[Adium-devl] Feb 1 is the Adium 1.0 release date

[Evan Schoenberg]

On Jan 26, 2007, at 8:28 PM, Ken Ferry wrote:

> Once NSImage has really loaded the data (which may be lazy), it's  
> just bytes in a certain configuration.  The original format has  
> been lost (unless I'm wrong, of course).
>
> However, if you can load it with NSImage, you can write it out in a  
> format of your choosing.  TIFFRepresentation will always write out  
> tiff data.
>
> So, you could take your data, load it up with NSImage, and write it  
> out as a tiff.

Good call, Ken.

Now I remember why I avoided that in the first place:  we have a  
series of bytes, which we know make an image.  We can write them to  
disk as-is, then have NSImage load it up when needed.  This retains  
whatever was sent.  If, on the other hand, we create an NSImage, then  
use a representation of it, we usually do just fine... but without  
turning to some third party library, we can't write out an animated  
GIF -- we'll lose the animation.

However, now that you bring up that technique, it becomes clear: It's  
easy enough to check if it's an animated GIF specifically (the number  
of frames will be > 1 - we already do a similar check when deciding  
whether to resize a buddy icon for sending it over the 'net, since we  
can't both resize and maintain animation)... so we could do the  
following:
1) Check for animated GIF.
2) If YES, write out the raw data with a .gif extension
3) If NO, write out [[NSImage imageWithData:data] TIFFRepresentation]  
as a .tiff file.  Alternately, PNGRepresentation as a .png file...  
better if we're going to be later loading that data and keeping it  
around, but I don't think we do so it really doesn't matter.

-Evan
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