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CLEAR.C
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1992-04-10
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/**
** CLEAR.C
**
** Copyright (C) 1992, Csaba Biegl
** 820 Stirrup Dr, Nashville, TN, 37221
** csaba@vuse.vanderbilt.edu
**
** This file is distributed under the terms listed in the document
** "copying.cb", available from the author at the address above.
** A copy of "copying.cb" should accompany this file; if not, a copy
** should be available from where this file was obtained. This file
** may not be distributed without a verbatim copy of "copying.cb".
** You should also have received a copy of the GNU General Public
** License along with this program (it is in the file "copying");
** if not, write to the Free Software Foundation, Inc., 675 Mass Ave,
** Cambridge, MA 02139, USA.
**
** 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.
**/
#include "grx.h"
#include "libgrx.h"
void GrClearClipBox(int bg)
{
MOUSE_FLAG;
MOUSE_BLOCK(CURC,_GrLoX,_GrLoY,_GrHiX,_GrHiY);
_GrSetPixBlock(PIXEL_ADDR(_GrLoX,_GrLoY),
bg,
(_GrHiX - _GrLoX + 1),
(_GrHiY - _GrLoY + 1)
);
MOUSE_UNBLOCK();
}
void GrClearContext(int bg)
{
MOUSE_FLAG;
MOUSE_BLOCK(CURC,0,0,_GrMaxX,_GrMaxY);
_GrSetPixBlock(PIXEL_ADDR(0,0),bg,_GrSizeX,_GrSizeY);
MOUSE_UNBLOCK();
}
void GrClearScreen(int bg)
{
GrContext save;
MOUSE_FLAG;
GrSaveContext(&save);
GrSetContext(SCREEN);
MOUSE_BLOCK(CURC,0,0,_GrMaxX,_GrMaxY);
_GrSetPixBlock(PIXEL_ADDR(0,0),bg,_GrScreenX,_GrScreenY);
MOUSE_UNBLOCK();
GrSetContext(&save);
}