I just got it working with both TIF or JP2...

The issue was JAI native library:

http://docs.geoserver.org/latest/en/user/production/java.html#install-native-jai-and-imageio-extensions
http://docs.geotools.org/latest/userguide/build/install/jdk.html#java-extensions-optional
https://geoserver.geo-solutions.it/edu/en/install_run/jai_io_install.html

As it was recommended everywhere for production performance I installed it. May I suggest opening an issue against documentation ? If this library cannot handle granule transparency I wouldn't recommend installing it.

Here is how I did the install (If you want to test it yourself Daniele):


JAVA_HOME=$(dirname $(dirname $(readlink -f  /usr/bin/java)))

test -f /tmp/jai.tar.gz || \
  wget http://download.java.net/media/jai/builds/release/1_1_3/jai-1_1_3-lib-linux-amd64.tar.gz -O /tmp/jai.tar.gz

tar xvf /tmp/jai.tar.gz -C ${JAVA_HOME}/lib/ext --no-same-permissions --no-same-owner --strip-components=2 --wildcards '*/lib/*.jar' tar xvf /tmp/jai.tar.gz -C ${JAVA_HOME}/lib/amd64 --no-same-permissions --no-same-owner --strip-components=2 --wildcards '*/lib/*.so'

test -f /tmp/imageio.tar.gz || \
  wget http://download.java.net/media/jai-imageio/builds/release/1.1/jai_imageio-1_1-lib-linux-amd64.tar.gz -O /tmp/imageio.tar.gz

tar xvf /tmp/imageio.tar.gz -C ${JAVA_HOME}/lib/ext --no-same-permissions --no-same-owner --strip-components=2 --wildcards '*/lib/*.jar' tar xvf /tmp/imageio.tar.gz -C ${JAVA_HOME}/lib/amd64 --no-same-permissions --no-same-owner --strip-components=2 --wildcards '*/lib/*.so'

rm -fv /var/lib/tomcat8/webapps/geoserver/WEB-INF/lib/jai_core-*jar
rm -fv /var/lib/tomcat8/webapps/geoserver/WEB-INF/lib/jai_imageio-*.jar
rm -fv /var/lib/tomcat8/webapps/geoserver/WEB-INF/lib/jai_codec-*.jar


Best regards, Adam

(And thanks Daniele !)

On 07/18/2018 12:10 PM, Daniele Romagnoli wrote:
Hello Adam,
I have tried it on master branch.
I didn't test on 2.13.x yet. I can do it in the next days.

Which GeoServer version are you using?

(Note that JPEG compression may introduce additional artifacts so I would not use it without masking available).

Regards,
Daniele

--
Regards,
Daniele Romagnoli
==
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==

Ing. Daniele Romagnoli
Senior Software Engineer

GeoSolutions S.A.S.
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Italy
phone: +39 0584 962313
fax:      +39 0584 1660272

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