Re: Dynamic arrays

["Derold" <bro1@pmt.org>]

You have two options if you're programming windows.  Either query windows
for the current mode or force it to the mode you want.  In dos you set your
own mode so you know from the start what the bit color is or if you have
options for the user you know all the choices and can work from there.

Derold

----- Original Message -----
From: <dakline@vassar.edu>
To: <gameprogrammer@gameprogrammer.com>
Sent: Sunday, September 24, 2000 2:23 PM
Subject: Re: Dynamic arrays


> That makes more sense. How are all higher bit colors mapped? And how do ou
> determine what bit color you are in?
>
> >For colors it depends on the way the actual bits in the frame buffer are
> >interpreted by the hardware. Usually some number of bits are allocated
> >for each of RGB. For example, if the machine supports 24 bit color then
> >there are 8 bits for each of read, green, and blue. The value range for
> >an 8 bit number is 0-255. When a color is specified as a float between 0
> >and 1 then the color value is mapped from the range 0.0-1.0 to 0-255.
> >That means that if you specify a color value of 0 then the bits get set
> >to zero and if you specify a color value of 1.0 the bits get set to 255.
> >If you are using 15 bit color then each of red, green, and blue get 5
> >bits.
> >
> >Who ever told you that is not very well informed.
> >
> > Bob P.
> >
> >dakline@vassar.edu wrote:
> >>
> >> >OpenGL uses integers for their color.  It's operators are overloaded
so it
> >> >can take nearly any value but behind the scene they are all converted
to
> >> >integers for their functions.
> >> >
> >> What are the ranges for these integers? I thought rgb values went from
0-1,
> >> which makes for very simple colors if you can only use integers.
> >>
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