RE: How to use the GdkColor.pixel

[Owen Taylor <otaylor redhat com>]

On Thu, 2003-12-11 at 12:14, Tom Liu wrote:
> Thanks!, I understand now. 
>
> But, how to get the rgb value of a allocated color? In my application, I
> allocated a lot of color when I start program, should I use RGB value?

I'd just use RGB values and let GTK+ worry about allocating them,
normally. (gdk_colormap_query_color() can be used to find the RGB
of an allocated color.)

> How about for performance?  Every time to use GdkColor in GTK+,
> internally it need to go alloc the color, will this slow down?

On any modern display (TrueColor), gdk_colormap_alloc_color() 
is really fast - it's just a few bitshifts.

But even on older pseudo-color displays, letting GTK+ allocate
the color will generally be quite fast enough ... if the color is
already in use, it can find it without having to ask the X server to
allocate a new color.

Regards,
                                        Owen