Using GD.pm

Baz has asked for the wisdom of the Perl Monks concerning the following question:

Hi im using GD to print out a png image, my printing code looks something like this -

print header(-type=>'image/png');
binmode STDOUT;
print $im->png;
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This works fine. Now i want to print 2 png images and some text too. Ive had no success though. To print text I added the following two lines just after calling the 3 lines above - but nothing prints out.

print header;
print "hello world";
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What am I doing wrong?? Im thinking that perhaps all this needs to be embedded in html code - so that i can direct where on the screne various stuff should be displayed.... Thanks.

Comment on Using GD.pm Select or Download Code

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Re: Using GD.pm by broquaint (Abbot) on May 05, 2002 at 17:06 UTC
This is a limitation of `HTTP` and not `GD`. The reason is that you can only output one type of content^[1] per request e.g either the content is an image or the content is text. An option here would be to have `<img>` tags whose `src` attribute points to a perl script that prints out the requested image. So your `content-type` will be `text/html`, while the images your perl script will output will be `image/png`. For more info on `HTTP` check out the `rfc`. HTH `_________ broquaint` ^[1] you can have multiple types of content (see. here), but that won't do what you expect.	[reply] [d/l]

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Re: Using GD.pm
by broquaint (Abbot) on May 05, 2002 at 17:06 UTC

HTTP

GD

^[1]

An option here would be to have <img> tags whose src attribute points to a perl script that prints out the requested image. So your content-type will be text/html, while the images your perl script will output will be image/png.

For more info on HTTP check out the rfc.
HTH

_________ broquaint

^[1] you can have multiple types of content (see. here), but that won't do what you expect.

[reply]
[d/l]