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TICKIT_RECT_SUBTRACT(3) Library Functions Manual TICKIT_RECT_SUBTRACT(3) NAME tickit_rect_subtract - obtain the difference of two rectangles SYNOPSIS #include <tickit.h> int tickit_rect_subtract(TickitRect dst[4], const TickitRect *orig, const TickitRect *hole); Link with -ltickit. DESCRIPTION tickit_rect_subtract() initialises the rectangle structures given by dst (which must be an array capable of containing at least four rectan- gle structures) with a set of non-overlapping rectangles covering the same area as that given by orig without covering hole. Depending on the geometry of the given rectangles it will create from zero to four re- sultant rectangles. It returns the number of rectangular regions ini- tialised into the result array. If hole completely covers orig then the result will contain no rectan- gles. If they do not intersect then just orig will be returned. Other- wise, the result will contain non-overlapping horizontal stripes of orig without hole. RETURN VALUE tickit_rect_subtract() returns the number of rectangles written to dst. SEE ALSO tickit_rect_init_sized(3), tickit_rect_init_bounded(3), tickit_rect_in- tersect(3), tickit_rect_add(3), tickit_rect(7), tickit(7) TICKIT_RECT_SUBTRACT(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO
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