204 static void F1(DFData* curr, int width) {  in F1()  argument
206     DFData* check = curr - width-1;  in F1()
209     if (distSq < curr->fDistSq) {  in F1()
212         curr->fDistSq = distSq;  in F1()
213         curr->fDistVector = distVec;  in F1()
217     check = curr - width;  in F1()
220     if (distSq < curr->fDistSq) {  in F1()
222         curr->fDistSq = distSq;  in F1()
223         curr->fDistVector = distVec;  in F1()
227     check = curr - width+1;  in F1()
230     if (distSq < curr->fDistSq) {  in F1()
233         curr->fDistSq = distSq;  in F1()
234         curr->fDistVector = distVec;  in F1()
238     check = curr - 1;  in F1()
241     if (distSq < curr->fDistSq) {  in F1()
243         curr->fDistSq = distSq;  in F1()
244         curr->fDistVector = distVec;  in F1()
250 static void F2(DFData* curr, int width) {  in F2()  argument
252     DFData* check = curr + 1;  in F2()
255     if (distSq < curr->fDistSq) {  in F2()
257         curr->fDistSq = distSq;  in F2()
258         curr->fDistVector = distVec;  in F2()
264 static void B1(DFData* curr, int width) {  in B1()  argument
266     DFData* check = curr - 1;  in B1()
269     if (distSq < curr->fDistSq) {  in B1()
271         curr->fDistSq = distSq;  in B1()
272         curr->fDistVector = distVec;  in B1()
278 static void B2(DFData* curr, int width) {  in B2()  argument
280     DFData* check = curr + 1;  in B2()
283     if (distSq < curr->fDistSq) {  in B2()
285         curr->fDistSq = distSq;  in B2()
286         curr->fDistVector = distVec;  in B2()
290     check = curr + width-1;  in B2()
293     if (distSq < curr->fDistSq) {  in B2()
296         curr->fDistSq = distSq;  in B2()
297         curr->fDistVector = distVec;  in B2()
301     check = curr + width;  in B2()
304     if (distSq < curr->fDistSq) {  in B2()
306         curr->fDistSq = distSq;  in B2()
307         curr->fDistVector = distVec;  in B2()
311     check = curr + width+1;  in B2()
314     if (distSq < curr->fDistSq) {  in B2()
317         curr->fDistSq = distSq;  in B2()
318         curr->fDistVector = distVec;  in B2()