X-Git-Url: https://git.karo-electronics.de/?p=metawatch.git;a=blobdiff_plain;f=mw_utility.c;fp=mw_utility.c;h=6d7ab8aac41ffde2eebd25e8310dec0136510654;hp=53c5f7ab3000e401e5d4f511d25eefe6453763f4;hb=9e2a8698714da2920e81942eb52c8040fbf73bef;hpb=5668a2fcb129077040e1856c5a3d1595c7ef06e7

diff --git a/mw_utility.c b/mw_utility.c
index 53c5f7a..6d7ab8a 100644
--- a/mw_utility.c
+++ b/mw_utility.c
@@ -256,6 +256,61 @@ void mw_buf_draw_line_bresenham(mw_buffer *mwbuf, unsigned int xstart, unsigned
 	}
 }
 
+void mw_buf_draw_line_bresenham_w(mw_buffer *mwbuf, unsigned int xstart, unsigned int ystart, unsigned int xend, unsigned int yend, unsigned char thickness, mw_color clr)
+{
+	int i, x, y, t, dx, dy, incx, incy, pdx, pdy, ddx, ddy, es, el, err;
+ 
+	dx = xend - xstart;
+	dy = yend - ystart;
+ 
+	incx = (dx >= 0) ? 1 : -1;
+	incy = (dy >= 0) ? 1 : -1;
+
+	if (dx<0)
+		dx = -dx;
+	if (dy<0)
+		dy = -dy;
+ 
+	if (dx>dy) {
+		pdx = incx; pdy = 0;
+		ddx=incx; ddy=incy;
+		es =dy;   el =dx;
+	} else {
+		pdx=0;    pdy=incy;
+		ddx=incx; ddy=incy;
+		es =dx;   el =dy;
+	}
+ 
+	x = xstart;
+	y = ystart;
+	err = el/2;
+	mw_buf_draw_pixel(mwbuf, x, y, clr);
+	for (i=1; i<thickness; i++) {
+		mw_buf_draw_pixel(mwbuf, x-i, y, clr);
+		mw_buf_draw_pixel(mwbuf, x+i, y, clr);
+		mw_buf_draw_pixel(mwbuf, x, y-i, clr);
+		mw_buf_draw_pixel(mwbuf, x, y+i, clr);
+	}
+ 
+	for (t = 0; t < el; ++t) {
+		err -= es; 
+		if (err < 0) {
+			err += el;
+			x += ddx;
+			y += ddy;
+		} else {
+			x += pdx;
+			y += pdy;
+		}
+		mw_buf_draw_pixel(mwbuf, x, y, clr);
+		for (i=1; i<thickness; i++) {
+			mw_buf_draw_pixel(mwbuf, x-i, y, clr);
+			mw_buf_draw_pixel(mwbuf, x+i, y, clr);
+			mw_buf_draw_pixel(mwbuf, x, y-i, clr);
+			mw_buf_draw_pixel(mwbuf, x, y+i, clr);
+		}
+	}
+}
 
 /* ----------------------------------------------------------------------
  * Complex combined functions, for user convenience