pdf.c

Thu, 13 Mar 2003 07:59:10 +0000

author
eric
date
Thu, 13 Mar 2003 07:59:10 +0000
changeset 121
e50c7f76f2f6
parent 118
c22e1c0a64fd
child 124
ba64dfca82e9
permissions
-rw-r--r--

don't use page mode USE_OUTLINES if there are no outline entries.

eric@62 1 /*
eric@62 2 * t2p: Create a PDF file from the contents of one or more TIFF
eric@62 3 * bilevel image files. The images in the resulting PDF file
eric@62 4 * will be compressed using ITU-T T.6 (G4) fax encoding.
eric@62 5 *
eric@62 6 * PDF routines
eric@118 7 * $Id: pdf.c,v 1.8 2003/03/12 22:56:57 eric Exp $
eric@62 8 * Copyright 2001, 2002, 2003 Eric Smith <eric@brouhaha.com>
eric@62 9 *
eric@62 10 * This program is free software; you can redistribute it and/or modify
eric@62 11 * it under the terms of the GNU General Public License version 2 as
eric@62 12 * published by the Free Software Foundation. Note that permission is
eric@62 13 * not granted to redistribute this program under the terms of any
eric@62 14 * other version of the General Public License.
eric@62 15 *
eric@62 16 * This program is distributed in the hope that it will be useful,
eric@62 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
eric@62 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
eric@62 19 * GNU General Public License for more details.
eric@62 20 *
eric@62 21 * You should have received a copy of the GNU General Public License
eric@62 22 * along with this program; if not, write to the Free Software
eric@62 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
eric@62 24 */
eric@62 25
eric@62 26
eric@62 27 #include <stdbool.h>
eric@62 28 #include <stdint.h>
eric@59 29 #include <stdio.h>
eric@59 30 #include <stdlib.h>
eric@59 31
eric@59 32
eric@62 33 #include "bitblt.h"
eric@60 34 #include "pdf.h"
eric@60 35 #include "pdf_util.h"
eric@60 36 #include "pdf_prim.h"
eric@60 37 #include "pdf_private.h"
eric@85 38 #include "pdf_name_tree.h"
eric@59 39
eric@59 40
eric@59 41 static void pdf_set_info (pdf_file_handle pdf_file, char *key, char *val)
eric@59 42 {
eric@59 43 if (! pdf_file->info)
eric@59 44 pdf_file->info = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
eric@59 45
eric@59 46 pdf_set_dict_entry (pdf_file->info, key, pdf_new_string (val));
eric@59 47 }
eric@59 48
eric@59 49
eric@59 50 void pdf_init (void)
eric@59 51 {
eric@59 52 }
eric@59 53
eric@59 54
eric@59 55 struct pdf_pages *pdf_new_pages (pdf_file_handle pdf_file)
eric@59 56 {
eric@67 57 struct pdf_pages *pages = pdf_calloc (1, sizeof (struct pdf_pages));
eric@59 58 pages->kids = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_ARRAY));
eric@59 59 pages->count = pdf_new_integer (0);
eric@59 60 pages->pages_dict = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
eric@59 61 pdf_set_dict_entry (pages->pages_dict, "Type", pdf_new_name ("Pages"));
eric@59 62 pdf_set_dict_entry (pages->pages_dict, "Kids", pages->kids);
eric@59 63 pdf_set_dict_entry (pages->pages_dict, "Count", pages->count);
eric@59 64 return (pages);
eric@59 65 }
eric@59 66
eric@59 67
eric@75 68 pdf_file_handle pdf_create (char *filename, int page_mode)
eric@59 69 {
eric@59 70 pdf_file_handle pdf_file;
eric@75 71 char *page_mode_string;
eric@75 72
eric@75 73 switch (page_mode)
eric@75 74 {
eric@75 75 case PDF_PAGE_MODE_USE_NONE: page_mode_string = "UseNone"; break;
eric@75 76 case PDF_PAGE_MODE_USE_OUTLINES: page_mode_string = "UseOutlines"; break;
eric@75 77 case PDF_PAGE_MODE_USE_THUMBS: page_mode_string = "UseThumbs"; break;
eric@75 78 default:
eric@75 79 pdf_fatal ("invalid page mode\n");
eric@75 80 }
eric@59 81
eric@67 82 pdf_file = pdf_calloc (1, sizeof (struct pdf_file));
eric@59 83
eric@59 84 pdf_file->f = fopen (filename, "wb");
eric@59 85 if (! pdf_file->f)
eric@59 86 {
eric@59 87 pdf_fatal ("error opening output file\n");
eric@59 88 }
eric@59 89
eric@59 90 pdf_file->root = pdf_new_pages (pdf_file);
eric@59 91
eric@59 92 pdf_file->catalog = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
eric@59 93 pdf_set_dict_entry (pdf_file->catalog, "Type", pdf_new_name ("Catalog"));
eric@59 94 pdf_set_dict_entry (pdf_file->catalog, "Pages", pdf_file->root->pages_dict);
eric@75 95 /* Outlines dictionary will be created later if needed */
eric@75 96 pdf_set_dict_entry (pdf_file->catalog,
eric@75 97 "PageMode",
eric@75 98 pdf_new_name (page_mode_string));
eric@59 99
eric@59 100 pdf_file->info = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
eric@114 101 pdf_set_info (pdf_file, "Producer", "t2p by Eric Smith <eric@brouhaha.com>");
eric@59 102
eric@59 103 pdf_file->trailer_dict = pdf_new_obj (PT_DICTIONARY);
eric@59 104 /* Size key will be added later */
eric@59 105 pdf_set_dict_entry (pdf_file->trailer_dict, "Root", pdf_file->catalog);
eric@59 106 pdf_set_dict_entry (pdf_file->trailer_dict, "Info", pdf_file->info);
eric@59 107
eric@59 108 /* write file header */
eric@59 109 fprintf (pdf_file->f, "%%PDF-1.2\r\n");
eric@59 110
eric@59 111 return (pdf_file);
eric@59 112 }
eric@59 113
eric@59 114
eric@59 115 void pdf_close (pdf_file_handle pdf_file)
eric@59 116 {
eric@85 117 /* finalize all data structures */
eric@85 118 pdf_finalize_name_trees (pdf_file);
eric@85 119
eric@59 120 /* write body */
eric@59 121 pdf_write_all_ind_obj (pdf_file);
eric@59 122
eric@59 123 /* write cross reference table and get maximum object number */
eric@59 124 pdf_set_dict_entry (pdf_file->trailer_dict, "Size", pdf_new_integer (pdf_write_xref (pdf_file)));
eric@59 125
eric@59 126 /* write trailer */
eric@59 127 fprintf (pdf_file->f, "trailer\r\n");
eric@59 128 pdf_write_obj (pdf_file, pdf_file->trailer_dict);
eric@59 129 fprintf (pdf_file->f, "startxref\r\n");
eric@59 130 fprintf (pdf_file->f, "%ld\r\n", pdf_file->xref_offset);
eric@59 131 fprintf (pdf_file->f, "%%%%EOF\r\n");
eric@59 132
eric@59 133 fclose (pdf_file->f);
eric@59 134 /* should free stuff here */
eric@59 135 }
eric@59 136
eric@59 137
eric@59 138 void pdf_set_author (pdf_file_handle pdf_file, char *author)
eric@59 139 {
eric@59 140 pdf_set_info (pdf_file, "Author", author);
eric@59 141 }
eric@59 142
eric@59 143 void pdf_set_creator (pdf_file_handle pdf_file, char *creator)
eric@59 144 {
eric@59 145 pdf_set_info (pdf_file, "Creator", creator);
eric@59 146 }
eric@59 147
eric@59 148 void pdf_set_producer (pdf_file_handle pdf_file, char *producer)
eric@59 149 {
eric@59 150 pdf_set_info (pdf_file, "Producer", producer);
eric@59 151 }
eric@59 152
eric@59 153 void pdf_set_title (pdf_file_handle pdf_file, char *title)
eric@59 154 {
eric@59 155 pdf_set_info (pdf_file, "Title", title);
eric@59 156 }
eric@59 157
eric@59 158 void pdf_set_subject (pdf_file_handle pdf_file, char *subject)
eric@59 159 {
eric@59 160 pdf_set_info (pdf_file, "Subject", subject);
eric@59 161 }
eric@59 162
eric@59 163 void pdf_set_keywords (pdf_file_handle pdf_file, char *keywords)
eric@59 164 {
eric@59 165 pdf_set_info (pdf_file, "Keywords", keywords);
eric@59 166 }
eric@59 167
eric@59 168
eric@59 169 pdf_page_handle pdf_new_page (pdf_file_handle pdf_file,
eric@59 170 double width,
eric@59 171 double height)
eric@59 172 {
eric@67 173 pdf_page_handle page = pdf_calloc (1, sizeof (struct pdf_page));
eric@59 174
eric@59 175 page->pdf_file = pdf_file;
eric@59 176
eric@59 177 page->media_box = pdf_new_obj (PT_ARRAY);
eric@59 178 pdf_add_array_elem (page->media_box, pdf_new_real (0));
eric@59 179 pdf_add_array_elem (page->media_box, pdf_new_real (0));
eric@59 180 pdf_add_array_elem (page->media_box, pdf_new_real (width));
eric@59 181 pdf_add_array_elem (page->media_box, pdf_new_real (height));
eric@59 182
eric@59 183 page->procset = pdf_new_obj (PT_ARRAY);
eric@118 184 pdf_add_array_elem_unique (page->procset, pdf_new_name ("PDF"));
eric@59 185
eric@59 186 page->resources = pdf_new_obj (PT_DICTIONARY);
eric@59 187 pdf_set_dict_entry (page->resources, "ProcSet", page->procset);
eric@59 188
eric@59 189 page->page_dict = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
eric@59 190 pdf_set_dict_entry (page->page_dict, "Type", pdf_new_name ("Page"));
eric@59 191 pdf_set_dict_entry (page->page_dict, "MediaBox", page->media_box);
eric@59 192 pdf_set_dict_entry (page->page_dict, "Resources", page->resources);
eric@59 193
eric@59 194 /* $$$ currently only support a single-level pages tree */
eric@59 195 pdf_set_dict_entry (page->page_dict, "Parent", pdf_file->root->pages_dict);
eric@59 196 pdf_add_array_elem (pdf_file->root->kids, page->page_dict);
eric@59 197 pdf_set_integer (pdf_file->root->count,
eric@59 198 pdf_get_integer (pdf_file->root->count) + 1);
eric@59 199
eric@59 200 page->last_XObject_name = '@'; /* first name will be "ImA" */
eric@59 201
eric@59 202 return (page);
eric@59 203 }
eric@59 204
eric@59 205 void pdf_close_page (pdf_page_handle pdf_page)
eric@59 206 {
eric@59 207 }
eric@59 208
eric@59 209
eric@59 210 void pdf_set_page_number (pdf_page_handle pdf_page, char *page_number)
eric@59 211 {
eric@59 212 }
eric@59 213
eric@59 214 void pdf_bookmark (pdf_page_handle pdf_page, int level, char *name)
eric@59 215 {
eric@59 216 }