shithub: pplay

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draw: adjustments to avoid any drawing artefacts

--- a/dat.h

+++ b/dat.h

@@ -42,6 +42,12 @@

 extern QLock lsync;

+enum{

+	Drawcur,

+	Drawrender,

+	Drawall,

+};

+

 extern int stereo;

 extern int debug, paused;

 extern int debugdraw;

--- a/draw.c

+++ b/draw.c

@@ -194,40 +194,39 @@

 }

 static void

-update(void)

-{

-	lockdisplay(display);

-	if(stalerender || working){

-		if(!working)

-			stalerender = 0;

-		render();

-		draw(screen, rectaddpt(view->r, screen->r.min), view, nil, ZP);

-	}else

-		erasemark(linepos);

-	renderpos(current->cur, col[Cline], 1);

-	linepos = current->cur;

-	drawstat();

-	flushimage(display, 1);

-	unlockdisplay(display);

-}

-

-static void

 drawproc(void*)

 {

+	int what;

+

 	threadsetname("drawer");

 	for(;;){

-		if(recv(drawc, nil) < 0){

+		if(recv(drawc, &what) < 0){

 			fprint(2, "drawproc: %r\n");

 			break;

 		}

-		update();

+		lockdisplay(display);

+		if(what == Drawcur)

+			erasemark(linepos);

+		else{

+			if(what == Drawrender || stalerender || working){

+				if(!working)

+					stalerender = 0;

+				render();

+			}

+			draw(screen, rectaddpt(view->r, screen->r.min), view, nil, ZP);

+		}

+		renderpos(current->cur, col[Cline], 1);

+		linepos = current->cur;

+		drawstat();

+		flushimage(display, 1);

+		unlockdisplay(display);

 	}

 }

 void

-refresh(void)

+refresh(int what)

 {

-	nbsend(drawc, nil);

+	nbsend(drawc, &what);

 }

 static void

@@ -304,7 +303,7 @@

 		working = 1;

 		stalerender = 1;

 		sample(d);

-		refresh();

+		refresh(Drawall);

 		working = 0;

 	}

 }

@@ -347,7 +346,7 @@

 		resetdraw();

 	unlockdisplay(display);

 	if(paused)

-		refresh();

+		refresh(Drawall);

 	/* FIXME: this overloading is stupid; just fork for each? have multiple

 	 * workers to begin with à la page? */

 	d = *current;

@@ -430,8 +429,7 @@

 		current->cur = from;

 	current->off = -1;

 	stalerender = 1;

-	if(paused)

-		refresh();

+	refresh(Drawrender);

 }

 int

@@ -444,8 +442,7 @@

 	}

 	current->off = current->cur = off;

 	stalerender = 1;

-	if(paused)

-		refresh();

+	refresh(Drawrender);

 	return 0;

 }

--- a/fns.h

+++ b/fns.h

@@ -10,7 +10,7 @@

 Chunk*	loadfile(int, Dot*);

 int	cmd(char*);

 int	initcmd(int);

-void	refresh(void);

+void	refresh(int);

 void	setzoom(int, int);

 int	zoominto(vlong, vlong);

 void	setrange(usize, usize);

--- a/pplay.c

+++ b/pplay.c

@@ -63,7 +63,7 @@

 			}

 			memcpy(bp, b, n);

 			advance(current, n);

-			refresh();

+			refresh(Drawcur);

 		}

 		if(write(afd, buf, sizeof buf) != sizeof buf){

 			fprint(2, "aproc write: %r\n");

@@ -90,7 +90,7 @@

 	chartorune(&q, buf);

 	if(q != r)

           snprint(buf, sizeof buf, "%C", r);

-	if(enter(nil, buf, sizeof(buf)-UTFmax, mc, kc, nil) < 0)

+	if(enter("cmd:", buf, sizeof(buf)-UTFmax, mc, kc, _screen) < 0)

 		return nil;

 	return buf;

 }

@@ -170,7 +170,7 @@

 			switch(r){

 			case Kdel:

 			case 'q': threadexitsall(nil);

-			case 'D': debug ^= 1; debugdraw ^= 1; break;

+			case 'D': debug ^= 1; debugdraw ^= 1; refresh(Drawrender); break;

 			case 'S': stereo ^= 1; redraw(1); break;

 			case ' ': toggleplay(); break;

 			case 'b': setjump(current->from); break;

@@ -184,11 +184,13 @@

 			case Kleft: setpage(-1); break;

 			case Kright: setpage(1); break;

 			default:

-				if((p = prompt(r)) == nil || strlen(p) == 0)

+				if((p = prompt(r)) == nil || strlen(p) == 0){

+					refresh(Drawrender);

 					break;

+				}

 				switch(cmd(p)){

 				case -1: fprint(2, "cmd \"%s\" failed: %r\n", p); break;

-				case 0: refresh(); break;

+				case 0: refresh(Drawall); break;

 				case 1: redraw(0); break;

 				case 2: redraw(1); break;

 				}