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From: George_Bain@Playstation.sony.com
Newsgroups: scea.yaroze.programming.2d_graphics
Subject: Re: high-res?
Date: 9 Mar 1998 08:45:04 -0000
Organization: Sony Computer Entertainment Europe - 119.SS5
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From: George_Bain@Playstation.sony.com
To: news@playstation.co.uk



>
> If you set the 'dfe' field of your DRAWENV structure to 1, that will
> allow the GPU to draw into the scanlines currently being displayed.  So
> both the odd-numbered scanlines and the even-numbered scanlines will be
> drawn, regardless of which are currently being shown.  So when it comes
> time to switch from one set of scanlines to another, if you haven't
> finished creating the next game screen, then all that happens is that
> the viewer will see both sets of scanlines for the current game screen,
> instead of only one set.  You'll still get your high-res display, just
> with a slower frame rate.
>
> The disadvantage to setting the 'dfe' field is that since the
> PlayStation is drawing into both sets of scanlines, the drawing
> operation takes longer.  In some cases, it may then take longer than
> 1/60th second to complete, which would make running at 60 fps
> impossible.  If this is the case, setting the 'dfe' field to 1 should be
> done only when you know you're not going to be running at 60 fps anyway.
>
> Mike Fulton @ SCEA
DB db;
DB *cdb;

void InitGame( void )
  {

    SetDefDrawEnv(&db[0].draw, 0, 0, 640, 512);
    SetDefDispEnv(&db[0].disp, 0, 0, 640, 512);

    setRECT(&db[0].disp.screen, 0, 18, 0, 256);
    db->draw.dfe = 0;
    db->draw.isbg = 1;

  }// end InitGame

int main( void )
  {

     InitGame();

     while(  !game_over )
        {

     cdb = &db[0];

     ClearOTag(cdb->ot, OTSIZE);

     // add primitives here



     DrawSync(0);

     VSync(0);

     PutDispEnv(&cdb->disp);
     PutDrawEnv(&cdb->draw);

     DrawOTag(cdb->ot);

        }// end while

      return(0);

   }// end main

Hi there,

This is a sample snip, it obviously isn't fully complete but should give
you the idea.
Note what Mike Fulton wrote above.

Regards,

George@SCEE



Hi!!!
I am looking for a PAL mode HI-RES sample. My problem is that setting
the resolution in PAL mode 640 x 512 does not work. (640 x 480 works
fine)
Thanx.