Function

Vipscall_required_optional

since: 8.0

Declaration [src] 

int
vips_call_required_optional (
  VipsOperation** operation,
  va_list required,
  va_list optional
)

Description [src]

This is the main entry point for the C and C++ varargs APIs. operation is executed, supplying required and optional arguments.

Beware, this can change operation to point at an old, cached one.

Available since: 8.0

This function is not directly available to language bindings.

Parameters

operation

Type: VipsOperation

The operation to execute.

The data is owned by the caller of the function.
required

Type: va_list

va_list of required arguments.

optional

Type: va_list

NULL-terminated va_list of name / value pairs.

Return value

Type: int

0 on success, -1 on error.