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This is optipng-ant-task, an Apache Ant task for optimizing PNG images. Under the hood this task uses (and requires) OptiPNG, see: http://optipng.sourceforge.net/ This Ant task has been tested with the following combination of software: - J2SE 5.0 and Java SE 6 (source code uses Java 5-features) - Ant 1.7.1 - OptiPNG 0.6.3 This software is available under the terms of a BSD-style license, see the accompanied LICENSE file. This task comes as a collection of Java source files that can be built with Ant. To compile the Java classes, run all available unit tests and build the JAR file run: ant Note that this already requires 'optipng' on the PATH. The result will be a JAR file: build/optipng-ant-task.jar If you don't have 'optipng' installed and still want to build the JAR file, just execute: ant jar This will skip the execution of the available unit tests. Example usage of the task in an Ant build file: <taskdef name="optipng" classname="com.pensioenpage.jynx.optipng.OptiPNGTask" classpath="lib/optipng-ant-task.jar" /> <optipng dir="src/htdocs" todir="build/htdocs" /> Although all parameters are optional, the task supports various: process - flag that indicates if the input files should be processed at all; there are 3 possible modes: "yes" - the files must be processed by OptiPNG, if at least one file could not be processed, then this task will fail (alternative is "true"); "no" - the files must not be processed by OptiPNG but must instead just be copied as-is, unchanged (alternative is "false"); "try" - attempt to process all matching file(s), when a file fails to be processed, then copy the original file instead. dir - the source directory, to read PNG image files from, defaults to the project base directory; todir - the destination directory, to write the generated CSS files to, defaults to the source directory; overwrite - when set this flag forces each existing output file to be overwritten, even if it is newer than the respective source file; defaults to 'no'; command - the command to execute, by default the task uses 'optipng'; timeOut - the time-out in milliseconds for executing a single command, defaults to 60000 (meaning 60 seconds); includes - the files in the source directory to include, defaults to all files, although only those that end in '.png' will actually be optimized or copied; excludes - the files to exclude, even if they are matched by the includes; and other parameters inherited from the MatchingTask, see: http://ant.apache.org/manual/dirtasks.html If you want to file a bug report or a feature request, please do so here: http://github.com/znerd/optipng-ant-task/issues This software has been developed by: Ernst de Haan - firstname.lastname@example.org PensioenPage B.V. - https://www.pensioenpage.com/