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Answers and rating deltas for

What's an efficient way to tell if a bitmap is entirely black?

Author Votes Δ
leonard 15 +4.77
tvanfosson 7 +1.05
Craig Stuntz 5 +0.64
DanoB 2 0.00
Hans Passant 2 -0.30
Stewbob 1 -2.30
FlorinB 1 -1.23
ChristopheD 1 -0.72
Steve Wortham 1 -0.54
Matti Virkkunen 1 -1.47
Last visited: Sep 14, 2014, 5:07:29 AM