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

[Daniel Plakhotich]

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

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. The result may be several pixels
larger than the actual bitmap, but this is definitely faster than
doing the rendering.

On Sat, Sep 16, 2017 at 8:16 AM, Werner LEMBERG <address@hidden> wrote:
>
>>> Why it says the rendering is necessary for 1-bit bitmaps, but not
>>> 8-bit? Maybe I missed something?
>>
>> Perhaps because hinting is more important when you don’t have
>> anti-aliasing as well.
>
> No, it's not related to hinting.  It's rather dropout control, cf.
>
>   https://www.microsoft.com/typography/TrueTypeScanConversion.mspx
>
> I've added a link to the tutorial.
>
>
>     Werner
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