mirror of
https://github.com/nzp-team/glquake.git
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89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
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/*
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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 the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// d_clear: clears a specified rectangle to the specified color
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#include "quakedef.h"
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/*
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================
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D_FillRect
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================
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*/
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void D_FillRect (vrect_t *rect, int color)
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{
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int rx, ry, rwidth, rheight;
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unsigned char *dest;
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unsigned *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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{
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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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{
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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) && (((long)dest & 0x03) == 0))
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{
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// faster aligned dword clear
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ldest = (unsigned *)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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{
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for (rx=0 ; rx<rwidth ; rx++)
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ldest[rx] = color;
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ldest = (unsigned *)((byte*)ldest + vid.rowbytes);
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}
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}
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else
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{
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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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{
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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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