shithub: vshot

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add -c flag to dump screenshot to stdout

	this option allows for piping vshot to format converters like topng.
	when used the screenshot menu option will dump the image to stdout and exit vshot.

	also added Return key shortcut to take screenshot

--- a/vshot.c

+++ b/vshot.c

@@ -46,6 +46,7 @@

 int		nwins;

 int		nload;

 int		cur;

+int		dump;

 void*

 emalloc(ulong size)

@@ -73,6 +74,10 @@

 	char buf[256] = {0};

 	int fd;

+	if(dump){

+		writememimage(1, wins[cur]->image);

+		threadexitsall(nil);

+	}

 	if(enter("Save as", buf, sizeof buf, mctl, kctl, nil)<=0)

 		return;

 	fd = create(buf, OWRITE, 0644);

@@ -299,9 +304,19 @@

 		{ nil, nil, CHANEND },

 	};

+	dump  = 0;

 	nload = 0;

 	nwins = 0;

-	cur = 0;

+	cur   = 0;

+	ARGBEGIN{

+	case 'c':

+		dump = 1;

+		break;

+	default:

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

+		threadexitsall("usage");

+	}ARGEND

+

 	if(initdraw(nil, nil, "vshot")<0)

 		sysfatal("initdraw: %r");

 	unlockdisplay(display);

@@ -355,6 +370,9 @@

 				if(cur<0)

 					cur = nwins - 1;

 				redraw();

+				break;

+			case '\n':

+				screenshot();

 				break;

 			}

 			break;