Hi, I am trying to perform a shaping which is independent on a resulting device, so no scaling, no grid-fitting is desired.
In order to disable the grid-fitting and get as high precision as possible I thought it was sufficient to work in the font design precision - to scale the font to some very high value (like the *UpEm* value), i.e. using the following code: * hb_face_t* const face( hb_ft_face_create( ft_face, NULL ) );* * hb_font_t* font = hb_font_create( face );* * unsigned int const upem( hb_face_get_upem (face) );* * hb_font_set_scale( font, upem, upem );* *hb_ft_font_set_funcs( font );* But unfortunately it is not enough. The *hb_ft_get_glyph_h_kerning()*function calls the *FT_Get_Kerning* with kerning mode set to *FT_KERNING_DEFAULT*, and for example for *Arial font* and *'T'* and *'a'* character pair (55 and 68 glyph indices) it returns value -256 (instead of correct value -227). It if the scaling seems correct the function still performs some fitting. If i try to change the kerning mode to FT_KERNING_UNSCALED then I get the correct value (-227) but that is probably not a proper fix but just a hack. Is there an elegant and efficient way to disable both scaling and fitting and perform a device independent full precision shaping? Thank you very much. Kind regards, Petr
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