The function converts the color specifications in the specified array of structures from their current format to a single target format, using the specified CCC. When the return value is the contents of the color specification array are left unchanged.
The array may contain a mixture of color specification formats (for example, 3 CIE XYZ, 2 CIE Luv, and so on). When the array contains both device-independent and device-dependent color specifications and the target_format argument specifies a device-dependent format (for example, all specifications are converted to CIE XYZ format and then to the target device-dependent format.