FrameBufferClip

Syntax
	int FrameBufferClip(`struct FrameBufferClip` *ptr,int x,int y);
Header
	base/rfbuffer.h
Library
	rfbuf
Description
	The `FrameBufferClip` function tests whether a pixel is inside or outside the clipping polygon. The argument ptr points to the structure containing the clipping polygon and the arguments x and y give the coordinates of the point to test.
Returns
	Returns zero if the pixel lies within the clipping polygon or (1) if it does not. On error, (-1) is returned.
Errors
	On error, (-1) is returned.
Example
	None