Re: framebuffer -> texture

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Shankar N Swamy (shankar.n.swamy++at++boeing.com)
Wed, 16 Jun 1999 12:53:09 -0700

Ken Lindsay wrote:
>
> hi,
>
> is there a technique for using rendered framebuffer images as textures
> on other objects without copying back the data to main memory? i have
> RE2/MCO graphics with 4 RM boards. if RE2 can't do this, can IR/IR2?
>

pfTexture::subload( PFTEX_SOURCE_FRAMEBUFFER,
                    NULL /* for framebuffer */,
                    /* origin of the screen rectangle: */
                    int(sx0), int(sy0),
                    0 /* "srcwid" - 0 for framebuffer */,
                    0, 0 /* subload from the bottom left of the texture */,
                    int(xmax-xmin), int(ymax-ymin) )

The safest place to call this is probably the draw function callback.

Also look at the OpenGL call glCopyTexSubImage2D(...), if that's what
you need.

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                              Computer Graphics & VR Research
PHONE: (425) 865-4286 Mathematics & Computing Technology
FAX : (425) 865-2965 Phantom Works, Boeing
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