119 lines
2.6 KiB
C
119 lines
2.6 KiB
C
#include "fitz.h"
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#include "mupdf.h"
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/*
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* Load CMap stream in PDF file
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*/
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fz_error
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pdf_load_embedded_cmap(pdf_cmap **cmapp, pdf_xref *xref, fz_obj *stmobj)
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{
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fz_error error = fz_okay;
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fz_stream *file = NULL;
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pdf_cmap *cmap = NULL;
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pdf_cmap *usecmap;
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fz_obj *wmode;
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fz_obj *obj;
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if ((*cmapp = pdf_find_item(xref->store, pdf_drop_cmap, stmobj)))
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{
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pdf_keep_cmap(*cmapp);
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return fz_okay;
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}
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error = pdf_open_stream(&file, xref, fz_to_num(stmobj), fz_to_gen(stmobj));
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if (error)
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{
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error = fz_rethrow(error, "cannot open cmap stream (%d %d R)", fz_to_num(stmobj), fz_to_gen(stmobj));
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goto cleanup;
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}
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error = pdf_parse_cmap(&cmap, file);
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if (error)
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{
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error = fz_rethrow(error, "cannot parse cmap stream (%d %d R)", fz_to_num(stmobj), fz_to_gen(stmobj));
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goto cleanup;
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}
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fz_close(file);
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wmode = fz_dict_gets(stmobj, "WMode");
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if (fz_is_int(wmode))
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pdf_set_wmode(cmap, fz_to_int(wmode));
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obj = fz_dict_gets(stmobj, "UseCMap");
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if (fz_is_name(obj))
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{
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error = pdf_load_system_cmap(&usecmap, fz_to_name(obj));
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if (error)
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{
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error = fz_rethrow(error, "cannot load system usecmap '%s'", fz_to_name(obj));
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goto cleanup;
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}
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pdf_set_usecmap(cmap, usecmap);
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pdf_drop_cmap(usecmap);
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}
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else if (fz_is_indirect(obj))
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{
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error = pdf_load_embedded_cmap(&usecmap, xref, obj);
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if (error)
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{
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error = fz_rethrow(error, "cannot load embedded usecmap (%d %d R)", fz_to_num(obj), fz_to_gen(obj));
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goto cleanup;
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}
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pdf_set_usecmap(cmap, usecmap);
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pdf_drop_cmap(usecmap);
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}
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pdf_store_item(xref->store, pdf_keep_cmap, pdf_drop_cmap, stmobj, cmap);
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*cmapp = cmap;
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return fz_okay;
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cleanup:
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if (file)
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fz_close(file);
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if (cmap)
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pdf_drop_cmap(cmap);
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return error; /* already rethrown */
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}
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/*
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* Create an Identity-* CMap (for both 1 and 2-byte encodings)
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*/
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pdf_cmap *
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pdf_new_identity_cmap(int wmode, int bytes)
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{
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pdf_cmap *cmap = pdf_new_cmap();
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sprintf(cmap->cmap_name, "Identity-%c", wmode ? 'V' : 'H');
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pdf_add_codespace(cmap, 0x0000, 0xffff, bytes);
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pdf_map_range_to_range(cmap, 0x0000, 0xffff, 0);
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pdf_sort_cmap(cmap);
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pdf_set_wmode(cmap, wmode);
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return cmap;
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}
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/*
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* Load predefined CMap from system.
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*/
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fz_error
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pdf_load_system_cmap(pdf_cmap **cmapp, char *cmap_name)
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{
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pdf_cmap *usecmap;
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pdf_cmap *cmap;
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cmap = pdf_find_builtin_cmap(cmap_name);
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if (!cmap)
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return fz_throw("no builtin cmap file: %s", cmap_name);
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if (cmap->usecmap_name[0] && !cmap->usecmap)
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{
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usecmap = pdf_find_builtin_cmap(cmap->usecmap_name);
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if (!usecmap)
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return fz_throw("nu builtin cmap file: %s", cmap->usecmap_name);
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pdf_set_usecmap(cmap, usecmap);
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}
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*cmapp = cmap;
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return fz_okay;
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}
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