pbuffer example & glCopyTexSubImage2D

From: Jason Coposky (jasonc++at++elumens.com)
Date: 03/15/2001 09:56:59

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quick question,

        i have modified the pbuffer.c example to use a glCopyTexSubImage2D
        in the hope of using a texture drawn to a pbuffer. at first i just
        replaced the glCopyPixels in the DrawCopy callback with a
        glCopyTexSubImage2D, after calling pfApplyTex on a pfTexture, which
        worked fine, except that the copy is from the "draw" drawable, not
the
        "read/pbuffer" drawable. ive tried everything short of using
straight
        opengl textures and trying to sneak around performer, which i feel
would
        be a Bad Thing(tm), to get this to work. this is prob. my 10th
attempt,
        but the most straight forward. so much for the quick fix. :)

        the question is: what sort of magic is necessary to read a texture
from
        a window which does not use the scene that texture is bound to? ie.
        a pbuffer window.

        thanks

        ~J

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Jason M. Coposky, 3D Software Engineer
jasonc++at++elumens.com
// =-=-=-=-=-=-=-=-=-=

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