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/*
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 the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// d_clear: clears a specified rectangle to the specified color
#include "quakedef.h"
/*
================
D_FillRect
================
*/
void D_FillRect (vrect_t *rect, int color)
{
int rx, ry, rwidth, rheight;
unsigned char *dest;
unsigned *ldest;
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);
if (((rwidth & 0x03) == 0) && (((long)dest & 0x03) == 0))
{
// faster aligned dword clear
ldest = (unsigned *)dest;
color += color << 16;
rwidth >>= 2;
color += color << 8;
for (ry=0 ; ry<rheight ; ry++)
{
for (rx=0 ; rx<rwidth ; rx++)
ldest[rx] = color;
ldest = (unsigned *)((byte*)ldest + vid.rowbytes);
}
}
else
{
// slower byte-by-byte clear for unaligned cases
for (ry=0 ; ry<rheight ; ry++)
{
for (rx=0 ; rx<rwidth ; rx++)
dest[rx] = color;
dest += vid.rowbytes;
}
}
}
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