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 #ifdef G_OS_WIN32
  29 #ifdef DATADIR
  30 #undef DATADIR
  31 #endif
  32 #include <io.h>
  33 #include <conio.h>
  34 #define _WIN32_WINNT 0x0500
  35 #include <windows.h>
  36 #endif
  37
  38 #define THUMBNAIL_SIZE 128
  39
  40 static gint size = THUMBNAIL_SIZE;
  41 static const gchar **file_arguments;
  42
  43 static const GOptionEntry goption_options[] = {
  44         { "size", 's', 0, G_OPTION_ARG_INT, &size, NULL, "SIZE" },
  45         { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &file_arguments, NULL, "<input> <ouput>" },
  46         { NULL }
  47 };
  48
  49 struct AsyncData {
  50         EvDocument  *document;
  51         const gchar *output;
  52         gint         size;
  53         gboolean     success;
  54 };
  55
  56 static void
  57 delete_temp_file (GFile *file)
  58 {
  59         ev_tmp_file_unlink (file);
  60         g_object_unref (file);
  61 }
  62
  63 static EvDocument *
  64 evince_thumbnailer_get_document (GFile *file)
  65 {
  66         EvDocument *document = NULL;
  67         gchar      *uri;
  68         GFile      *tmp_file = NULL;
  69         GError     *error = NULL;
  70
  71         if (!g_file_is_native (file)) {
  72                 gchar *base_name, *template;
  73
  74                 base_name = g_file_get_basename (file);
  75                 template = g_strdup_printf ("document.XXXXXX-%s", base_name);
  76                 g_free (base_name);
  77
  78                 tmp_file = ev_mkstemp_file (template, &error);
  79                 g_free (template);
  80                 if (!tmp_file) {
  81                         g_printerr ("Error loading remote document: %s\n", error->message);
  82                         g_error_free (error);
  83
  84                         return NULL;
  85                 }
  86
  87                 g_file_copy (file, tmp_file, G_FILE_COPY_OVERWRITE,
  88                              NULL, NULL, NULL, &error);
  89                 if (error) {
  90                         g_printerr ("Error loading remote document: %s\n", error->message);
  91                         g_error_free (error);
  92                         g_object_unref (tmp_file);
  93
  94                         return NULL;
  95                 }
  96                 uri = g_file_get_uri (tmp_file);
  97         } else {
  98                 uri = g_file_get_uri (file);
  99         }
 100
 101         document = ev_document_factory_get_document (uri, &error);
 102         if (tmp_file) {
 103                 if (document) {
 104                         g_object_weak_ref (G_OBJECT (document),
 105                                            (GWeakNotify)delete_temp_file,
 106                                            tmp_file);
 107                 } else {
 108                         ev_tmp_file_unlink (tmp_file);
 109                         g_object_unref (tmp_file);
 110                 }
 111         }
 112         g_free (uri);
 113         if (error) {
 114                 if (error->domain == EV_DOCUMENT_ERROR &&
 115                     error->code == EV_DOCUMENT_ERROR_ENCRYPTED) {
 116                         /* FIXME: Create a thumb for cryp docs */
 117                         g_error_free (error);
 118                         return NULL;
 119                 }
 120                 g_printerr ("Error loading document: %s\n", error->message);
 121                 g_error_free (error);
 122                 return NULL;
 123         }
 124
 125         return document;
 126 }
 127
 128 static gboolean
 129 evince_thumbnail_pngenc_get (EvDocument *document, const char *thumbnail, int size)
 130 {
 131         EvRenderContext *rc;
 132         double width, height;
 133         GdkPixbuf *pixbuf;
 134         EvPage *page;
 135
 136         page = ev_document_get_page (document, 0);
 137
 138         ev_document_get_page_size (document, 0, &width, &height);
 139
 140         rc = ev_render_context_new (page, 0, size / width);
 141         pixbuf = ev_document_thumbnails_get_thumbnail (EV_DOCUMENT_THUMBNAILS (document),
 142                                                        rc, FALSE);
 143         g_object_unref (rc);
 144         g_object_unref (page);
 145
 146         if (pixbuf != NULL) {
 147                 const char *overlaid_icon_name = NULL;
 148
 149                 if (overlaid_icon_name) {
 150                         GdkPixbuf *overlaid_pixbuf;
 151
 152 #ifdef G_OS_WIN32
 153                         gchar *dir = g_win32_get_package_installation_directory_of_module (NULL);
 154                         gchar *overlaid_icon_path = g_build_filename (dir, "share", "evince", overlaid_icon_name, NULL);
 155                         g_free (dir);
 156 #else
 157                         gchar *overlaid_icon_path = g_strdup_printf ("%s/%s", DATADIR, overlaid_icon_name);
 158 #endif
 159                         overlaid_pixbuf = gdk_pixbuf_new_from_file (overlaid_icon_path, NULL);
 160                         g_free (overlaid_icon_path);
 161                         if (overlaid_pixbuf != NULL) {
 162                                 int delta_height, delta_width;
 163
 164                                 delta_width = gdk_pixbuf_get_width (pixbuf) -
 165                                         gdk_pixbuf_get_width (overlaid_pixbuf);
 166                                 delta_height = gdk_pixbuf_get_height (pixbuf) -
 167                                         gdk_pixbuf_get_height (overlaid_pixbuf);
 168
 169                                 gdk_pixbuf_composite (overlaid_pixbuf, pixbuf,
 170                                                       delta_width, delta_height,
 171                                                       gdk_pixbuf_get_width (overlaid_pixbuf),
 172                                                       gdk_pixbuf_get_height (overlaid_pixbuf),
 173                                                       delta_width, delta_height,
 174                                                       1, 1,
 175                                                       GDK_INTERP_NEAREST, 100);
 176
 177                                 g_object_unref  (overlaid_pixbuf);
 178                         }
 179                 }
 180
 181                 if (gdk_pixbuf_save (pixbuf, thumbnail, "png", NULL, NULL)) {
 182                         g_object_unref  (pixbuf);
 183                         return TRUE;
 184                 }
 185
 186                 g_object_unref  (pixbuf);
 187         }
 188
 189         return FALSE;
 190 }
 191
 192 static gpointer
 193 evince_thumbnail_pngenc_get_async (struct AsyncData *data)
 194 {
 195         ev_document_doc_mutex_lock ();
 196         data->success = evince_thumbnail_pngenc_get (data->document,
 197                                                      data->output,
 198                                                      data->size);
 199         ev_document_doc_mutex_unlock ();
 200
 201         g_idle_add ((GSourceFunc)gtk_main_quit, NULL);
 202
 203         return NULL;
 204 }
 205
 206 static void
 207 print_usage (GOptionContext *context)
 208 {
 209         gchar *help;
 210
 211         help = g_option_context_get_help (context, TRUE, NULL);
 212         g_print ("%s", help);
 213         g_free (help);
 214 }
 215
 216 int
 217 main (int argc, char *argv[])
 218 {
 219         EvDocument     *document;
 220         GOptionContext *context;
 221         const char     *input;
 222         const char     *output;
 223         GFile          *file;
 224         GError         *error = NULL;
 225
 226         context = g_option_context_new ("- GNOME Document Thumbnailer");
 227         g_option_context_add_main_entries (context, goption_options, NULL);
 228
 229         if (!g_option_context_parse (context, &argc, &argv, &error)) {
 230                 g_printerr ("%s\n", error->message);
 231                 g_error_free (error);
 232                 print_usage (context);
 233                 g_option_context_free (context);
 234
 235                 return -1;
 236         }
 237
 238         input = file_arguments ? file_arguments[0] : NULL;
 239         output = input ? file_arguments[1] : NULL;
 240         if (!input || !output) {
 241                 print_usage (context);
 242                 g_option_context_free (context);
 243
 244                 return -1;
 245         }
 246
 247         g_option_context_free (context);
 248
 249         if (size < 1) {
 250                 g_print ("Size cannot be smaller than 1 pixel\n");
 251                 return -1;
 252         }
 253
 254         input = file_arguments[0];
 255         output = file_arguments[1];
 256
 257         g_type_init ();
 258
 259         if (!g_thread_supported ())
 260                 g_thread_init (NULL);
 261
 262         if (!ev_init ())
 263                 return -1;
 264
 265         file = g_file_new_for_commandline_arg (input);
 266         document = evince_thumbnailer_get_document (file);
 267         g_object_unref (file);
 268
 269         if (!document) {
 270                 ev_shutdown ();
 271                 return -2;
 272         }
 273
 274         if (!EV_IS_DOCUMENT_THUMBNAILS (document)) {
 275                 g_object_unref (document);
 276                 ev_shutdown ();
 277                 return -2;
 278         }
 279
 280         if (EV_IS_ASYNC_RENDERER (document)) {
 281                 struct AsyncData data;
 282
 283                 gtk_init (&argc, &argv);
 284
 285                 data.document = document;
 286                 data.output = output;
 287                 data.size = size;
 288
 289                 g_thread_create ((GThreadFunc) evince_thumbnail_pngenc_get_async,
 290                                  &data, FALSE, NULL);
 291
 292                 gtk_main ();
 293
 294                 g_object_unref (document);
 295                 ev_shutdown ();
 296
 297                 return data.success ? 0 : -2;
 298         }
 299
 300         if (!evince_thumbnail_pngenc_get (document, output, size)) {
 301                 g_object_unref (document);
 302                 ev_shutdown ();
 303                 return -2;
 304         }
 305
 306         g_object_unref (document);
 307         ev_shutdown ();
 308
 309         return 0;
 310 }