Re: [ft-devel] Fetching bitmap strike size from GlyphSlot

[Behdad Esfahbod]

On 12-12-21 05:15 PM, Behdad Esfahbod wrote:
> On 12-12-21 04:18 PM, Werner LEMBERG wrote:
>>>> FreeType doesn't return a 16ppem glyph image at 80ppem for a bitmap
>>>> font; this rather causes an error.
>>>
>>> Really?  Even with SFNT-based bitmap-only fonts?  That's definitely
>>> not what I'm observing.
>>
>> *Blush* Oh!  Sounds like a bug.  Please send me a sample font.
> 
> Really?  I'm not sure we are talking about the same thing...

Ok, looks like I'm fairly confused.  I'll go figure this out and report back.

behdad

>>>> Perhaps something like this untested code?
>>>
>>> Right.  That's what I was afraid of.  It's so hard planting that
>>> logic into a code otherwise using FreeType to load glyphs.  To
>>> contrast, all I need is a function to return the chosen strike.
>>
>> It's not completely clear to me what you *exactly* want.  Can you give
>> more details?
>>
>> An please have a look at function `FT_Match_Size' in `ftobjs.c'.  Does
>> this (or some similar code) fits your needs?  It should be
>> straightforward to add it to the public API.
> 
> Right.  So, the above is not a bug.  cairo, pango, harfbuzz, etc all use
> FT_Set_Char_Size(), which does the size matching.  All I need to is to make
> the result available.
> 
> Humm.  In fact, I now noticed that I probably can use the returned x_ppem /
> y_ppem to compare to my request and scale accordingly.  I think you just
> solved my problem!
> 
> Cheers,
> behdad
> 
>>     Werner
>>
> 

-- 
behdad
http://behdad.org/