36 static inline void PetscImageDrawLine(PetscImage img, int x_1, int y_1, int x_2, int y_2, int c)  in PetscImageDrawLine()  argument
38   if (y_1 == y_2) {  in PetscImageDrawLine()
48     if (y_2 - y_1 < 0) {  in PetscImageDrawLine()
50       y_1     = y_2;  in PetscImageDrawLine()
51       y_2     = tmp;  in PetscImageDrawLine()
53     while (y_1 <= y_2) PetscImageDrawPixel(img, x_1, y_1++, c);  in PetscImageDrawLine()
57     int dy = PetscAbs(y_2 - y_1), sy = (y_2 - y_1) >= 0 ? +1 : -1;  in PetscImageDrawLine()
61       if (x_1 == x_2 && y_1 == y_2) break;  in PetscImageDrawLine()
108 …cImageDrawTriangle(PetscImage img, int x_1, int y_1, int t_1, int x_2, int y_2, int t_2, int x_3, …  in PetscImageDrawTriangle()  argument
120   if (y_1 < ymin && y_2 < ymin && y_3 < ymin) return;  in PetscImageDrawTriangle()
122   if (y_1 > ymax && y_2 > ymax && y_3 > ymax) return;  in PetscImageDrawTriangle()
136   if (y_1 > y_2) {  in PetscImageDrawTriangle()
138     SWAP(y_1, y_2);  in PetscImageDrawTriangle()
146   if (y_2 > y_3) {  in PetscImageDrawTriangle()
148     SWAP(y_2, y_3);  in PetscImageDrawTriangle()
158   R_y2_y1 = (y_2 != y_1) ? one / ((float)(y_2 - y_1)) : 0;  in PetscImageDrawTriangle()
163   for (y = y_1; y <= y_2; y++) {  in PetscImageDrawTriangle()
194   if (y_2 >= y_3) return;  in PetscImageDrawTriangle()
195   if (y_1 < y_2) {  in PetscImageDrawTriangle()
197     y_1   = y_2;  in PetscImageDrawTriangle()
203   R_y3_y2 = (y_3 != y_2) ? one / ((float)(y_3 - y_2)) : 0;  in PetscImageDrawTriangle()
207   for (y = y_2; y <= y_3; y++) {  in PetscImageDrawTriangle()
210     lfrac = ((float)(y - y_2)) * R_y3_y2;  in PetscImageDrawTriangle()