74 #define V_SYNC_RQD        3     /* width of vsync in lines                   */
142     /*  2. If interlace is requested, the number of vertical lines assumed  in xf86GTFMode()
144      *  the number of vertical lines per field. In either case, the  in xf86GTFMode()
145      *  number of lines is rounded to the nearest integer.  in xf86GTFMode()
147      *  [V LINES RND] = IF([INT RQD?]="y", ROUND([V LINES]/2,0),  in xf86GTFMode()
148      *                                     ROUND([V LINES],0))  in xf86GTFMode()
162     /*  4. Find number of lines in Top margin:  in xf86GTFMode()
164      *  [TOP MARGIN (LINES)] = IF([MARGINS RQD?]="Y",  in xf86GTFMode()
165      *          ROUND(([MARGIN%]/100*[V LINES RND]),0),  in xf86GTFMode()
171     /*  5. Find number of lines in Bottom margin:  in xf86GTFMode()
173      *  [BOT MARGIN (LINES)] = IF([MARGINS RQD?]="Y",  in xf86GTFMode()
174      *          ROUND(([MARGIN%]/100*[V LINES RND]),0),  in xf86GTFMode()
191      *                    ([V LINES RND] + (2*[TOP MARGIN (LINES)]) +  in xf86GTFMode()
199     /*  8. Find the number of lines in V sync + back porch:  in xf86GTFMode()
206     /*  9. Find the number of lines in V back porch alone:  in xf86GTFMode()
216     /*  10. Find the total number of lines in Vertical field period:  in xf86GTFMode()
218      *  [TOTAL V LINES] = [V LINES RND] + [TOP MARGIN (LINES)] +  in xf86GTFMode()
219      *                    [BOT MARGIN (LINES)] + [V SYNC+BP] + [INTERLACE] +  in xf86GTFMode()
228      *  [V FIELD RATE EST] = 1 / [H PERIOD EST] / [TOTAL V LINES] * 1000000  in xf86GTFMode()
242      *  [V FIELD RATE] = 1 / [H PERIOD] / [TOTAL V LINES] * 1000000  in xf86GTFMode()
353     /*  36. Find the number of lines in the odd front porch period:  in xf86GTFMode()
355      *  [V ODD FRONT PORCH(LINES)]=([MIN PORCH RND]+[INTERLACE])  in xf86GTFMode()