Used as the return value for cairo_region_contains_rectangle().
CAIRO_REGION_OVERLAP_IN
The contents are entirely inside the region
CAIRO_REGION_OVERLAP_OUT
The contents are entirely outside the region
CAIRO_REGION_OVERLAP_PART
The contents are partially inside and
partially outside the region.
Used as the return value for cairo_region_contains_rectangle(). CAIRO_REGION_OVERLAP_IN The contents are entirely inside the region CAIRO_REGION_OVERLAP_OUT The contents are entirely outside the region CAIRO_REGION_OVERLAP_PART The contents are partially inside and partially outside the region.