diff options
Diffstat (limited to 'nx-X11/extras/freetype2/src/cff/cffcmap.c')
| -rw-r--r-- | nx-X11/extras/freetype2/src/cff/cffcmap.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/nx-X11/extras/freetype2/src/cff/cffcmap.c b/nx-X11/extras/freetype2/src/cff/cffcmap.c new file mode 100644 index 000000000..82e04d236 --- /dev/null +++ b/nx-X11/extras/freetype2/src/cff/cffcmap.c @@ -0,0 +1,326 @@ +/***************************************************************************/ +/* */ +/* cffcmap.c */ +/* */ +/* CFF character mapping table (cmap) support (body). */ +/* */ +/* Copyright 2002, 2003, 2004 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 "cffcmap.h" +#include "cffload.h" + +#include "cfferrs.h" + + + /*************************************************************************/ + /*************************************************************************/ + /***** *****/ + /***** CFF STANDARD (AND EXPERT) ENCODING CMAPS *****/ + /***** *****/ + /*************************************************************************/ + /*************************************************************************/ + + FT_CALLBACK_DEF( FT_Error ) + cff_cmap_encoding_init( CFF_CMapStd cmap ) + { + TT_Face face = (TT_Face)FT_CMAP_FACE( cmap ); + CFF_Font cff = (CFF_Font)face->extra.data; + CFF_Encoding encoding = &cff->encoding; + + + cmap->gids = encoding->codes; + + return 0; + } + + + FT_CALLBACK_DEF( void ) + cff_cmap_encoding_done( CFF_CMapStd cmap ) + { + cmap->gids = NULL; + } + + + FT_CALLBACK_DEF( FT_UInt ) + cff_cmap_encoding_char_index( CFF_CMapStd cmap, + FT_UInt32 char_code ) + { + FT_UInt result = 0; + + + if ( char_code < 256 ) + result = cmap->gids[char_code]; + + return result; + } + + + FT_CALLBACK_DEF( FT_UInt ) + cff_cmap_encoding_char_next( CFF_CMapStd cmap, + FT_UInt32 *pchar_code ) + { + FT_UInt result = 0; + FT_UInt32 char_code = *pchar_code; + + + *pchar_code = 0; + + if ( char_code < 255 ) + { + FT_UInt code = (FT_UInt)(char_code + 1); + + + for (;;) + { + if ( code >= 256 ) + break; + + result = cmap->gids[code]; + if ( result != 0 ) + { + *pchar_code = code; + break; + } + + code++; + } + } + return result; + } + + + FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec + cff_cmap_encoding_class_rec = + { + sizeof ( CFF_CMapStdRec ), + + (FT_CMap_InitFunc) cff_cmap_encoding_init, + (FT_CMap_DoneFunc) cff_cmap_encoding_done, + (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index, + (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next + }; + + + /*************************************************************************/ + /*************************************************************************/ + /***** *****/ + /***** CFF SYNTHETIC UNICODE ENCODING CMAP *****/ + /***** *****/ + /*************************************************************************/ + /*************************************************************************/ + + FT_CALLBACK_DEF( FT_Int ) + cff_cmap_uni_pair_compare( const void* pair1, + const void* pair2 ) + { + FT_UInt32 u1 = ((CFF_CMapUniPair)pair1)->unicode; + FT_UInt32 u2 = ((CFF_CMapUniPair)pair2)->unicode; + + + if ( u1 < u2 ) + return -1; + + if ( u1 > u2 ) + return +1; + + return 0; + } + + + FT_CALLBACK_DEF( FT_Error ) + cff_cmap_unicode_init( CFF_CMapUnicode cmap ) + { + FT_Error error; + FT_UInt count; + TT_Face face = (TT_Face)FT_CMAP_FACE( cmap ); + FT_Memory memory = FT_FACE_MEMORY( face ); + CFF_Font cff = (CFF_Font)face->extra.data; + CFF_Charset charset = &cff->charset; + FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; + + + cmap->num_pairs = 0; + cmap->pairs = NULL; + + count = cff->num_glyphs; + + if ( !FT_NEW_ARRAY( cmap->pairs, count ) ) + { + FT_UInt n, new_count; + CFF_CMapUniPair pair; + FT_UInt32 uni_code; + + + pair = cmap->pairs; + for ( n = 0; n < count; n++ ) + { + FT_UInt sid = charset->sids[n]; + const char* gname; + + + gname = cff_index_get_sid_string( &cff->string_index, sid, psnames ); + + /* build unsorted pair table by matching glyph names */ + if ( gname ) + { + uni_code = psnames->unicode_value( gname ); + + if ( uni_code != 0 ) + { + pair->unicode = uni_code; + pair->gindex = n; + pair++; + } + + FT_FREE( gname ); + } + } + + new_count = (FT_UInt)( pair - cmap->pairs ); + if ( new_count == 0 ) + { + /* there are no unicode characters in here! */ + FT_FREE( cmap->pairs ); + error = CFF_Err_Invalid_Argument; + } + else + { + /* re-allocate if the new array is much smaller than the original */ + /* one */ + if ( new_count != count && new_count < count / 2 ) + { + (void)FT_RENEW_ARRAY( cmap->pairs, count, new_count ); + error = CFF_Err_Ok; + } + + /* sort the pairs table to allow efficient binary searches */ + ft_qsort( cmap->pairs, + new_count, + sizeof ( CFF_CMapUniPairRec ), + cff_cmap_uni_pair_compare ); + + cmap->num_pairs = new_count; + } + } + + return error; + } + + + FT_CALLBACK_DEF( void ) + cff_cmap_unicode_done( CFF_CMapUnicode cmap ) + { + FT_Face face = FT_CMAP_FACE( cmap ); + FT_Memory memory = FT_FACE_MEMORY( face ); + + + FT_FREE( cmap->pairs ); + cmap->num_pairs = 0; + } + + + FT_CALLBACK_DEF( FT_UInt ) + cff_cmap_unicode_char_index( CFF_CMapUnicode cmap, + FT_UInt32 char_code ) + { + FT_UInt min = 0; + FT_UInt max = cmap->num_pairs; + FT_UInt mid; + CFF_CMapUniPair pair; + + + while ( min < max ) + { + mid = min + ( max - min ) / 2; + pair = cmap->pairs + mid; + + if ( pair->unicode == char_code ) + return pair->gindex; + + if ( pair->unicode < char_code ) + min = mid + 1; + else + max = mid; + } + return 0; + } + + + FT_CALLBACK_DEF( FT_UInt ) + cff_cmap_unicode_char_next( CFF_CMapUnicode cmap, + FT_UInt32 *pchar_code ) + { + FT_UInt result = 0; + FT_UInt32 char_code = *pchar_code + 1; + + + Restart: + { + FT_UInt min = 0; + FT_UInt max = cmap->num_pairs; + FT_UInt mid; + CFF_CMapUniPair pair; + + + while ( min < max ) + { + mid = min + ( ( max - min ) >> 1 ); + pair = cmap->pairs + mid; + + if ( pair->unicode == char_code ) + { + result = pair->gindex; + if ( result != 0 ) + goto Exit; + + char_code++; + goto Restart; + } + + if ( pair->unicode < char_code ) + min = mid+1; + else + max = mid; + } + + /* we didn't find it, but we have a pair just above it */ + char_code = 0; + + if ( min < cmap->num_pairs ) + { + pair = cmap->pairs + min; + result = pair->gindex; + if ( result != 0 ) + char_code = pair->unicode; + } + } + + Exit: + *pchar_code = char_code; + return result; + } + + + FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec + cff_cmap_unicode_class_rec = + { + sizeof ( CFF_CMapUnicodeRec ), + + (FT_CMap_InitFunc) cff_cmap_unicode_init, + (FT_CMap_DoneFunc) cff_cmap_unicode_done, + (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index, + (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next + }; + + +/* END */ |