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Daniel Muey > GD-Image-Thumbnail-0.02 > GD::Image::Thumbnail



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GD::Image::Thumbnail - Perl extension for creating thumbnailed images with GD.


    use GD::Image::Thumbnail;
    my $img = GD::Image->new(100,20);

    my $thm = $img->thumbnail; # same as { factor => 0.20 }
    my $thm = $img->thumbnail($n); # same as { side => $n }

    my $thm = $img->thumbnail({ factor => 0.25 });
    my $thm = $img->thumbnail({ factor => 0.25, small => 1 });

    my $thm = $img->thumbnail({ side => $n });
    my $thm = $img->thumbnail({ side => $n, small => 1 });

    my $thm = $img->thumbnail({ w => $w });
    my $thm = $img->thumbnail({ h => $h });
    my $thm = $img->thumbnail({ w => $w, h => $h });

    my $thm = $img->thumbnail({ w => $w, small => 1 });
    my $thm = $img->thumbnail({ h => $h, small => 1 });
    my $thm = $img->thumbnail({ w => $w, h => $h, small => 1 });

thumb() ^

thumb() is shortcut for thumbnail() - useful for people who like to bite their nails :)




are doing the same thing


factor => $n

This makes a thumbnail $n (0.20 by default) times the size of the original. Only a two decimal place number between 0 and 1 are allowed. If a factor is given side, h, and w are all ignored

side => $n

Makes the side that will result in a larger thumbnail $n pixels (or opposite if small => 1). If side is given then h and w are ignored.

w => $x and h => $y

You can specify one or both of these. If only one is given it makes that side that dimention. If you specify both, the side that will result in a larger thumbnail (based on the image's orientation and *not* the values of w and h if different), is used (or opposite if small => 1).

small => 1

If true make the images the smallest possible. This will round down instead of up when rounding is necessary and will help decide which side gets set to the given value.

   $img->thumbnail(10); # 100 x 25 image becomes 40 x 10
   $img->thumbnail({ side => 10, small => 1}); # 100 x 25 image becomes 10 x 2

resample => 1

If true use copyResampled() instead of copyResized() See GD's documentation about the difference. This can also be turned on by specifying a true value as the second argument:

   $img->thumbnail($n, 1);
   $img->thumbnail({ factor => $n }, 1);


If called in scalar context it return the new GD::Image object that is the thumbnail (IE the original object is not modified)

    my $thm = $img->thumb;

If called in array context it returns an array which is the new object, the width , and height of the new image in that object.

    my($thm,$thm_w,$thm_h) = $img->thumb;


I'd like to add functionality to modify the original image object if called in void context:





Daniel Muey,


Copyright 2005 by Daniel Muey

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

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