shithub: spit

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add barf mode (thanks qwx)

	when passing the -n flag, spit will switch to barf mode and
	render the presentation to images instead of rendering to screen.

--- a/spit.c

+++ b/spit.c

@@ -15,6 +15,7 @@

 int			curslide;

 Image		*bol;

 Image		*bullet;

+int			nodraw;

 void

 ladd(Lines *l, char *s)

@@ -283,6 +284,22 @@

 }

 void

+barf(void)

+{

+	int fd;

+	char path[64];

+	Image **i;

+

+	for(i=slides; i<slides+nslides+1; i++){

+		snprint(path, sizeof path, "spit.%03zd.bit", i - slides);

+		if((fd = create(path, OWRITE, 0644)) < 0)

+			sysfatal("open: %r");

+		writeimage(fd, *i, 0);

+		close(fd);

+	}

+}

+

+void

 redraw(void)

 {

 	draw(screen, screen->r, slides[curslide], nil, ZP);

@@ -364,7 +381,7 @@

 void

 usage(void)

 {

-	fprint(2, "%s [-f font] [-F fixedfont] <filename>\n", argv0);

+	fprint(2, "%s [-n] [-f font] [-F fixedfont]<filename>\n", argv0);

 	exits("usage");

 }

@@ -385,6 +402,9 @@

 	tname = nil;

 	fname = nil;

 	ARGBEGIN{

+	case 'n':

+		nodraw = 1;

+		break;

 	case 'f':

 		tname = EARGF(usage());

 		break;

@@ -419,6 +439,10 @@

 	initstyle(tname, fname);

 	initimages();

 	render(f);

+	if(nodraw){

+		barf();

+		threadexitsall(nil);

+	}

 	resize();

 	for(;;){

 		switch(alt(alts)){