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 <config.h>
  20
  21 #include <evince-document.h>
  22
  23 #include <gio/gio.h>
  24
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #define THUMBNAIL_SIZE 128
  29
  30 static gint size = THUMBNAIL_SIZE;
  31 static const gchar **file_arguments;
  32
  33 static const GOptionEntry goption_options[] = {
  34         { "size", 's', 0, G_OPTION_ARG_INT, &size, NULL, "SIZE" },
  35         { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &file_arguments, NULL, "<input> <ouput>" },
  36         { NULL }
  37 };
  38
  39 struct AsyncData {
  40         EvDocument  *document;
  41         const gchar *output;
  42         gint         size;
  43         gboolean     success;
  44 };
  45
  46 static EvDocument *
  47 evince_thumbnailer_get_document (const gchar *uri)
  48 {
  49         EvDocument *document = NULL;
  50         GError     *error = NULL;
  51
  52         document = ev_document_factory_get_document  (uri, &error);
  53         if (error) {
  54                 if (error->domain == EV_DOCUMENT_ERROR &&
  55                     error->code == EV_DOCUMENT_ERROR_ENCRYPTED) {
  56                         /* FIXME: Create a thumb for cryp docs */
  57                         g_error_free (error);
  58                         return NULL;
  59                 }
  60                 g_error_free (error);
  61                 return NULL;
  62         }
  63
  64         return document;
  65 }
  66
  67 static gboolean
  68 evince_thumbnail_pngenc_get (EvDocument *document, const char *thumbnail, int size)
  69 {
  70         EvRenderContext *rc;
  71         double width, height;
  72         GdkPixbuf *pixbuf;
  73         EvPage *page;
  74
  75         page = ev_document_get_page (document, 0);
  76
  77         ev_document_get_page_size (document, page, &width, &height);
  78
  79         rc = ev_render_context_new (page, 0, size / width);
  80         pixbuf = ev_document_thumbnails_get_thumbnail (EV_DOCUMENT_THUMBNAILS (document),
  81                                                        rc, FALSE);
  82         g_object_unref (rc);
  83         g_object_unref (page);
  84
  85         if (pixbuf != NULL) {
  86                 const char *overlaid_icon_name = NULL;
  87
  88                 if (overlaid_icon_name) {
  89                         GdkPixbuf *overlaid_pixbuf;
  90
  91 #ifdef G_OS_WIN32
  92                         gchar *dir = g_win32_get_package_installation_directory_of_module (NULL);
  93                         gchar *overlaid_icon_path = g_build_filename (dir, "share", "evince", overlaid_icon_name, NULL);
  94                         g_free (dir);
  95 #else
  96                         gchar *overlaid_icon_path = g_strdup_printf ("%s/%s", DATADIR, overlaid_icon_name);
  97 #endif
  98                         overlaid_pixbuf = gdk_pixbuf_new_from_file (overlaid_icon_path, NULL);
  99                         g_free (overlaid_icon_path);
 100                         if (overlaid_pixbuf != NULL) {
 101                                 int delta_height, delta_width;
 102
 103                                 delta_width = gdk_pixbuf_get_width (pixbuf) -
 104                                         gdk_pixbuf_get_width (overlaid_pixbuf);
 105                                 delta_height = gdk_pixbuf_get_height (pixbuf) -
 106                                         gdk_pixbuf_get_height (overlaid_pixbuf);
 107
 108                                 gdk_pixbuf_composite (overlaid_pixbuf, pixbuf,
 109                                                       delta_width, delta_height,
 110                                                       gdk_pixbuf_get_width (overlaid_pixbuf),
 111                                                       gdk_pixbuf_get_height (overlaid_pixbuf),
 112                                                       delta_width, delta_height,
 113                                                       1, 1,
 114                                                       GDK_INTERP_NEAREST, 100);
 115
 116                                 g_object_unref  (overlaid_pixbuf);
 117                         }
 118                 }
 119
 120                 if (gdk_pixbuf_save (pixbuf, thumbnail, "png", NULL, NULL)) {
 121                         g_object_unref  (pixbuf);
 122                         return TRUE;
 123                 }
 124
 125                 g_object_unref  (pixbuf);
 126         }
 127
 128         return FALSE;
 129 }
 130
 131 static gpointer
 132 evince_thumbnail_pngenc_get_async (struct AsyncData *data)
 133 {
 134         ev_document_doc_mutex_lock ();
 135         data->success = evince_thumbnail_pngenc_get (data->document,
 136                                                      data->output,
 137                                                      data->size);
 138         ev_document_doc_mutex_unlock ();
 139
 140         g_idle_add ((GSourceFunc)gtk_main_quit, NULL);
 141
 142         return NULL;
 143 }
 144
 145 static void
 146 print_usage (GOptionContext *context)
 147 {
 148         gchar *help;
 149
 150         help = g_option_context_get_help (context, TRUE, NULL);
 151         g_print ("%s", help);
 152         g_free (help);
 153 }
 154
 155 int
 156 main (int argc, char *argv[])
 157 {
 158         EvDocument     *document;
 159         GOptionContext *context;
 160         const char     *input;
 161         const char     *output;
 162         char           *uri;
 163         GFile          *file;
 164         GError         *error = NULL;
 165
 166         context = g_option_context_new ("- GNOME Document Thumbnailer");
 167         g_option_context_add_main_entries (context, goption_options, NULL);
 168
 169         if (!g_option_context_parse (context, &argc, &argv, &error)) {
 170                 g_printerr ("%s\n", error->message);
 171                 g_error_free (error);
 172                 print_usage (context);
 173                 g_option_context_free (context);
 174
 175                 return -1;
 176         }
 177
 178         input = file_arguments ? file_arguments[0] : NULL;
 179         output = input ? file_arguments[1] : NULL;
 180         if (!input || !output) {
 181                 print_usage (context);
 182                 g_option_context_free (context);
 183
 184                 return -1;
 185         }
 186
 187         g_option_context_free (context);
 188
 189         if (size < 1) {
 190                 g_print ("Size cannot be smaller than 1 pixel\n");
 191                 return -1;
 192         }
 193
 194         input = file_arguments[0];
 195         output = file_arguments[1];
 196
 197         g_type_init ();
 198
 199         if (!g_thread_supported ())
 200                 g_thread_init (NULL);
 201
 202         if (!ev_init ())
 203                 return -1;
 204
 205         file = g_file_new_for_commandline_arg (input);
 206         uri = g_file_get_uri (file);
 207         document = evince_thumbnailer_get_document (uri);
 208
 209         g_object_unref (file);
 210         g_free (uri);
 211
 212         if (!document) {
 213                 ev_shutdown ();
 214                 return -2;
 215         }
 216
 217         if (!EV_IS_DOCUMENT_THUMBNAILS (document)) {
 218                 g_object_unref (document);
 219                 ev_shutdown ();
 220                 return -2;
 221         }
 222
 223         if (EV_IS_ASYNC_RENDERER (document)) {
 224                 struct AsyncData data;
 225
 226                 gtk_init (&argc, &argv);
 227
 228                 data.document = document;
 229                 data.output = output;
 230                 data.size = size;
 231
 232                 g_thread_create ((GThreadFunc) evince_thumbnail_pngenc_get_async,
 233                                  &data, FALSE, NULL);
 234
 235                 gtk_main ();
 236
 237                 g_object_unref (document);
 238                 ev_shutdown ();
 239
 240                 return data.success ? 0 : -2;
 241         }
 242
 243         if (!evince_thumbnail_pngenc_get (document, output, size)) {
 244                 g_object_unref (document);
 245                 ev_shutdown ();
 246                 return -2;
 247         }
 248
 249         g_object_unref (document);
 250         ev_shutdown ();
 251
 252         return 0;
 253 }