Re: [gdk;gdkpixbuf] Optimisation. Is it possible?

[Owen Taylor <otaylor redhat com>]

On Mon, 2005-07-11 at 09:58 +0200, uzytkownik22 gazeta pl wrote:
> I'd like to create a lot of images from some values.
> Values is in some type of tree (background, what in right upper 
> corner, what in ...).
> Is it possible to reuse GdkGC for enother GdkDrawable then in 
> constructor?
>
> Something like:
>
> G_INLINE GdkGC *return_gc_background1(GdkDrawable *gd) {
>   static GdkGC *gc = NULL;
>   static GdkColor color;
>   if(G_UNLIKLY(!gc)) { //It's used many times but once init.
>     gc = gdk_gc_new(gd);
>     gdk_color_parse("ff0000", &color); //1
>     gdk_gc_set_foreground(gc, &color);
>   }
>   return gc; //What will be happend if enother GdkDrawable
> }

A GdkGC can be used with any drawable with the same depth and
GdkScreen as the one for which is was created.

However, drawing onto a drawable that interprets colors differently
is likely not useful, so you really need the two drawables to have
the same GdkColormap.

Regards,
                                                Owen

P.S.:

 G_INLINE isn't used like that.

 There is no significant value to G_UNLIKELY in this type of code;
   it reduces the readability of your code for a very tiny 
   performance improvement.