Color components +mask

[pacman169]

Good day to all,

I`m stuck with bitmasking and shifting…

Here is some color RGB values stored in a 16-bit value.

RRRR RGGG GGGB BBBB

Then I could use bit masking to retrieve the color components?

What does this code do?

const unsigned short redMask   = 0xF800;
unsigned short lightGray = 0x7BEF;

unsigned short redComponent   = (lightGray & redMask) >> 11;

what does the bitwise and do with the shift? Why 11? I also does not understand that lightGray hexadecimal representation, could`t find it anywhere.

Hope someone can help, thanks in advance

[LB]

Try converting the hexadecimal into binary. For example, green would be 0000011111100000

Also, it is very rare to use an actual 16-bit color representation in this current day and age.

[pacman169]

0x7BEF = 0111101111101111
0XF800 = 1111100000000000

(lightGray & redMask) = 01111000000000000

(lightGray & redMask ) >>11 = 0000000000001111

If I use bitmasking to generate moves for a checker game I could still use C-style arrays to represent the board instead of std::bitset?