C++ - how to convert colour values to RGB

Question

I have the following colour values - 0xFFFF40, 0xFFFF20, 0xff5099.

I want to convert these C++ codes into RGB values, how would I need to go about doing this?

Thanks

Edit: I would basically want to store these values in 3 different unsigned shorts:

unsigned short red;
unsigned short green;
unsigned short blue;

The color value `0xff5099` stands for a red value of `ff`, a green value of `50` and a blue value of `99`, what else do you need? — Oswald, Mar 28 '13 at 22:49
Could you elaborate on how you want them stored when you're done converting and how you have them stored as-is? — 2to1mux, Mar 28 '13 at 22:50
hmm... I didn't know about that. Can I can ask does the '0x' means anything then? — Danny, Mar 28 '13 at 22:51

Dan Lecocq · Accepted Answer · 2013-03-28T22:54:06.287

14

You can get each of the channels by masking them out individually:

// Original color
std::size_t color = 0xFFFF40;
std::size_t red   = (color & 0xff0000) >> 16;
std::size_t green = (color & 0x00ff00) >> 8;
std::size_t blue  = (color & 0x0000ff);

edited Mar 28 '13 at 22:54

answered Mar 28 '13 at 22:48

Dan Lecocq

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2

You'll probably want to shift them too. – Joseph Mansfield Mar 28 '13 at 22:48
Ah, of course! Thanks for catching that! – Dan Lecocq Mar 28 '13 at 22:50
1

Shifting is bits (16/8) not nibbles (4/2). ;) – syam Mar 28 '13 at 22:51
Oh man. Today is just not my day :-/ – Dan Lecocq Mar 28 '13 at 22:52
Double facepalm -- http://ozhouse.org/wp-content/uploads/2012/09/double_facepalm.jpg – Dan Lecocq Mar 28 '13 at 22:54
Let's call it a +1 and be done with it, we all have our downs. ;) – syam Mar 28 '13 at 22:55

C++ - how to convert colour values to RGB

1 Answers1