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/* $Header$
This is dvipdfm, a DVI to PDF translator.
Copyright (C) 1998, 1999 by Mark A. Wicks
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
The author may be contacted via the e-mail address
mwicks@kettering.edu
*/
#include "system.h"
#include "mem.h"
#include "mfileio.h"
#include "pdfobj.h"
#include "pdfdoc.h"
#include "pdfspecial.h"
#include "epdf.h"
pdf_obj *pdf_include_page(FILE *image_file, struct xform_info *p, char *res_name)
{
pdf_obj *trailer = NULL, *catalog = NULL, *page_tree = NULL;
pdf_obj *kids_ref, *kids;
pdf_obj *media_box = NULL, *crop_box = NULL, *resources = NULL,
*contents = NULL, *contents_ref = NULL;
pdf_obj *tmp1;
#ifdef MEM_DEBUG
MEM_START
#endif
if (!(trailer = pdf_open (image_file))) {
fprintf (stderr, "\nCorrupt PDF file?\n");
}
/* Now just lookup catalog location */
/* Deref catalog */
if (trailer && (catalog = pdf_deref_obj(pdf_lookup_dict (trailer,"Root"))) ==
NULL) {
fprintf (stderr, "\nCatalog isn't where I expect it.\n");
}
if (trailer)
pdf_release_obj (trailer);
/* Lookup page tree in catalog */
if (catalog) {
page_tree = pdf_deref_obj (pdf_lookup_dict (catalog, "Pages"));
/* Should be finished with catalog */
pdf_release_obj (catalog);
}
/* Media box and resources can be inherited so start looking for
them here */
if (page_tree) {
if ((tmp1 = pdf_lookup_dict (page_tree, "CropBox")))
crop_box = pdf_deref_obj (tmp1);
if ((tmp1 = pdf_lookup_dict (page_tree, "MediaBox")))
media_box = pdf_deref_obj (tmp1);
resources = pdf_deref_obj (pdf_lookup_dict (page_tree, "Resources"));
if (resources == NULL) {
resources = pdf_new_dict();
}
while ((kids_ref = pdf_lookup_dict (page_tree, "Kids")) != NULL) {
kids = pdf_deref_obj (kids_ref);
pdf_release_obj (page_tree);
page_tree = pdf_deref_obj (pdf_get_array(kids, 0));
pdf_release_obj (kids);
/* Replace MediaBox if it's here */
tmp1 = pdf_deref_obj(pdf_lookup_dict (page_tree, "MediaBox"));
if (tmp1 && media_box)
pdf_release_obj (media_box);
if (tmp1)
media_box = tmp1;
/* Do same for CropBox */
tmp1 = pdf_deref_obj(pdf_lookup_dict (page_tree, "CropBox"));
if (tmp1 && crop_box)
pdf_release_obj (crop_box);
if (tmp1)
crop_box = tmp1;
/* Add resources if they're here */
tmp1 = pdf_deref_obj (pdf_lookup_dict (page_tree, "Resources"));
if (tmp1) {
pdf_merge_dict (tmp1, resources);
pdf_release_obj (resources);
resources = tmp1;
}
}
/* At this point, page_tree contains the first page. media_box,
crop_box, and resources should also be set. */
/* If there's a crop_box, replace media_box with crop_box.
The rest of this routine assumes crop_box has been released */
if (crop_box) {
pdf_release_obj (media_box);
media_box = crop_box;
crop_box = NULL;
}
/* This gets bit confusing. In the following code,
media_box is the box the image is cropped to.
The bounding box is the box the image is scaled to */
/* If user did not supply bounding box, use media_box
(which may really be cropbox) as bounding box */
/* Set the crop box parameters in the xform_info structure */
p->c_llx = pdf_number_value (pdf_get_array (media_box, 0));
p->c_lly = pdf_number_value (pdf_get_array (media_box, 1));
p->c_urx = pdf_number_value (pdf_get_array (media_box, 2));
p->c_ury = pdf_number_value (pdf_get_array (media_box, 3));
/* Adjust scaling and clipping information as necessary */
pdf_scale_image (p);
/* Set the media box to whatever pdf_scale_image() decided
for the crop box (which may be unchanged) */
pdf_release_obj (media_box);
media_box = pdf_new_array ();
pdf_add_array (media_box, pdf_new_number (p->c_llx));
pdf_add_array (media_box, pdf_new_number (p->c_lly));
pdf_add_array (media_box, pdf_new_number (p->c_urx));
pdf_add_array (media_box, pdf_new_number (p->c_ury));
if ((contents =
pdf_deref_obj(pdf_lookup_dict(page_tree,"Contents")))==NULL) {
fprintf (stderr, "\nNo Contents found\n");
return NULL;
}
pdf_release_obj (page_tree);
}
/* Arrays of contents must be handled very differently (not implemented) */
if (contents && contents -> type != PDF_ARRAY) {
doc_make_form_xobj (contents, media_box,
p->user_bbox? p->u_llx: 0.0,
p->user_bbox? p->u_lly: 0.0,
1.0, 1.0,
resources, res_name);
} else {
fprintf (stderr, "\nIgnoring stream with with multiple segments\n");
contents = NULL;
}
if (contents) {
contents_ref = pdf_ref_obj (contents);
pdf_release_obj (contents);
}
pdf_close ();
#ifdef MEM_DEBUG
MEM_END
#endif
return (contents_ref);
}
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