Function

Vipscall_required_optional

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.

Parameters

operation VipsOperation
 

The operation to execute.
 The data is owned by the caller of the function.
required va_list
 

va_list of required arguments.
optional va_list
 

NULL-terminated va_list of name / value pairs.

Return value

Returns: int
 

0 on success, -1 on error.