RE: drawing to a buffer

From: Miguel Lozano (miguel++at++glup.irobot.uv.es)
Date: 03/20/2000 04:30:20

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Hi -

How does one use Performer to draw an image to a buffer that
is not the framebuffer? I want to draw an image and then
later use it as a texture map...

Any suggestions or examples would be greatly appreciated.

----
Hi Ken,
 what I did once for avoiding some projection distortion was
to read from the Frame buffer directly into a texture object. This is
possible
adding a 'subload texture instruction' in your draw call-back routine:
static void
 DrawChannel( ....) // Draw Call-Back routine
{
  ....
  pfDraw();
  ....
 if(CAPTURA_FBUFFER) // getting from the FBuffer
     Shared->DistTexture[0]->subload(PFTEX_SOURCE_FRAMEBUFFER, NULL,
ORIGEN_TEXT0, 	0, 0, PCHAN_OX, PCHAN_OY, PCHAN_X, PCHAN_Y);
 }
  I hope, this helps you.
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 Lozano Ibáñez, Miguel
  Instituto de Robótica
  Universitat de València
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