mirror of
https://git.code.sf.net/p/quake/quakeforge
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85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
/*
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d_fill.c
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clears a specified rectangle to the specified color
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "d_iface.h"
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#include "r_internal.h"
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void
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D_FillRect (vrect_t *rect, int color)
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{
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unsigned int rx, ry, rwidth, rheight;
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unsigned char *dest;
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unsigned int *ldest;
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rx = rect->x;
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ry = rect->y;
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rwidth = rect->width;
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rheight = rect->height;
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if (rx < 0) {
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rwidth += rx;
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rx = 0;
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}
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if (ry < 0) {
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rheight += ry;
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ry = 0;
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}
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if (rx + rwidth > vid.width)
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rwidth = vid.width - rx;
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if (ry + rheight > vid.height)
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rheight = vid.height - rx;
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if (rwidth < 1 || rheight < 1)
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return;
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dest = ((byte *) vid.buffer + ry * vid.rowbytes + rx);
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if (((rwidth & 0x03) == 0) && (((intptr_t) dest & 0x03) == 0)) {
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// faster aligned dword clear
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ldest = (unsigned int *) dest;
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color += color << 16;
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rwidth >>= 2;
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color += color << 8;
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for (ry = 0; ry < rheight; ry++) {
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for (rx = 0; rx < rwidth; rx++)
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ldest[rx] = color;
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ldest = (unsigned int *) ((byte *) ldest + vid.rowbytes);
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}
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} else {
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// slower byte-by-byte clear for unaligned cases
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for (ry = 0; ry < rheight; ry++) {
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for (rx = 0; rx < rwidth; rx++)
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dest[rx] = color;
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dest += vid.rowbytes;
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}
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}
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}
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