[Coco] Viewing GIF files on a Coco

[Roger Taylor]

At 06:34 PM 9/27/2004, you wrote:


>On Sep 27, 2004, at 2:54 PM, David Gacke wrote:

>

>>Hi Fred,

>>

>>Yep, there's a GIF87 spec and a GIF89 spec.

>>

>>Maybe the viewer only supports the older types.

>

>Of course a properly written GIF 87a viewer will still try to show a GIF 

>89a image, merely ignoring the sections it doesn't recognize.  We also 

>know the difference between the way that things are supposed to be and 

>thew way they actually are.



A properly written modern viewer is supposed to ignore GIF89a packets it 
cannot process, but a properly-written old viewer that hasn't been updated 
correctly will usually refuse anything except a GIF87a.  I think 
Projector-3 just checks for the GIFxxx header and processes whatever it can 
regardless of the version ID.

--
Roger Taylor