--- ray/src/px/ttyimage.c	1989/10/20 16:44:35	1.3
+++ ray/src/px/ttyimage.c	1991/04/18 14:35:47	1.7
@@ -25,7 +25,6 @@ char  **argv;
 	FILE  *input;
 	int  xres, yres;
 	COLR  scanline[NCOLS];
-	char  sbuf[256];
 	register int  i, j;
 	
 	if (argc < 2)
@@ -35,12 +34,10 @@ char  **argv;
 		exit(1);
 	}
 	
-				/* discard header */
-	while (fgets(sbuf, sizeof(sbuf), input) != NULL && sbuf[0] != '\n')
-		;
 				/* get picture dimensions */
-	if (fgetresolu(&xres, &yres, input) != (YMAJOR|YDECR)) {
-		fprintf(stderr, "%s: bad picture size\n", argv[0]);
+	if (checkheader(input, COLRFMT, NULL) < 0 ||
+			fgetresolu(&xres, &yres, input) != (YMAJOR|YDECR)) {
+		fprintf(stderr, "%s: bad picture format\n", argv[0]);
 		exit(1);
 	}
 	if (xres > NCOLS) {
@@ -53,6 +50,7 @@ char  **argv;
 			fprintf(stderr, "%s: read error\n", argv[0]);
 			exit(1);
 		}
+		normcolrs(scanline, xres, 0);
 		for (j = 0; j < xres; j++)
 			putchar(shade(scanline[j]));
 		putchar('\n');
@@ -69,13 +67,8 @@ COLR  clr;
 #define NSHADES  13
 
 	static char  shadech[NSHADES+1] = " .,:;+?%&*$@#";
-	COLR  nclr;
-	register int  b;
 
-	colr_norm(clr, nclr);
-	b = norm_bright(nclr);
-	b = b*NSHADES/256;
-	return(shadech[b]);
+	return(shadech[normbright(clr)*NSHADES/256]);
 
 #undef NSHADES
 }