(gobject:define-genum "GdkInterpType" pixbuf-interp-type
  (:export t
   :type-initializer "gdk_interp_type_get_type")
  (:nearest 0)
  (:tiles 0)
  (:bilinear 0)
  (:hyper 0))  

:nearest

Nearest neighbor sampling: This is the fastest and lowest quality mode. Quality is normally unacceptable when scaling down, but may be fine when scaling up.

:tiles

This is an accurate simulation of the PostScript image operator without any interpolation enabled. Each pixel is rendered as a tiny parallelogram of solid color, the edges of which are implemented with antialiasing. It resembles nearest neighbor for enlargement, and bilinear for reduction.

:bilinear

Bilinear interpolation: Best quality/speed balance. Use this mode by default. For enlargement, it is equivalent to point-sampling the ideal bilinear-interpolated image. For reduction, it is equivalent to laying down small tiles and integrating over the coverage area.

:hyper

This is the slowest and highest quality reconstruction function. It is derived from the hyperbolic filters in Wolberg's "Digital Image Warping", and is formally defined as the hyperbolic-filter sampling the ideal hyperbolic-filter interpolated image. The filter is designed to be idempotent for 1:1 pixel mapping. Deprecated: This interpolation filter is deprecated since 2.38, as in reality it has a lower quality than the :bilinear filter.