Re: [ft-devel] Glyph bitmap size question

[Mark Jackson]

So how come (in my case) it's *more* than the point size ?

I understand that with a descender, the bitmap rows may be bigger than 
the point size, but I thought the point size was the height of a normal 
capital letter (or am I completely wrong !?!).

Does the DPI setting make a difference ?  Should I use 72 or 96dpi 
instead of 100 ?

Mark

Graham Asher wrote:
> Yes - the number of rows is the height of the glyph bitmap in pixels, which
> is usually less than the point size and need never equal it.
>
> Graham
>
>
> -----Original Message-----
> From: address@hidden
> [mailto:address@hidden On
> Behalf Of Mark Jackson
> Sent: 15 November 2007 20:25
> To: address@hidden
> Subject: [ft-devel] Glyph bitmap size question
>
> When I render the letter 'R' (or any other capital letter with no 
> descenders) into a glyph using ...
>
> FT_Set_Char_Size(ftFace, 24 * 64, 0, 100, 0);   // set 24 point size @ 
> 100dpi
> ftSlot = ftFace->glyph;
> FT_Load_Char(ftFace, text[n], FT_LOAD_RENDER);
> nRows = ftSlot->bitmaps.rows;
>
> should I expect nRows to equal the point size, i.e. 24 ?
>
> If not, why not ?  Am I missing some crucial way in which the fonts are 
> rendered ?
>
>

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