| 0,0 → 1,83 |
|---|
| #include "fitz.h" |
| #include "mupdf.h" |
| |
| /* Load or synthesize ToUnicode map for fonts */ |
| |
| fz_error |
| pdf_load_to_unicode(pdf_font_desc *font, pdf_xref *xref, |
| char **strings, char *collection, fz_obj *cmapstm) |
| { |
| fz_error error = fz_okay; |
| pdf_cmap *cmap; |
| int cid; |
| int ucsbuf[8]; |
| int ucslen; |
| int i; |
| |
| if (pdf_is_stream(xref, fz_to_num(cmapstm), fz_to_gen(cmapstm))) |
| { |
| error = pdf_load_embedded_cmap(&cmap, xref, cmapstm); |
| if (error) |
| return fz_rethrow(error, "cannot load embedded cmap (%d %d R)", fz_to_num(cmapstm), fz_to_gen(cmapstm)); |
| |
| font->to_unicode = pdf_new_cmap(); |
| |
| for (i = 0; i < (strings ? 256 : 65536); i++) |
| { |
| cid = pdf_lookup_cmap(font->encoding, i); |
| if (cid >= 0) |
| { |
| ucslen = pdf_lookup_cmap_full(cmap, i, ucsbuf); |
| if (ucslen == 1) |
| pdf_map_range_to_range(font->to_unicode, cid, cid, ucsbuf[0]); |
| if (ucslen > 1) |
| pdf_map_one_to_many(font->to_unicode, cid, ucsbuf, ucslen); |
| } |
| } |
| |
| pdf_sort_cmap(font->to_unicode); |
| |
| pdf_drop_cmap(cmap); |
| } |
| |
| else if (collection) |
| { |
| error = fz_okay; |
| |
| if (!strcmp(collection, "Adobe-CNS1")) |
| error = pdf_load_system_cmap(&font->to_unicode, "Adobe-CNS1-UCS2"); |
| else if (!strcmp(collection, "Adobe-GB1")) |
| error = pdf_load_system_cmap(&font->to_unicode, "Adobe-GB1-UCS2"); |
| else if (!strcmp(collection, "Adobe-Japan1")) |
| error = pdf_load_system_cmap(&font->to_unicode, "Adobe-Japan1-UCS2"); |
| else if (!strcmp(collection, "Adobe-Korea1")) |
| error = pdf_load_system_cmap(&font->to_unicode, "Adobe-Korea1-UCS2"); |
| |
| if (error) |
| return fz_rethrow(error, "cannot load ToUnicode system cmap %s-UCS2", collection); |
| } |
| |
| if (strings) |
| { |
| /* TODO one-to-many mappings */ |
| |
| font->cid_to_ucs_len = 256; |
| font->cid_to_ucs = fz_calloc(256, sizeof(unsigned short)); |
| |
| for (i = 0; i < 256; i++) |
| { |
| if (strings[i]) |
| font->cid_to_ucs[i] = pdf_lookup_agl(strings[i]); |
| else |
| font->cid_to_ucs[i] = '?'; |
| } |
| } |
| |
| if (!font->to_unicode && !font->cid_to_ucs) |
| { |
| /* TODO: synthesize a ToUnicode if it's a freetype font with |
| * cmap and/or post tables or if it has glyph names. */ |
| } |
| |
| return fz_okay; |
| } |