code: drawterm

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drawterm: debounce screen resize

--- a/gui-win32/screen.c

+++ b/gui-win32/screen.c

@@ -445,16 +445,7 @@

 	case WM_SIZE:

 		if(GetClientRect(hwnd, &winr) == 0)

 			break;

-		r = Rect(0, 0, winr.right - winr.left, winr.bottom - winr.top);

-		if(rectclip(&r, gscreen->r) == 0 || badrect(r))

-			break;

-		qlock(&drawlock);

-		gscreen->clipr = r;

-		qunlock(&drawlock);

-		screenwin();

-		deletescreenimage();

-		resetscreenimage();

-		mouseresize();

+		screenresize(Rect(0, 0, winr.right - winr.left, winr.bottom - winr.top));

 		break;

 	case WM_COMMAND:

--- a/gui-x11/x11.c

+++ b/gui-x11/x11.c

@@ -656,20 +656,9 @@

 static void

 xresize(XEvent *e)

 {

-	Rectangle r;

-

 	if(e->type != ConfigureNotify)

 		return;

-	r = Rect(0, 0, ((XConfigureEvent*)e)->width, ((XConfigureEvent*)e)->height);

-	if(rectclip(&r, gscreen->r) == 0 || badrect(r) || eqrect(r, gscreen->clipr))

-		return;

-	qlock(&drawlock);

-	gscreen->clipr = r;

-	qunlock(&drawlock);

-	screenwin();

-	deletescreenimage();

-	resetscreenimage();

-	mouseresize();

+	screenresize(Rect(0, 0, ((XConfigureEvent*)e)->width, ((XConfigureEvent*)e)->height));

 }

 static void

--- a/kern/screen.h

+++ b/kern/screen.h

@@ -58,7 +58,7 @@

 #define	ishwimage(i)	0

 void	terminit(void);

-void	screenwin(void);

+void	screenresize(Rectangle);

 void	mouseresize(void);

 void	mousetrack(int, int, int, ulong);

--- a/kern/term.c

+++ b/kern/term.c

@@ -47,7 +47,7 @@

 		combinerect(&flushr, r);

 }

-void

+static void

 screenwin(void)

 {

 	Point p;

@@ -86,7 +86,56 @@

 	qunlock(&drawlock);

 }

+static struct {

+	Rectangle	r;

+	Rendez		z;

+	int		f;

+} resize;

+

+static int

+isresized(void *arg)

+{

+	return resize.f != 0;

+}

+

+static void

+resizeproc(void *arg)

+{

+	USED(arg);

+	for(;;){

+		sleep(&resize.z, isresized, nil);

+		qlock(&drawlock);

+		resize.f = 0;

+		if(gscreen == nil

+		|| badrect(resize.r)

+		|| rectclip(&resize.r, gscreen->r) == 0

+		|| eqrect(resize.r, gscreen->clipr)){

+			qunlock(&drawlock);

+			continue;

+		}

+		gscreen->clipr = resize.r;

+		qunlock(&drawlock);

+

+		screenwin();

+		deletescreenimage();

+		resetscreenimage();

+		mouseresize();

+

+		osmsleep(1000);

+	}

+}

+

 void

+screenresize(Rectangle r)

+{

+	qlock(&drawlock);

+	resize.r = r;

+	resize.f = 1;

+	wakeup(&resize.z);

+	qunlock(&drawlock);

+}

+

+void

 terminit(void)

 {

 	memdefont = getmemdefont();

@@ -95,6 +144,7 @@

 	out.bwid = memdefont->info[' '].width;

 	screenwin();

 	screenputs = termscreenputs;

+	kproc("resize", resizeproc, nil);

 }

 static void