shithub: pplay

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redraw: most redrawing only involves reseting view offsets and blanking bg

--- a/draw.c

+++ b/draw.c

@@ -154,7 +154,7 @@

 	if(z < 1 || z > nsamp / Dx(screen->r))

 		return;

 	zoom = z;

-	redraw();

+	redraw(0);

 }

 void

@@ -164,7 +164,7 @@

 	if(zoom == 1 || views == 0 && Δx < 0 || views >= viewmax && Δx > 0)

 		return;

 	views += Δx;

-	redraw();

+	redraw(0);

 }

 void

@@ -208,7 +208,7 @@

 	viewr = rectsubpt(screen->r, screen->r.min);

 	freeimage(viewbg);

 	freeimage(view);

-	viewbg = eallocimage(viewr, 0, DBlack);

+	viewbg = eallocimage(viewr, 0, DNofill);

 	view = eallocimage(viewr, 0, DBlack);

 	if(stereo){

 		midr = viewr;

@@ -228,7 +228,7 @@

 }

 void

-redraw(void)

+redraw(int all)

 {

 	vlong span;

@@ -243,7 +243,9 @@

 		views = viewmax;

 	viewe = views + span;

 	bgofs = views;

-	resetdraw();

+	if(all)

+		resetdraw();

+	draw(viewbg, viewbg->r, display->black, nil, ZP);

 	update();

 }

@@ -257,5 +259,5 @@

 	col[Cloop] = eallocimage(Rect(0,0,1,1), 1, 0x777777FF);

 	drawbg = drawsamps;

 	loope = filesz;

-	redraw();

+	redraw(1);

 }

--- a/fns.h

+++ b/fns.h

@@ -5,6 +5,6 @@

 void	setloop(vlong);

 void	setpos(vlong);

 void	setofs(vlong);

-void	redraw(void);

+void	redraw(int);

 void	initdrw(void);

 void*	emalloc(ulong);

--- a/pplay.c

+++ b/pplay.c

@@ -160,7 +160,7 @@

 			if(getwindow(display, Refnone) < 0)

 				sysfatal("resize failed: %r");

 			mo = mc->Mouse;

-			redraw();

+			redraw(1);

 			break;

 		case 1:

 			switch(mc->buttons){