--- ray/src/util/dcglare.c	2021/06/24 18:08:07	2.4
+++ ray/src/util/dcglare.c	2025/03/05 02:59:58	2.8
@@ -1,3 +1,6 @@
+#ifndef lint
+static const char RCSid[] = "$Id: dcglare.c,v 2.8 2025/03/05 02:59:58 greg Exp $";
+#endif
 /*
  * Compute time-step glare using imageless DGP calculation method.
  *
@@ -83,7 +86,7 @@ sum_images(const char *fspec, const CMATRIX *cv, FILE 
 			pmat = cm_alloc(myYR, myXR);
 			memset(pmat->cmem, 0, sizeof(COLOR)*myXR*myYR);
 							/* finish header */
-			fputformat((char *)cm_fmt_id[myDT], fout);
+			fputformat(cm_fmt_id[myDT], fout);
 			fputc('\n', fout);
 			fflush(fout);
 		} else if ((dt != myDT) | (xr != myXR) | (yr != myYR)) {
@@ -93,7 +96,7 @@ sum_images(const char *fspec, const CMATRIX *cv, FILE 
 		}
 							/* flat file check */
 		if ((data_start = ftell(fp)) > 0 && fseek(fp, 0L, SEEK_END) == 0) {
-			flat_file = (ftell(fp) == data_start + sizeof(COLR)*xr*yr);
+			flat_file = (ftell(fp) >= data_start + sizeof(COLR)*xr*yr);
 			if (fseek(fp, data_start, SEEK_SET) < 0) {
 				sprintf(errmsg, "cannot seek on picture '%s'", fname);
 				error(SYSTEM, errmsg);
@@ -475,9 +478,9 @@ main(int argc, char *argv[])
 					fprintf(ofp, "FRAME=%d\n", i);
 					fprintf(ofp, "NROWS=%d\n", rvec->nrows);
 					fputs("NCOLS=1\nNCOMP=3\n", ofp);
-					if ((outfmt == 'f') | (outfmt == 'd'))
+					if ((outfmt == DTfloat) | (outfmt == DTdouble))
 						fputendian(ofp);
-					fputformat((char *)cm_fmt_id[outfmt], ofp);
+					fputformat(cm_fmt_id[outfmt], ofp);
 					fputc('\n', ofp);
 				}
 				cm_write(rvec, outfmt, ofp);
@@ -508,9 +511,9 @@ main(int argc, char *argv[])
 				fprintf(ofp, "NCOLS=%d\n", rmtx->ncols);
 				fputs("NCOMP=3\n", ofp);
 #endif /* DC_GLARE */
-				if ((outfmt == 'f') | (outfmt == 'd'))
+				if ((outfmt == DTfloat) | (outfmt == DTdouble))
 					fputendian(ofp);
-				fputformat((char *)cm_fmt_id[outfmt], ofp);
+				fputformat(cm_fmt_id[outfmt], ofp);
 				fputc('\n', ofp);
 			}
 #ifdef DC_GLARE