Function msAdjustExtent

maputil.c:666–684

** Make sure extent fits image window to be created. Returns cellsize of output image. */

** Make sure extent fits image window to be created. Returns cellsize of output image.
*/
double msAdjustExtent(rectObj *rect, int width, int height)
{
  double cellsize, ox, oy;

  cellsize = MS_MAX(MS_CELLSIZE(rect->minx, rect->maxx, width), MS_CELLSIZE(rect->miny, rect->maxy, height));

  if(cellsize <= 0) /* avoid division by zero errors */
    return(0);

  ox = MS_MAX(((width-1) - (rect->maxx - rect->minx)/cellsize)/2,0); /* these were width-1 and height-1 */
  oy = MS_MAX(((height-1) - (rect->maxy - rect->miny)/cellsize)/2,0);

  rect->minx = rect->minx - ox*cellsize;
  rect->miny = rect->miny - oy*cellsize;
  rect->maxx = rect->maxx + ox*cellsize;
  rect->maxy = rect->maxy + oy*cellsize;

  return(cellsize);
}

/*
** Rect must always contain a portion of bounds. If not, rect is