(PECL gmagick >= Unknown)
Gmagick::getimageblueprimary — Returns the chromaticy blue primary point
Returns the chromaticity blue primary point for the image.
x
The chromaticity blue primary x-point.
y
The chromaticity blue primary y-point.
Array consisting of "x" and "y" coordinates of point.
错误时抛出GmagickException.