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 <ev-document.h>
  22 #include <ev-document-thumbnails.h>
  23 #include <ev-async-renderer.h>
  24 #include <ev-document-factory.h>
  25 #include <ev-backends-manager.h>
  26
  27 #include <gio/gio.h>
  28
  29 #include <stdlib.h>
  30 #include <string.h>
  31
  32 #define THUMBNAIL_SIZE 128
  33
  34 struct AsyncData {
  35         EvDocument  *document;
  36         const gchar *output;
  37         gint         size;
  38         gboolean     success;
  39 };
  40
  41 static EvDocument *
  42 evince_thumbnailer_get_document (const gchar *uri)
  43 {
  44         EvDocument *document = NULL;
  45         GError     *error = NULL;
  46
  47         document = ev_document_factory_get_document  (uri, &error);
  48         if (error) {
  49                 if (error->domain == EV_DOCUMENT_ERROR &&
  50                     error->code == EV_DOCUMENT_ERROR_ENCRYPTED) {
  51                         /* FIXME: Create a thumb for cryp docs */
  52                         g_error_free (error);
  53                         return NULL;
  54                 }
  55                 g_error_free (error);
  56                 return NULL;
  57         }
  58
  59         return document;
  60 }
  61
  62 static gboolean
  63 evince_thumbnail_pngenc_get (EvDocument *document, const char *thumbnail, int size)
  64 {
  65         EvRenderContext *rc;
  66         double width, height;
  67         GdkPixbuf *pixbuf;
  68         EvPage *page;
  69
  70         page = ev_document_get_page (document, 0);
  71
  72         ev_document_get_page_size (document, page, &width, &height);
  73
  74         rc = ev_render_context_new (page, 0, size / width);
  75         pixbuf = ev_document_thumbnails_get_thumbnail (EV_DOCUMENT_THUMBNAILS (document),
  76                                                        rc, FALSE);
  77         g_object_unref (rc);
  78         g_object_unref (page);
  79
  80         if (pixbuf != NULL) {
  81                 const char *overlaid_icon_name = NULL;
  82
  83                 if (overlaid_icon_name) {
  84                         GdkPixbuf *overlaid_pixbuf;
  85
  86                         gchar *overlaid_icon_path = g_strdup_printf ("%s/%s", DATADIR, overlaid_icon_name);
  87                         overlaid_pixbuf = gdk_pixbuf_new_from_file (overlaid_icon_path, NULL);
  88                         g_free (overlaid_icon_path);
  89                         if (overlaid_pixbuf != NULL) {
  90                                 int delta_height, delta_width;
  91
  92                                 delta_width = gdk_pixbuf_get_width (pixbuf) -
  93                                         gdk_pixbuf_get_width (overlaid_pixbuf);
  94                                 delta_height = gdk_pixbuf_get_height (pixbuf) -
  95                                         gdk_pixbuf_get_height (overlaid_pixbuf);
  96
  97                                 gdk_pixbuf_composite (overlaid_pixbuf, pixbuf,
  98                                                       delta_width, delta_height,
  99                                                       gdk_pixbuf_get_width (overlaid_pixbuf),
 100                                                       gdk_pixbuf_get_height (overlaid_pixbuf),
 101                                                       delta_width, delta_height,
 102                                                       1, 1,
 103                                                       GDK_INTERP_NEAREST, 100);
 104
 105                                 g_object_unref  (overlaid_pixbuf);
 106                         }
 107                 }
 108
 109                 if (gdk_pixbuf_save (pixbuf, thumbnail, "png", NULL, NULL)) {
 110                         g_object_unref  (pixbuf);
 111                         return TRUE;
 112                 }
 113
 114                 g_object_unref  (pixbuf);
 115         }
 116
 117         return FALSE;
 118 }
 119
 120 static gpointer
 121 evince_thumbnail_pngenc_get_async (struct AsyncData *data)
 122 {
 123         ev_document_doc_mutex_lock ();
 124         data->success = evince_thumbnail_pngenc_get (data->document,
 125                                                      data->output,
 126                                                      data->size);
 127         ev_document_doc_mutex_unlock ();
 128
 129         g_idle_add ((GSourceFunc)gtk_main_quit, NULL);
 130
 131         return NULL;
 132 }
 133
 134 int
 135 main (int argc, char *argv[])
 136 {
 137         EvDocument *document;
 138         const char *input;
 139         const char *output;
 140         int         size;
 141         char       *uri;
 142         GFile      *file;
 143
 144         if (argc <= 2 || argc > 5 || strcmp (argv[1], "-h") == 0 ||
 145             strcmp (argv[1], "--help") == 0) {
 146                 g_print ("Usage: %s [-s <size>] <input> <output>\n", argv[0]);
 147                 return -1;
 148         }
 149
 150         if (!strcmp (argv[1], "-s")) {
 151                 input = argv[3];
 152                 output = argv[4];
 153                 size = atoi (argv[2]);
 154         } else {
 155                 input = argv[1];
 156                 output = argv[2];
 157                 size = THUMBNAIL_SIZE;
 158         }
 159
 160         if (size < 40) {
 161                 g_print ("Size cannot be smaller than 40 pixels\n");
 162                 return -1;
 163         }
 164
 165         g_type_init ();
 166
 167         if (!g_thread_supported ())
 168                 g_thread_init (NULL);
 169
 170         ev_backends_manager_init ();
 171
 172         file = g_file_new_for_commandline_arg (input);
 173         uri = g_file_get_uri (file);
 174         document = evince_thumbnailer_get_document (uri);
 175
 176         g_object_unref (file);
 177         g_free (uri);
 178
 179         if (!document) {
 180                 ev_backends_manager_shutdown ();
 181                 return -2;
 182         }
 183
 184         if (!EV_IS_DOCUMENT_THUMBNAILS (document)) {
 185                 g_object_unref (document);
 186                 ev_backends_manager_shutdown ();
 187                 return -2;
 188         }
 189
 190         if (EV_IS_ASYNC_RENDERER (document)) {
 191                 struct AsyncData data;
 192
 193                 gtk_init (&argc, &argv);
 194
 195                 data.document = document;
 196                 data.output = output;
 197                 data.size = size;
 198
 199                 g_thread_create ((GThreadFunc) evince_thumbnail_pngenc_get_async,
 200                                  &data, FALSE, NULL);
 201
 202                 gtk_main ();
 203
 204                 g_object_unref (document);
 205                 ev_backends_manager_shutdown ();
 206
 207                 return data.success ? 0 : -2;
 208         }
 209
 210         if (!evince_thumbnail_pngenc_get (document, output, size)) {
 211                 g_object_unref (document);
 212                 ev_backends_manager_shutdown ();
 213                 return -2;
 214         }
 215
 216         g_object_unref (document);
 217         ev_backends_manager_shutdown ();
 218
 219         return 0;
 220 }