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 gtkGcRelease
when it is no
longer needed.gtkGcGet(depth, colormap, values)
depth
GdkGC
to create.colormap
GdkColormap
(FIXME: I don't know why this is needed).values
GdkGCValues
struct containing settings for the GdkGC
.