quakeforge/libs/video/renderer/sw32/d_zpoint.c

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/*
d_zpoint.c
software driver module for drawing z-buffered points
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
2001-09-28 06:26:31 +00:00
static const char rcsid[] =
"$Id$";
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "QF/sys.h"
#include "d_local.h"
void
D_DrawZPoint (void)
{
short *pz;
int izi;
pz = d_pzbuffer + (d_zwidth * r_zpointdesc.v) + r_zpointdesc.u;
izi = (int) (r_zpointdesc.zi * 0x8000);
if (*pz <= izi) {
*pz = izi;
switch(r_pixbytes)
{
case 1:
((byte *) d_viewbuffer) [d_scantable[r_zpointdesc.v] +
r_zpointdesc.u] = r_zpointdesc.color;
break;
case 2:
((short *) d_viewbuffer) [d_scantable[r_zpointdesc.v] +
r_zpointdesc.u] =
d_8to16table[r_zpointdesc.color];
break;
case 4:
((int *) d_viewbuffer) [d_scantable[r_zpointdesc.v] +
r_zpointdesc.u] =
d_8to24table[r_zpointdesc.color];
break;
default:
Sys_Error("D_DrawZPoint: unsupported r_pixbytes %i", r_pixbytes);
}
}
}