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- /**
- ** LINE.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"
- #include "lineclip.h"
-
- void GrLine(int x1,int y1,int x2,int y2,int c)
- {
- MOUSE_FLAG;
-
- if(y1 == y2) {
- CLIPHLINE(CURC,x1,x2,y1);
- MOUSE_BLOCK(CURC,x1,y1,x2,y1);
- _GrSetPixRow(PIXEL_ADDR(x1,y1),c,(x2 - x1 + 1));
- }
- else if(x1 == x2) {
- CLIPVLINE(CURC,x1,y1,y2);
- MOUSE_BLOCK(CURC,x1,y1,x1,y2);
- _GrSetPixColumn(PIXEL_ADDR(x1,y1),c,(y2 - y1 + 1));
- }
- else {
- CLIPLINE(CURC,x1,y1,x2,y2);
- MOUSE_BLOCK(CURC,x1,MIN(y1,y2),x2,MAX(y1,y2));
- _GrDrawLine(PIXEL_ADDR(x1,y1),c,(x2 - x1),(y2 - y1));
- }
- MOUSE_UNBLOCK();
- }
-