what techniques would I need to use so that the image is generated before the HTML is displayed?

Make sure that the code for the image generation is run before the code that displays the HTML (and that it's not run in the background).

Sorry, but without more knwoledge of the structure of your code it's impossible to give more concrete instructions.

Perl 6 - links to (nearly) everything that is Perl 6.

In reply to Re^3: Broken image link when calling CGI from img tag by moritz
in thread Broken image link when calling CGI from img tag by lintunen

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