RE: [GD-Windows] Image formats (was Algorithms Scrolling starfiel d)

[Andrew G. <ag...@cl...>]

That's an interesting point, I don't know much about PSD but being able to
specify more than 4 channels would be quite attractive.

What sort of experiences have you had working with them? Is it a fairly
static format or something that tends to change significantly with photoshop
versions?


Andrew Grant-
Climax Brighton 



> -----Original Message-----
> From: Phil Teschner [mailto:ph...@mi...]
> Sent: 31 July 2002 17:22
> To: bri...@py...; gam...@li...
> Subject: RE: [GD-Windows] Image formats (was [Algorithms] Scrolling
> starfield)
> 
> 
> If this is really a stumbling block then you can always write support
> for PSD files.  They are actually pretty easy to use since 
> the flattened
> image is stored at the end of the file in separate color channels
> (r,g,b,a,...).
> 
> This actually let's you do interesting things like allowing 
> the artists
> to create images with more than 4 channels that you then split into
> multiple textures yourself (for example when you need a gloss map in
> addition to all the other color information).
> 
> Plus the artists will like you that much more since they don't need to
> juggle around two file formats.
> 
> Phil
> 
> -----Original Message-----
> From: brian hook [mailto:bri...@py...] 
> Sent: Wednesday, July 31, 2002 8:11 AM
> To: gam...@li...
> Subject: Re: [GD-Windows] Image formats (was [Algorithms] Scrolling
> starfield)
> 
> > What formats are people using for images these days? We're 
> currently 
> using
> > TGA which "suffices" but isn't great due to Adobe less than 
> embracing 
> the
> > concept of alpha channels.
> 
> Photoshop 7 completely and utterly broke TGA support, but you can 
> supposedly go back and get the TGA exporter from PS6 and copy 
> up to PS7 
> and it starts working again.
> 
> This is OT, but damn, Adobe has the most piss poor attitude I've ever 
> seen.  When this TGA screwup was brought to their attention, their 
> response was three fold:
> 
> - testers should have pointed it out to them, hence it's not 
> their fault
> 
> - no one mentioned that alpha was being used "that way" (for games)
> 
> - using alpha channel "that way" is clearly against the spec, 
> and game 
> developers are relying on "broken" behaviour (i.e. TGA 
> support in PS up 
> through PS6), so it's really their fault
> 
> That, coupled with the completely broken PNG support in 
> Photoshop, has 
> just made me really dislike Adobe.
> 
> Anyway, we use TGA, JPG and PNG.  TGA if we need alpha or 16-bit; JPG 
> if we need lots of compression; and PNG if we need the files to be 
> compressed individually.
> 
> -Hook
> 
> 
> 
> 
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