Testing if an image is empty (blank)?

[MisterX]

Hi David

length(the imagedata of image x)=0
or
the filename of image x is empty

Also if you open any image and look at the hex/ascii data
you will see the similitudes of the headers. Im sure they
are documented...

cheers
Xavier

> -----Original Message-----
> From: use-revolution-bounces at lists.runrev.com 
> [mailto:use-revolution-bounces at lists.runrev.com] On Behalf Of 
> david bovill
> Sent: Tuesday, August 16, 2005 10:00
> To: How to use Revolution
> Subject: Testing if an image is empty (blank)?
> 
> How do I test to see if an image is empty?
> 
> The issue is that it is hard to filter the file dialog in 
> such a way that only images or videos are selectable cross 
> platform and then you have drag and drop... so I tried 
> testing after a drag and drop (which sets the filename 
> property) to see if the image has any data... so if you 
> choose a text file or pdf the filename property is set (which 
> is a pitty) and the imageData is not empy...
> 
> There is nothing that I now of like "file is an image"...
> 
> Any ideas of how to figure out after setting the filename of 
> an image whether it worked or not?
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