Import wily_0.13.41.orig.tar.gz

[dgit import orig wily_0.13.41.orig.tar.gz]

1 files changed, 44 insertions, 0 deletions

diff --git a/libXg/arc.c b/libXg/arc.c
new file mode 100644
index 0000000..44a8282
--- /dev/null
+++ b/libXg/arc.c
@@ -0,0 +1,44 @@
+/* Copyright (c) 1992 AT&T - All rights reserved. */
+#include <libc.h>
+#include <libg.h>
+#include "libgint.h"
+#include <math.h>
+
+#define rad2deg(x) 180*((x)/3.1415926535897932384626433832795028841971693993751)
+
+void
+arc(Bitmap *b, Point p0, Point p1, Point p2, int v, Fcode f)
+{
+	unsigned int d;
+	int x, y, r, start, end, delta;
+	GC g;
+
+	p1.x -= p0.x;
+	p1.y -= p0.y;
+	p2.x -= p0.x;
+	p2.y -= p0.y;
+	r = (int)sqrt((double)(p1.x*p1.x + p1.y*p1.y));
+	start = (int)(64*rad2deg(atan2(-p2.y, p2.x)));
+	end = (int)(64*rad2deg(atan2(-p1.y, p1.x)));
+	if(start < 0)
+		start += 64*360;
+	if(end < 0)
+		end += 64*360;
+	delta = end - start;
+	if(delta < 0)
+		delta += 64*360;
+	x = p0.x - r;
+	y = p0.y - r;
+	if(b->flag&SHIFT){
+		x -= b->r.min.x;
+		y -= b->r.min.y;
+	}
+	d = 2*r;
+	g = _getfillgc(f, b, v);
+	/*
+	 * delta is positive, so this draws counterclockwise arc
+	 * from start to start+delta
+	 */
+	XDrawArc(_dpy, (Drawable)b->id, g, x, y, d, d, start, delta);
+}
+