Getting the required GD Memmory Usage.

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Hi All,

I have a site that loads images with the built in GD functions. Most of
the images are small and load fine however there are a few images that
are large and when trying to load them causes php to exit with the
unable to allocate memory message. I was wondering if anybody knows of a
way to look at a file (in this case a JPEG) and then calculate the
memory requirements required for GD to load it.

I know that i can just set the memory limit value to a higher value but
i don't want to load these large images anyway so if i could work out
the GD memory requirement without having to load the image it would be
most useful.

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Regards,
William Bailey.
Pro-Net Internet Services Ltd.
http://www.pro-net.co.uk/
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