On 4/28/19, 8:25 AM, Peter Harvey wrote:
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From what I can tell, Freetype 2.7 contained a change in hint
processing that led to poorer quality font rendering on Windows. Any
OpenJDK distribution using Freetype 2.7 or higher (ie. most
distributions) will have poorer quality font rendering on Windows. I
may have found a solution to this issue but I am unable to add
comments to the relevant bugs:
https://bugs.openjdk.java.net/browse/JDK-8217731
https://bugs.openjdk.java.net/browse/JDK-8208377
https://bugs.openjdk.java.net/browse/JDK-8214538
As a temporary workaround, users of OpenJDK distributions can force
pre-2.7 font rendering by simply setting an environment variable:
FREETYPE_PROPERTIES=truetype:interpreter-version=35
I've tested this workaround on OpenJDK distributions from Amazon,
Oracle, and AdoptOpenJDK.
Do you mean you specifically tested out exactly the issues & scenarios
listed in the above bug reports and found them all 100% reverted & cured ?
If not, please detail what exactly you see in each case when applying
the property vs previous JDKs.
What version of Windows did you test, and did you test anything other
than Windows ?
Note that AdoptOpenJDK's distribution for Java 8 didn't require the
workaround because it appears to be using Freetype 2.5.3. A quick
Google for "truetype:interpreter-version=35" shows plenty of people in
other open-source communities (eg. Wine, Fedora) which encourage this
workaround for other software.
A more permanent solution would be to change the default build process
for OpenJDK to set "truetype:interpreter-version=35" as the default
when compiling Freetype.
I have read freetype notes on this and it isn't clear whether we want to
go against what it does by default.
And in any case, Oracle JDK switched from T2K to freetype in 11 so there
can be differences due to that too.
It may be that Windows is the only platform on which this reversion is a
good idea.
And in any case, on Linux + Solaris (not sure about other Unix-like
distros) OpenJDK
currently uses the system freetype so a JDK build change for freetype
wouldn't help.
Please let me know if I can assist in any way.
The above requested information ..
-phil.
Regards,
Peter.
--
*Actenum Corporation*
Peter Harvey | Cell: 780.729.8192 | har...@actenum.com
<mailto:har...@actenum.com> | www.actenum.com <http://www.actenum.com>
