Re: [AD] SF.net SVN: alleg:[11937] allegro/branches/4.9/allegro.cfg

[Milan Mimica <milan.mimica@xxxxxxxxxx>]

Elias Pschernig wrote:
> Can you be somewhat more specific? Reading the source I assume setting 
> it to "old" is the same as disabling the "WGL_ARB_pixel_format" 
> extension - is that right?

No. WGL does not use extension mechanism at that phase because it hasn't been 
initialized yet, so disabling an extension won't have any affect.
Using "old" makes use of DescribePixelFormat(), while using "new" makes use of 
wglGetPixelFormatAttribivARB() provided by WGL_ARB_pixel_format extension. The 
two functions do the same, but are a bit different and WGL_ARB_pixel_format 
let's you extract some more info, similar to XVisual/FBoonfig story.

> The documentation in allegro.cfg should not just make sense to us, but 
> also to users - and for them saying that something is "new" or "old" is 
> meaningless.

This feature is not really intended to for users. It's mainly for testing 
purposes. We probably shouldn't even list in allegro.cfg when A5 is out, or mark 
it as strictly advanced. The "new" way wasn't working on WINE, I don't know if 
that's still the case.



--
Milan Mimica
http://sparklet.sf.net