--- ray/src/rt/x11.c	1993/02/11 16:33:10	2.9
+++ ray/src/rt/x11.c	1993/11/22 11:33:02	2.14
@@ -11,7 +11,7 @@ static char SCCSid[] = "$SunId$ LBL";
  */
 
 #include  <stdio.h>
-
+#include  <math.h>
 #include  <sys/ioctl.h>
 
 #include  <X11/Xlib.h>
@@ -78,7 +78,11 @@ static struct driver  x11_driver = {
 	x11_comout, x11_comin, x11_flush, 1.0
 };
 
+static int  getpixels(), xnewcolr(), freepixels(), resizewindow(),
+		getevent(), getkey(), fixwindow(), x11_getc();
+static unsigned long  true_pixel();
 
+
 struct driver *
 x11_init(name, id)		/* initialize driver */
 char  *name, *id;
@@ -121,7 +125,8 @@ char  *name, *id;
 		ourwhite = WhitePixel(ourdisplay,ourscreen);
 	}
 					/* set gamma */
-	if ((gv = getenv("GAMMA")) != NULL)
+	if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
+			|| (gv = getenv("GAMMA")) != NULL)
 		make_gmap(atof(gv));
 	else
 		make_gmap(GAMMA);
@@ -239,8 +244,6 @@ x11_paintr(col, xmin, ymin, xmax, ymax)		/* fill a rec
 COLOR  col;
 int  xmin, ymin, xmax, ymax;
 {
-	extern int  xnewcolr();		/* pixel assignment routine */
-	extern unsigned long  true_pixel();
 	unsigned long  pixel;
 
 	if (!mapped)
@@ -268,8 +271,6 @@ static
 x11_comin(inp, prompt)		/* read in a command line */
 char  *inp, *prompt;
 {
-	extern int  x11_getc();
-
 	if (prompt != NULL)
 		if (fromcombuf(inp, &x11_driver))
 			return;
@@ -321,14 +322,12 @@ int  *xp, *yp;
 	if (c_last > c_first)			/* key pressed */
 		return(x11_getc());
 						/* button pressed */
-	if (levptr(XButtonPressedEvent)->button & Button1)
+	if (levptr(XButtonPressedEvent)->button == Button1)
 		return(MB1);
-	if (levptr(XButtonPressedEvent)->button & Button2)
+	if (levptr(XButtonPressedEvent)->button == Button2)
 		return(MB2);
-	if (levptr(XButtonPressedEvent)->button & Button3)
+	if (levptr(XButtonPressedEvent)->button == Button3)
 		return(MB3);
-	if (levptr(XButtonPressedEvent)->button & (Button4|Button5))
-		return(MB1);
 	return(ABORT);
 }