Method Cairo.Surface()->set_device_offset()

Method set_device_offset

void set_device_offset(float|int x_offset, float|int y_offset)

Description

Sets an offset that is added to the device coordinates determined by the CTM when drawing to surface. One use case for this function is when we want to create a Surface that redirects drawing for a portion of an onscreen surface to an offscreen surface in a way that is completely invisible to the user of the cairo API. Setting a transformation via Context->translate() isn't sufficient to do this, since functions like Context->device_to_user() will expose the hidden offset.

Note that the offset affects drawing to the surface as well as using the surface in a source pattern.

Parameter x_offset

the offset in the X direction, in device units

Parameter y_offset

the offset in the Y direction, in device units