mask-contents-set

Arguments: pixmap x y value

Sets the value of the specified pixel of the mask texture of a pixmap by calling contents-set on the mask texture, and returns the new value. Does nothing and returns nil if the pixmap has no mask texture. See contents-set for more information.

Note that mask-contents-ref is setf'able and it is recommended you use setf and mask-contents-ref rather than this function.

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Created 2019.8.20.