home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Cream of the Crop 1
/
Cream of the Crop 1.iso
/
PROGRAM
/
CBGRX100.ARJ
/
LAYOUT.C
< prev
next >
Wrap
Text File
|
1992-04-10
|
2KB
|
63 lines
/**
** LAYOUT.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"
int GrLineOffset(int width)
{
if(width > 0) switch(_GrNumColors) {
#if (GRXPLANES & 16)
case 32768:
return(width << 1);
#endif
case 256:
if(_GrDriverIndex == MODE_X_DRIVER)
return((width + 3) >> 2);
return(width);
case 16:
case 2:
return((width + 7) >> 3);
}
return(0);
}
long GrPlaneSize(int w,int h)
{
return((h > 0) ? ((long)GrLineOffset(w) * (long)h) : 0L);
}
long GrContextSize(int w,int h)
{
switch(_GrNumColors) {
case 16:
return(GrPlaneSize(w,h) << 2);
case 256:
if(_GrDriverIndex == MODE_X_DRIVER)
return(GrPlaneSize(w,h) << 2);
default:
return(GrPlaneSize(w,h));
}
}