NAME
GD::Image::Scale2x - Implementation of the Scale2x algorithm for the GD
library
SYNOPSIS
use GD;
use GD::Image::Scale2x;
# load an image
my $image = GD::Image->new( 'file.png' );
# scale2x, 3x, and 4x
my $scaled2x = $image->scale2x;
my $scaled3x = $image->scale3x;
my $scaled4x = $image->scale4x;
# scale a certain area
# (10, 10) to (30, 30)
my $scaled = $image->scale2x( 10, 10, 20, 20 );
DESCRIPTION
This module implements the Scale2x algorithm (as well as 3x and 4x).
From the Scale2x web site:
Scale2x is real-time graphics effect able to increase the size of small bitmaps
guessing the missing pixels without interpolating pixels and blurring the images.
The algorithm itself is explained at
http://scale2x.sourceforge.net/algorithm.html. You can see some example
results by looking through the test directory.
METHODS
scale2x( [ $source_x, $source_y, $width, $height ] )
Takes an image and produces one twice a big. From the Scale2x web site:
The effect works repeating a computation pattern for every pixel of the
original image. The pattern starts from a square of 9 pixels and expands
the central pixel computing 4 new pixels.
You can specify a portion of the original image by specifying a source x
and y plus a width and height.
scale3x( [ $source_x, $source_y, $width, $height ] )
A similar algorithm to scale2x, except that it produces a 9-pixel
result.
scale4x( [ $source_x, $source_y, $width, $height ] )
Same as scale2x done twice over.
SEE ALSO
* Algorithm::Scale2x
* GD
*
http://scale2x.sourceforge.net/
AUTHOR
Brian Cassidy <
[email protected]>
COPYRIGHT AND LICENSE
Copyright 2005-2009 by Brian Cassidy
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
