GpInterpolationMode enumeration

Specifies the algorithm that is used when images are scaled or rotated.

The setting is the InterpolationMode property of Graphics. The first four members have the values of GpQualityMode.

Note

GDI+ replaces some of the values when they are set. A Graphics object that was given InterpolationModeHighQuality returns InterpolationModeHighQualityBicubic when the property is read again, and one that was given InterpolationModeLowQuality or InterpolationModeDefault returns InterpolationModeBilinear.

Member Value Description
InterpolationModeInvalid -1 Used internally.
InterpolationModeDefault 0 The default mode.
InterpolationModeLowQuality 1 A low-quality mode.
InterpolationModeHighQuality 2 A high-quality mode.
InterpolationModeBilinear 3 Bilinear interpolation, with no prefiltering. It is not suitable for shrinking an image below 50 percent of its original size.
InterpolationModeBicubic 4 Bicubic interpolation, with no prefiltering. It is not suitable for shrinking an image below 25 percent of its original size.
InterpolationModeNearestNeighbor 5 Nearest-neighbour interpolation.
InterpolationModeHighQualityBilinear 6 High-quality bilinear interpolation. Prefiltering ensures high-quality shrinking.
InterpolationModeHighQualityBicubic 7 High-quality bicubic interpolation. Prefiltering ensures high-quality shrinking. This mode gives the highest quality of the transformed images.

Used by

Example 

Dim user As GdiPlusUser = GdiPlusUser()
Dim bmp As Bitmap = Bitmap(8!, 8!)
Dim g As Graphics = Graphics(bmp)

g.InterpolationMode = InterpolationModeHighQuality
Debug.Print g.InterpolationMode = InterpolationModeHighQualityBicubic
g.InterpolationMode = InterpolationModeLowQuality
Debug.Print g.InterpolationMode = InterpolationModeBilinear
g.InterpolationMode = InterpolationModeNearestNeighbor
Debug.Print g.InterpolationMode = InterpolationModeNearestNeighbor
' Output:
' True
' True
' True

See Also