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