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#include "mupdf/fitz.h"
#include "mupdf/pdf.h"
size_t
pdf_cmap_size(fz_context *ctx, pdf_cmap *cmap)
{
if (cmap == NULL)
return 0;
if (cmap->storable.refs < 0)
return 0;
return pdf_cmap_size(ctx, cmap->usecmap) +
cmap->rcap * sizeof *cmap->ranges +
cmap->xcap * sizeof *cmap->xranges +
cmap->mcap * sizeof *cmap->mranges;
}
/*
* Load CMap stream in PDF file
*/
pdf_cmap *
pdf_load_embedded_cmap(fz_context *ctx, pdf_document *doc, pdf_obj *stmobj)
{
fz_stream *file = NULL;
pdf_cmap *cmap = NULL;
pdf_cmap *usecmap = NULL;
pdf_obj *obj;
fz_var(file);
fz_var(cmap);
fz_var(usecmap);
if ((cmap = pdf_find_item(ctx, pdf_drop_cmap_imp, stmobj)) != NULL)
return cmap;
fz_try(ctx)
{
file = pdf_open_stream(ctx, stmobj);
cmap = pdf_load_cmap(ctx, file);
obj = pdf_dict_get(ctx, stmobj, PDF_NAME_WMode);
if (pdf_is_int(ctx, obj))
pdf_set_cmap_wmode(ctx, cmap, pdf_to_int(ctx, obj));
obj = pdf_dict_get(ctx, stmobj, PDF_NAME_UseCMap);
if (pdf_is_name(ctx, obj))
{
usecmap = pdf_load_system_cmap(ctx, pdf_to_name(ctx, obj));
pdf_set_usecmap(ctx, cmap, usecmap);
}
else if (pdf_is_indirect(ctx, obj))
{
if (pdf_mark_obj(ctx, obj))
fz_throw(ctx, FZ_ERROR_GENERIC, "recursive CMap");
fz_try(ctx)
usecmap = pdf_load_embedded_cmap(ctx, doc, obj);
fz_always(ctx)
pdf_unmark_obj(ctx, obj);
fz_catch(ctx)
fz_rethrow(ctx);
pdf_set_usecmap(ctx, cmap, usecmap);
}
pdf_store_item(ctx, stmobj, cmap, pdf_cmap_size(ctx, cmap));
}
fz_always(ctx)
{
fz_drop_stream(ctx, file);
pdf_drop_cmap(ctx, usecmap);
}
fz_catch(ctx)
{
pdf_drop_cmap(ctx, cmap);
fz_rethrow(ctx);
}
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);
fz_try(ctx)
{
unsigned int high = (1 << (bytes * 8)) - 1;
if (wmode)
fz_strlcpy(cmap->cmap_name, "Identity-V", sizeof cmap->cmap_name);
else
fz_strlcpy(cmap->cmap_name, "Identity-H", sizeof cmap->cmap_name);
pdf_add_codespace(ctx, cmap, 0, high, bytes);
pdf_map_range_to_range(ctx, cmap, 0, high, 0);
pdf_sort_cmap(ctx, cmap);
pdf_set_cmap_wmode(ctx, cmap, wmode);
}
fz_catch(ctx)
{
pdf_drop_cmap(ctx, cmap);
fz_rethrow(ctx);
}
return cmap;
}
/*
* Load predefined CMap from system.
*/
pdf_cmap *
pdf_load_system_cmap(fz_context *ctx, const char *cmap_name)
{
pdf_cmap *usecmap;
pdf_cmap *cmap;
cmap = pdf_load_builtin_cmap(ctx, cmap_name);
if (!cmap)
fz_throw(ctx, FZ_ERROR_GENERIC, "no builtin cmap file: %s", cmap_name);
if (cmap->usecmap_name[0] && !cmap->usecmap)
{
usecmap = pdf_load_system_cmap(ctx, cmap->usecmap_name);
if (!usecmap)
fz_throw(ctx, FZ_ERROR_GENERIC, "no builtin cmap file: %s", cmap->usecmap_name);
pdf_set_usecmap(ctx, cmap, usecmap);
}
return cmap;
}
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