shithub: prez

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apply revert background patch

--- a/prez.c

+++ b/prez.c

@@ -599,7 +599,7 @@

 void

 usage(void)

 {

-	fprint(2, "usage: %s [ file ]\n", argv0);

+	fprint(2, "usage: %s [-b] [file]\n", argv0);

 	exits("usage");

 }

@@ -609,12 +609,14 @@

 	char *s, buf[1024];

 	Rectangle r;

 	Image *img;

-	int i, fd;

+	int i, invbg, fd;

 	Event e;

 	Mouse m;

 	Point p, d;

+	invbg = 0;

 	ARGBEGIN {

+	case 'b': invbg = 1; break;

 	default:

 		usage();

 	} ARGEND;

@@ -642,8 +644,13 @@

 		if(pal[i] == nil)

 			sysfatal("allocimage: %r");

 	}

-	ink = pal[0];

-	back = pal[1];

+	if(invbg){

+		ink = pal[1];

+		back = pal[0];

+	}else{

+		ink = pal[0];

+		back = pal[1];

+	}

 	drawpal();

 	center();