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usercord.h
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1993-12-06
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/**
** USERCORD.H
**
** 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 "scale.h"
#define U2SX(x,c) \
SCALE(x,((x) - (c)->gc_usrxbase),(c)->gc_xmax,(c)->gc_usrwidth)
#define U2SY(y,c) \
SCALE(y,((y) - (c)->gc_usrybase),(c)->gc_ymax,(c)->gc_usrheight)
#define S2UX(x,c) do { \
SCALE(x,x,(c)->gc_usrwidth,(c)->gc_xmax); \
(x) += (c)->gc_usrxbase; \
} while(0)
#define S2UY(y,c) do { \
SCALE(y,y,(c)->gc_usrheight,(c)->gc_ymax); \
(y) += (c)->gc_usrybase; \
} while(0)