/* $Header$ 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); }