Re: [Devel] PCF problem

[Werner LEMBERG]

> With the PCF driver there are problems when the font file does not
> contain the PIXEL_SIZE property which is used for the height.
>
> ...
>
>   if ( bsize->height == 0 )
>     bsize->height =
>       (FT_Short)( ( bsize->size * bsize->y_ppem + 2048 ) / 64 / 64 );
> 
> For example I have a PCF font here with
> 
> no PIXEL_SIZE
> POINT_SIZE 170 (= 17pt)
> RESOLUTION_Y 78
> 
> with above code this results in
> 
> size 1084 (= point size 16.9x)
> y_ppem 1174 (= 18.x ppem)
> height 311 ???
> 
> Is this a problem with the font or the formula?

The formula is bad.  It must be

  bsize->height = (FT_Short)( ( bsize->y_ppem + 32 ) / 64 );

This makes 18 pixels for your font which looks reasonable.

I've fixed this now.  Thanks for the report.


    Werner