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List:       kde-kimageshop
Subject:    Re: Image manipulation using glsl
From:       Tom Burdick <tburdi1 () uic ! edu>
Date:       2007-01-22 16:03:49
Message-ID: 200701220959.16208.tburdi1 () uic ! edu
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When I tried using npot textures on my 6600 it did everything in software. I 
think only the 7xxx and 8xxx series cards support npot natively.

You could always render the repeats yourself no? Especially if you don't need 
that many of them.

-Tom

On Sunday 21 January 2007 23:55, Michael Thaler wrote:
> Hi,
>
> > Thats the extension yes.
>
> Unfortunately ARB_texture_rectangle only supports GL_CLAMP,
> GL_CLAMP_TO_EDGE, and GL_CLAMP_TO_BORDER wrap modes. GL_REPEAT and
> GL_MIRRORED_REPEAT, which are quite useful for convolution filters, are
> only supported by power-of-two sized textures.
>
> I think OpenGL 2.0 actually supports non-power-of-two sized textures. If I
> change the wrap mode from GL_REPEAT to GL_CLAMP the program works fine with
> NPOTS textures. With GL_REPEAT the program falls back to software rendering
> when I load a NPOTS texture with my ATI card. Maybe NVidia supports NPOTS
> textures with GL_REPEAT or GL_MIRRORED_REPEAT? (I really wish I would have
> bought an NVidia card, but back then I didn't know that the AIT drivers
> were much worse than the NVidia ones...)
>
> Greetings,
> Michael
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