code: drawterm

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libmemdraw: update memarc() and memellipse() from 9front

--- a/libmemdraw/arc.c

+++ b/libmemdraw/arc.c

@@ -24,9 +24,6 @@

 	{1,-1}

 };

-static

-Point p00;

-

 /*

  * make a "wedge" mask covering the desired angle and contained in

  * a surrounding square; draw a full ellipse; intersect that with the

@@ -40,13 +37,13 @@

 	Point p,	bnd[8];

 	Memimage *wedge, *figure, *mask;

-	if(a < 0)

-		a = -a;

-	if(b < 0)

-		b = -b;

-	w = t;

-	if(w < 0)

-		w = 0;

+	if(phi == 0)

+		return;

+	if(phi <= -360 || phi >= 360){

+		memellipse(dst, c, a, b, t, src, sp, op);

+		return;

+	}

+	alpha %= 360;

 	alpha = -alpha;		/* compensate for upside-down coords */

 	phi = -phi;

 	beta = alpha + phi;

@@ -56,10 +53,6 @@

 		beta = tmp;

 		phi = -phi;

 	}

-	if(phi >= 360){

-		memellipse(dst, c, a, b, t, src, sp, op);

-		return;

-	}

 	while(alpha < 0)

 		alpha += 360;

 	while(beta < 0)

@@ -70,6 +63,15 @@

 		 * icossin returns point at radius ICOSSCALE.

 		 * multiplying by m1 moves it outside the ellipse

 		*/

+

+	if(a < 0)

+		a = -a;

+	if(b < 0)

+		b = -b;

+	w = t;

+	if(w < 0)

+		w = 0;

+

 	rect = Rect(-a-w, -b-w, a+w+1, b+w+1);

 	m = rect.max.x;	/* inradius of bounding square */

 	if(m < rect.max.y)

@@ -96,12 +98,12 @@

 	if(wedge == nil)

 		goto Return;

 	memfillcolor(wedge, DTransparent);

-	memfillpoly(wedge, bnd, i, ~0, memopaque, p00, S);

+	memfillpoly(wedge, bnd, i, ~0, memopaque, ZP, S);

 	figure = allocmemimage(rect, GREY1);

 	if(figure == nil)

 		goto Return;

 	memfillcolor(figure, DTransparent);

-	memellipse(figure, p00, a, b, t, memopaque, p00, S);

+	memellipse(figure, ZP, a, b, t, memopaque, ZP, S);

 	mask = allocmemimage(rect, GREY1);

 	if(mask == nil)

 		goto Return;

@@ -108,7 +110,7 @@

 	memfillcolor(mask, DTransparent);

 	memimagedraw(mask, rect, figure, rect.min, wedge, rect.min, S);

 	c = subpt(c, dst->r.min);

-	memdraw(dst, dst->r, src, subpt(sp, c), mask, subpt(p00, c), op);

+	memdraw(dst, dst->r, src, subpt(sp, c), mask, subpt(ZP, c), op);

     Return:

 	freememimage(wedge);

--- a/libmemdraw/ellipse.c

+++ b/libmemdraw/ellipse.c

@@ -164,8 +164,6 @@

 	}

 }

-static Point p00 = {0, 0};

-

 /*

  * a brushed ellipse

  */

@@ -180,7 +178,7 @@

 	if(p->disc == nil)

 		return;

 	memfillcolor(p->disc, DTransparent);

-	memellipse(p->disc, p00, t, t, -1, memopaque, p00, p->op);

+	memellipse(p->disc, ZP, t, t, -1, memopaque, ZP, p->op);

 	oy = y;

 	ox = 0;

 	nx = x = step(s);

@@ -211,7 +209,7 @@

 /*	print("R %d,%d %d,%d\n", x0, y0, x1, y1); /**/

 	r = Rect(p->c.x+x0, p->c.y+y0, p->c.x+x1+1, p->c.y+y1+1);

-	memdraw(p->dst, r, p->src, addpt(p->sp, r.min), memopaque, p00, p->op);

+	memdraw(p->dst, r, p->src, addpt(p->sp, r.min), memopaque, ZP, p->op);

 }

 /*