Vips.Image.case (original) (raw)

Method

Vips Imagecase

Declaration [src]


int
vips_case (
  VipsImage* index,
  VipsImage** cases,
  VipsImage** out,
  int n,
  ...
)

Description [src]

Use values in index to select pixels from cases.

index must have one band. cases can have up to 256 elements. Values inindex greater than or equal to n use the final image in cases. The images in cases must have either one band or the same number of bands. The output image is the same size as index. Images in cases are expanded to the smallest common format and number of bands.

Combine this with vips_switch() to make something like a case statement or a multi-way vips_ifthenelse().

This method is not directly available to language bindings.

Parameters

cases

Type: An array of VipsImage*

Array of case images.

The length of the array is specified in the n argument.
The data is owned by the caller of the method.

out

Type: VipsImage

Output image.

The argument will be set by the function.
The caller of the method takes ownership of the returned data, and is responsible for freeing it.

n

Type: int

Number of case images.

...

Type: ``

NULL-terminated list of optional named arguments.

Return value