Patch from Lubomír Bláha applied. Polished comments and PngExportDialog.

slic3r.pl

@@ -43,6 +43,7 @@ my %cli_options = ();
         'gui-mode=s'            => \$opt{obsolete_ignore_this_option_gui_mode},
         'datadir=s'             => \$opt{datadir},
         'export-svg'            => \$opt{export_svg},
+        'export-png'            => \$opt{export_png},
         'merge|m'               => \$opt{merge},
         'repair'                => \$opt{repair},
         'cut=f'                 => \$opt{cut},
@@ -217,6 +218,8 @@ if (@ARGV) {  # slicing from command line
         
         if ($opt{export_svg}) {
             $sprint->export_svg;
+        } elsif ($opt{export_png}) {
+            $sprint->export_png;
         } else {
             my $t0 = [gettimeofday];
             # The following call may die if the output_filename_format template substitution fails,
@@ -282,6 +285,7 @@ Usage: slic3r.pl [ OPTIONS ] [ file.stl ] [ file2.stl ] ...
     --post-process      Generated G-code will be processed with the supplied script;
                         call this more than once to process through multiple scripts.
     --export-svg        Export a SVG file containing slices instead of G-code.
+    --export-png        Export zipped PNG files containing slices instead of G-code.
     -m, --merge         If multiple files are supplied, they will be composed into a single 
                         print rather than processed individually.