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 #include <libgnomevfs/gnome-vfs-ops.h>
  24
  25 #include <ev-document.h>
  26 #include <ev-document-thumbnails.h>
  27 #include <ev-async-renderer.h>
  28 #include <ev-document-factory.h>
  29
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #define THUMBNAIL_SIZE 128
  34
  35 struct AsyncData {
  36         EvDocument  *document;
  37         const gchar *output;
  38         gint         size;
  39         gboolean     success;
  40 };
  41
  42 static EvDocument *
  43 evince_thumbnailer_get_document (const gchar *uri)
  44 {
  45         EvDocument *document = NULL;
  46         GError     *error = NULL;
  47
  48         document = ev_document_factory_get_document  (uri, &error);
  49         if (error) {
  50                 if (error->domain == EV_DOCUMENT_ERROR &&
  51                     error->code == EV_DOCUMENT_ERROR_ENCRYPTED) {
  52                         /* FIXME: Create a thumb for cryp docs */
  53                         g_error_free (error);
  54                         return NULL;
  55                 }
  56                 g_error_free (error);
  57                 return NULL;
  58         }
  59
  60         return document;
  61 }
  62
  63 static gboolean
  64 evince_thumbnail_pngenc_get (EvDocument *document, const char *thumbnail, int size)
  65 {
  66         EvRenderContext *rc;
  67         double width, height;
  68         GdkPixbuf *pixbuf;
  69
  70         ev_document_get_page_size (document, 0, &width, &height);
  71
  72         rc = ev_render_context_new (0, 0, size / width);
  73         pixbuf = ev_document_thumbnails_get_thumbnail (EV_DOCUMENT_THUMBNAILS (document),
  74                                                        rc, FALSE);
  75         g_object_unref (rc);
  76
  77         if (pixbuf != NULL) {
  78                 const char *overlaid_icon_name = NULL;
  79
  80                 if (overlaid_icon_name) {
  81                         GdkPixbuf *overlaid_pixbuf;
  82
  83                         gchar *overlaid_icon_path = g_strdup_printf ("%s/%s", DATADIR, overlaid_icon_name);
  84                         overlaid_pixbuf = gdk_pixbuf_new_from_file (overlaid_icon_path, NULL);
  85                         g_free (overlaid_icon_path);
  86                         if (overlaid_pixbuf != NULL) {
  87                                 int delta_height, delta_width;
  88
  89                                 delta_width = gdk_pixbuf_get_width (pixbuf) -
  90                                         gdk_pixbuf_get_width (overlaid_pixbuf);
  91                                 delta_height = gdk_pixbuf_get_height (pixbuf) -
  92                                         gdk_pixbuf_get_height (overlaid_pixbuf);
  93
  94                                 gdk_pixbuf_composite (overlaid_pixbuf, pixbuf,
  95                                                       delta_width, delta_height,
  96                                                       gdk_pixbuf_get_width (overlaid_pixbuf),
  97                                                       gdk_pixbuf_get_height (overlaid_pixbuf),
  98                                                       delta_width, delta_height,
  99                                                       1, 1,
 100                                                       GDK_INTERP_NEAREST, 100);
 101
 102                                 g_object_unref  (overlaid_pixbuf);
 103                         }
 104                 }
 105
 106                 if (gdk_pixbuf_save (pixbuf, thumbnail, "png", NULL, NULL)) {
 107                         g_object_unref  (pixbuf);
 108                         return TRUE;
 109                 }
 110
 111                 g_object_unref  (pixbuf);
 112         }
 113
 114         return FALSE;
 115 }
 116
 117 static gpointer
 118 evince_thumbnail_pngenc_get_async (struct AsyncData *data)
 119 {
 120         ev_document_doc_mutex_lock ();
 121         data->success = evince_thumbnail_pngenc_get (data->document,
 122                                                      data->output,
 123                                                      data->size);
 124         ev_document_doc_mutex_unlock ();
 125
 126         g_idle_add ((GSourceFunc)gtk_main_quit, NULL);
 127
 128         return NULL;
 129 }
 130
 131 int
 132 main (int argc, char *argv[])
 133 {
 134         EvDocument *document;
 135         const char *input;
 136         const char *output;
 137         int         size;
 138         char       *uri;
 139
 140         if (argc <= 2 || argc > 5 || strcmp (argv[1], "-h") == 0 ||
 141             strcmp (argv[1], "--help") == 0) {
 142                 g_print ("Usage: %s [-s <size>] <input> <output>\n", argv[0]);
 143                 return -1;
 144         }
 145
 146         if (!strcmp (argv[1], "-s")) {
 147                 input = argv[3];
 148                 output = argv[4];
 149                 size = atoi (argv[2]);
 150         } else {
 151                 input = argv[1];
 152                 output = argv[2];
 153                 size = THUMBNAIL_SIZE;
 154         }
 155
 156         if (size < 40) {
 157                 g_print ("Size cannot be smaller than 40 pixels\n");
 158                 return -1;
 159         }
 160
 161         if (!g_thread_supported ())
 162                 g_thread_init (NULL);
 163
 164         gnome_vfs_init ();
 165
 166         uri = gnome_vfs_make_uri_from_shell_arg (input);
 167         document = evince_thumbnailer_get_document (uri);
 168         g_free (uri);
 169
 170         if (!document)
 171                 return -2;
 172
 173         if (!EV_IS_DOCUMENT_THUMBNAILS (document)) {
 174                 g_object_unref (document);
 175                 return FALSE;
 176         }
 177
 178         if (EV_IS_ASYNC_RENDERER (document)) {
 179                 struct AsyncData data;
 180
 181                 gtk_init (&argc, &argv);
 182
 183                 data.document = document;
 184                 data.output = output;
 185                 data.size = size;
 186
 187                 g_thread_create ((GThreadFunc) evince_thumbnail_pngenc_get_async,
 188                                  &data, FALSE, NULL);
 189
 190                 gtk_main ();
 191
 192                 g_object_unref (document);
 193
 194                 return data.success ? 0 : -2;
 195         }
 196
 197         if (!evince_thumbnail_pngenc_get (document, output, size)) {
 198                 g_object_unref (document);
 199                 return -2;
 200         }
 201
 202         g_object_unref (document);
 203
 204         return 0;
 205 }