Re: printing with MFC/OpenGL

Hi,

In the If() part you are doing rendering for printer, but in the else
part you are
drawing on the screen, but I don't know why have you set the DrawBuffer to
GL_BACK in the else part. I think you have to set it to GL_FRONT then you will
see a different background color.

Varun.


On Sun, 27 Mar 2005 11:08:24 -0800, Rhadamés Carmona
<[email protected]> wrote:
> Hey Guys
> 
> The problem is only in print preview.... might be I am doing something
> wrong. It prints in the printer good.
> 
> Regards
> Rix
> 
> ----- Original Message -----
> To: "Multiple recipients of list OPENGL-GAMEDEV-L"
> <[email protected]>
> Sent: Sunday, March 27, 2005 1:58 PM
> 
> > Hi Guys
> >
> > I do not want to print with background color = black. Because of that, I
> > change background color (to white), in the last rendering for printing.
> >
> > OnDraw
> >
> >     if (pDC->IsPrinting())
> >    {
> >        glDrawBuffer(GL_BACK);
> >        glClearColor(1,1,1,1);
> >        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
> >        RenderScene();
> >        glFlush();
> >        glReadBuffer(GL_BACK);
> >        glReadPixels(0,0,vpWidth,vpHeight,GL_RGB, GL_UNSIGNED_BYTE,
> > buffer);
> >        //...
> >        // swapbuffers here
> >    }
> >    else
> >    {
> >        glDrawBuffer(GL_BACK);
> >        glClearColor(1,0,1,1);
> >        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
> >        //...
> >    }
> >
> >
> > I do not know, why the print preview  has black background... I have not
> > printed the image yet, but I think if the print preview has black
> > background, the printed image will.
> >
> > I am using CG fragment program for rendering.
> >
> > THX
> > Rix
> >
> > -----
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> >
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-- 
Author: Varun Bansal
  INET: [email protected]

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