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Libris Britannia 4
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circle.c
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1993-12-06
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/**
** CIRCLE.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 GrEllipse(int xc,int yc,int xa,int ya,int c)
{
_GrScanEllipse(xc,yc,xa,ya,
FALSE,
IS_XOR_COLOR(c),
_GrDrawSolidPixel,
_GrDrawSolidLine,
_GrFillSolidScanLine,
&c
);
}
void GrEllipseArc(int xc,int yc,int xa,int ya,int start,int end,int c)
{
int points[MAX_ELLIPSE_PTS+1][2];
int numpts = _GrGenerateEllipseArc(points,xc,yc,xa,ya,start,end,FALSE);
_GrDrawPolygon(IABS(numpts),points,
(numpts < 0),
IS_XOR_COLOR(c),
_GrDrawSolidPixel,
_GrDrawSolidLine,
&c
);
}
void GrCircle(int xc,int yc,int r,int c)
{
GrEllipse(xc,yc,r,r,c);
}
void GrCircleArc(int xc,int yc,int r,int start,int end,int c)
{
GrEllipseArc(xc,yc,r,r,start,end,c);
}