pdf.c

Thu, 20 Feb 2003 12:44:17 +0000

author
eric
date
Thu, 20 Feb 2003 12:44:17 +0000
changeset 62
9bd354b83e16
parent 60
ffb5b1e54eb2
child 67
7add7411c1c2
permissions
-rw-r--r--

my own PDF routines to replace Panda.

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@62 7 * $Id: pdf.c,v 1.3 2003/02/20 04:44:17 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@59 38
eric@59 39
eric@59 40 static void pdf_set_info (pdf_file_handle pdf_file, char *key, char *val)
eric@59 41 {
eric@59 42 if (! pdf_file->info)
eric@59 43 pdf_file->info = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
eric@59 44
eric@59 45 pdf_set_dict_entry (pdf_file->info, key, pdf_new_string (val));
eric@59 46 }
eric@59 47
eric@59 48
eric@59 49 void pdf_init (void)
eric@59 50 {
eric@59 51 }
eric@59 52
eric@59 53
eric@59 54 struct pdf_pages *pdf_new_pages (pdf_file_handle pdf_file)
eric@59 55 {
eric@59 56 struct pdf_pages *pages = pdf_calloc (sizeof (struct pdf_pages));
eric@59 57 pages->kids = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_ARRAY));
eric@59 58 pages->count = pdf_new_integer (0);
eric@59 59 pages->pages_dict = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
eric@59 60 pdf_set_dict_entry (pages->pages_dict, "Type", pdf_new_name ("Pages"));
eric@59 61 pdf_set_dict_entry (pages->pages_dict, "Kids", pages->kids);
eric@59 62 pdf_set_dict_entry (pages->pages_dict, "Count", pages->count);
eric@59 63 return (pages);
eric@59 64 }
eric@59 65
eric@59 66
eric@59 67 pdf_file_handle pdf_create (char *filename)
eric@59 68 {
eric@59 69 pdf_file_handle pdf_file;
eric@59 70
eric@59 71 pdf_file = pdf_calloc (sizeof (struct pdf_file));
eric@59 72
eric@59 73 pdf_file->f = fopen (filename, "wb");
eric@59 74 if (! pdf_file->f)
eric@59 75 {
eric@59 76 pdf_fatal ("error opening output file\n");
eric@59 77 }
eric@59 78
eric@59 79 pdf_file->root = pdf_new_pages (pdf_file);
eric@59 80
eric@59 81 pdf_file->catalog = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
eric@59 82 pdf_set_dict_entry (pdf_file->catalog, "Type", pdf_new_name ("Catalog"));
eric@59 83 pdf_set_dict_entry (pdf_file->catalog, "Pages", pdf_file->root->pages_dict);
eric@59 84 /* Outlines dictionary will be created later if needed*/
eric@59 85 pdf_set_dict_entry (pdf_file->catalog, "PageMode", pdf_new_name ("UseNone"));
eric@59 86
eric@59 87 pdf_file->info = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
eric@60 88 pdf_set_info (pdf_file, "Producer", "t2p, Copyright 2003 Eric Smith <eric@brouhaha.com>");
eric@59 89
eric@59 90 pdf_file->trailer_dict = pdf_new_obj (PT_DICTIONARY);
eric@59 91 /* Size key will be added later */
eric@59 92 pdf_set_dict_entry (pdf_file->trailer_dict, "Root", pdf_file->catalog);
eric@59 93 pdf_set_dict_entry (pdf_file->trailer_dict, "Info", pdf_file->info);
eric@59 94
eric@59 95 /* write file header */
eric@59 96 fprintf (pdf_file->f, "%%PDF-1.2\r\n");
eric@59 97
eric@59 98 return (pdf_file);
eric@59 99 }
eric@59 100
eric@59 101
eric@59 102 void pdf_close (pdf_file_handle pdf_file)
eric@59 103 {
eric@59 104 /* write body */
eric@59 105 pdf_write_all_ind_obj (pdf_file);
eric@59 106
eric@59 107 /* write cross reference table and get maximum object number */
eric@59 108 pdf_set_dict_entry (pdf_file->trailer_dict, "Size", pdf_new_integer (pdf_write_xref (pdf_file)));
eric@59 109
eric@59 110 /* write trailer */
eric@59 111 fprintf (pdf_file->f, "trailer\r\n");
eric@59 112 pdf_write_obj (pdf_file, pdf_file->trailer_dict);
eric@59 113 fprintf (pdf_file->f, "startxref\r\n");
eric@59 114 fprintf (pdf_file->f, "%ld\r\n", pdf_file->xref_offset);
eric@59 115 fprintf (pdf_file->f, "%%%%EOF\r\n");
eric@59 116
eric@59 117 fclose (pdf_file->f);
eric@59 118 /* should free stuff here */
eric@59 119 }
eric@59 120
eric@59 121
eric@59 122 void pdf_set_author (pdf_file_handle pdf_file, char *author)
eric@59 123 {
eric@59 124 pdf_set_info (pdf_file, "Author", author);
eric@59 125 }
eric@59 126
eric@59 127 void pdf_set_creator (pdf_file_handle pdf_file, char *creator)
eric@59 128 {
eric@59 129 pdf_set_info (pdf_file, "Creator", creator);
eric@59 130 }
eric@59 131
eric@59 132 void pdf_set_producer (pdf_file_handle pdf_file, char *producer)
eric@59 133 {
eric@59 134 pdf_set_info (pdf_file, "Producer", producer);
eric@59 135 }
eric@59 136
eric@59 137 void pdf_set_title (pdf_file_handle pdf_file, char *title)
eric@59 138 {
eric@59 139 pdf_set_info (pdf_file, "Title", title);
eric@59 140 }
eric@59 141
eric@59 142 void pdf_set_subject (pdf_file_handle pdf_file, char *subject)
eric@59 143 {
eric@59 144 pdf_set_info (pdf_file, "Subject", subject);
eric@59 145 }
eric@59 146
eric@59 147 void pdf_set_keywords (pdf_file_handle pdf_file, char *keywords)
eric@59 148 {
eric@59 149 pdf_set_info (pdf_file, "Keywords", keywords);
eric@59 150 }
eric@59 151
eric@59 152
eric@59 153 pdf_page_handle pdf_new_page (pdf_file_handle pdf_file,
eric@59 154 double width,
eric@59 155 double height)
eric@59 156 {
eric@59 157 pdf_page_handle page = pdf_calloc (sizeof (struct pdf_page));
eric@59 158
eric@59 159 page->pdf_file = pdf_file;
eric@59 160
eric@59 161 page->media_box = pdf_new_obj (PT_ARRAY);
eric@59 162 pdf_add_array_elem (page->media_box, pdf_new_real (0));
eric@59 163 pdf_add_array_elem (page->media_box, pdf_new_real (0));
eric@59 164 pdf_add_array_elem (page->media_box, pdf_new_real (width));
eric@59 165 pdf_add_array_elem (page->media_box, pdf_new_real (height));
eric@59 166
eric@59 167 page->procset = pdf_new_obj (PT_ARRAY);
eric@59 168 pdf_add_array_elem (page->procset, pdf_new_name ("PDF"));
eric@59 169
eric@59 170 page->resources = pdf_new_obj (PT_DICTIONARY);
eric@59 171 pdf_set_dict_entry (page->resources, "ProcSet", page->procset);
eric@59 172
eric@59 173 page->page_dict = pdf_new_ind_ref (pdf_file, pdf_new_obj (PT_DICTIONARY));
eric@59 174 pdf_set_dict_entry (page->page_dict, "Type", pdf_new_name ("Page"));
eric@59 175 pdf_set_dict_entry (page->page_dict, "MediaBox", page->media_box);
eric@59 176 pdf_set_dict_entry (page->page_dict, "Resources", page->resources);
eric@59 177
eric@59 178 /* $$$ currently only support a single-level pages tree */
eric@59 179 pdf_set_dict_entry (page->page_dict, "Parent", pdf_file->root->pages_dict);
eric@59 180 pdf_add_array_elem (pdf_file->root->kids, page->page_dict);
eric@59 181 pdf_set_integer (pdf_file->root->count,
eric@59 182 pdf_get_integer (pdf_file->root->count) + 1);
eric@59 183
eric@59 184 page->last_XObject_name = '@'; /* first name will be "ImA" */
eric@59 185
eric@59 186 return (page);
eric@59 187 }
eric@59 188
eric@59 189 void pdf_close_page (pdf_page_handle pdf_page)
eric@59 190 {
eric@59 191 }
eric@59 192
eric@59 193
eric@59 194 void pdf_set_page_number (pdf_page_handle pdf_page, char *page_number)
eric@59 195 {
eric@59 196 }
eric@59 197
eric@59 198 void pdf_bookmark (pdf_page_handle pdf_page, int level, char *name)
eric@59 199 {
eric@59 200 }