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                         gchar *overlaid_icon_path = g_strdup_printf ("%s/%s", DATADIR, overlaid_icon_name);
  92                         overlaid_pixbuf = gdk_pixbuf_new_from_file (overlaid_icon_path, NULL);
  93                         g_free (overlaid_icon_path);
  94                         if (overlaid_pixbuf != NULL) {
  95                                 int delta_height, delta_width;
  96
  97                                 delta_width = gdk_pixbuf_get_width (pixbuf) -
  98                                         gdk_pixbuf_get_width (overlaid_pixbuf);
  99                                 delta_height = gdk_pixbuf_get_height (pixbuf) -
 100                                         gdk_pixbuf_get_height (overlaid_pixbuf);
 101
 102                                 gdk_pixbuf_composite (overlaid_pixbuf, pixbuf,
 103                                                       delta_width, delta_height,
 104                                                       gdk_pixbuf_get_width (overlaid_pixbuf),
 105                                                       gdk_pixbuf_get_height (overlaid_pixbuf),
 106                                                       delta_width, delta_height,
 107                                                       1, 1,
 108                                                       GDK_INTERP_NEAREST, 100);
 109
 110                                 g_object_unref  (overlaid_pixbuf);
 111                         }
 112                 }
 113
 114                 if (gdk_pixbuf_save (pixbuf, thumbnail, "png", NULL, NULL)) {
 115                         g_object_unref  (pixbuf);
 116                         return TRUE;
 117                 }
 118
 119                 g_object_unref  (pixbuf);
 120         }
 121
 122         return FALSE;
 123 }
 124
 125 static gpointer
 126 evince_thumbnail_pngenc_get_async (struct AsyncData *data)
 127 {
 128         ev_document_doc_mutex_lock ();
 129         data->success = evince_thumbnail_pngenc_get (data->document,
 130                                                      data->output,
 131                                                      data->size);
 132         ev_document_doc_mutex_unlock ();
 133
 134         g_idle_add ((GSourceFunc)gtk_main_quit, NULL);
 135
 136         return NULL;
 137 }
 138
 139 static void
 140 print_usage (GOptionContext *context)
 141 {
 142         gchar *help;
 143
 144         help = g_option_context_get_help (context, TRUE, NULL);
 145         g_print ("%s", help);
 146         g_free (help);
 147 }
 148
 149 int
 150 main (int argc, char *argv[])
 151 {
 152         EvDocument     *document;
 153         GOptionContext *context;
 154         const char     *input;
 155         const char     *output;
 156         char           *uri;
 157         GFile          *file;
 158         GError         *error = NULL;
 159
 160         context = g_option_context_new ("- GNOME Document Thumbnailer");
 161         g_option_context_add_main_entries (context, goption_options, NULL);
 162
 163         if (!g_option_context_parse (context, &argc, &argv, &error)) {
 164                 g_printerr ("%s\n", error->message);
 165                 g_error_free (error);
 166                 print_usage (context);
 167                 g_option_context_free (context);
 168
 169                 return -1;
 170         }
 171
 172         input = file_arguments ? file_arguments[0] : NULL;
 173         output = input ? file_arguments[1] : NULL;
 174         if (!input || !output) {
 175                 print_usage (context);
 176                 g_option_context_free (context);
 177
 178                 return -1;
 179         }
 180
 181         g_option_context_free (context);
 182
 183         if (size < 1) {
 184                 g_print ("Size cannot be smaller than 1 pixel\n");
 185                 return -1;
 186         }
 187
 188         input = file_arguments[0];
 189         output = file_arguments[1];
 190
 191         g_type_init ();
 192
 193         if (!g_thread_supported ())
 194                 g_thread_init (NULL);
 195
 196         if (!ev_init ())
 197                 return -1;
 198
 199         file = g_file_new_for_commandline_arg (input);
 200         uri = g_file_get_uri (file);
 201         document = evince_thumbnailer_get_document (uri);
 202
 203         g_object_unref (file);
 204         g_free (uri);
 205
 206         if (!document) {
 207                 ev_shutdown ();
 208                 return -2;
 209         }
 210
 211         if (!EV_IS_DOCUMENT_THUMBNAILS (document)) {
 212                 g_object_unref (document);
 213                 ev_shutdown ();
 214                 return -2;
 215         }
 216
 217         if (EV_IS_ASYNC_RENDERER (document)) {
 218                 struct AsyncData data;
 219
 220                 gtk_init (&argc, &argv);
 221
 222                 data.document = document;
 223                 data.output = output;
 224                 data.size = size;
 225
 226                 g_thread_create ((GThreadFunc) evince_thumbnail_pngenc_get_async,
 227                                  &data, FALSE, NULL);
 228
 229                 gtk_main ();
 230
 231                 g_object_unref (document);
 232                 ev_shutdown ();
 233
 234                 return data.success ? 0 : -2;
 235         }
 236
 237         if (!evince_thumbnail_pngenc_get (document, output, size)) {
 238                 g_object_unref (document);
 239                 ev_shutdown ();
 240                 return -2;
 241         }
 242
 243         g_object_unref (document);
 244         ev_shutdown ();
 245
 246         return 0;
 247 }