Re: [ft] The fastest way to query size of a rendered bitmap

[Werner LEMBERG]

> Am I right that drop-out control can result in a 1-bit bitmap
> smaller (but never bigger) than the 8-bit one?

I don't think so.  Consider a glyph like `)'.  If rendered without
dropout control, you might get

  x
  x

  x
  x

and with dropout control it might be rendered as

  x
  x
   x
  x
  x

which increases the bbox by one pixel.

> The tutorial (3. Coordinates, scaling and grid-fitting) mentions the
> drop-outs and describes the steps to compute an approximate size of
> a bitmap by grid-fitting the bounding box of a glyph.  It seems like
> this is the best solution for my case.

If you apply ceiling for the maximum values and flooring for the
minimum values, this should work, yes.


    Werner