--- ray/src/px/x11image.c	1990/12/21 17:20:11	1.12
+++ ray/src/px/x11image.c	1991/05/03 09:49:02	1.18
@@ -37,6 +37,8 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #define  BORWIDTH	5		/* border width */
 
+#define  ICONSIZ	(8*10)		/* maximum icon dimension (even 8) */
+
 #define  ourscreen	DefaultScreen(thedisplay)
 #define  ourblack	BlackPixel(thedisplay,ourscreen)
 #define  ourwhite	WhitePixel(thedisplay,ourscreen)
@@ -77,6 +79,8 @@ int  cury = 0;				/* current scan location */
 
 double  exposure = 1.0;			/* exposure compensation used */
 
+int  wrongformat = 0;			/* input in another format? */
+
 GC	revgc;				/* graphics context with GXinvert */
 
 XRASTER	*ourras;			/* our stored image */
@@ -88,6 +92,9 @@ struct {
 
 char  *geometry = NULL;			/* geometry specification */
 
+char  icondata[ICONSIZ*ICONSIZ/8];	/* icon bitmap data */
+int  iconwidth = 0, iconheight = 0;
+
 char  *progname;
 
 char  errmsg[128];
@@ -156,10 +163,10 @@ char  *argv[];
 	} else if (i != argc)
 		goto userr;
 				/* get header */
-	getheader(fin, headline);
+	getheader(fin, headline, NULL);
 				/* get picture dimensions */
-	if (fgetresolu(&xmax, &ymax, fin) != (YMAJOR|YDECR))
-		quiterr("bad picture size");
+	if (wrongformat || fgetresolu(&xmax, &ymax, fin) != (YMAJOR|YDECR))
+		quiterr("bad picture format");
 				/* set view parameters */
 	if (gotview && setview(&ourview) != NULL)
 		gotview = 0;
@@ -183,10 +190,14 @@ char  *s;
 {
 	static char  *altname[] = {"rview","rpict","pinterp",VIEWSTR,NULL};
 	register char  **an;
+	char  fmt[32];
 
 	if (isexpos(s))
 		exposure *= exposval(s);
-	else
+	else if (isformat(s)) {
+		formatval(fmt, s);
+		wrongformat = strcmp(fmt, COLRFMT);
+	} else
 		for (an = altname; *an != NULL; an++)
 			if (!strncmp(*an, s, strlen(*an))) {
 				if (sscanview(&ourview, s+strlen(*an)) > 0)
@@ -198,6 +209,7 @@ char  *s;
 
 init()			/* get data and open window */
 {
+	XWMHints	ourxwmhints;
 	XSetWindowAttributes	ourwinattr;
 	XSizeHints  oursizhints;
 	register int  i;
@@ -260,6 +272,11 @@ init()			/* get data and open window */
 		}
 		XSetNormalHints(thedisplay, wind, &oursizhints);
 	}
+	ourxwmhints.flags = InputHint|IconPixmapHint;
+	ourxwmhints.input = True;
+	ourxwmhints.icon_pixmap = XCreateBitmapFromData(thedisplay,
+			wind, icondata, iconwidth, iconheight);
+	XSetWMHints(thedisplay, wind, &ourxwmhints);
 	XSelectInput(thedisplay, wind, ButtonPressMask|ButtonReleaseMask
 			|ButtonMotionMask|StructureNotifyMask
 			|KeyPressMask|ExposureMask);
@@ -411,7 +428,7 @@ XKeyPressedEvent  *ekey;
 			sprintf(buf, "%.3f", intens(cval)/exposure);
 			break;
 		case 'l':				/* luminance */
-			sprintf(buf, "%.0fn", bright(cval)*683.0/exposure);
+			sprintf(buf, "%.0fL", luminance(cval)/exposure);
 			break;
 		case 'c':				/* color */
 			comp = pow(2.0, (double)scale);
@@ -614,6 +631,7 @@ getmono()			/* get monochrome data */
 		if (getscan(y) < 0)
 			quiterr("seek error in getmono");
 		normcolrs(scanline, xmax, scale);
+		add2icon(y, scanline);
 		err = 0;
 		for (x = 0; x < xmax; x++) {
 			if (!(x&7))
@@ -630,6 +648,49 @@ getmono()			/* get monochrome data */
 }
 
 
+add2icon(y, scan)		/* add a scanline to our icon data */
+int  y;
+COLR  *scan;
+{
+	static char  *dp = NULL;
+	static short  cerr[ICONSIZ];
+	register int  err;
+	register int	x, xi;
+
+	if (iconheight == 0) {		/* initialize */
+		if (xmax <= ICONSIZ && ymax <= ICONSIZ) {
+			iconwidth = xmax;
+			iconheight = ymax;
+		} else if (xmax > ymax) {
+			iconwidth = ICONSIZ;
+			iconheight = ICONSIZ*ymax/xmax;
+		} else {
+			iconwidth = ICONSIZ*xmax/ymax;
+			iconheight = ICONSIZ;
+		}
+		dp = icondata - 1;
+	}
+	if (dp == NULL)			/* done already */
+		return;
+	if (y % (ymax/iconheight))	/* skip this one */
+		return;
+	err = 0;
+	for (x = 0; x < iconwidth; x++) {
+		if (!(x&7))
+			*++dp = 0;
+		xi = x*xmax/iconwidth;
+		err += normbright(scan[xi]) + cerr[x];
+		if (err > 127)
+			err -= 255;
+		else
+			*dp |= 1<<(x&07);
+		cerr[x] = err >>= 1;
+	}
+	if (y >= ymax - ymax/iconheight)	/* all done */
+		dp = NULL;
+}
+
+
 getfull()			/* get full (24-bit) data */
 {
 	int	y;
@@ -645,6 +706,7 @@ getfull()			/* get full (24-bit) data */
 		if (scale)
 			shiftcolrs(scanline, xmax, scale);
 		colrs_gambs(scanline, xmax);
+		add2icon(y, scanline);
 		for (x = 0; x < xmax; x++) {
 			*dp++ = scanline[x][RED];
 			*dp++ = scanline[x][GRN];
@@ -712,6 +774,7 @@ register rgbpixel  *l3;
 		quiterr("cannot seek for picreadline");
 							/* convert scanline */
 	normcolrs(scanline, xmax, scale);
+	add2icon(y, scanline);
 	for (i = 0; i < xmax; i++) {
 		l3[i].r = scanline[i][RED];
 		l3[i].g = scanline[i][GRN];