Xiaolin Wu's line algorithm: Difference between revisions

Content added Content deleted

Inline

@@ Line 2,729: / Line 2,729: @@
 def putpixel(img, xy, color, alpha=1):
+    """
-    """Paints color over the background at the point xy in img.
+    Paints color over the background at the point xy in img.
     Use alpha for blending. alpha=1 means a completely opaque foreground.
     """
-    c = tuple(map(lambda bg, fg: int(round(alpha * fg + (1-alpha) * bg)),
+    compose_color = lambda bg, fg: int(np.round(alpha * fg + (1-alpha) * bg))
-                  img.getpixel(xy), color))
+    c = compose_color(img.getpixel(xy), color, alpha)
     img.putpixel(xy, c)
@@ Line 2,763: / Line 2,762: @@
         return px
-    xstart = draw_endpoint(p(*p1)) + 1
+    xstart = draw_endpoint(p1) + 1
-    xend = draw_endpoint(p(*p2))
+    xend = draw_endpoint(p2)
     for x in range(xstart, xend):