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

Question

I\'m wondering if there\'s a super-efficient way of confirming that an Image object references an entirely black image, so every pixel within the bitmap is ARGB(255, 0, 0, 0).

Answer 1

One trick that may do it as well is put an indicator pixel somewhere, which always has the same color, unless the image capture fails, in which case everything would be completely black I assume