Xiaolin Wu's line algorithm: Difference between revisions
Content added Content deleted
(self bugfix of bugfix) |
|||
| Line 2,733: | Line 2,733: | ||
Use alpha for blending. alpha=1 means a completely opaque foreground. |
Use alpha for blending. alpha=1 means a completely opaque foreground. |
||
""" |
""" |
||
compose_color = lambda bg, fg: int( |
compose_color = lambda bg, fg: int(round(alpha * fg + (1-alpha) * bg)) |
||
c = compose_color(img.getpixel(xy), color, alpha) |
c = compose_color(img.getpixel(xy), color, alpha) |
||
img.putpixel(xy, c) |
img.putpixel(xy, c) |
||