DragonFly On-Line Manual Pages

Scale a .PNG image using the reference implementation of the Scale effects(1)
                                             DragonFly General Commands Manual

NAME
       scalerx - Scale a .PNG image using the reference implementation of the
       Scale effects

SYNOPSIS
       scalerx [-k N] [-w] [-r N] input.png output.png

DESCRIPTION
       Scale2x, Scale3x and Scale4x are real-time graphics effects able to
       increase the size of small bitmaps guessing the missing pixels without
       blurring the images.

       They were originally developed for the AdvanceMAME project in the year
       2001 to improve the quality of old games running at low video
       resolutions.

       The specification of the algorithm and more details are at:

           http://scale2x.sourceforge.net

       These command line tools read a .PNG file and write another image with
       the effects applied.

       The reference implementation of the Scale effects is used.

OPTIONS
       -k N, --scale N
              Select the scale factor. Available values are 2, 2x3, 2x4, 3,
              and 4.

       -w, --wrap
              Compute the image border for a wraparound effect.

       -r N   Select a specific revision of the effect.  The default is scaleX
              using algorithm 'x' or '1'.  To select the new scaleK use
              algorithm 'k' or '2'.  To scale an image without any effect use
              the value '0'.  Other nunbers are alternative versions.  Refers
              at the source implementation for more details.

COPYRIGHT
       This file is Copyright (C) 2003, 2004 Andrea Mazzoleni

 Scale a .PNG image using the reference implementation of the Scale effects(1)