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mrmrcoleman

Extracting/Setting alpha bits in a DWORD...

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I have a DWORD which represents the colour if my particles, including their alpha. I need to be able to extract the alpha and set it independently of the rest, what is the best way to do this? The DWORD layout is like this... RRGGBBAA Thanks in advance. Mark Coleman

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typedef unsigned char byte_t;
const DWORD AlphaMask = 0xFF;
inline byte_t GetAlpha(DWORD c){ return c & AlphaMask;}
inline void SetAlpha(DWORD &c, byte_t a){ (c &= ~AlphaMask) |= a;}

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