Re: Question about GdkColor

[Eduardo M KALINOWSKI <ekalin bol com br>]

yeajchao wrote:

> Hello all
>     I am chinese,I am sorry for my terriblly poor English !
>
>     I have confused about GdkColor
>  
>     In general,the RGB color mode ,the red or green or blue's value is from 0
> to 255
>    But ,the GdkColor ,the value  is from 0 to 65535
>
>   My question is ,how to map (0--255) to (0--65535)
>
>   For example ,i have a general color (245,222,179)
>    map it to GdkColor ,what is the value ?
>  
Let's use some basic maths:

245     x
--- = -----
255   65535

Solving for x, we discover that

x = 245*65535 / 255 = 62965

And that's the value for red. Similar calculations will provide the values for green and blue.

BTW, using hexadecimal base this "conversion" gets simpler. Try for yourself.


-- 
Never trust anybody whose arm is bigger than your leg.

Eduardo M KALINOWSKI
ekalin bol com br
http://move.to/hpkb