Enumeration

GdkPixbufInterpType

Declaration 

enum GdkPixbuf.InterpType

Description [src]

Interpolation modes for scaling functions.

The GDK_INTERP_NEAREST mode is the fastest scaling method, but has horrible quality when scaling down; GDK_INTERP_BILINEAR is the best choice if you aren’t sure what to choose, it has a good speed/quality balance.

Note: Cubic filtering is missing from the list; hyperbolic interpolation is just as fast and results in higher quality.

Members

GDK_INTERP_NEAREST

Nearest neighbor sampling; this is the fastest and lowest quality mode. Quality is normally unacceptable when scaling down, but may be OK when scaling up.

  • Value: 0
  • Available since: 2.0
GDK_INTERP_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.

  • Value: 1
  • Available since: 2.0
GDK_INTERP_BILINEAR

Best quality/speed balance; use this mode by default. Bilinear interpolation. 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.

  • Value: 2
  • Available since: 2.0
GDK_INTERP_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, as in reality it has a lower quality than the GDK_INTERP_BILINEAR filter (Since: 2.38).

  • Value: 3
  • Available since: 2.0