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         char *mime_type;
  37         GError *error = NULL;
  38         GdkPixbuf *pixbuf;
  39         GType document_type;
  40
  41         mime_type = gnome_vfs_get_mime_type (uri);
  42         if (mime_type == NULL)
  43                 return FALSE;
  44
  45         document_type = ev_document_type_lookup (mime_type);
  46         if (document_type==G_TYPE_INVALID)
  47                 return FALSE;
  48
  49         document = g_object_new (document_type, NULL);
  50
  51         if (!ev_document_load (document, uri, &error)) {
  52                 if (error->domain == EV_DOCUMENT_ERROR &&
  53                     error->code == EV_DOCUMENT_ERROR_ENCRYPTED) {
  54                         /* FIXME: Create a thumb for cryp docs */
  55                 }
  56                 g_error_free (error);
  57                 return FALSE;
  58         }
  59
  60         if (!EV_IS_DOCUMENT_THUMBNAILS (document)) {
  61                 return FALSE;
  62         }
  63
  64         pixbuf = ev_document_thumbnails_get_thumbnail
  65                         (EV_DOCUMENT_THUMBNAILS (document), 1, size, FALSE);
  66
  67         if (pixbuf != NULL) {
  68                 const char *overlaid_icon_name = NULL;
  69
  70                 if (strcmp(mime_type,"application/pdf")==0) {
  71                         overlaid_icon_name = "pdf-icon.png";
  72                 }
  73
  74                 if (overlaid_icon_name) {
  75                         GdkPixbuf *overlaid_pixbuf;
  76
  77                         gchar *overlaid_icon_path = g_strdup_printf ("%s/%s", DATADIR, overlaid_icon_name);
  78                         overlaid_pixbuf = gdk_pixbuf_new_from_file (overlaid_icon_path, NULL);
  79                         g_free (overlaid_icon_path);
  80                         if (overlaid_pixbuf != NULL) {
  81                                 int delta_height, delta_width;
  82
  83                                 delta_width = gdk_pixbuf_get_width (pixbuf) -
  84                                         gdk_pixbuf_get_width (overlaid_pixbuf);
  85                                 delta_height = gdk_pixbuf_get_height (pixbuf) -
  86                                         gdk_pixbuf_get_height (overlaid_pixbuf);
  87
  88                                 gdk_pixbuf_composite (overlaid_pixbuf, pixbuf,
  89                                                       delta_width, delta_height,
  90                                                       gdk_pixbuf_get_width (overlaid_pixbuf),
  91                                                       gdk_pixbuf_get_height (overlaid_pixbuf),
  92                                                       delta_width, delta_height,
  93                                                       1, 1,
  94                                                       GDK_INTERP_NEAREST, 100);
  95
  96                                 gdk_pixbuf_unref  (overlaid_pixbuf);
  97                         }
  98                 }
  99                 if (gdk_pixbuf_save (pixbuf, thumbnail, "png", NULL, NULL)) {
 100                         gdk_pixbuf_unref  (pixbuf);
 101                         g_object_unref (document);
 102                         return TRUE;
 103                 } else {
 104                         gdk_pixbuf_unref  (pixbuf);
 105                         g_object_unref (document);
 106                 }
 107         }
 108         return FALSE;
 109 }
 110
 111 int
 112 main (int argc, char *argv[])
 113 {
 114         int res;
 115         char *input, *output;
 116         int size;
 117         char *uri;
 118
 119         if (argc <= 2 || argc > 5 || strcmp (argv[1], "-h") == 0 ||
 120             strcmp (argv[1], "--help") == 0) {
 121                 g_print ("Usage: %s [-s <size>] <input> <output>\n", argv[0]);
 122                 return -1;
 123         }
 124
 125         res = gnome_vfs_init ();
 126
 127         if (!strcmp (argv[1], "-s")) {
 128                 input = argv[3];
 129                 output = argv[4];
 130                 size = g_strtod (argv[2], NULL);
 131         } else {
 132                 input = argv[1];
 133                 output = argv[2];
 134                 size = THUMBNAIL_SIZE;
 135         }
 136
 137         if (size < 40) {
 138                 g_print ("Size cannot be smaller than 40 pixels\n");
 139                 return -1;
 140         }
 141
 142         uri = gnome_vfs_make_uri_from_shell_arg (input);
 143
 144         if (evince_thumbnail_pngenc_get (uri, output, size)) {
 145                 g_free (uri);
 146                 return 0;
 147         } else {
 148                 g_free (uri);
 149                 return -2;
 150         }
 151 }