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_thumbnails_get_thumbnail (EV_DOCUMENT_THUMBNAILS (document),
 141                                                        rc, FALSE);
 142         g_object_unref (rc);
 143         g_object_unref (page);
 144
 145         if (pixbuf != NULL) {
 146                 const char *overlaid_icon_name = NULL;
 147
 148                 if (overlaid_icon_name) {
 149                         GdkPixbuf *overlaid_pixbuf;
 150
 151 #ifdef G_OS_WIN32
 152                         gchar *dir = g_win32_get_package_installation_directory_of_module (NULL);
 153                         gchar *overlaid_icon_path = g_build_filename (dir, "share", "evince", overlaid_icon_name, NULL);
 154                         g_free (dir);
 155 #else
 156                         gchar *overlaid_icon_path = g_strdup_printf ("%s/%s", EVINCEDATADIR, overlaid_icon_name);
 157 #endif
 158                         overlaid_pixbuf = gdk_pixbuf_new_from_file (overlaid_icon_path, NULL);
 159                         g_free (overlaid_icon_path);
 160                         if (overlaid_pixbuf != NULL) {
 161                                 int delta_height, delta_width;
 162
 163                                 delta_width = gdk_pixbuf_get_width (pixbuf) -
 164                                         gdk_pixbuf_get_width (overlaid_pixbuf);
 165                                 delta_height = gdk_pixbuf_get_height (pixbuf) -
 166                                         gdk_pixbuf_get_height (overlaid_pixbuf);
 167
 168                                 gdk_pixbuf_composite (overlaid_pixbuf, pixbuf,
 169                                                       delta_width, delta_height,
 170                                                       gdk_pixbuf_get_width (overlaid_pixbuf),
 171                                                       gdk_pixbuf_get_height (overlaid_pixbuf),
 172                                                       delta_width, delta_height,
 173                                                       1, 1,
 174                                                       GDK_INTERP_NEAREST, 100);
 175
 176                                 g_object_unref  (overlaid_pixbuf);
 177                         }
 178                 }
 179
 180                 if (gdk_pixbuf_save (pixbuf, thumbnail, "png", NULL, NULL)) {
 181                         g_object_unref  (pixbuf);
 182                         return TRUE;
 183                 }
 184
 185                 g_object_unref  (pixbuf);
 186         }
 187
 188         return FALSE;
 189 }
 190
 191 static gpointer
 192 evince_thumbnail_pngenc_get_async (struct AsyncData *data)
 193 {
 194         ev_document_doc_mutex_lock ();
 195         data->success = evince_thumbnail_pngenc_get (data->document,
 196                                                      data->output,
 197                                                      data->size);
 198         ev_document_doc_mutex_unlock ();
 199
 200         g_idle_add ((GSourceFunc)gtk_main_quit, NULL);
 201
 202         return NULL;
 203 }
 204
 205 static void
 206 print_usage (GOptionContext *context)
 207 {
 208         gchar *help;
 209
 210         help = g_option_context_get_help (context, TRUE, NULL);
 211         g_print ("%s", help);
 212         g_free (help);
 213 }
 214
 215 int
 216 main (int argc, char *argv[])
 217 {
 218         EvDocument     *document;
 219         GOptionContext *context;
 220         const char     *input;
 221         const char     *output;
 222         GFile          *file;
 223         GError         *error = NULL;
 224
 225         context = g_option_context_new ("- GNOME Document Thumbnailer");
 226         g_option_context_add_main_entries (context, goption_options, NULL);
 227
 228         if (!g_option_context_parse (context, &argc, &argv, &error)) {
 229                 g_printerr ("%s\n", error->message);
 230                 g_error_free (error);
 231                 print_usage (context);
 232                 g_option_context_free (context);
 233
 234                 return -1;
 235         }
 236
 237         input = file_arguments ? file_arguments[0] : NULL;
 238         output = input ? file_arguments[1] : NULL;
 239         if (!input || !output) {
 240                 print_usage (context);
 241                 g_option_context_free (context);
 242
 243                 return -1;
 244         }
 245
 246         g_option_context_free (context);
 247
 248         if (size < 1) {
 249                 g_print ("Size cannot be smaller than 1 pixel\n");
 250                 return -1;
 251         }
 252
 253         input = file_arguments[0];
 254         output = file_arguments[1];
 255
 256         g_type_init ();
 257
 258         if (!g_thread_supported ())
 259                 g_thread_init (NULL);
 260
 261         if (!ev_init ())
 262                 return -1;
 263
 264         file = g_file_new_for_commandline_arg (input);
 265         document = evince_thumbnailer_get_document (file);
 266         g_object_unref (file);
 267
 268         if (!document) {
 269                 ev_shutdown ();
 270                 return -2;
 271         }
 272
 273         if (!EV_IS_DOCUMENT_THUMBNAILS (document)) {
 274                 g_object_unref (document);
 275                 ev_shutdown ();
 276                 return -2;
 277         }
 278
 279         if (EV_IS_ASYNC_RENDERER (document)) {
 280                 struct AsyncData data;
 281
 282                 gtk_init (&argc, &argv);
 283
 284                 data.document = document;
 285                 data.output = output;
 286                 data.size = size;
 287
 288                 g_thread_create ((GThreadFunc) evince_thumbnail_pngenc_get_async,
 289                                  &data, FALSE, NULL);
 290
 291                 gtk_main ();
 292
 293                 g_object_unref (document);
 294                 ev_shutdown ();
 295
 296                 return data.success ? 0 : -2;
 297         }
 298
 299         if (!evince_thumbnail_pngenc_get (document, output, size)) {
 300                 g_object_unref (document);
 301                 ev_shutdown ();
 302                 return -2;
 303         }
 304
 305         g_object_unref (document);
 306         ev_shutdown ();
 307
 308         return 0;
 309 }