Someone on comp.lang.perl.tk wanted to know how to make a text, with a "mirror" of itself. Well I found a way with Imager, and it used so many commonly needed Imager methods, that it is actually a good general purpose demo of Imager capabilities. I post it for that purpose....a small script to illustrate alot of Imager's syntax. The Generic.tff font, can be any font you want, it is the path to the font file.

This code will take a quoted line of text as first commandline argument. It will then make an image of the text, crop it to size, mirror it, and combine it all into 1 file. 

#!/usr/bin/perl
use warnings;
use strict;
use Imager;


my $text = shift || 'Perlmonks Rule';

#make the xsize huge to accept alot of text 
#it will be cropped to text size later 
my $img = Imager->new(xsize=>900,ysize=>50,channels=>4);

my $blue = Imager::Color->new("#0000FF");
my $font = Imager::Font->new(
                file  => 'Generic.ttf', #path to any font file 
                color => $blue,
                size  => 40);

$img->string(font  => $font,
              text => $text,
             x     => 0,
             y     => 40,
             size  => 40,
             color => $blue,
             aa    => 1);

my ($neg_width, $global_descent, $pos_width, $global_ascent,
    $descent, $ascent) = $font->bounding_box(string => "$text");
print "$neg_width, $global_descent, $pos_width, $global_ascent,$descen
+t, $ascent\n";

my $img1 = $img->crop(left=>$neg_width, right=>$pos_width,
                      top=> -$global_descent, bottom=>$global_ascent +
+ 5); #fudge factor 

$img1->write(file=>$0.'.png', type=>'png')
           or die "Cannot write: ",$img1->errstr;

my $img_mirror = $img1->copy();
$img_mirror->flip( dir => "h" );

$img_mirror->write(file=>$0.'-mirror.png', type=>'png')
           or die "Cannot write: ",$img_mirror->errstr;

#make a unified image 
my $img_uni =  Imager->new(xsize=>$pos_width * 2,ysize=>$global_ascent
+,channels=>4);
$img_uni->paste(left=>$pos_width,top=>0,img=>$img1);
$img_uni->paste(left=>0,top=>0,img=>$img_mirror);

$img_uni->write(file=>$0.'-uni.png', type=>'png')
           or die "Cannot write: ",$img_uni->errstr;

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In reply to Mirrored text with Imager by zentara

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