if (!format) return;
- /* design units -> fractional pixel */
if (format & xPlacement) glyph_pos.x_offset += font->em_scale_x (get_short (values++));
if (format & yPlacement) glyph_pos.y_offset += font->em_scale_y (get_short (values++));
if (format & xAdvance) glyph_pos.x_advance += font->em_scale_x (get_short (values++));
- if (format & yAdvance) glyph_pos.y_advance += font->em_scale_y (get_short (values++));
+ /* y_advance values grow downward but font-space grows upward, hence negation */
+ if (format & yAdvance) glyph_pos.y_advance -= font->em_scale_y (get_short (values++));
if (!has_device ()) return;
if (x_ppem) glyph_pos.x_advance += (base + get_device (values++)).get_x_delta (font); else values++;
}
if (format & yAdvDevice) {
- if (y_ppem) glyph_pos.y_advance += (base + get_device (values++)).get_y_delta (font); else values++;
+ /* y_advance values grow downward but font-space grows upward, hence negation */
+ if (y_ppem) glyph_pos.y_advance -= (base + get_device (values++)).get_y_delta (font); else values++;
}
}