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