<!-- ##### SECTION Title ##### -->Graphics Contexts<!-- ##### SECTION Short_Description ##### -->A shared pool of GdkGC objects<!-- ##### SECTION Long_Description ##### --><para>These functions provide access to a shared pool of #GdkGC objects.When a new #GdkGC is needed, gtk_gc_get() is called with the required depth,colormap and #GdkGCValues. If a #GdkGC with the required properties alreadyexists then that is returned. If not, a new #GdkGC is created.When the #GdkGC is no longer needed, gtk_gc_release() should be called.</para><!-- ##### SECTION See_Also ##### --><para></para><!-- ##### SECTION Stability_Level ##### --><!-- ##### FUNCTION gtk_gc_get ##### --><para>Gets a #GdkGC with the given depth, colormap and #GdkGCValues.If a #GdkGC with the given properties already exists then it is returned,otherwise a new #GdkGC is created.The returned #GdkGC should be released with gtk_gc_release() when it is nolonger needed.</para>@depth: the depth of the #GdkGC to create.@colormap: the #GdkColormap (FIXME: I don't know why this is needed).@values: a #GdkGCValues struct containing settings for the #GdkGC.@values_mask: a set of flags indicating which of the fields in @values hasbeen set.@Returns: a #GdkGC.<!-- ##### FUNCTION gtk_gc_release ##### --><para>Releases a #GdkGC allocated using gtk_gc_get().</para>@gc: a #GdkGC.