<p>A 16.16 fixed-point number used to scale distance expressed in metrics units to device sub-pixels. This is equivalent to ‘face->size->x_scale’, but for metrics only. Optional (parameter can be NULL)</p>
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<p>A 16.16 fixed-point number used to scale distance expressed in metrics units to device sub-pixels. This is equivalent to ‘face->size->x_scale’, but for metrics only. Optional (parameter can be NULL).</p>
<p>This function always return distances in original PFR metrics units. This is unlike <a href="ft2-base_interface.html#FT_Get_Kerning">FT_Get_Kerning</a> with the <a href="ft2-base_interface.html#FT_Kerning_Mode">FT_KERNING_UNSCALED</a> mode, which always returns distances converted to outline units.</p>
<p>You can use the ‘x_scale’ or ‘y_scale’ results of <a href="ft2-pfr_fonts.html#FT_Get_PFR_Metrics">FT_Get_PFR_Metrics</a> to convert the advance to device sub-pixels (i.e., 1/64th of pixels).</p>