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draw565: Fix bug in the straight line optimization

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Currently the line drawing code does not draw the final pixel of
straight lines. Thus a line from (0, 0) to (10, 10) finishes on a
different pixel to (10, 0) to (10, 10).

Fix this by removing the spurious subtract one from the end point

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>
This commit is contained in:
Daniel Thompson 2020-12-28 14:27:10 +00:00
parent 6d74d4f585
commit 8c1ab85257
1 changed files with 2 additions and 2 deletions
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4
wasp/draw565.py
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@ -395,8 +395,8 @@ class Draw565(object):
if x1 < x0 or y1 < y0: if x1 < x0 or y1 < y0:
x0, x1 = x1, x0 x0, x1 = x1, x0
y0, y1 = y1, y0 y0, y1 = y1, y0
w = width if dx == 0 else (dx + width - 1) w = width if dx == 0 else (dx + width)
h = width if dy == 0 else (-dy + width - 1) h = width if dy == 0 else (-dy + width)
self.fill(color, x0, y0, w, h) self.fill(color, x0, y0, w, h)
return return
while True: while True: