_PEEK_USHORT( p );
- p = ends + n * 2;
- end = TT_PEEK_USHORT( p );
- p = deltas + n * 2;
- delta = TT_PEEK_SHORT( p );
- p = offsets + n * 2;
- offset = TT_PEEK_USHORT( p );
-
- if ( start > end )
- FT_INVALID_DATA;
-
- /* this test should be performed at default validation level; */
- /* unfortunately, some popular Asian fonts present overlapping */
- /* ranges in their charmaps */
- /* */
- if ( valid->level >= FT_VALIDATE_TIGHT )
- {
- if ( n > 0 && start <= last )
- FT_INVALID_DATA;
- }
-
- if ( offset && offset != 0xFFFFU )
- {
- p += offset; /* start of glyph id array */
-
- /* check that we point within the glyph ids table only */
- if ( valid->level >= FT_VALIDATE_TIGHT )
- {
- if ( p < glyph_ids ||
- p + ( end - start + 1 ) * 2 > table + length )
- FT_INVALID_DATA;
- }
- else
- {
- if ( p < glyph_ids ||
- p + ( end - start + 1 ) * 2 > valid->limit )
- FT_INVALID_DATA;
- }
-
- /* check glyph indices within the segment range */
- if ( valid->level >= FT_VALIDATE_TIGHT )
- {
- FT_UInt i, idx;
-
-
- for ( i = start; i < end; i++ )
- {
- idx = FT_NEXT_USHORT( p );
- if ( idx != 0 )
- {
- idx = (FT_UInt)( idx + delta ) & 0xFFFFU;
-
- if ( idx >= TT_VALID_GLYPH_COUNT( valid ) )
- FT_INVALID_GLYPH_ID;
- }
- }
- }
- }
- else if ( offset == 0xFFFFU )
- {
- /* Some fonts (erroneously?) use a range offset of 0xFFFF */
- /* to mean missing glyph in cmap table */
- /* */
- if ( valid->level >= FT_VALIDATE_PARANOID ||
- n != num_segs - 1 ||
- !( start == 0xFFFFU && end == 0xFFFFU && delta == 0x1U ) )
- FT_INVALID_DATA;
- }
-
- last = end;
- }
- }
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap4_char_index( TT_CMap cmap,
- FT_UInt32 char_code )
- {
- FT_Byte* table = cmap->data;
- FT_UInt result = 0;
-
-
- if ( char_code < 0x10000UL )
- {
- FT_UInt idx, num_segs2;
- FT_Int delta;
- FT_UInt code = (FT_UInt)char_code;
- FT_Byte* p;
-
-
- p = table + 6;
- num_segs2 = FT_PAD_FLOOR( TT_PEEK_USHORT( p ), 2 ); /* be paranoid! */
-
-#if 1
- /* Some fonts have more than 170 segments in their charmaps! */
- /* We changed this function to use a more efficient binary */
- /* search for improving performance */
- {
- FT_UInt min = 0;
- FT_UInt max = num_segs2 >> 1;
- FT_UInt mid, start, end, offset;
-
-
- while ( min < max )
- {
- mid = ( min + max ) >> 1;
- p = table + 14 + mid * 2;
- end = TT_NEXT_USHORT( p );
- p += num_segs2;
- start = TT_PEEK_USHORT( p);
-
- if ( code < start )
- max = mid;
- else if ( code > end )
- min = mid + 1;
- else
- {
- /* we found the segment */
- idx = code;
-
- p += num_segs2;
- delta = TT_PEEK_SHORT( p );
-
- p += num_segs2;
- offset = TT_PEEK_USHORT( p );
-
- if ( offset == 0xFFFFU )
- goto Exit;
-
- if ( offset != 0 )
- {
- p += offset + 2 * ( idx - start );
- idx = TT_PEEK_USHORT( p );
- }
-
- if ( idx != 0 )
- result = (FT_UInt)( idx + delta ) & 0xFFFFU;
-
- goto Exit;
- }
- }
- }
-
-#else /* 0 - old code */
-
- {
- FT_UInt n;
- FT_Byte* q;
-
-
- p = table + 14; /* ends table */
- q = table + 16 + num_segs2; /* starts table */
-
-
- for ( n = 0; n < num_segs2; n += 2 )
- {
- FT_UInt end = TT_NEXT_USHORT( p );
- FT_UInt start = TT_NEXT_USHORT( q );
- FT_UInt offset;
-
-
- if ( code < start )
- break;
-
- if ( code <= end )
- {
- idx = code;
-
- p = q + num_segs2 - 2;
- delta = TT_PEEK_SHORT( p );
- p += num_segs2;
- offset = TT_PEEK_USHORT( p );
-
- if ( offset == 0xFFFFU )
- goto Exit;
-
- if ( offset != 0 )
- {
- p += offset + 2 * ( idx - start );
- idx = TT_PEEK_USHORT( p );
- }
-
- if ( idx != 0 )
- result = (FT_UInt)( idx + delta ) & 0xFFFFU;
- }
- }
- }
-
-#endif /* 0 */
-
- }
-
- Exit:
- return result;
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap4_char_next( TT_CMap cmap,
- FT_UInt32 *pchar_code )
- {
- FT_Byte* table = cmap->data;
- FT_UInt32 result = 0;
- FT_UInt gindex = 0;
- FT_UInt32 char_code = *pchar_code;
- FT_Byte* p;
- FT_UInt code, num_segs2;
-
-
- if ( char_code >= 0xFFFFUL )
- goto Exit;
-
- code = (FT_UInt)char_code + 1;
- p = table + 6;
- num_segs2 = FT_PAD_FLOOR( TT_PEEK_USHORT(p), 2 ); /* ensure even-ness */
-
-#if 1
-
- for (;;)
- {
- /* Some fonts have more than 170 segments in their charmaps! */
- /* We changed this function to use a more efficient binary */
- /* search */
- FT_UInt offset;
- FT_Int delta;
- FT_UInt min = 0;
- FT_UInt max = num_segs2 >> 1;
- FT_UInt mid, start, end;
- FT_UInt hi;
-
-
- /* we begin by finding the segment which end is
- closer to our code point */
- hi = max + 1;
- while ( min < max )
- {
- mid = ( min + max ) >> 1;
- p = table + 14 + mid * 2;
- end = TT_PEEK_USHORT( p );
-
- if ( end < code )
- min = mid + 1;
- else
- {
- hi = mid;
- max = mid;
- }
- }
-
- if ( hi > max )
- {
- /* the point is behind the last segment;
- we will exit right now */
- goto Exit;
- }
-
- p = table + 14 + hi * 2;
- end = TT_PEEK_USHORT( p );
-
- p += 2 + num_segs2;
- start = TT_PEEK_USHORT( p );
-
- if ( code < start )
- code = start;
-
- p += num_segs2;
- delta = TT_PEEK_USHORT( p );
-
- p += num_segs2;
- offset = TT_PEEK_USHORT( p );
-
- if ( offset != 0 && offset != 0xFFFFU )
- {
- /* parse the glyph ids array for non-zero index */
- p += offset + ( code - start ) * 2;
- while ( code <= end )
- {
- gindex = TT_NEXT_USHORT( p );
- if ( gindex != 0 )
- {
- gindex = (FT_UInt)( gindex + delta ) & 0xFFFFU;
- if ( gindex != 0 )
- {
- result = code;
- goto Exit;
- }
- }
- code++;
- }
- }
- else if ( offset == 0xFFFFU )
- {
- /* an offset of 0xFFFF means an empty glyph in certain fonts! */
- code = end + 1;
- }
- else /* offset == 0 */
- {
- gindex = (FT_UInt)( code + delta ) & 0xFFFFU;
- if ( gindex != 0 )
- {
- result = code;
- goto Exit;
- }
- code++;
- }
- }
-
-#else /* old code -- kept for reference */
-
- for ( ;; )
- {
- FT_UInt offset, n;
- FT_Int delta;
- FT_Byte* q;
-
-
- p = table + 14; /* ends table */
- q = table + 16 + num_segs2; /* starts table */
-
- for ( n = 0; n < num_segs2; n += 2 )
- {
- FT_UInt end = TT_NEXT_USHORT( p );
- FT_UInt start = TT_NEXT_USHORT( q );
-
-
- if ( code < start )
- code = start;
-
- if ( code <= end )
- {
- p = q + num_segs2 - 2;
- delta = TT_PEEK_SHORT( p );
- p += num_segs2;
- offset = TT_PEEK_USHORT( p );
-
- if ( offset != 0 && offset != 0xFFFFU )
- {
- /* parse the glyph ids array for non-0 index */
- p += offset + ( code - start ) * 2;
- while ( code <= end )
- {
- gindex = TT_NEXT_USHORT( p );
- if ( gindex != 0 )
- {
- gindex = (FT_UInt)( gindex + delta ) & 0xFFFFU;
- if ( gindex != 0 )
- break;
- }
- code++;
- }
- }
- else if ( offset == 0xFFFFU )
- {
- /* an offset of 0xFFFF means an empty glyph in certain fonts! */
- code = end;
- break;
- }
- else
- gindex = (FT_UInt)( code + delta ) & 0xFFFFU;
-
- if ( gindex == 0 )
- break;
-
- result = code;
- goto Exit;
- }
- }
- /* loop to next trial charcode */
- if ( code >= 0xFFFFU )
- break;
-
- code++;
- }
-
-#endif /* !1 */
-
- Exit:
- *pchar_code = result;
- return gindex;
- }
-
-
- FT_CALLBACK_DEF( FT_Error )
- tt_cmap4_get_info( TT_CMap cmap,
- TT_CMapInfo *cmap_info )
- {
- FT_Byte* p = cmap->data + 4;
-
-
- cmap_info->language = (FT_ULong)TT_PEEK_USHORT( p );
-
- return FT_Err_Ok;
- }
-
-
- FT_CALLBACK_TABLE_DEF
- const TT_CMap_ClassRec tt_cmap4_class_rec =
- {
- {
- sizeof ( TT_CMapRec ),
-
- (FT_CMap_InitFunc) tt_cmap_init,
- (FT_CMap_DoneFunc) NULL,
- (FT_CMap_CharIndexFunc)tt_cmap4_char_index,
- (FT_CMap_CharNextFunc) tt_cmap4_char_next
- },
- 4,
- (TT_CMap_ValidateFunc) tt_cmap4_validate,
- (TT_CMap_Info_GetFunc) tt_cmap4_get_info
- };
-
-#endif /* TT_CONFIG_CMAP_FORMAT_4 */
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** FORMAT 6 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /*************************************************************************/
- /* */
- /* TABLE OVERVIEW */
- /* -------------- */
- /* */
- /* NAME OFFSET TYPE DESCRIPTION */
- /* */
- /* format 0 USHORT must be 4 */
- /* length 2 USHORT table length in bytes */
- /* language 4 USHORT Mac language code */
- /* */
- /* first 6 USHORT first segment code */
- /* count 8 USHORT segment size in chars */
- /* glyphIds 10 USHORT[count] glyph ids */
- /* */
- /* A very simplified segment mapping. */
- /* */
-
-#ifdef TT_CONFIG_CMAP_FORMAT_6
-
- FT_CALLBACK_DEF( void )
- tt_cmap6_validate( FT_Byte* table,
- FT_Validator valid )
- {
- FT_Byte* p;
- FT_UInt length, count;
-
-
- if ( table + 10 > valid->limit )
- FT_INVALID_TOO_SHORT;
-
- p = table + 2;
- length = TT_NEXT_USHORT( p );
-
- p = table + 8; /* skip language and start index */
- count = TT_NEXT_USHORT( p );
-
- if ( table + length > valid->limit || length < 10 + count * 2 )
- FT_INVALID_TOO_SHORT;
-
- /* check glyph indices */
- if ( valid->level >= FT_VALIDATE_TIGHT )
- {
- FT_UInt gindex;
-
-
- for ( ; count > 0; count-- )
- {
- gindex = TT_NEXT_USHORT( p );
- if ( gindex >= TT_VALID_GLYPH_COUNT( valid ) )
- FT_INVALID_GLYPH_ID;
- }
- }
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap6_char_index( TT_CMap cmap,
- FT_UInt32 char_code )
- {
- FT_Byte* table = cmap->data;
- FT_UInt result = 0;
- FT_Byte* p = table + 6;
- FT_UInt start = TT_NEXT_USHORT( p );
- FT_UInt count = TT_NEXT_USHORT( p );
- FT_UInt idx = (FT_UInt)( char_code - start );
-
-
- if ( idx < count )
- {
- p += 2 * idx;
- result = TT_PEEK_USHORT( p );
- }
- return result;
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap6_char_next( TT_CMap cmap,
- FT_UInt32 *pchar_code )
- {
- FT_Byte* table = cmap->data;
- FT_UInt32 result = 0;
- FT_UInt32 char_code = *pchar_code + 1;
- FT_UInt gindex = 0;
-
- FT_Byte* p = table + 6;
- FT_UInt start = TT_NEXT_USHORT( p );
- FT_UInt count = TT_NEXT_USHORT( p );
- FT_UInt idx;
-
-
- if ( char_code >= 0x10000UL )
- goto Exit;
-
- if ( char_code < start )
- char_code = start;
-
- idx = (FT_UInt)( char_code - start );
- p += 2 * idx;
-
- for ( ; idx < count; idx++ )
- {
- gindex = TT_NEXT_USHORT( p );
- if ( gindex != 0 )
- {
- result = char_code;
- break;
- }
- char_code++;
- }
-
- Exit:
- *pchar_code = result;
- return gindex;
- }
-
-
- FT_CALLBACK_DEF( FT_Error )
- tt_cmap6_get_info( TT_CMap cmap,
- TT_CMapInfo *cmap_info )
- {
- FT_Byte* p = cmap->data + 4;
-
-
- cmap_info->language = (FT_ULong)TT_PEEK_USHORT( p );
-
- return FT_Err_Ok;
- }
-
-
- FT_CALLBACK_TABLE_DEF
- const TT_CMap_ClassRec tt_cmap6_class_rec =
- {
- {
- sizeof ( TT_CMapRec ),
-
- (FT_CMap_InitFunc) tt_cmap_init,
- (FT_CMap_DoneFunc) NULL,
- (FT_CMap_CharIndexFunc)tt_cmap6_char_index,
- (FT_CMap_CharNextFunc) tt_cmap6_char_next
- },
- 6,
- (TT_CMap_ValidateFunc) tt_cmap6_validate,
- (TT_CMap_Info_GetFunc) tt_cmap6_get_info
- };
-
-#endif /* TT_CONFIG_CMAP_FORMAT_6 */
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** FORMAT 8 *****/
- /***** *****/
- /***** It's hard to completely understand what the OpenType spec *****/
- /***** says about this format, but here is my conclusion. *****/
- /***** *****/
- /***** The purpose of this format is to easily map UTF-16 text to *****/
- /***** glyph indices. Basically, the `char_code' must be in one of *****/
- /***** the following formats: *****/
- /***** *****/
- /***** - A 16-bit value that isn't part of the Unicode Surrogates *****/
- /***** Area (i.e. U+D800-U+DFFF). *****/
- /***** *****/
- /***** - A 32-bit value, made of two surrogate values, i.e.. if *****/
- /***** `char_code = (char_hi << 16) | char_lo', then both *****/
- /***** `char_hi' and `char_lo' must be in the Surrogates Area. *****/
- /***** Area. *****/
- /***** *****/
- /***** The 'is32' table embedded in the charmap indicates whether a *****/
- /***** given 16-bit value is in the surrogates area or not. *****/
- /***** *****/
- /***** So, for any given `char_code', we can assert the following: *****/
- /***** *****/
- /***** If `char_hi == 0' then we must have `is32[char_lo] == 0'. *****/
- /***** *****/
- /***** If `char_hi != 0' then we must have both *****/
- /***** `is32[char_hi] != 0' and `is32[char_lo] != 0'. *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /*************************************************************************/
- /* */
- /* TABLE OVERVIEW */
- /* -------------- */
- /* */
- /* NAME OFFSET TYPE DESCRIPTION */
- /* */
- /* format 0 USHORT must be 8 */
- /* reseved 2 USHORT reserved */
- /* length 4 ULONG length in bytes */
- /* language 8 ULONG Mac language code */
- /* is32 12 BYTE[8192] 32-bitness bitmap */
- /* count 8204 ULONG number of groups */
- /* */
- /* This header is followed by 'count' groups of the following format: */
- /* */
- /* start 0 ULONG first charcode */
- /* end 4 ULONG last charcode */
- /* startId 8 ULONG start glyph id for the group */
- /* */
-
-#ifdef TT_CONFIG_CMAP_FORMAT_8
-
- FT_CALLBACK_DEF( void )
- tt_cmap8_validate( FT_Byte* table,
- FT_Validator valid )
- {
- FT_Byte* p = table + 4;
- FT_Byte* is32;
- FT_UInt32 length;
- FT_UInt32 num_groups;
-
-
- if ( table + 16 + 8192 > valid->limit )
- FT_INVALID_TOO_SHORT;
-
- length = TT_NEXT_ULONG( p );
- if ( table + length > valid->limit || length < 8208 )
- FT_INVALID_TOO_SHORT;
-
- is32 = table + 12;
- p = is32 + 8192; /* skip `is32' array */
- num_groups = TT_NEXT_ULONG( p );
-
- if ( p + num_groups * 12 > valid->limit )
- FT_INVALID_TOO_SHORT;
-
- /* check groups, they must be in increasing order */
- {
- FT_UInt32 n, start, end, start_id, count, last = 0;
-
-
- for ( n = 0; n < num_groups; n++ )
- {
- FT_UInt hi, lo;
-
-
- start = TT_NEXT_ULONG( p );
- end = TT_NEXT_ULONG( p );
- start_id = TT_NEXT_ULONG( p );
-
- if ( start > end )
- FT_INVALID_DATA;
-
- if ( n > 0 && start <= last )
- FT_INVALID_DATA;
-
- if ( valid->level >= FT_VALIDATE_TIGHT )
- {
- if ( start_id + end - start >= TT_VALID_GLYPH_COUNT( valid ) )
- FT_INVALID_GLYPH_ID;
-
- count = (FT_UInt32)( end - start + 1 );
-
- if ( start & ~0xFFFFU )
- {
- /* start_hi != 0; check that is32[i] is 1 for each i in */
- /* the `hi' and `lo' of the range [start..end] */
- for ( ; count > 0; count--, start++ )
- {
- hi = (FT_UInt)( start >> 16 );
- lo = (FT_UInt)( start & 0xFFFFU );
-
- if ( (is32[hi >> 3] & ( 0x80 >> ( hi & 7 ) ) ) == 0 )
- FT_INVALID_DATA;
-
- if ( (is32[lo >> 3] & ( 0x80 >> ( lo & 7 ) ) ) == 0 )
- FT_INVALID_DATA;
- }
- }
- else
- {
- /* start_hi == 0; check that is32[i] is 0 for each i in */
- /* the range [start..end] */
-
- /* end_hi cannot be != 0! */
- if ( end & ~0xFFFFU )
- FT_INVALID_DATA;
-
- for ( ; count > 0; count--, start++ )
- {
- lo = (FT_UInt)( start & 0xFFFFU );
-
- if ( (is32[lo >> 3] & ( 0x80 >> ( lo & 7 ) ) ) != 0 )
- FT_INVALID_DATA;
- }
- }
- }
-
- last = end;
- }
- }
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap8_char_index( TT_CMap cmap,
- FT_UInt32 char_code )
- {
- FT_Byte* table = cmap->data;
- FT_UInt result = 0;
- FT_Byte* p = table + 8204;
- FT_UInt32 num_groups = TT_NEXT_ULONG( p );
- FT_UInt32 start, end, start_id;
-
-
- for ( ; num_groups > 0; num_groups-- )
- {
- start = TT_NEXT_ULONG( p );
- end = TT_NEXT_ULONG( p );
- start_id = TT_NEXT_ULONG( p );
-
- if ( char_code < start )
- break;
-
- if ( char_code <= end )
- {
- result = (FT_UInt)( start_id + char_code - start );
- break;
- }
- }
- return result;
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap8_char_next( TT_CMap cmap,
- FT_UInt32 *pchar_code )
- {
- FT_UInt32 result = 0;
- FT_UInt32 char_code = *pchar_code + 1;
- FT_UInt gindex = 0;
- FT_Byte* table = cmap->data;
- FT_Byte* p = table + 8204;
- FT_UInt32 num_groups = TT_NEXT_ULONG( p );
- FT_UInt32 start, end, start_id;
-
-
- p = table + 8208;
-
- for ( ; num_groups > 0; num_groups-- )
- {
- start = TT_NEXT_ULONG( p );
- end = TT_NEXT_ULONG( p );
- start_id = TT_NEXT_ULONG( p );
-
- if ( char_code < start )
- char_code = start;
-
- if ( char_code <= end )
- {
- gindex = (FT_UInt)( char_code - start + start_id );
- if ( gindex != 0 )
- {
- result = char_code;
- goto Exit;
- }
- }
- }
-
- Exit:
- *pchar_code = result;
- return gindex;
- }
-
-
- FT_CALLBACK_DEF( FT_Error )
- tt_cmap8_get_info( TT_CMap cmap,
- TT_CMapInfo *cmap_info )
- {
- FT_Byte* p = cmap->data + 8;
-
-
- cmap_info->language = (FT_ULong)TT_PEEK_ULONG( p );
- return FT_Err_Ok;
- }
-
-
- FT_CALLBACK_TABLE_DEF
- const TT_CMap_ClassRec tt_cmap8_class_rec =
- {
- {
- sizeof ( TT_CMapRec ),
-
- (FT_CMap_InitFunc) tt_cmap_init,
- (FT_CMap_DoneFunc) NULL,
- (FT_CMap_CharIndexFunc)tt_cmap8_char_index,
- (FT_CMap_CharNextFunc) tt_cmap8_char_next
- },
- 8,
- (TT_CMap_ValidateFunc) tt_cmap8_validate,
- (TT_CMap_Info_GetFunc) tt_cmap8_get_info
- };
-
-#endif /* TT_CONFIG_CMAP_FORMAT_8 */
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** FORMAT 10 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /*************************************************************************/
- /* */
- /* TABLE OVERVIEW */
- /* -------------- */
- /* */
- /* NAME OFFSET TYPE DESCRIPTION */
- /* */
- /* format 0 USHORT must be 10 */
- /* reserved 2 USHORT reserved */
- /* length 4 ULONG length in bytes */
- /* language 8 ULONG Mac language code */
- /* */
- /* start 12 ULONG first char in range */
- /* count 16 ULONG number of chars in range */
- /* glyphIds 20 USHORT[count] glyph indices covered */
- /* */
-
-#ifdef TT_CONFIG_CMAP_FORMAT_10
-
- FT_CALLBACK_DEF( void )
- tt_cmap10_validate( FT_Byte* table,
- FT_Validator valid )
- {
- FT_Byte* p = table + 4;
- FT_ULong length, count;
-
-
- if ( table + 20 > valid->limit )
- FT_INVALID_TOO_SHORT;
-
- length = TT_NEXT_ULONG( p );
- p = table + 16;
- count = TT_NEXT_ULONG( p );
-
- if ( table + length > valid->limit || length < 20 + count * 2 )
- FT_INVALID_TOO_SHORT;
-
- /* check glyph indices */
- if ( valid->level >= FT_VALIDATE_TIGHT )
- {
- FT_UInt gindex;
-
-
- for ( ; count > 0; count-- )
- {
- gindex = TT_NEXT_USHORT( p );
- if ( gindex >= TT_VALID_GLYPH_COUNT( valid ) )
- FT_INVALID_GLYPH_ID;
- }
- }
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap10_char_index( TT_CMap cmap,
- FT_UInt32 char_code )
- {
- FT_Byte* table = cmap->data;
- FT_UInt result = 0;
- FT_Byte* p = table + 12;
- FT_UInt32 start = TT_NEXT_ULONG( p );
- FT_UInt32 count = TT_NEXT_ULONG( p );
- FT_UInt32 idx = (FT_ULong)( char_code - start );
-
-
- if ( idx < count )
- {
- p += 2 * idx;
- result = TT_PEEK_USHORT( p );
- }
- return result;
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap10_char_next( TT_CMap cmap,
- FT_UInt32 *pchar_code )
- {
- FT_Byte* table = cmap->data;
- FT_UInt32 char_code = *pchar_code + 1;
- FT_UInt gindex = 0;
- FT_Byte* p = table + 12;
- FT_UInt32 start = TT_NEXT_ULONG( p );
- FT_UInt32 count = TT_NEXT_ULONG( p );
- FT_UInt32 idx;
-
-
- if ( char_code < start )
- char_code = start;
-
- idx = (FT_UInt32)( char_code - start );
- p += 2 * idx;
-
- for ( ; idx < count; idx++ )
- {
- gindex = TT_NEXT_USHORT( p );
- if ( gindex != 0 )
- break;
- char_code++;
- }
-
- *pchar_code = char_code;
- return gindex;
- }
-
-
- FT_CALLBACK_DEF( FT_Error )
- tt_cmap10_get_info( TT_CMap cmap,
- TT_CMapInfo *cmap_info )
- {
- FT_Byte* p = cmap->data + 8;
-
-
- cmap_info->language = (FT_ULong)TT_PEEK_ULONG( p );
-
- return FT_Err_Ok;
- }
-
-
- FT_CALLBACK_TABLE_DEF
- const TT_CMap_ClassRec tt_cmap10_class_rec =
- {
- {
- sizeof ( TT_CMapRec ),
-
- (FT_CMap_InitFunc) tt_cmap_init,
- (FT_CMap_DoneFunc) NULL,
- (FT_CMap_CharIndexFunc)tt_cmap10_char_index,
- (FT_CMap_CharNextFunc) tt_cmap10_char_next
- },
- 10,
- (TT_CMap_ValidateFunc) tt_cmap10_validate,
- (TT_CMap_Info_GetFunc) tt_cmap10_get_info
- };
-
-#endif /* TT_CONFIG_CMAP_FORMAT_10 */
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** FORMAT 12 *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
- /*************************************************************************/
- /* */
- /* TABLE OVERVIEW */
- /* -------------- */
- /* */
- /* NAME OFFSET TYPE DESCRIPTION */
- /* */
- /* format 0 USHORT must be 12 */
- /* reserved 2 USHORT reserved */
- /* length 4 ULONG length in bytes */
- /* language 8 ULONG Mac language code */
- /* count 12 ULONG number of groups */
- /* 16 */
- /* */
- /* This header is followed by `count' groups of the following format: */
- /* */
- /* start 0 ULONG first charcode */
- /* end 4 ULONG last charcode */
- /* startId 8 ULONG start glyph id for the group */
- /* */
-
-#ifdef TT_CONFIG_CMAP_FORMAT_12
-
- FT_CALLBACK_DEF( void )
- tt_cmap12_validate( FT_Byte* table,
- FT_Validator valid )
- {
- FT_Byte* p;
- FT_ULong length;
- FT_ULong num_groups;
-
-
- if ( table + 16 > valid->limit )
- FT_INVALID_TOO_SHORT;
-
- p = table + 4;
- length = TT_NEXT_ULONG( p );
-
- p = table + 12;
- num_groups = TT_NEXT_ULONG( p );
-
- if ( table + length > valid->limit || length < 16 + 12 * num_groups )
- FT_INVALID_TOO_SHORT;
-
- /* check groups, they must be in increasing order */
- {
- FT_ULong n, start, end, start_id, last = 0;
-
-
- for ( n = 0; n < num_groups; n++ )
- {
- start = TT_NEXT_ULONG( p );
- end = TT_NEXT_ULONG( p );
- start_id = TT_NEXT_ULONG( p );
-
- if ( start > end )
- FT_INVALID_DATA;
-
- if ( n > 0 && start <= last )
- FT_INVALID_DATA;
-
- if ( valid->level >= FT_VALIDATE_TIGHT )
- {
- if ( start_id + end - start >= TT_VALID_GLYPH_COUNT( valid ) )
- FT_INVALID_GLYPH_ID;
- }
-
- last = end;
- }
- }
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap12_char_index( TT_CMap cmap,
- FT_UInt32 char_code )
- {
- FT_UInt result = 0;
- FT_Byte* table = cmap->data;
- FT_Byte* p = table + 12;
- FT_UInt32 num_groups = TT_NEXT_ULONG( p );
- FT_UInt32 start, end, start_id;
-
-
- for ( ; num_groups > 0; num_groups-- )
- {
- start = TT_NEXT_ULONG( p );
- end = TT_NEXT_ULONG( p );
- start_id = TT_NEXT_ULONG( p );
-
- if ( char_code < start )
- break;
-
- if ( char_code <= end )
- {
- result = (FT_UInt)( start_id + char_code - start );
- break;
- }
- }
- return result;
- }
-
-
- FT_CALLBACK_DEF( FT_UInt )
- tt_cmap12_char_next( TT_CMap cmap,
- FT_UInt32 *pchar_code )
- {
- FT_Byte* table = cmap->data;
- FT_UInt32 result = 0;
- FT_UInt32 char_code = *pchar_code + 1;
- FT_UInt gindex = 0;
- FT_Byte* p = table + 12;
- FT_UInt32 num_groups = TT_NEXT_ULONG( p );
- FT_UInt32 start, end, start_id;
-
-
- p = table + 16;
-
- for ( ; num_groups > 0; num_groups-- )
- {
- start = TT_NEXT_ULONG( p );
- end = TT_NEXT_ULONG( p );
- start_id = TT_NEXT_ULONG( p );
-
- if ( char_code < start )
- char_code = start;
-
- if ( char_code <= end )
- {
- gindex = (FT_UInt)(char_code - start + start_id);
- if ( gindex != 0 )
- {
- result = char_code;
- goto Exit;
- }
- }
- }
-
- Exit:
- *pchar_code = result;
- return gindex;
- }
-
-
- FT_CALLBACK_DEF( FT_Error )
- tt_cmap12_get_info( TT_CMap cmap,
- TT_CMapInfo *cmap_info )
- {
- FT_Byte* p = cmap->data + 8;
-
-
- cmap_info->language = (FT_ULong)TT_PEEK_ULONG( p );
-
- return FT_Err_Ok;
- }
-
-
- FT_CALLBACK_TABLE_DEF
- const TT_CMap_ClassRec tt_cmap12_class_rec =
- {
- {
- sizeof ( TT_CMapRec ),
-
- (FT_CMap_InitFunc) tt_cmap_init,
- (FT_CMap_DoneFunc) NULL,
- (FT_CMap_CharIndexFunc)tt_cmap12_char_index,
- (FT_CMap_CharNextFunc) tt_cmap12_char_next
- },
- 12,
- (TT_CMap_ValidateFunc) tt_cmap12_validate,
- (TT_CMap_Info_GetFunc) tt_cmap12_get_info
- };
-
-
-#endif /* TT_CONFIG_CMAP_FORMAT_12 */
-
-
- static const TT_CMap_Class tt_cmap_classes[] =
- {
-#ifdef TT_CONFIG_CMAP_FORMAT_0
- &tt_cmap0_class_rec,
-#endif
-
-#ifdef TT_CONFIG_CMAP_FORMAT_2
- &tt_cmap2_class_rec,
-#endif
-
-#ifdef TT_CONFIG_CMAP_FORMAT_4
- &tt_cmap4_class_rec,
-#endif
-
-#ifdef TT_CONFIG_CMAP_FORMAT_6
- &tt_cmap6_class_rec,
-#endif
-
-#ifdef TT_CONFIG_CMAP_FORMAT_8
- &tt_cmap8_class_rec,
-#endif
-
-#ifdef TT_CONFIG_CMAP_FORMAT_10
- &tt_cmap10_class_rec,
-#endif
-
-#ifdef TT_CONFIG_CMAP_FORMAT_12
- &tt_cmap12_class_rec,
-#endif
-
- NULL,
- };
-
-
- /* parse the `cmap' table and build the corresponding TT_CMap objects */
- /* in the current face */
- /* */
- FT_LOCAL_DEF( FT_Error )
- tt_face_build_cmaps( TT_Face face )
- {
- FT_Byte* table = face->cmap_table;
- FT_Byte* limit = table + face->cmap_size;
- FT_UInt volatile num_cmaps;
- FT_Byte* volatile p = table;
-
-
- if ( p + 4 > limit )
- return SFNT_Err_Invalid_Table;
-
- /* only recognize format 0 */
- if ( TT_NEXT_USHORT( p ) != 0 )
- {
- p -= 2;
- FT_ERROR(( "tt_face_build_cmaps: unsupported `cmap' table format = %d\n",
- TT_PEEK_USHORT( p ) ));
- return SFNT_Err_Invalid_Table;
- }
-
- num_cmaps = TT_NEXT_USHORT( p );
-
- for ( ; num_cmaps > 0 && p + 8 <= limit; num_cmaps-- )
- {
- FT_CharMapRec charmap;
- FT_UInt32 offset;
-
-
- charmap.platform_id = TT_NEXT_USHORT( p );
- charmap.encoding_id = TT_NEXT_USHORT( p );
- charmap.face = FT_FACE( face );
- charmap.encoding = FT_ENCODING_NONE; /* will be filled later */
- offset = TT_NEXT_ULONG( p );
-
- if ( offset && table + offset + 2 < limit )
- {
- FT_Byte* cmap = table + offset;
- volatile FT_UInt format = TT_PEEK_USHORT( cmap );
- const TT_CMap_Class* volatile pclazz = tt_cmap_classes;
- TT_CMap_Class clazz;
-
-
- for ( ; *pclazz; pclazz++ )
- {
- clazz = *pclazz;
- if ( clazz->format == format )
- {
- volatile TT_ValidatorRec valid;
-
-
- ft_validator_init( FT_VALIDATOR( &valid ), cmap, limit,
- FT_VALIDATE_DEFAULT );
-
- valid.num_glyphs = (FT_UInt)face->root.num_glyphs;
-
- if ( ft_setjmp( FT_VALIDATOR( &valid )->jump_buffer ) == 0 )
- {
- /* validate this cmap sub-table */
- clazz->validate( cmap, FT_VALIDATOR( &valid ) );
- }
-
- if ( valid.validator.error == 0 )
- (void)FT_CMap_New( (FT_CMap_Class)clazz, cmap, &charmap, NULL );
- else
- {
- FT_ERROR(( "tt_face_build_cmaps:" ));
- FT_ERROR(( " broken cmap sub-table ignored!\n" ));
- }
- break;
- }
- }
- }
- }
-
- return 0;
- }
-
-
- FT_LOCAL( FT_Error )
- tt_get_cmap_info( FT_CharMap charmap,
- TT_CMapInfo *cmap_info )
- {
- FT_CMap cmap = (FT_CMap)charmap;
- TT_CMap_Class clazz = (TT_CMap_Class)cmap->clazz;
-
-
- return clazz->get_cmap_info( charmap, cmap_info );
- }
-
-
-/* END */
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-23 21:02:46 +0000