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OpenFX (OFX), a.k.a The OFX Image Effect Plug-in API, is an open standard for 2D visual effects or compositing plug-ins. It allows plug-ins written to the standard to work on any application that supports the standard. The OpenFX standard is owned by The Open Effects Association, and it is released under a 'BSD' open source license. OpenFX was originally designed by Bruno Nicoletti at The Foundry Visionmongers. Plug-ins are written as dynamic shared objects, and the API specifies a few entry points that must be implemented by the plug-in. The OpenFX host exposes sets of entry points to the plugin, called ''suites''. The ''Property Suite'' is used to manage attribute-value pairs attached to objects defined by all other suites of the API, the ''Image Effect Suite'' is used to fetch film frames from the inputs or the output of the effect, and there are other suites to display informative messages or ask questions to the user, handle multithreading, use OpenGL for processing, etc. Each plugin is described by a list of parameters and supported inputs and output. The host may execute various ''actions'', for example to signal that a parameter value has changed or that a portion of a film frame has to be rendered. Optionally, the plugin may also display graphical information over the current frame using OpenGL, and propose interactions using mouse and keyboard (this is called ''interacts'' in the OFX specification). An OpenFX ''host'' is an application capable of loading and executing OpenFX plugins. ==History== The OpenFX specification was written so that a plugin supporting the latest version of the API may be implemented to be compatible with a host implementing an earlier version. # OpenFX 1.0〔(【引用サイトリンク】url=http://openfx.sourceforge.net/Documentation/1.0/ofxProgrammingReference.html )〕 was released in 2006. # OpenFX 1.1〔(【引用サイトリンク】url=http://openfx.sourceforge.net/Documentation/1.1/ofxProgrammingReference.html )〕 was released in 2007. # OpenFX 1.2〔(【引用サイトリンク】url=http://openfx.sourceforge.net/Documentation/1.2/ofxProgrammingReference.html )〕 was released in 2010. # OpenFX 1.3〔(【引用サイトリンク】url=http://openfx.sourceforge.net/Documentation/1.3/ofxProgrammingReference.html )〕 was released in 2012. # OpenFX 1.4〔(【引用サイトリンク】url=http://openeffects.org/news_items/the-open-effects-association-releases-version-1-4 )〕 was released in 2015. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「OpenFX (API)」の詳細全文を読む スポンサード リンク
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