JDK9 PNG Writer Backport

A backport of the PNG writer performance enhancements implemented in JDK-6488522.

License	GPL 2 + Classpath Exception
Categories	Net
GroupId	net.gredler
ArtifactId	jdk9-png-writer-backport
Last Version	1.0.0
Release Date	May 19, 2016
Type	jar
Description	JDK9 PNG Writer Backport A backport of the PNG writer performance enhancements implemented in JDK-6488522.
Project URL	https://github.com/gredler/jdk9-png-writer-backport
Source Code Management	https://github.com/gredler/jdk9-png-writer-backport

Download jdk9-png-writer-backport

Filename	Size
jdk9-png-writer-backport-1.0.0.pom
jdk9-png-writer-backport-1.0.0.jar	19 KB
jdk9-png-writer-backport-1.0.0-sources.jar	12 KB
jdk9-png-writer-backport-1.0.0-javadoc.jar	23 KB

How to add to project

Apache Maven

<!-- https://jarcasting.com/artifacts/net.gredler/jdk9-png-writer-backport/ -->
<dependency>
    <groupId>net.gredler</groupId>
    <artifactId>jdk9-png-writer-backport</artifactId>
    <version>1.0.0</version>
</dependency>

Gradle Groovy

// https://jarcasting.com/artifacts/net.gredler/jdk9-png-writer-backport/
implementation 'net.gredler:jdk9-png-writer-backport:1.0.0'

Gradle Kotlin

// https://jarcasting.com/artifacts/net.gredler/jdk9-png-writer-backport/
implementation ("net.gredler:jdk9-png-writer-backport:1.0.0")

Apache Buildr

'net.gredler:jdk9-png-writer-backport:jar:1.0.0'

Apache Ivy

<dependency org="net.gredler" name="jdk9-png-writer-backport" rev="1.0.0">
  <artifact name="jdk9-png-writer-backport" type="jar" />
</dependency>

Groovy Grape

@Grapes(
@Grab(group='net.gredler', module='jdk9-png-writer-backport', version='1.0.0')
)

Scala SBT

libraryDependencies += "net.gredler" % "jdk9-png-writer-backport" % "1.0.0"

Leiningen

[net.gredler/jdk9-png-writer-backport "1.0.0"]

Dependencies

test (1)

Group / Artifact	Type	Version
junit : junit	jar	4.12

Project Modules

There are no modules declared in this project.

JDK9 PNG Writer Backport

This is a backport of the standard ImageIO PNG writer available in Java 9, which includes a very important configurability and performance enhancement. This library can be used on both Java 7 and Java 8.

Prior to Java 9, the ZLIB deflater used internally by PNGImageWriter always used the BEST_COMPRESSION compression level, which tries to achieve optimal file sizes regardless of the performance penalty. This behavior was not configurable.

In Java 9, the ZLIB deflater used by PNGImageWriter uses a more sane compression level default (4), and allows the compression level to be customized with the standard ImageWriteParam compression attributes.

This library contains and automatically registers this improved PNG writer with the ImageIO system, directing the ImageIO service registry to prioritize it over the built-in standard PNG writer.

Many thanks to Laurent Bourgès for implementing this Java 9 enhancement to begin with.

###Building

gradlew check: Compiles and runs all quality checks, including the unit tests.
gradlew jar: Builds the JAR file.
gradlew uploadArchives: Deploys to Maven Central (requires a modified gradle.properties file).

Versions

Version
1.0.0 May 19, 2016