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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 #if !(_WIN32_WINNT >= 0x0500)
  35 #error "_WIN32_WINNT must be defined >= 0x0500"
  36 #endif
  37 #include <windows.h>
  38 #endif
  39
  40 #define THUMBNAIL_SIZE 128
  41
  42 static gint size = THUMBNAIL_SIZE;
  43 static const gchar **file_arguments;
  44
  45 static const GOptionEntry goption_options[] = {
  46         { "size", 's', 0, G_OPTION_ARG_INT, &size, NULL, "SIZE" },
  47         { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &file_arguments, NULL, "<input> <ouput>" },
  48         { NULL }
  49 };
  50
  51 struct AsyncData {
  52         EvDocument  *document;
  53         const gchar *output;
  54         gint         size;
  55         gboolean     success;
  56 };
  57
  58 static void
  59 delete_temp_file (GFile *file)
  60 {
  61         ev_tmp_file_unlink (file);
  62         g_object_unref (file);
  63 }
  64
  65 static EvDocument *
  66 evince_thumbnailer_get_document (GFile *file)
  67 {
  68         EvDocument *document = NULL;
  69         gchar      *uri;
  70         GFile      *tmp_file = NULL;
  71         GError     *error = NULL;
  72
  73         if (!g_file_is_native (file)) {
  74                 gchar *base_name, *template;
  75
  76                 base_name = g_file_get_basename (file);
  77                 template = g_strdup_printf ("document.XXXXXX-%s", base_name);
  78                 g_free (base_name);
  79
  80                 tmp_file = ev_mkstemp_file (template, &error);
  81                 g_free (template);
  82                 if (!tmp_file) {
  83                         g_printerr ("Error loading remote document: %s\n", error->message);
  84                         g_error_free (error);
  85
  86                         return NULL;
  87                 }
  88
  89                 g_file_copy (file, tmp_file, G_FILE_COPY_OVERWRITE,
  90                              NULL, NULL, NULL, &error);
  91                 if (error) {
  92                         g_printerr ("Error loading remote document: %s\n", error->message);
  93                         g_error_free (error);
  94                         g_object_unref (tmp_file);
  95
  96                         return NULL;
  97                 }
  98                 uri = g_file_get_uri (tmp_file);
  99         } else {
 100                 uri = g_file_get_uri (file);
 101         }
 102
 103         document = ev_document_factory_get_document (uri, &error);
 104         if (tmp_file) {
 105                 if (document) {
 106                         g_object_weak_ref (G_OBJECT (document),
 107                                            (GWeakNotify)delete_temp_file,
 108                                            tmp_file);
 109                 } else {
 110                         ev_tmp_file_unlink (tmp_file);
 111                         g_object_unref (tmp_file);
 112                 }
 113         }
 114         g_free (uri);
 115         if (error) {
 116                 if (error->domain == EV_DOCUMENT_ERROR &&
 117                     error->code == EV_DOCUMENT_ERROR_ENCRYPTED) {
 118                         /* FIXME: Create a thumb for cryp docs */
 119                         g_error_free (error);
 120                         return NULL;
 121                 }
 122                 g_printerr ("Error loading document: %s\n", error->message);
 123                 g_error_free (error);
 124                 return NULL;
 125         }
 126
 127         return document;
 128 }
 129
 130 static gboolean
 131 evince_thumbnail_pngenc_get (EvDocument *document, const char *thumbnail, int size)
 132 {
 133         EvRenderContext *rc;
 134         double width, height;
 135         GdkPixbuf *pixbuf;
 136         EvPage *page;
 137
 138         page = ev_document_get_page (document, 0);
 139
 140         ev_document_get_page_size (document, 0, &width, &height);
 141
 142         rc = ev_render_context_new (page, 0, size / width);
 143         pixbuf = ev_document_thumbnails_get_thumbnail (EV_DOCUMENT_THUMBNAILS (document),
 144                                                        rc, FALSE);
 145         g_object_unref (rc);
 146         g_object_unref (page);
 147
 148         if (pixbuf != NULL) {
 149                 const char *overlaid_icon_name = NULL;
 150
 151                 if (overlaid_icon_name) {
 152                         GdkPixbuf *overlaid_pixbuf;
 153
 154 #ifdef G_OS_WIN32
 155                         gchar *dir = g_win32_get_package_installation_directory_of_module (NULL);
 156                         gchar *overlaid_icon_path = g_build_filename (dir, "share", "evince", overlaid_icon_name, NULL);
 157                         g_free (dir);
 158 #else
 159                         gchar *overlaid_icon_path = g_strdup_printf ("%s/%s", DATADIR, overlaid_icon_name);
 160 #endif
 161                         overlaid_pixbuf = gdk_pixbuf_new_from_file (overlaid_icon_path, NULL);
 162                         g_free (overlaid_icon_path);
 163                         if (overlaid_pixbuf != NULL) {
 164                                 int delta_height, delta_width;
 165
 166                                 delta_width = gdk_pixbuf_get_width (pixbuf) -
 167                                         gdk_pixbuf_get_width (overlaid_pixbuf);
 168                                 delta_height = gdk_pixbuf_get_height (pixbuf) -
 169                                         gdk_pixbuf_get_height (overlaid_pixbuf);
 170
 171                                 gdk_pixbuf_composite (overlaid_pixbuf, pixbuf,
 172                                                       delta_width, delta_height,
 173                                                       gdk_pixbuf_get_width (overlaid_pixbuf),
 174                                                       gdk_pixbuf_get_height (overlaid_pixbuf),
 175                                                       delta_width, delta_height,
 176                                                       1, 1,
 177                                                       GDK_INTERP_NEAREST, 100);
 178
 179                                 g_object_unref  (overlaid_pixbuf);
 180                         }
 181                 }
 182
 183                 if (gdk_pixbuf_save (pixbuf, thumbnail, "png", NULL, NULL)) {
 184                         g_object_unref  (pixbuf);
 185                         return TRUE;
 186                 }
 187
 188                 g_object_unref  (pixbuf);
 189         }
 190
 191         return FALSE;
 192 }
 193
 194 static gpointer
 195 evince_thumbnail_pngenc_get_async (struct AsyncData *data)
 196 {
 197         ev_document_doc_mutex_lock ();
 198         data->success = evince_thumbnail_pngenc_get (data->document,
 199                                                      data->output,
 200                                                      data->size);
 201         ev_document_doc_mutex_unlock ();
 202
 203         g_idle_add ((GSourceFunc)gtk_main_quit, NULL);
 204
 205         return NULL;
 206 }
 207
 208 static void
 209 print_usage (GOptionContext *context)
 210 {
 211         gchar *help;
 212
 213         help = g_option_context_get_help (context, TRUE, NULL);
 214         g_print ("%s", help);
 215         g_free (help);
 216 }
 217
 218 int
 219 main (int argc, char *argv[])
 220 {
 221         EvDocument     *document;
 222         GOptionContext *context;
 223         const char     *input;
 224         const char     *output;
 225         GFile          *file;
 226         GError         *error = NULL;
 227
 228         context = g_option_context_new ("- GNOME Document Thumbnailer");
 229         g_option_context_add_main_entries (context, goption_options, NULL);
 230
 231         if (!g_option_context_parse (context, &argc, &argv, &error)) {
 232                 g_printerr ("%s\n", error->message);
 233                 g_error_free (error);
 234                 print_usage (context);
 235                 g_option_context_free (context);
 236
 237                 return -1;
 238         }
 239
 240         input = file_arguments ? file_arguments[0] : NULL;
 241         output = input ? file_arguments[1] : NULL;
 242         if (!input || !output) {
 243                 print_usage (context);
 244                 g_option_context_free (context);
 245
 246                 return -1;
 247         }
 248
 249         g_option_context_free (context);
 250
 251         if (size < 1) {
 252                 g_print ("Size cannot be smaller than 1 pixel\n");
 253                 return -1;
 254         }
 255
 256         input = file_arguments[0];
 257         output = file_arguments[1];
 258
 259         g_type_init ();
 260
 261         if (!g_thread_supported ())
 262                 g_thread_init (NULL);
 263
 264         if (!ev_init ())
 265                 return -1;
 266
 267         file = g_file_new_for_commandline_arg (input);
 268         document = evince_thumbnailer_get_document (file);
 269         g_object_unref (file);
 270
 271         if (!document) {
 272                 ev_shutdown ();
 273                 return -2;
 274         }
 275
 276         if (!EV_IS_DOCUMENT_THUMBNAILS (document)) {
 277                 g_object_unref (document);
 278                 ev_shutdown ();
 279                 return -2;
 280         }
 281
 282         if (EV_IS_ASYNC_RENDERER (document)) {
 283                 struct AsyncData data;
 284
 285                 gtk_init (&argc, &argv);
 286
 287                 data.document = document;
 288                 data.output = output;
 289                 data.size = size;
 290
 291                 g_thread_create ((GThreadFunc) evince_thumbnail_pngenc_get_async,
 292                                  &data, FALSE, NULL);
 293
 294                 gtk_main ();
 295
 296                 g_object_unref (document);
 297                 ev_shutdown ();
 298
 299                 return data.success ? 0 : -2;
 300         }
 301
 302         if (!evince_thumbnail_pngenc_get (document, output, size)) {
 303                 g_object_unref (document);
 304                 ev_shutdown ();
 305                 return -2;
 306         }
 307
 308         g_object_unref (document);
 309         ev_shutdown ();
 310
 311         return 0;
 312 }