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#include "fitz.h"
#include "mupdf.h"
/*
* Load CMap stream in PDF file
*/
pdf_cmap *
pdf_load_embedded_cmap(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;
fz_context *ctx = xref->ctx;
volatile int phase = 0;
if ((cmap = pdf_find_item(ctx, xref->store, (pdf_store_drop_fn *)pdf_drop_cmap, stmobj)))
{
pdf_keep_cmap(cmap);
return cmap;
}
fz_try(ctx)
{
file = pdf_open_stream(xref, fz_to_num(stmobj), fz_to_gen(stmobj));
phase = 1;
cmap = pdf_parse_cmap(file);
phase = 2;
fz_close(file);
file = NULL;
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))
{
usecmap = pdf_load_system_cmap(ctx, fz_to_name(obj));
pdf_set_usecmap(ctx, cmap, usecmap);
pdf_drop_cmap(ctx, usecmap);
}
else if (fz_is_indirect(obj))
{
phase = 3;
usecmap = pdf_load_embedded_cmap(xref, obj);
pdf_set_usecmap(ctx, cmap, usecmap);
pdf_drop_cmap(ctx, usecmap);
}
pdf_store_item(ctx, xref->store, (pdf_store_keep_fn *)pdf_keep_cmap, (pdf_store_drop_fn *)pdf_drop_cmap, stmobj, cmap);
}
fz_catch(ctx)
{
if (file)
fz_close(file);
if (cmap)
pdf_drop_cmap(ctx, cmap);
if (phase < 1)
fz_throw(ctx, "cannot open cmap stream (%d %d R)", fz_to_num(stmobj), fz_to_gen(stmobj));
else if (phase < 2)
fz_throw(ctx, "cannot parse cmap stream (%d %d R)", fz_to_num(stmobj), fz_to_gen(stmobj));
else if (phase < 3)
fz_throw(ctx, "cannot load system usecmap '%s'", fz_to_name(obj));
else
fz_throw(ctx, "cannot load embedded usecmap (%d %d R)", fz_to_num(obj), fz_to_gen(obj));
}
return cmap;
}
/*
* Create an Identity-* CMap (for both 1 and 2-byte encodings)
*/
pdf_cmap *
pdf_new_identity_cmap(fz_context *ctx, int wmode, int bytes)
{
pdf_cmap *cmap = pdf_new_cmap(ctx);
sprintf(cmap->cmap_name, "Identity-%c", wmode ? 'V' : 'H');
pdf_add_codespace(ctx, cmap, 0x0000, 0xffff, bytes);
pdf_map_range_to_range(ctx, cmap, 0x0000, 0xffff, 0);
pdf_sort_cmap(ctx, cmap);
pdf_set_wmode(cmap, wmode);
return cmap;
}
/*
* Load predefined CMap from system.
*/
pdf_cmap *
pdf_load_system_cmap(fz_context *ctx, char *cmap_name)
{
pdf_cmap *usecmap;
pdf_cmap *cmap;
cmap = pdf_find_builtin_cmap(cmap_name);
if (!cmap)
fz_throw(ctx, "no builtin cmap file: %s", cmap_name);
if (cmap->usecmap_name[0] && !cmap->usecmap)
{
usecmap = pdf_find_builtin_cmap(cmap->usecmap_name);
if (!usecmap)
fz_throw(ctx, "nu builtin cmap file: %s", cmap->usecmap_name);
pdf_set_usecmap(ctx, cmap, usecmap);
}
return cmap;
}
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