quakeforge/libs/video/renderer/sw/sw_graph.c

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/*
sw_graph.c
(description)
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
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
static __attribute__ ((used)) const char rcsid[] =
"$Id$";
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#include "QF/cvar.h"
#include "QF/draw.h"
#include "QF/render.h"
#include "r_local.h"
#include "r_cvar.h"
/*
R_LineGraph
Called by only R_DisplayTime
*/
void
R_LineGraph (int x, int y, int *h_vals, int count)
{
int h, i, s, color;
byte *dest;
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// FIXME: disable on no-buffer adapters, or put in the driver
s = r_graphheight->int_val;
while (count--) {
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dest = ((byte*)vid.buffer) + vid.rowbytes * y + x++;
h = *h_vals++;
if (h == 10000)
color = 0x6f; // yellow
else if (h == 9999)
color = 0x4f; // red
else if (h == 9998)
color = 0xd0; // blue
else
color = 0xff; // pink
if (h > s)
h = s;
for (i = 0; i < h; i++, dest -= vid.rowbytes) {
dest[0] = color;
}
}
}