[ViewVC] Diff of: radiance/ray/src/px/x11image.c

Comparing ray/src/px/x11image.c (file contents):
Revision 1.22 by greg, Fri May 3 13:28:39 1991 UTC vs.
Revision 1.23 by greg, Mon May 6 13:14:17 1991 UTC

#	Line 621 \| Line 621 \| *getmono() / get monochrome data /*
621		{
622		register unsigned char *dp;
623		register int x, err;
624	<	int y;
624	>	int y, errp;
625		short *cerr;
626
627		if ((cerr = (short *)calloc(xmax,sizeof(short))) == NULL)
#	Line 636 \| Line 636 \| *getmono() / get monochrome data /*
636		for (x = 0; x < xmax; x++) {
637		if (!(x&7))
638		*++dp = 0;
639	+	errp = err;
640		err += normbright(scanline[x]) + cerr[x];
641		if (err > 127)
642		err -= 255;
643		else
644		*dp \|= 1<<(7-(x&07));
645	<	cerr[x] = err >>= 1;
645	>	err /= 3;
646	>	cerr[x] = err + errp;
647		}
648		}
649		free((char *)cerr);
#	Line 657 \| Line 659 \| *COLR scan;**
659		static char *dp;
660		register int err;
661		register int x, ti;
662	+	int errp;
663
664		if (iconheight == 0) { /* initialize */
665		if (xmax <= ICONSIZ && ymax <= ICONSIZ) {
#	Line 678 \| Line 681 \| *COLR scan;**
681		for (x = 0; x < iconwidth; x++) {
682		if (!(x&7))
683		*++dp = 0;
684	+	errp = err;
685		ti = x*xmax/iconwidth;
686		err += normbright(scan[ti]) + cerr[x];
687		if (err > 127)
688		err -= 255;
689		else
690		*dp \|= 1<<(x&07);
691	<	cerr[x] = err >>= 1;
691	>	err /= 3;
692	>	cerr[x] = err + errp;
693		}
694		ynext++;
695		}

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