Hi:

I am trying to create a PDF document using API2. I need to include a png image that I create using GD::Graphs. When I try to read in the the image I get the following error:

substr outside of string at /usr/lib/perl5/site_perl/5.8.3/PDF/API2/PDF/ImagePNG.pm line 137.

I am running on RedHat 9. I am using Perl v5.8.3, GD v1.53, and API2 v0.3r77...these should all be the latest available revisions from CPAN. The png file I create can be read in through various Linux and Windoz utilities, so I am fairly sure the file is for the most part valid.

If anyone has experienced this problem, I would appreciate any advice you might have. Also, if anyone has any links to good tutorials on GD, GD::Graph, and/or API2, this will help me out a lot. It is not always easy to see how all the pieces fit together by looking at the pod.

TIA,

John

P.S. -- below is a stripped down version of what I am trying to accomplish...thanks!

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#!/usr/bin/perl -w 
use strict; 
use GD::Graph::bars; 
use PDF::API2; 
createGraph(); 
createPdf(); 
exit; 

sub createGraph { 
  my @xLabels = qw( Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec );
+ 
  my @data2002 = qw( 17 19 26 38 56 64 67 53 40 29 21 13 ); 
  my @data2003 = qw( 19 24 27 41 56 69 75 60 44 33 22 15 ); 
  my @data = ( \@xLabels, \@data2002, \@data2003 ); 
  my $graph = GD::Graph::bars->new( 800, 600 ); 
  $graph->set( title => "Rainfall 2002/2003", y_label => "Millimetres"
+ ); 
  my $image = $graph->plot( \@data ) or die( "Cannot create image" ); 
  open OUT, ">demo.png"; 
  binmode OUT; 
  print OUT $image->png(); 
  close OUT; 
} 

sub createPdf { 
  my $hPdf = PDF::API2->new(-file => "demo.pdf"); 
  my $hPage = $hPdf->page(); 
  my $hGfx = $hPage->gfx(); 
  $hPage->mediabox(300, 300); 
  my $hImg = $hPdf->image('demo.png'); 
  $hGfx->image($hImg, 0, 0); 
  print $hPdf->stringify(); 
  $hPdf->end; 
}

[download]
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20040510 Edit by Corion: Changed formatting of code to use CODE tags
Edit by castaway, added readmore tags

In reply to Problem using PNG images created by GD::Graphs in an API2 PDF doc by jmo0099

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