Thu, 13 Mar 2003 08:57:05 +0000
changed program name from t2p to tumble.
1 /*
2 * tumble: build a PDF file from image files
3 *
4 * PDF routines
5 * $Id: pdf.c,v 1.10 2003/03/13 00:57:05 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));
102 pdf_file->info = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
103 pdf_set_info (pdf_file, "Producer", "tumble by Eric Smith <eric@brouhaha.com>");
105 pdf_file->trailer_dict = pdf_new_obj (PT_DICTIONARY);
106 /* Size key will be added later */
107 pdf_set_dict_entry (pdf_file->trailer_dict, "Root", pdf_file->catalog);
108 pdf_set_dict_entry (pdf_file->trailer_dict, "Info", pdf_file->info);
110 /* write file header */
111 fprintf (pdf_file->f, "%%PDF-1.2\r\n");
113 return (pdf_file);
114 }
117 void pdf_close (pdf_file_handle pdf_file)
118 {
119 /* finalize all data structures */
120 pdf_finalize_name_trees (pdf_file);
122 /* write body */
123 pdf_write_all_ind_obj (pdf_file);
125 /* write cross reference table and get maximum object number */
126 pdf_set_dict_entry (pdf_file->trailer_dict, "Size", pdf_new_integer (pdf_write_xref (pdf_file)));
128 /* write trailer */
129 fprintf (pdf_file->f, "trailer\r\n");
130 pdf_write_obj (pdf_file, pdf_file->trailer_dict);
131 fprintf (pdf_file->f, "startxref\r\n");
132 fprintf (pdf_file->f, "%ld\r\n", pdf_file->xref_offset);
133 fprintf (pdf_file->f, "%%%%EOF\r\n");
135 fclose (pdf_file->f);
136 /* should free stuff here */
137 }
140 void pdf_set_author (pdf_file_handle pdf_file, char *author)
141 {
142 pdf_set_info (pdf_file, "Author", author);
143 }
145 void pdf_set_creator (pdf_file_handle pdf_file, char *creator)
146 {
147 pdf_set_info (pdf_file, "Creator", creator);
148 }
150 void pdf_set_producer (pdf_file_handle pdf_file, char *producer)
151 {
152 pdf_set_info (pdf_file, "Producer", producer);
153 }
155 void pdf_set_title (pdf_file_handle pdf_file, char *title)
156 {
157 pdf_set_info (pdf_file, "Title", title);
158 }
160 void pdf_set_subject (pdf_file_handle pdf_file, char *subject)
161 {
162 pdf_set_info (pdf_file, "Subject", subject);
163 }
165 void pdf_set_keywords (pdf_file_handle pdf_file, char *keywords)
166 {
167 pdf_set_info (pdf_file, "Keywords", keywords);
168 }
171 pdf_page_handle pdf_new_page (pdf_file_handle pdf_file,
172 double width,
173 double height)
174 {
175 pdf_page_handle page = pdf_calloc (1, sizeof (struct pdf_page));
177 page->pdf_file = pdf_file;
179 page->media_box = pdf_new_obj (PT_ARRAY);
180 pdf_add_array_elem (page->media_box, pdf_new_real (0));
181 pdf_add_array_elem (page->media_box, pdf_new_real (0));
182 pdf_add_array_elem (page->media_box, pdf_new_real (width));
183 pdf_add_array_elem (page->media_box, pdf_new_real (height));
185 page->procset = pdf_new_obj (PT_ARRAY);
186 pdf_add_array_elem_unique (page->procset, pdf_new_name ("PDF"));
188 page->resources = pdf_new_obj (PT_DICTIONARY);
189 pdf_set_dict_entry (page->resources, "ProcSet", page->procset);
191 page->page_dict = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
192 pdf_set_dict_entry (page->page_dict, "Type", pdf_new_name ("Page"));
193 pdf_set_dict_entry (page->page_dict, "MediaBox", page->media_box);
194 pdf_set_dict_entry (page->page_dict, "Resources", page->resources);
196 /* $$$ currently only support a single-level pages tree */
197 pdf_set_dict_entry (page->page_dict, "Parent", pdf_file->root->pages_dict);
198 pdf_add_array_elem (pdf_file->root->kids, page->page_dict);
199 pdf_set_integer (pdf_file->root->count,
200 pdf_get_integer (pdf_file->root->count) + 1);
202 page->last_XObject_name = '@'; /* first name will be "ImA" */
204 return (page);
205 }
207 void pdf_close_page (pdf_page_handle pdf_page)
208 {
209 }
212 void pdf_set_page_number (pdf_page_handle pdf_page, char *page_number)
213 {
214 }
216 void pdf_bookmark (pdf_page_handle pdf_page, int level, char *name)
217 {
218 }