Re: Question about GdkColor
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 ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Question about GdkColor
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 [EMAIL PROTECTED] http://move.to/hpkb ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Question about GdkColor
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 ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Re: Question about GdkColor
yeajchao wrote: My question is how to map (0--255) to (0--65535) Multiply by 257. Toby -- Signed/encrypted mail welcome. GPG/PGP Key-Id: 0x15C5C2EA ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
