Function
VipsImageswitch
Declaration [src]
int
vips_switch (
VipsImage** tests,
VipsImage** out,
int n,
...
)
Description [src]
The tests images are evaluated and at each point the index of the first
non-zero value is written to out. If all tests are false, the value
(n + 1) is written.
Images in tests must have one band. They are expanded to the
bounding box of the set of images in tests, and that size is used for
out. tests can have up to 255 elements.
Combine with vips_case() to make an efficient multi-way vips_ifthenelse().
See also: vips_maplut(), vips_case(), vips_ifthenelse().
This function is not directly available to language bindings.
Parameters
tests-
Type: An array of
VipsImage*Test these images.
The length of the array is specified in the nargument.The data is owned by the caller of the function. out-
Type:
VipsImageOutput index image.
The argument will be set by the function. The caller of the function takes ownership of the returned data, and is responsible for freeing it. n-
Type:
intNumber of input images.
...-
Type:
NULL-terminated list of optional named arguments.