/**
* Run geotagging process in a separate thread
*/
static int trw_layer_geotag_thread ( geotag_options_t *options, gpointer threaddata )
{
guint total = g_list_length(options->files), done = 0;
// TODO decide how to report any issues to the user ...
// Foreach file attempt to geotag it
while ( options->files ) {
options->image = (gchar *) ( options->files->data );
trw_layer_geotag_process ( options );
options->files = options->files->next;
// Update thread progress and detect stop requests
int result = a_background_thread_progress ( threaddata, ((gdouble) ++done) / total );
if ( result != 0 )
return -1; /* Abort thread */
}
if ( options->redraw ) {
if ( IS_VIK_LAYER(options->vtl) ) {
// Ensure any new images get shown
trw_layer_verify_thumbnails ( options->vtl, NULL ); // NB second parameter not used ATM
// Force redraw as verify only redraws if there are new thumbnails (they may already exist)
vik_layer_emit_update ( VIK_LAYER(options->vtl), TRUE ); // Update from background
}
}
return 0;
}
/*
* Function for starting the DEM file loading as a background thread
*/
static int dem_layer_load_list_thread ( dem_load_thread_data *dltd, gpointer threaddata )
{
int result = 0; // Default to good
// Actual Load
if ( a_dems_load_list ( &(dltd->vdl->files), threaddata ) ) {
// Thread cancelled
result = -1;
}
// ATM as each file is processed the screen is not updated (no mechanism exposed to a_dems_load_list)
// Thus force draw only at the end, as loading is complete/aborted
//gdk_threads_enter();
// Test is helpful to prevent Gtk-CRITICAL warnings if the program is exitted whilst loading
if ( IS_VIK_LAYER(dltd->vdl) )
vik_layer_emit_update ( VIK_LAYER(dltd->vdl) ); // NB update from background thread
//gdk_threads_leave();
return result;
}
/**
* Correlate the image to any track within the TrackWaypoint layer
*/
static void trw_layer_geotag_process ( geotag_options_t *options )
{
if ( !options->vtl || !IS_VIK_LAYER(options->vtl) )
return;
if ( !options->image )
return;
gboolean has_gps_exif = FALSE;
gchar* datetime = a_geotag_get_exif_date_from_file ( options->image, &has_gps_exif );
if ( datetime ) {
// If image already has gps info - don't attempt to change it.
if ( !options->ov.overwrite_gps_exif && has_gps_exif ) {
if ( options->ov.create_waypoints ) {
// Create waypoint with file information
gchar *name = NULL;
VikWaypoint *wp = a_geotag_create_waypoint_from_file ( options->image, vik_trw_layer_get_coord_mode (options->vtl), &name );
if ( !name )
name = g_strdup ( a_file_basename ( options->image ) );
vik_trw_layer_filein_add_waypoint ( options->vtl, name, wp );
g_free ( name );
// Mark for redraw
options->redraw = TRUE;
}
g_free ( datetime );
return;
}
options->PhotoTime = ConvertToUnixTime ( datetime, EXIF_DATE_FORMAT, options->ov.TimeZoneHours, options->ov.TimeZoneMins);
g_free ( datetime );
// Apply any offset
options->PhotoTime = options->PhotoTime + options->ov.time_offset;
options->found_match = FALSE;
if ( options->track ) {
// Single specified track
// NB Doesn't care about track name
trw_layer_geotag_track ( NULL, options->track, options );
}
else {
// Try all tracks
GHashTable *tracks = vik_trw_layer_get_tracks ( options->vtl );
if ( g_hash_table_size (tracks) > 0 ) {
g_hash_table_foreach ( tracks, (GHFunc) trw_layer_geotag_track, options );
}
}
// Match found ?
if ( options->found_match ) {
if ( options->ov.create_waypoints ) {
// Create waypoint with found position
gchar *name = NULL;
VikWaypoint *wp = a_geotag_create_waypoint_positioned ( options->image, options->coord, options->altitude, &name );
if ( !name )
name = g_strdup ( a_file_basename ( options->image ) );
vik_trw_layer_filein_add_waypoint ( options->vtl, name, wp );
g_free ( name );
// Mark for redraw
options->redraw = TRUE;
}
// Write EXIF if specified
if ( options->ov.write_exif ) {
a_geotag_write_exif_gps ( options->image, options->coord, options->altitude, options->ov.no_change_mtime );
}
}
}
}
