[OpenJDK 2D-Dev] RFR: 8224109: Text spaced incorrectly by drawString under rotation with fractional metrics

[Sergey Bylokhov]

Look fine.

On 1/10/20 1:33 pm, Philip Race wrote:
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8224109
> Webrev: http://cr.openjdk.java.net/~prr/8224109/
> 
> There have been at least a couple of reports on this problem which manifests
> when using fractional metrics.
> 
> As noted in the bug eval
> - we had the wrong sign for the y advance in this path
> -  the wrong transform component was being used for the rotation.
> 
> The fix is quite small but creating a regression test  was a challenge
> to be able to reliably tell where the rendering landed and if it
> was the same for different APIs and that it goes in an "expected" direction.
> 
> I found one new bug 8236451with a laid out glyphvector which is
> not fixed here because it is a harfbuzz code path problem.
> 
> Also we have known issues with AAT fonts and harfbuzz so  using
> Courier New on mac.
> 
> Not to mention Macos Mojave wants to do AA text even when you
> ask for B&W (bug open on that too) so it is really hard to verify in that case.
> 
> -phil.
> 
> 


-- 
Best regards, Sergey.