double gdk_surface_get_scale ( GdkSurface* surface )
Returns the internal scale that maps from surface coordinates to the actual device pixels.
When the scale is bigger than 1, the windowing system prefers to get buffers with a resolution that is bigger than the surface size (e.g. to show the surface on a high-resolution display, or in a magnifier).
gdk_surface_get_scale_factor(), which returns the
next larger integer.
The scale may change during the lifetime of the surface.
Available since: 4.12