Re: Generating textures on the fly

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Ran Yakir (rany++at++rtset.co.il)
Wed, 25 Jun 1997 20:09:14 +0000

On Jun 25, 5:47pm, Amaury Aubel wrote:
>
> I was not aware there was such a thing as pbuffers.
> But how could I load something from the pbuffer into the TRAM? That puzzles
me
> most...
>
> I could use glXMakeCurrentReadSGI to tell openGL to use the pbuffer as a
source
> for all subsequent glReadPixels, glCopyPixels etc.
> But I strongly doubt this will apply to a texture load specified as follows:
>
> pfTexLoadMode(tex, PFTEX_LOAD_SOURCE, PFTEX_SOURCE_FRAMEBUFFER);
> pfTexLoadSize(tex, WIN_X, WIN_Y);
> pfLoadTex(movie->tex);
>
> Does anyone have an idea of what would happen?
>

This is exactly the way to do it. glXMakeCurrentReadSGI does apply for
glCopyTexImage2DEXT and glCopyTexSubImage2DEXT, which are encapsulated by
pfLoadTex of SOURCE_FRAMEBUFFER textures.

Ran

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