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
  69         ev_document_get_page_size (document, 0, &width, &height);
  70
  71         rc = ev_render_context_new (0, 0, size / width);
  72         pixbuf = ev_document_thumbnails_get_thumbnail (EV_DOCUMENT_THUMBNAILS (document),
  73                                                        rc, FALSE);
  74         g_object_unref (rc);
  75
  76         if (pixbuf != NULL) {
  77                 const char *overlaid_icon_name = NULL;
  78
  79                 if (overlaid_icon_name) {
  80                         GdkPixbuf *overlaid_pixbuf;
  81
  82                         gchar *overlaid_icon_path = g_strdup_printf ("%s/%s", DATADIR, overlaid_icon_name);
  83                         overlaid_pixbuf = gdk_pixbuf_new_from_file (overlaid_icon_path, NULL);
  84                         g_free (overlaid_icon_path);
  85                         if (overlaid_pixbuf != NULL) {
  86                                 int delta_height, delta_width;
  87
  88                                 delta_width = gdk_pixbuf_get_width (pixbuf) -
  89                                         gdk_pixbuf_get_width (overlaid_pixbuf);
  90                                 delta_height = gdk_pixbuf_get_height (pixbuf) -
  91                                         gdk_pixbuf_get_height (overlaid_pixbuf);
  92
  93                                 gdk_pixbuf_composite (overlaid_pixbuf, pixbuf,
  94                                                       delta_width, delta_height,
  95                                                       gdk_pixbuf_get_width (overlaid_pixbuf),
  96                                                       gdk_pixbuf_get_height (overlaid_pixbuf),
  97                                                       delta_width, delta_height,
  98                                                       1, 1,
  99                                                       GDK_INTERP_NEAREST, 100);
 100
 101                                 g_object_unref  (overlaid_pixbuf);
 102                         }
 103                 }
 104
 105                 if (gdk_pixbuf_save (pixbuf, thumbnail, "png", NULL, NULL)) {
 106                         g_object_unref  (pixbuf);
 107                         return TRUE;
 108                 }
 109
 110                 g_object_unref  (pixbuf);
 111         }
 112
 113         return FALSE;
 114 }
 115
 116 static gpointer
 117 evince_thumbnail_pngenc_get_async (struct AsyncData *data)
 118 {
 119         ev_document_doc_mutex_lock ();
 120         data->success = evince_thumbnail_pngenc_get (data->document,
 121                                                      data->output,
 122                                                      data->size);
 123         ev_document_doc_mutex_unlock ();
 124
 125         g_idle_add ((GSourceFunc)gtk_main_quit, NULL);
 126
 127         return NULL;
 128 }
 129
 130 int
 131 main (int argc, char *argv[])
 132 {
 133         EvDocument *document;
 134         const char *input;
 135         const char *output;
 136         int         size;
 137         char       *uri;
 138         GFile      *file;
 139
 140         if (argc <= 2 || argc > 5 || strcmp (argv[1], "-h") == 0 ||
 141             strcmp (argv[1], "--help") == 0) {
 142                 g_print ("Usage: %s [-s <size>] <input> <output>\n", argv[0]);
 143                 return -1;
 144         }
 145
 146         if (!strcmp (argv[1], "-s")) {
 147                 input = argv[3];
 148                 output = argv[4];
 149                 size = atoi (argv[2]);
 150         } else {
 151                 input = argv[1];
 152                 output = argv[2];
 153                 size = THUMBNAIL_SIZE;
 154         }
 155
 156         if (size < 40) {
 157                 g_print ("Size cannot be smaller than 40 pixels\n");
 158                 return -1;
 159         }
 160
 161         g_type_init ();
 162
 163         if (!g_thread_supported ())
 164                 g_thread_init (NULL);
 165
 166         ev_backends_manager_init ();
 167
 168         file = g_file_new_for_commandline_arg (input);
 169         uri = g_file_get_uri (file);
 170         document = evince_thumbnailer_get_document (uri);
 171
 172         g_object_unref (file);
 173         g_free (uri);
 174
 175         if (!document) {
 176                 ev_backends_manager_shutdown ();
 177                 return -2;
 178         }
 179
 180         if (!EV_IS_DOCUMENT_THUMBNAILS (document)) {
 181                 g_object_unref (document);
 182                 ev_backends_manager_shutdown ();
 183                 return -2;
 184         }
 185
 186         if (EV_IS_ASYNC_RENDERER (document)) {
 187                 struct AsyncData data;
 188
 189                 gtk_init (&argc, &argv);
 190
 191                 data.document = document;
 192                 data.output = output;
 193                 data.size = size;
 194
 195                 g_thread_create ((GThreadFunc) evince_thumbnail_pngenc_get_async,
 196                                  &data, FALSE, NULL);
 197
 198                 gtk_main ();
 199
 200                 g_object_unref (document);
 201                 ev_backends_manager_shutdown ();
 202
 203                 return data.success ? 0 : -2;
 204         }
 205
 206         if (!evince_thumbnail_pngenc_get (document, output, size)) {
 207                 g_object_unref (document);
 208                 ev_backends_manager_shutdown ();
 209                 return -2;
 210         }
 211
 212         g_object_unref (document);
 213         ev_backends_manager_shutdown ();
 214
 215         return 0;
 216 }