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# ResamplingFilter

A pointer to a resampling filter callback function.

```
typealias ResamplingFilter = UnsafeMutableRawPointer
```

## Discussion

You pass a resampling filter callback to a shear function. The resampling filter pointer can point to a structure that contains a function, rows of precalculated values, flag settings, and so on. The shear function requires that the structure contains a scale factor.

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