9 static bool rotate(const SkDCubic& cubic, int zero, int index, SkDCubic& rotPath) {  in rotate()  argument
10     double dy = cubic[index].fY - cubic[zero].fY;  in rotate()
11     double dx = cubic[index].fX - cubic[zero].fX;  in rotate()
16         rotPath = cubic;  in rotate()
18             rotPath[index].fY = cubic[zero].fY;  in rotate()
22             if (approximately_equal(cubic[side1].fY, cubic[zero].fY)) {  in rotate()
23                 rotPath[side1].fY = cubic[zero].fY;  in rotate()
25             if (approximately_equal(cubic[side2].fY, cubic[zero].fY)) {  in rotate()
26                 rotPath[side2].fY = cubic[zero].fY;  in rotate()
32         rotPath[index].fX = cubic[index].fX * dx + cubic[index].fY * dy;  in rotate()
33         rotPath[index].fY = cubic[index].fY * dx - cubic[index].fX * dy;  in rotate()