background texture using glDrawPixels

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From: Yoram Shahak (yoram++at++dreamteam-ltd.com)
Date: 10/11/2000 07:18:54

Hi,

I am trying to implement background texturing using glDrawPixels in my
draw call back.
my code looks something like this :

void drawCallBack(pfChannel *chan, void *data)
{
    preDraw(chan, data);
    pfDraw();
}

void preDraw()
{
     chan->clear();
    glClearStencil(0x0);
    glClear(GL_STENCIL_BUFFER_BIT);

    pfVec3 farPlaneLL, dummy;
    chan->getFar(farPlaneLL, dummy, dummy, dummy);

    glRasterPos3f(farPlaneLL[0], farPlaeLL[1], farPlaneLL[2]);
    glDrawPixels(winWidth, winHeight, imageFormat,GL_UNSIGNED_INT,
imageBuffer);

}

As a result I get the background image flickering if at all seen.
Does performer clear the gl buffer in pfDraw ?
Am I going totally the wrong way about implementing this ?

Please help .
Thanx.

:o)

Yoram Shahak
DreamTeam ltd.

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