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

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/*
d_fill.c
clears a specified rectangle to the specified color
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__ ((unused)) const char rcsid[] =
"$Id$";
#include "QF/sys.h"
#include "d_iface.h"
void
D_FillRect (vrect_t *rect, int color)
{
switch (r_pixbytes)
{
case 1:
{
int rx, ry, rwidth, rheight;
byte *dest, pix;
pix = color;
rx = rect->x;
ry = rect->y;
rwidth = rect->width;
rheight = rect->height;
if (rx < 0) {
rwidth += rx;
rx = 0;
}
if (ry < 0) {
rheight += ry;
ry = 0;
}
if (rx + rwidth > vid.width)
rwidth = vid.width - rx;
if (ry + rheight > vid.height)
rheight = vid.height - rx;
if (rwidth < 1 || rheight < 1)
return;
dest = (byte *) vid.buffer + ry * vid.rowbytes + rx;
for (ry = 0; ry < rheight; ry++)
{
for (rx = 0; rx < rwidth; rx++)
dest[rx] = pix;
dest += vid.rowbytes;
}
}
break;
case 2:
{
int rx, ry, rwidth, rheight;
unsigned short *dest, pix;
pix = d_8to16table[color];
rx = rect->x;
ry = rect->y;
rwidth = rect->width;
rheight = rect->height;
if (rx < 0) {
rwidth += rx;
rx = 0;
}
if (ry < 0) {
rheight += ry;
ry = 0;
}
if (rx + rwidth > vid.width)
rwidth = vid.width - rx;
if (ry + rheight > vid.height)
rheight = vid.height - rx;
if (rwidth < 1 || rheight < 1)
return;
dest = (unsigned short *) vid.buffer + ry * (vid.rowbytes >> 1) +
rx;
for (ry = 0; ry < rheight; ry++)
{
for (rx = 0; rx < rwidth; rx++)
dest[rx] = pix;
dest += (vid.rowbytes >> 1);
}
}
break;
case 4:
{
int rx, ry, rwidth, rheight;
unsigned int *dest, pix;
pix = d_8to24table[color];
rx = rect->x;
ry = rect->y;
rwidth = rect->width;
rheight = rect->height;
if (rx < 0) {
rwidth += rx;
rx = 0;
}
if (ry < 0) {
rheight += ry;
ry = 0;
}
if (rx + rwidth > vid.width)
rwidth = vid.width - rx;
if (ry + rheight > vid.height)
rheight = vid.height - rx;
if (rwidth < 1 || rheight < 1)
return;
dest = (unsigned int *) vid.buffer + ry * (vid.rowbytes >> 2) + rx;
for (ry = 0; ry < rheight; ry++)
{
for (rx = 0; rx < rwidth; rx++)
dest[rx] = pix;
dest += (vid.rowbytes >> 2);
}
}
break;
default:
Sys_Error("D_FillRect: unsupported r_pixbytes %i", r_pixbytes);
}
}