Question about GdkColor

2006-03-17 Thread yeajchao 
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 ?

  At any time ,your advice for gtk or English is welcome!

   Any help would be much appricated !

 



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Re: Question about GdkColor

2006-03-17 Thread Sven Neumann 
Hi,

yeajchao <[EMAIL PROTECTED]> writes:

> 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)

 r = ((r << 8) | r);
 g = ((g << 8) | g);
 b = ((b << 8) | b);


Sven
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Re: Question about GdkColor

2006-03-17 Thread Toby 
yeajchao wrote:
> My question is how to map (0--255) to (0--65535)

Multiply by 257.


Toby

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