NAME Algorithm::Scale2x - Generic implementation of the Scale2x algorithm SYNOPSIS use Algorithm::Scale2x; # optionally exported # use Algorithm::Scale2x qw( scale2x scale3x ); # To start, you must grab a pixel plus all 8 surrounding pixels my @pixels = \$image->get_pixels( \$x, \$y ); # scale2x - returns a 2x2 grid of scaled pixels my @result2x = Algorithm::Scale2x::scale2x( @pixels ); # scale3x - returns a 3x3 grid of scaled pixels my @result3x = Algorithm::Scale2x::scale3x( @pixels ); DESCRIPTION This module provides a generic implementation of the Scale2x and Scale3x algorithms. Scale2x is described as: ...[a] real-time graphics effect able to increase the size of small bitmaps guessing the missing pixels without interpolating pixels and blurring the images. METHODS scale2x( @pixels ) Given a 3x3 grid of pixels (i.e color index numbers), it will expand the centre pixel into 4 new pixels (i.e. 2x scale). +---+---+---+ | 0 | 1 | 2 | +----+----+ +---+---+---+ | 4A | 4B | | 3 | 4 | 5 | => +----+----+ +---+---+---+ | 4C | 4D | | 6 | 7 | 8 | +----+----+ +---+---+---+ scale3x( @pixels ) Given a 3x3 grid of pixels (i.e color index numbers), it will expand the centre pixel into 9 new pixels (i.e. 3x scale). +---+---+---+ +----+----+----+ | 0 | 1 | 2 | | 4A | 4B | 4C | +---+---+---+ +----+----+----+ | 3 | 4 | 5 | => | 4D | 4E | 4F | +---+---+---+ +----+----+----+ | 6 | 7 | 8 | | 4G | 4H | 4I | +---+---+---+ +----+----+----+ SEE ALSO * http://scale2x.sourceforge.net/ * http://scale2x.sourceforge.net/algorithm.html AUTHOR Brian Cassidy COPYRIGHT AND LICENSE Copyright 2007-2009 by Brian Cassidy This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.