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 EvDocument *
  57 evince_thumbnailer_get_document (const gchar *uri)
  58 {
  59         EvDocument *document = NULL;
  60         GError     *error = NULL;
  61
  62         document = ev_document_factory_get_document  (uri, &error);
  63         if (error) {
  64                 if (error->domain == EV_DOCUMENT_ERROR &&
  65                     error->code == EV_DOCUMENT_ERROR_ENCRYPTED) {
  66                         /* FIXME: Create a thumb for cryp docs */
  67                         g_error_free (error);
  68                         return NULL;
  69                 }
  70                 g_error_free (error);
  71                 return NULL;
  72         }
  73
  74         return document;
  75 }
  76
  77 static gboolean
  78 evince_thumbnail_pngenc_get (EvDocument *document, const char *thumbnail, int size)
  79 {
  80         EvRenderContext *rc;
  81         double width, height;
  82         GdkPixbuf *pixbuf;
  83         EvPage *page;
  84
  85         page = ev_document_get_page (document, 0);
  86
  87         ev_document_get_page_size (document, page, &width, &height);
  88
  89         rc = ev_render_context_new (page, 0, size / width);
  90         pixbuf = ev_document_thumbnails_get_thumbnail (EV_DOCUMENT_THUMBNAILS (document),
  91                                                        rc, FALSE);
  92         g_object_unref (rc);
  93         g_object_unref (page);
  94
  95         if (pixbuf != NULL) {
  96                 const char *overlaid_icon_name = NULL;
  97
  98                 if (overlaid_icon_name) {
  99                         GdkPixbuf *overlaid_pixbuf;
 100
 101 #ifdef G_OS_WIN32
 102                         gchar *dir = g_win32_get_package_installation_directory_of_module (NULL);
 103                         gchar *overlaid_icon_path = g_build_filename (dir, "share", "evince", overlaid_icon_name, NULL);
 104                         g_free (dir);
 105 #else
 106                         gchar *overlaid_icon_path = g_strdup_printf ("%s/%s", DATADIR, overlaid_icon_name);
 107 #endif
 108                         overlaid_pixbuf = gdk_pixbuf_new_from_file (overlaid_icon_path, NULL);
 109                         g_free (overlaid_icon_path);
 110                         if (overlaid_pixbuf != NULL) {
 111                                 int delta_height, delta_width;
 112
 113                                 delta_width = gdk_pixbuf_get_width (pixbuf) -
 114                                         gdk_pixbuf_get_width (overlaid_pixbuf);
 115                                 delta_height = gdk_pixbuf_get_height (pixbuf) -
 116                                         gdk_pixbuf_get_height (overlaid_pixbuf);
 117
 118                                 gdk_pixbuf_composite (overlaid_pixbuf, pixbuf,
 119                                                       delta_width, delta_height,
 120                                                       gdk_pixbuf_get_width (overlaid_pixbuf),
 121                                                       gdk_pixbuf_get_height (overlaid_pixbuf),
 122                                                       delta_width, delta_height,
 123                                                       1, 1,
 124                                                       GDK_INTERP_NEAREST, 100);
 125
 126                                 g_object_unref  (overlaid_pixbuf);
 127                         }
 128                 }
 129
 130                 if (gdk_pixbuf_save (pixbuf, thumbnail, "png", NULL, NULL)) {
 131                         g_object_unref  (pixbuf);
 132                         return TRUE;
 133                 }
 134
 135                 g_object_unref  (pixbuf);
 136         }
 137
 138         return FALSE;
 139 }
 140
 141 static gpointer
 142 evince_thumbnail_pngenc_get_async (struct AsyncData *data)
 143 {
 144         ev_document_doc_mutex_lock ();
 145         data->success = evince_thumbnail_pngenc_get (data->document,
 146                                                      data->output,
 147                                                      data->size);
 148         ev_document_doc_mutex_unlock ();
 149
 150         g_idle_add ((GSourceFunc)gtk_main_quit, NULL);
 151
 152         return NULL;
 153 }
 154
 155 static void
 156 print_usage (GOptionContext *context)
 157 {
 158         gchar *help;
 159
 160         help = g_option_context_get_help (context, TRUE, NULL);
 161         g_print ("%s", help);
 162         g_free (help);
 163 }
 164
 165 int
 166 main (int argc, char *argv[])
 167 {
 168         EvDocument     *document;
 169         GOptionContext *context;
 170         const char     *input;
 171         const char     *output;
 172         char           *uri;
 173         GFile          *file;
 174         GError         *error = NULL;
 175
 176         context = g_option_context_new ("- GNOME Document Thumbnailer");
 177         g_option_context_add_main_entries (context, goption_options, NULL);
 178
 179         if (!g_option_context_parse (context, &argc, &argv, &error)) {
 180                 g_printerr ("%s\n", error->message);
 181                 g_error_free (error);
 182                 print_usage (context);
 183                 g_option_context_free (context);
 184
 185                 return -1;
 186         }
 187
 188         input = file_arguments ? file_arguments[0] : NULL;
 189         output = input ? file_arguments[1] : NULL;
 190         if (!input || !output) {
 191                 print_usage (context);
 192                 g_option_context_free (context);
 193
 194                 return -1;
 195         }
 196
 197         g_option_context_free (context);
 198
 199         if (size < 1) {
 200                 g_print ("Size cannot be smaller than 1 pixel\n");
 201                 return -1;
 202         }
 203
 204         input = file_arguments[0];
 205         output = file_arguments[1];
 206
 207         g_type_init ();
 208
 209         if (!g_thread_supported ())
 210                 g_thread_init (NULL);
 211
 212         if (!ev_init ())
 213                 return -1;
 214
 215         file = g_file_new_for_commandline_arg (input);
 216         uri = g_file_get_uri (file);
 217         document = evince_thumbnailer_get_document (uri);
 218
 219         g_object_unref (file);
 220         g_free (uri);
 221
 222         if (!document) {
 223                 ev_shutdown ();
 224                 return -2;
 225         }
 226
 227         if (!EV_IS_DOCUMENT_THUMBNAILS (document)) {
 228                 g_object_unref (document);
 229                 ev_shutdown ();
 230                 return -2;
 231         }
 232
 233         if (EV_IS_ASYNC_RENDERER (document)) {
 234                 struct AsyncData data;
 235
 236                 gtk_init (&argc, &argv);
 237
 238                 data.document = document;
 239                 data.output = output;
 240                 data.size = size;
 241
 242                 g_thread_create ((GThreadFunc) evince_thumbnail_pngenc_get_async,
 243                                  &data, FALSE, NULL);
 244
 245                 gtk_main ();
 246
 247                 g_object_unref (document);
 248                 ev_shutdown ();
 249
 250                 return data.success ? 0 : -2;
 251         }
 252
 253         if (!evince_thumbnail_pngenc_get (document, output, size)) {
 254                 g_object_unref (document);
 255                 ev_shutdown ();
 256                 return -2;
 257         }
 258
 259         g_object_unref (document);
 260         ev_shutdown ();
 261
 262         return 0;
 263 }