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Diffstat (limited to 'src/FreeType/ftenc.c')
| -rw-r--r-- | src/FreeType/ftenc.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/src/FreeType/ftenc.c b/src/FreeType/ftenc.c new file mode 100644 index 0000000..7243f3f --- /dev/null +++ b/src/FreeType/ftenc.c @@ -0,0 +1,212 @@ +/* +Copyright (c) 1998-2002 by Juliusz Chroboczek + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. +*/ +/* $XFree86: xc/lib/font/FreeType/ftenc.c,v 1.21 2002/10/01 00:02:10 alanh Exp $ */ + +#ifndef FONTMODULE +#include <string.h> +#else +#include "Xmd.h" +#include "Xdefs.h" +#include "xf86_ansic.h" +#endif + +#include "fontmisc.h" +#include "fontenc.h" +#include "freetype/freetype.h" +#include "freetype/ttnameid.h" +#include "freetype/tttables.h" +#include "freetype/t1tables.h" +#include "freetype/ftxf86.h" +#include "ft.h" + +static int find_cmap(int, int, int, FT_Face, FT_CharMap *); + +static int +FTEncFontSpecific(char *encoding) +{ + char *p = encoding; + + while(*p != '-') { + if(*p == '\0') + return 0; + p++; + } + p++; + return (strcasecmp(p, "fontspecific") == 0); +} + +int +FTPickMapping(char *xlfd, int length, char *filename, FT_Face face, + FTMappingPtr tm) +{ + FontEncPtr encoding; + FontMapPtr mapping; + FT_CharMap cmap; + int ftrc; + + char *encoding_name = 0; + + if(xlfd) + encoding_name = FontEncFromXLFD(xlfd, length); + if(!encoding_name) + encoding_name = "iso8859-1"; + + if(FTEncFontSpecific(encoding_name)) { + ftrc = FT_Select_Charmap(face, ft_encoding_adobe_custom); + if(ftrc != 0) { + ErrorF("FreeType: couldn't select custom Type 1 encoding\n"); + return -1; + } else { + tm->named = 0; + tm->cmap = face->charmap; + tm->base = 0; + tm->mapping = NULL; + return 0; + } + } + + encoding = FontEncFind(encoding_name, filename); + if(encoding == NULL) { + ErrorF("FreeType: couldn't find encoding %s\n", encoding_name); + encoding = FontEncFind("iso8859-1", filename); + } + if(encoding == NULL) { + ErrorF("FreeType: couldn't find encoding iso8859-1.\n"); + return -1; + } + + if(FT_Has_PS_Glyph_Names(face)) { + for(mapping = encoding->mappings; mapping; mapping = mapping->next) { + if(mapping->type == FONT_ENCODING_POSTSCRIPT) { + tm->named = 1; + tm->base = 0; + tm->mapping = mapping; + return 0; + } + } + } + + for(mapping = encoding->mappings; mapping; mapping = mapping->next) { + if(find_cmap(mapping->type, mapping->pid, mapping->eid, face, + &cmap)) { + tm->named = 0; + tm->cmap = cmap; + if(strcasecmp(encoding_name, "microsoft-symbol") == 0) { + /* deal with undocumented lossage */ + TT_OS2 *os2; + os2 = FT_Get_Sfnt_Table(face, ft_sfnt_os2); + if(os2) + tm->base = os2->usFirstCharIndex - 0x20; + else + tm->base = 0; + } else + tm->base = 0; + tm->mapping = mapping; + return 0; + } + } + + return -1; +} + +static int +find_cmap(int type, int pid, int eid, FT_Face face, FT_CharMap *cmap_return) +{ + int i, n; + FT_CharMap cmap = NULL; + + n = face->num_charmaps; + + switch(type) { + case FONT_ENCODING_TRUETYPE: /* specific cmap */ + for(i=0; i<n; i++) { + cmap = face->charmaps[i]; + if(cmap->platform_id == pid && cmap->encoding_id == eid) { + *cmap_return = cmap; + return 1; + } + } + break; + case FONT_ENCODING_UNICODE: /* any Unicode cmap */ + /* prefer Microsoft Unicode */ + for(i=0; i<n; i++) { + cmap = face->charmaps[i]; + if(cmap->platform_id == TT_PLATFORM_MICROSOFT && + cmap->encoding_id == TT_MS_ID_UNICODE_CS) { + *cmap_return = cmap; + return 1; + } + } + break; + /* Try Apple Unicode */ + for(i=0; i<n; i++) { + cmap = face->charmaps[i]; + if(cmap->platform_id == TT_PLATFORM_APPLE_UNICODE) { + *cmap_return = cmap; + return 1; + } + } + /* ISO Unicode? */ + for(i=0; i<n; i++) { + cmap = face->charmaps[i]; + if(cmap->platform_id == TT_PLATFORM_ISO) { + *cmap_return = cmap; + return 1; + } + } + break; + default: + return 0; + } + return 0; +} + +unsigned +FTRemap(FT_Face face, FTMappingPtr tm, unsigned code) +{ + unsigned index; + char *name; + unsigned glyph_index; + + if(tm->mapping) { + if(tm->named) { + name = FontEncName(code, tm->mapping); + if(!name) + return 0; + glyph_index = FT_Get_Name_Index(face, name); + return glyph_index; + } else { + index = FontEncRecode(code, tm->mapping) + tm->base; + FT_Set_Charmap(face, tm->cmap); + glyph_index = FT_Get_Char_Index(face, index); + return glyph_index; + } + } else { + if(code < 0x100) { + index = code; + FT_Set_Charmap(face, tm->cmap); + glyph_index = FT_Get_Char_Index(face, index); + return glyph_index; + } else + return 0; + } +} |