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

Just some random thoughts:

• Maybe you could apply a ColorMatrix to the original bitmap (to completely turn it to black). Then compare the result with the original.
• Or create a bitmap of identical size (filled with pure black) and then compare to the original bitmap.