22 static int coincident_line(const Cubic& cubic, Cubic& reduction) {  in coincident_line()  argument
23     reduction[0] = reduction[1] = cubic[0];  in coincident_line()
27 static int vertical_line(const Cubic& cubic, ReduceOrder_Styles reduceStyle, Cubic& reduction) {  in vertical_line()  argument
29     reduction[0] = cubic[0];  in vertical_line()
30     reduction[1] = cubic[3];  in vertical_line()
34     int smaller = reduction[1].y > reduction[0].y;  in vertical_line()
39         if (reduction[smaller].y > yExtrema) {  in vertical_line()
40             reduction[smaller].y = yExtrema;  in vertical_line()
43         if (reduction[larger].y < yExtrema) {  in vertical_line()
44             reduction[larger].y = yExtrema;  in vertical_line()
50 static int horizontal_line(const Cubic& cubic, ReduceOrder_Styles reduceStyle, Cubic& reduction) {  in horizontal_line()  argument
52     reduction[0] = cubic[0];  in horizontal_line()
53     reduction[1] = cubic[3];  in horizontal_line()
57     int smaller = reduction[1].x > reduction[0].x;  in horizontal_line()
62         if (reduction[smaller].x > xExtrema) {  in horizontal_line()
63             reduction[smaller].x = xExtrema;  in horizontal_line()
66         if (reduction[larger].x < xExtrema) {  in horizontal_line()
67             reduction[larger].x = xExtrema;  in horizontal_line()
74 static int check_quadratic(const Cubic& cubic, Cubic& reduction) {  in check_quadratic()  argument
87     reduction[0] = cubic[0];  in check_quadratic()
88     reduction[1].x = midX;  in check_quadratic()
89     reduction[1].y = midY;  in check_quadratic()
90     reduction[2] = cubic[3];  in check_quadratic()
95         int minX, int maxX, int minY, int maxY, Cubic& reduction) {  in check_linear()  argument
109     reduction[0] = cubic[0];  in check_linear()
110     reduction[1] = cubic[3];  in check_linear()
153         reduction[replace] = extrema;  in check_linear()
197 int reduceOrder(const Cubic& cubic, Cubic& reduction, ReduceOrder_Quadratics allowQuadratics,  in reduceOrder()  argument
237             return coincident_line(cubic, reduction);  in reduceOrder()
239         return vertical_line(cubic, reduceStyle, reduction);  in reduceOrder()
242         return horizontal_line(cubic, reduceStyle, reduction);  in reduceOrder()
244     int result = check_linear(cubic, reduceStyle, minX, maxX, minY, maxY, reduction);  in reduceOrder()
249             && (result = check_quadratic(cubic, reduction))) {  in reduceOrder()
252     memcpy(reduction, cubic, sizeof(Cubic));  in reduceOrder()