Fri, 14 Mar 2003 08:24:37 +0000
finished implementing page labels.
1 /*
2 * tumble: build a PDF file from image files
3 *
4 * PDF routines
5 * $Id: pdf.c,v 1.12 2003/03/14 00:24:37 eric Exp $
6 * Copyright 2001, 2002, 2003 Eric Smith <eric@brouhaha.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation. Note that permission is
11 * not granted to redistribute this program under the terms of any
12 * other version of the General Public License.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
22 */
25 #include <stdbool.h>
26 #include <stdint.h>
27 #include <stdio.h>
28 #include <stdlib.h>
31 #include "bitblt.h"
32 #include "pdf.h"
33 #include "pdf_util.h"
34 #include "pdf_prim.h"
35 #include "pdf_private.h"
36 #include "pdf_name_tree.h"
39 static void pdf_set_info (pdf_file_handle pdf_file, char *key, char *val)
40 {
41 if (! pdf_file->info)
42 pdf_file->info = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
44 pdf_set_dict_entry (pdf_file->info, key, pdf_new_string (val));
45 }
48 void pdf_init (void)
49 {
50 }
53 struct pdf_pages *pdf_new_pages (pdf_file_handle pdf_file)
54 {
55 struct pdf_pages *pages = pdf_calloc (1, sizeof (struct pdf_pages));
57 pages->kids = pdf_new_obj (PT_ARRAY);
58 /* The PDF 1.0 spec doesn't say that kids can't be an indirect object,
59 but Acrobat 4.0 fails to optimize files if it is. */
61 pages->count = pdf_new_integer (0);
62 pages->pages_dict = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
63 pdf_set_dict_entry (pages->pages_dict, "Type", pdf_new_name ("Pages"));
64 pdf_set_dict_entry (pages->pages_dict, "Kids", pages->kids);
65 pdf_set_dict_entry (pages->pages_dict, "Count", pages->count);
66 return (pages);
67 }
70 pdf_file_handle pdf_create (char *filename, int page_mode)
71 {
72 pdf_file_handle pdf_file;
73 char *page_mode_string;
75 switch (page_mode)
76 {
77 case PDF_PAGE_MODE_USE_NONE: page_mode_string = "UseNone"; break;
78 case PDF_PAGE_MODE_USE_OUTLINES: page_mode_string = "UseOutlines"; break;
79 case PDF_PAGE_MODE_USE_THUMBS: page_mode_string = "UseThumbs"; break;
80 default:
81 pdf_fatal ("invalid page mode\n");
82 }
84 pdf_file = pdf_calloc (1, sizeof (struct pdf_file));
86 pdf_file->f = fopen (filename, "wb");
87 if (! pdf_file->f)
88 {
89 pdf_fatal ("error opening output file\n");
90 }
92 pdf_file->root = pdf_new_pages (pdf_file);
94 pdf_file->catalog = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
95 pdf_set_dict_entry (pdf_file->catalog, "Type", pdf_new_name ("Catalog"));
96 pdf_set_dict_entry (pdf_file->catalog, "Pages", pdf_file->root->pages_dict);
97 /* Outlines dictionary will be created later if needed */
98 pdf_set_dict_entry (pdf_file->catalog,
99 "PageMode",
100 pdf_new_name (page_mode_string));
101 pdf_set_dict_entry (pdf_file->catalog, "PageLayout", pdf_new_name ("SinglePage"));
103 pdf_file->info = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
104 pdf_set_info (pdf_file, "Producer", "tumble by Eric Smith -- http://tumble.brouhaha.com/");
106 pdf_file->trailer_dict = pdf_new_obj (PT_DICTIONARY);
107 /* Size key will be added later */
108 pdf_set_dict_entry (pdf_file->trailer_dict, "Root", pdf_file->catalog);
109 pdf_set_dict_entry (pdf_file->trailer_dict, "Info", pdf_file->info);
111 /* write file header */
112 fprintf (pdf_file->f, "%%PDF-1.3\r\n");
114 /* write comment containing 8-bit chars as a hint that the file is binary */
115 /* PDF 1.4 spec, section 3.4.1 */
116 fprintf (pdf_file->f, "%%\342\343\317\323\r\n");
118 return (pdf_file);
119 }
122 void pdf_close (pdf_file_handle pdf_file)
123 {
124 /* finalize trees, object numbers aren't allocated until this step */
125 pdf_finalize_name_trees (pdf_file);
127 /* add the page label number tree, if it exists, to the catalog */
128 if (pdf_file->page_label_tree)
129 pdf_set_dict_entry (pdf_file->catalog,
130 "PageLabels",
131 pdf_file->page_label_tree->root->dict);
133 /* write body */
134 pdf_write_all_ind_obj (pdf_file);
136 /* write cross reference table and get maximum object number */
137 pdf_set_dict_entry (pdf_file->trailer_dict, "Size", pdf_new_integer (pdf_write_xref (pdf_file)));
139 /* write trailer */
140 fprintf (pdf_file->f, "trailer\r\n");
141 pdf_write_obj (pdf_file, pdf_file->trailer_dict);
142 fprintf (pdf_file->f, "startxref\r\n");
143 fprintf (pdf_file->f, "%ld\r\n", pdf_file->xref_offset);
144 fprintf (pdf_file->f, "%%%%EOF\r\n");
146 fclose (pdf_file->f);
147 /* should free stuff here */
148 }
151 void pdf_set_author (pdf_file_handle pdf_file, char *author)
152 {
153 pdf_set_info (pdf_file, "Author", author);
154 }
156 void pdf_set_creator (pdf_file_handle pdf_file, char *creator)
157 {
158 pdf_set_info (pdf_file, "Creator", creator);
159 }
161 void pdf_set_producer (pdf_file_handle pdf_file, char *producer)
162 {
163 pdf_set_info (pdf_file, "Producer", producer);
164 }
166 void pdf_set_title (pdf_file_handle pdf_file, char *title)
167 {
168 pdf_set_info (pdf_file, "Title", title);
169 }
171 void pdf_set_subject (pdf_file_handle pdf_file, char *subject)
172 {
173 pdf_set_info (pdf_file, "Subject", subject);
174 }
176 void pdf_set_keywords (pdf_file_handle pdf_file, char *keywords)
177 {
178 pdf_set_info (pdf_file, "Keywords", keywords);
179 }
182 pdf_page_handle pdf_new_page (pdf_file_handle pdf_file,
183 double width,
184 double height)
185 {
186 pdf_page_handle page = pdf_calloc (1, sizeof (struct pdf_page));
188 page->pdf_file = pdf_file;
190 page->media_box = pdf_new_obj (PT_ARRAY);
191 pdf_add_array_elem (page->media_box, pdf_new_real (0));
192 pdf_add_array_elem (page->media_box, pdf_new_real (0));
193 pdf_add_array_elem (page->media_box, pdf_new_real (width));
194 pdf_add_array_elem (page->media_box, pdf_new_real (height));
196 page->procset = pdf_new_obj (PT_ARRAY);
197 pdf_add_array_elem_unique (page->procset, pdf_new_name ("PDF"));
199 page->resources = pdf_new_obj (PT_DICTIONARY);
200 pdf_set_dict_entry (page->resources, "ProcSet", page->procset);
202 page->page_dict = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
203 pdf_set_dict_entry (page->page_dict, "Type", pdf_new_name ("Page"));
204 pdf_set_dict_entry (page->page_dict, "MediaBox", page->media_box);
205 pdf_set_dict_entry (page->page_dict, "Resources", page->resources);
207 if (pdf_get_integer (pdf_file->root->count) == 0)
208 {
209 struct pdf_obj *dest_array = pdf_new_obj (PT_ARRAY);
210 pdf_add_array_elem (dest_array, page->page_dict);
211 pdf_add_array_elem (dest_array, pdf_new_name ("Fit"));
212 pdf_set_dict_entry (pdf_file->catalog, "OpenAction", dest_array);
213 }
215 /* $$$ currently only support a single-level pages tree */
216 pdf_set_dict_entry (page->page_dict, "Parent", pdf_file->root->pages_dict);
217 pdf_add_array_elem (pdf_file->root->kids, page->page_dict);
218 pdf_set_integer (pdf_file->root->count,
219 pdf_get_integer (pdf_file->root->count) + 1);
221 page->last_XObject_name = '@'; /* first name will be "ImA" */
223 return (page);
224 }
226 void pdf_close_page (pdf_page_handle pdf_page)
227 {
228 }
231 void pdf_set_page_number (pdf_page_handle pdf_page, char *page_number)
232 {
233 }