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p8char.c
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1993-12-06
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/**
** P8CHAR.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 "p8.h"
#include "bytedraw.h"
void _GrP8DrawChar(long a,int w,int h,char far *bits,int fg,int bg)
{
pixptr p = P_ADDRESS(CURC,a);
int skip = CURC->gc_lineoffset - w;
int fgop = C_OPER(fg);
int bgop = C_OPER(bg);
int drawfg = _GrP8DrawTable[fgop] ^ (fg &= C_SIGNIF);
int drawbg = _GrP8DrawTable[bgop] ^ (bg &= C_SIGNIF);
if((w <= 0) || (h <= 0)) return;
if(_GrP8UsePlanarMode) PLANAR_MODE_OFF();
_ClrDir();
_SaveDS();
if(drawfg && drawbg && (fgop == bgop)) {
bg |= ((bg ^ fg) << 8);
switch(fgop) {
case C_XOR: _WriteFontXor(p,skip,bits,w,h,bg); break;
case C_OR: _WriteFontOr(p,skip,bits,w,h,bg); break;
case C_AND: _WriteFontAnd(p,skip,bits,w,h,bg); break;
default: _WriteFont(p,skip,bits,w,h,bg); break;
}
}
else {
if(drawfg) switch(fgop) {
case C_XOR: _WrFGCFontXor(p,skip,bits,w,h,fg); break;
case C_OR: _WrFGCFontOr(p,skip,bits,w,h,fg); break;
case C_AND: _WrFGCFontAnd(p,skip,bits,w,h,fg); break;
default: _WrFGCFont(p,skip,bits,w,h,fg); break;
}
if(drawbg) switch(bgop) {
case C_XOR: _WrBGCFontXor(p,skip,bits,w,h,bg); break;
case C_OR: _WrBGCFontOr(p,skip,bits,w,h,bg); break;
case C_AND: _WrBGCFontAnd(p,skip,bits,w,h,bg); break;
default: _WrBGCFont(p,skip,bits,w,h,bg); break;
}
}
_RestoreDS();
}