thumbnailer/evince-thumbnailer.c

   1 /*
   2    Copyright (C) 2005 Fernando Herrera <fherrera@onirica.com>
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17 */
  18
  19 #include <libgnomevfs/gnome-vfs-mime-utils.h>
  20 #include <libgnomevfs/gnome-vfs-uri.h>
  21 #include <libgnomevfs/gnome-vfs-utils.h>
  22 #include <libgnomevfs/gnome-vfs-init.h>
  23
  24 #include <ev-document.h>
  25 #include <ev-document-types.h>
  26 #include <ev-document-thumbnails.h>
  27
  28 #include <string.h>
  29
  30 #define THUMBNAIL_SIZE 128
  31
  32 static gboolean
  33 evince_thumbnail_pngenc_get (const char *uri, const char *thumbnail, int size)
  34 {
  35         EvDocument *document = NULL;
  36         GError *error = NULL;
  37         GdkPixbuf *pixbuf;
  38         GType document_type;
  39         char *mime_type = NULL;
  40
  41         document_type = ev_document_type_lookup (uri, &mime_type);
  42         if (document_type == G_TYPE_INVALID)
  43                 return FALSE;
  44
  45         document = g_object_new (document_type, NULL);
  46
  47         if (!ev_document_load (document, uri, &error)) {
  48                 if (error->domain == EV_DOCUMENT_ERROR &&
  49                     error->code == EV_DOCUMENT_ERROR_ENCRYPTED) {
  50                         /* FIXME: Create a thumb for cryp docs */
  51                 }
  52                 g_error_free (error);
  53                 return FALSE;
  54         }
  55
  56         if (!EV_IS_DOCUMENT_THUMBNAILS (document)) {
  57                 return FALSE;
  58         }
  59
  60         pixbuf = ev_document_thumbnails_get_thumbnail
  61                         (EV_DOCUMENT_THUMBNAILS (document), 0, size, FALSE);
  62
  63         if (pixbuf != NULL) {
  64                 const char *overlaid_icon_name = NULL;
  65
  66                 if (strcmp (mime_type, "application/pdf") == 0) {
  67                         overlaid_icon_name = "pdf-icon.png";
  68                 }
  69
  70                 if (overlaid_icon_name) {
  71                         GdkPixbuf *overlaid_pixbuf;
  72
  73                         gchar *overlaid_icon_path = g_strdup_printf ("%s/%s", DATADIR, overlaid_icon_name);
  74                         overlaid_pixbuf = gdk_pixbuf_new_from_file (overlaid_icon_path, NULL);
  75                         g_free (overlaid_icon_path);
  76                         if (overlaid_pixbuf != NULL) {
  77                                 int delta_height, delta_width;
  78
  79                                 delta_width = gdk_pixbuf_get_width (pixbuf) -
  80                                         gdk_pixbuf_get_width (overlaid_pixbuf);
  81                                 delta_height = gdk_pixbuf_get_height (pixbuf) -
  82                                         gdk_pixbuf_get_height (overlaid_pixbuf);
  83
  84                                 gdk_pixbuf_composite (overlaid_pixbuf, pixbuf,
  85                                                       delta_width, delta_height,
  86                                                       gdk_pixbuf_get_width (overlaid_pixbuf),
  87                                                       gdk_pixbuf_get_height (overlaid_pixbuf),
  88                                                       delta_width, delta_height,
  89                                                       1, 1,
  90                                                       GDK_INTERP_NEAREST, 100);
  91
  92                                 gdk_pixbuf_unref  (overlaid_pixbuf);
  93                         }
  94                 }
  95                 if (gdk_pixbuf_save (pixbuf, thumbnail, "png", NULL, NULL)) {
  96                         gdk_pixbuf_unref  (pixbuf);
  97                         g_object_unref (document);
  98                         return TRUE;
  99                 } else {
 100                         gdk_pixbuf_unref  (pixbuf);
 101                         g_object_unref (document);
 102                 }
 103         }
 104         return FALSE;
 105 }
 106
 107 int
 108 main (int argc, char *argv[])
 109 {
 110         int res;
 111         char *input, *output;
 112         int size;
 113         char *uri;
 114
 115         if (argc <= 2 || argc > 5 || strcmp (argv[1], "-h") == 0 ||
 116             strcmp (argv[1], "--help") == 0) {
 117                 g_print ("Usage: %s [-s <size>] <input> <output>\n", argv[0]);
 118                 return -1;
 119         }
 120
 121         res = gnome_vfs_init ();
 122
 123         if (!strcmp (argv[1], "-s")) {
 124                 input = argv[3];
 125                 output = argv[4];
 126                 size = g_strtod (argv[2], NULL);
 127         } else {
 128                 input = argv[1];
 129                 output = argv[2];
 130                 size = THUMBNAIL_SIZE;
 131         }
 132
 133         if (size < 40) {
 134                 g_print ("Size cannot be smaller than 40 pixels\n");
 135                 return -1;
 136         }
 137
 138         uri = gnome_vfs_make_uri_from_shell_arg (input);
 139
 140         if (evince_thumbnail_pngenc_get (uri, output, size)) {
 141                 g_free (uri);
 142                 return 0;
 143         } else {
 144                 g_free (uri);
 145                 return -2;
 146         }
 147 }