[TOC]

Welcome to Pression, a C++ library for implementing and loading compression and CPU-GPU data transfer plugins.

The API documentation can be found on eyescale.github.io. As with any open source project, the available source code, in particular the unit tests provide a reference for developing applications.

Technical questions can be posted to the Equalizer Developer Mailing List, or directly to [email protected].

Commercial support, custom software development and porting services are available from Eyescale. Please contact [email protected] for further information.

Pression provides the following major features:

• Compression and CPU-GPU transfer plugin handling: pression::Compressor, pression::Decompressor, pression::Downloader, pression::Plugin, pression::PluginRegistry, pression::Uploader
• Detailed @ref Changelog

Pression is a cross-platform library, designed to run on any modern operating system, including all Unix variants and the Windows operating system. It requires a C++11 compiler and uses CMake to create a platform-specific build environment. The following platforms and build environments are tested:

• Linux: Ubuntu 16.04, RHEL 6.8 (Makefile, Ninja)
• Windows: 7 (Visual Studio 2012)
• Mac OS X: 10.9 (Makefile, Ninja)

Building from source is as simple as:

git clone --recursive https://github.com/Eyescale/Pression.git
mkdir Pression/build
cd Pression/build
cmake -GNinja .. -DCLONE_SUBPROJECTS=ON
ninja

They are relative numbers when compared to the RLE compressor and the data compressed. Since both change over time with new compilers, CPUs and tested data, they are a somewhat arbitrary snapshot. Typically, all compressor parameters are updated when a new plugin is added on a representative visualization cluster node at the time. They are determined by running the tests/compressor benchmark which calculates them.