203 static void F1(DFData* curr, int width) {  in F1()  argument
205     DFData* check = curr - width-1;  in F1()
208     if (distSq < curr->fDistSq) {  in F1()
211         curr->fDistSq = distSq;  in F1()
212         curr->fDistVector = distVec;  in F1()
216     check = curr - width;  in F1()
219     if (distSq < curr->fDistSq) {  in F1()
221         curr->fDistSq = distSq;  in F1()
222         curr->fDistVector = distVec;  in F1()
226     check = curr - width+1;  in F1()
229     if (distSq < curr->fDistSq) {  in F1()
232         curr->fDistSq = distSq;  in F1()
233         curr->fDistVector = distVec;  in F1()
237     check = curr - 1;  in F1()
240     if (distSq < curr->fDistSq) {  in F1()
242         curr->fDistSq = distSq;  in F1()
243         curr->fDistVector = distVec;  in F1()
249 static void F2(DFData* curr, int width) {  in F2()  argument
251     DFData* check = curr + 1;  in F2()
254     if (distSq < curr->fDistSq) {  in F2()
256         curr->fDistSq = distSq;  in F2()
257         curr->fDistVector = distVec;  in F2()
263 static void B1(DFData* curr, int width) {  in B1()  argument
265     DFData* check = curr - 1;  in B1()
268     if (distSq < curr->fDistSq) {  in B1()
270         curr->fDistSq = distSq;  in B1()
271         curr->fDistVector = distVec;  in B1()
277 static void B2(DFData* curr, int width) {  in B2()  argument
279     DFData* check = curr + 1;  in B2()
282     if (distSq < curr->fDistSq) {  in B2()
284         curr->fDistSq = distSq;  in B2()
285         curr->fDistVector = distVec;  in B2()
289     check = curr + width-1;  in B2()
292     if (distSq < curr->fDistSq) {  in B2()
295         curr->fDistSq = distSq;  in B2()
296         curr->fDistVector = distVec;  in B2()
300     check = curr + width;  in B2()
303     if (distSq < curr->fDistSq) {  in B2()
305         curr->fDistSq = distSq;  in B2()
306         curr->fDistVector = distVec;  in B2()
310     check = curr + width+1;  in B2()
313     if (distSq < curr->fDistSq) {  in B2()
316         curr->fDistSq = distSq;  in B2()
317         curr->fDistVector = distVec;  in B2()