Method
VipsImagecase
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 in
index 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().
See also: vips_maplut(), vips_switch(), 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 nargument.The data is owned by the caller of the method. out-
Type:
VipsImageOutput 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:
intNumber of case images.
...-
Type:
NULL-terminated list of optional named arguments.