PHP-Handbuch: Transform a coordinate

Objektorientierter Stil (method):

public array CairoContext::deviceToUser ( float $x , float $y )

Prozeduraler Stil:

array cairo_device_to_user ( CairoContext $context , float $x , float $y )

Transform a coordinate from device space to user space by multiplying the given point by the inverse of the current transformation matrix (CTM).

context: A valid CairoContext object created with CairoContext::__construct or cairo_create
x: x value of the coordinate
y: y value of the coordinate

An array containing the x and y coordinates in the user-space