[Fluxus] texture types (was Re: png diagonal oddness)

[gabor papp]

> Quickly:
>
> - non power of 2 (NPOT) textures are available through an ARB extension
> which is not supported by ATI/AMD
>
> - there may be a performance hit if you use NPOT textures
>
>
> Don't! :)
that's unfortunate. although according to the opengl wiki 
(http://www.opengl.org/wiki/NPOT_Texture), opengl 2.0 requires npot 
textures, and all newer hardware can handle them perfectly.

pot textures are really cumbersome sometimes, for storing video images 
for example. what do you think about arb_texture_rectangle? it also has 
some difficulties, for example the non normalized texture coordinates. 
what's more, now additional fluxus modules just return opengl texture 
handles, because we use texture_2d only. rectangle textures have to be 
handled differently, so it would be required that we pass the texture 
type also, which would need the rewrite of the texture handling of fluxus.

best,
gabor