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/* $Header: /home/cvsroot/dvipdfmx/src/epdf.c,v 1.30 2009/09/19 18:48:27 matthias Exp $
This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
Copyright (C) 2007 by Jin-Hwan Cho and Shunsaku Hirata,
the dvipdfmx project team <dvipdfmx@project.ktug.or.kr>
Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
/*
* Concatinating content streams are only supported for streams that only uses
* single FlateDecode filter, i.e.,
*
* /Filter /FlateDecode or /Filter [/FlateDecode]
*
* TrimBox, BleedBox, ArtBox, Rotate ...
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include "system.h"
#include "mem.h"
#include "mfileio.h"
#include "error.h"
#include "dvipdfmx.h"
#include "pdfobj.h"
#include "pdfdev.h"
#include "pdfdoc.h"
#include "pdfximage.h"
#include "epdf.h"
int
pdf_include_page (pdf_ximage *ximage, FILE *image_file, const char *filename)
{
pdf_file *pf;
xform_info info;
pdf_obj *contents = NULL, *catalog;
pdf_obj *page = NULL, *resources = NULL, *markinfo = NULL;
pf = pdf_open(filename, image_file);
if (!pf)
return -1;
if (pdf_file_get_version(pf) > pdf_get_version())
goto too_recent;
pdf_ximage_init_form_info(&info);
page = pdf_doc_get_page(pf, pdf_ximage_get_page(ximage), NULL,
&info.bbox, &resources);
if(!page)
goto error_silent;
catalog = pdf_file_get_catalog(pf);
markinfo = pdf_deref_obj(pdf_lookup_dict(catalog, "MarkInfo"));
if (markinfo) {
pdf_obj *tmp = pdf_deref_obj(pdf_lookup_dict(markinfo, "Marked"));
pdf_release_obj(markinfo);
if (!PDF_OBJ_BOOLEANTYPE(tmp)) {
if (tmp)
pdf_release_obj(tmp);
goto error;
} else if (pdf_boolean_value(tmp))
WARN("File contains tagged PDF. Ignoring tags.");
pdf_release_obj(tmp);
}
contents = pdf_deref_obj(pdf_lookup_dict(page, "Contents"));
pdf_release_obj(page);
/*
* Handle page content stream.
*/
{
pdf_obj *content_new;
if (!contents) {
/*
* Empty page
*/
content_new = pdf_new_stream(0);
/* TODO: better don't include anything if the page is empty */
} else if (PDF_OBJ_STREAMTYPE(contents)) {
/*
* We must import the stream because its dictionary
* may contain indirect references.
*/
content_new = pdf_import_object(contents);
} else if (PDF_OBJ_ARRAYTYPE(contents)) {
/*
* Concatenate all content streams.
*/
int idx, len = pdf_array_length(contents);
content_new = pdf_new_stream(STREAM_COMPRESS);
for (idx = 0; idx < len; idx++) {
pdf_obj *content_seg = pdf_deref_obj(pdf_get_array(contents, idx));
if (!PDF_OBJ_STREAMTYPE(content_seg) ||
pdf_concat_stream(content_new, content_seg) < 0) {
pdf_release_obj(content_seg);
pdf_release_obj(content_new);
goto error;
}
pdf_release_obj(content_seg);
}
} else
goto error;
if (contents)
pdf_release_obj(contents);
contents = content_new;
}
/*
* Add entries to contents stream dictionary.
*/
{
pdf_obj *contents_dict, *bbox, *matrix;
contents_dict = pdf_stream_dict(contents);
pdf_add_dict(contents_dict,
pdf_new_name("Type"),
pdf_new_name("XObject"));
pdf_add_dict(contents_dict,
pdf_new_name("Subtype"),
pdf_new_name("Form"));
pdf_add_dict(contents_dict,
pdf_new_name("FormType"),
pdf_new_number(1.0));
bbox = pdf_new_array();
pdf_add_array(bbox, pdf_new_number(info.bbox.llx));
pdf_add_array(bbox, pdf_new_number(info.bbox.lly));
pdf_add_array(bbox, pdf_new_number(info.bbox.urx));
pdf_add_array(bbox, pdf_new_number(info.bbox.ury));
pdf_add_dict(contents_dict, pdf_new_name("BBox"), bbox);
matrix = pdf_new_array();
pdf_add_array(matrix, pdf_new_number(1.0));
pdf_add_array(matrix, pdf_new_number(0.0));
pdf_add_array(matrix, pdf_new_number(0.0));
pdf_add_array(matrix, pdf_new_number(1.0));
pdf_add_array(matrix, pdf_new_number(0.0));
pdf_add_array(matrix, pdf_new_number(0.0));
pdf_add_dict(contents_dict, pdf_new_name("Matrix"), matrix);
pdf_add_dict(contents_dict,
pdf_new_name("Resources"),
pdf_import_object(resources));
pdf_release_obj(resources);
}
pdf_close(pf);
pdf_ximage_set_form(ximage, &info, contents);
return 0;
error:
WARN("Cannot parse document. Broken PDF file?");
error_silent:
if (resources)
pdf_release_obj(resources);
if (markinfo)
pdf_release_obj(markinfo);
if (page)
pdf_release_obj(page);
if (contents)
pdf_release_obj(contents);
pdf_close(pf);
return -1;
too_recent:
pdf_close(pf);
WARN("PDF version of input file more recent than in output file.");
if (compat_mode) {
WARN("Converting. Use \"-V\" switch to change output PDF version.");
return 1;
} else {
WARN("Use \"-V\" switch to change output PDF version.");
return -1;
}
}
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