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