133      *  pixels requested is first processed to ensure that it is divisible  in xf86GTFMode()
137      *  [H PIXELS RND] = ((ROUND([H PIXELS]/[CELL GRAN RND],0))*[CELLGRAN RND])  in xf86GTFMode()
255     /*  15. Find number of pixels in left margin:  in xf86GTFMode()
257      *  [LEFT MARGIN (PIXELS)] = (IF( [MARGINS RQD?]="Y",  in xf86GTFMode()
258      *          (ROUND( ([H PIXELS RND] * [MARGIN%] / 100 /  in xf86GTFMode()
267     /*  16. Find number of pixels in right margin:  in xf86GTFMode()
269      *  [RIGHT MARGIN (PIXELS)] = (IF( [MARGINS RQD?]="Y",  in xf86GTFMode()
270      *          (ROUND( ([H PIXELS RND] * [MARGIN%] / 100 /  in xf86GTFMode()
279     /*  17. Find total number of active pixels in image and left and right  in xf86GTFMode()
282      *  [TOTAL ACTIVE PIXELS] = [H PIXELS RND] + [LEFT MARGIN (PIXELS)] +  in xf86GTFMode()
283      *                          [RIGHT MARGIN (PIXELS)]  in xf86GTFMode()
296     /*  19. Find the number of pixels in the blanking time to the nearest  in xf86GTFMode()
299      *  [H BLANK (PIXELS)] = (ROUND(([TOTAL ACTIVE PIXELS] *  in xf86GTFMode()
311     /*  20. Find total number of pixels:  in xf86GTFMode()
313      *  [TOTAL PIXELS] = [TOTAL ACTIVE PIXELS] + [H BLANK (PIXELS)]  in xf86GTFMode()
320      *  [PIXEL FREQ] = [TOTAL PIXELS] / [H PERIOD]  in xf86GTFMode()
337     /*  17. Find the number of pixels in the horizontal sync period:  in xf86GTFMode()
339      *  [H SYNC (PIXELS)] =(ROUND(([H SYNC%] / 100 * [TOTAL PIXELS] /  in xf86GTFMode()
346     /*  18. Find the number of pixels in the horizontal front porch period:  in xf86GTFMode()
348      *  [H FRONT PORCH (PIXELS)] = ([H BLANK (PIXELS)]/2)-[H SYNC (PIXELS)]  in xf86GTFMode()