RFR: 8377937: [macos] GlyphMetrics advance does not consider font rotation [v2]

[Daniel Gredler]

> 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 problems.
> 
> 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 `GlyphVector`s on page 8 to be drawn incorrectly on screen, not just on paper).
> 
> `FileFontStrike.getGlyphMetrics( )` was helpful as a guide regarding the expected behavior of `CStrike.getGlyphMetrics( )`.
> 
> Tested on mac, Linux and Windows:
> - make test TEST="jtreg:test/jdk/java/awt/font"
> - make test TEST="jtreg:test/jdk/java/awt/Graphics2D/DrawString"

Daniel Gredler has updated the pull request incrementally with one additional commit since the last revision:

  Add defensive check for null ptr

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/29726/files
  - new: https://git.openjdk.org/jdk/pull/29726/files/8356ec87..600d7c44

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29726&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29726&range=00-01

  Stats: 11 lines in 1 file changed: 3 ins; 1 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/29726.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29726/head:pull/29726

PR: https://git.openjdk.org/jdk/pull/29726