On macOS, GlyphMetrics advance provides only the x-component of the advance, not the y-component. This is usually not an issue, since most text does not have any y-component advance. However, if the font is rotated, this does cause issues.

This bug was discovered during fixing of the manual test "java/awt/print/PrinterJob/PrintTextTest.java" (this test is intended to test printing, but this bug was actually causing the GlyphVectors on page 8 to be drawn incorrectly on screen, not just on paper).