Hi,

Looking at the 'fpcanvas' unit in FCL it seems we only have the Mitchel Interpolation implemented. Is this a correct assumption?

What about a few other types?
'Box' aka "Nearest Neighbour"
'Triangle' aka "Linear" or "Bilinear"
'Hermite'
'Bell'
'B-Spline'
'Lanczos3'

I have some pascal implementations for the others and if they are not part of FCL already, I can always create a patch to add them. Would this be a worthy effort?

Regards,
- Graeme -

OK, I answered by own question. I found the 'extinterpolation' unit which contains a whole bunch of interpolation filters defined. :-)

Graeme.

Graeme Geldenhuys wrote

Hi, Looking at the 'fpcanvas' unit in FCL it seems we only have the Mitchel Interpolation implemented. Is this a correct assumption?

No. There is a second unit which implements other interpolations: extinterpolation. It registers the following interpolations:

TBlackmanInterpolation = class (TFPBaseInterpolation) TBlackmanSincInterpolation = class (TFPBaseInterpolation) TBlackmanBesselInterpolation = class (TFPBaseInterpolation) TGaussianInterpolation = class (TFPBaseInterpolation) TBoxInterpolation = class (TFPBaseInterpolation)
THermiteInterpolation = class (TFPBaseInterpolation) TLanczosInterpolation = class (TFPBaseInterpolation) TQuadraticInterpolation = class (TFPBaseInterpolation) TCubicInterpolation = class (TFPBaseInterpolation) TCatromInterpolation = class (TFPBaseInterpolation) TBilineairInterpolation = class (TFPBaseInterpolation) THanningInterpolation = class (TFPBaseInterpolation) THammingInterpolation = class (TFPBaseInterpolation)

Absolutely.
Make sure they don't overlap with the currently existing ones. Box and Lanczos seem to be there already.

You can implement them in the same unit btw.

Michael.

Michael.