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{{fbdoc item="title" value="OpenGL, The Open Graphics Language"}}----
OpenGL is a standardized and widely used cross-platform 3D graphics library.

Usually ""OpenGL"" support comes as part of the system and the graphics drivers. There are many different projects providing a library that implements the main ""OpenGL"" API, and which one is used depends on the platform and system setup. For example, on Windows, the client API is implemented in Microsoft's opengl32.dll, while on Linux, there is for example the free ""Mesa3D"" project, which provides a libGL implementation. It depends on the used library or system setup which way the ""OpenGL"" API does its rendering, typically it uses ""OpenGL"" hardware drivers and is hardware-accelerated, but there also is software-rendered ""OpenGL"" (e.g. standalone ""Mesa3D""). The system's graphics hardware drivers may provide additional ""OpenGL"" extensions, access to which is again system dependant.

Besides plain ""OpenGL"", there are several utility, helper and wrapper libraries, such as [[ExtLibGLUT|GLUT]], [[ExtLibfreeglut|freeglut]] and [[ExtLibGLFW|GLFW]], and even ""FreeBASIC""'s built-in graphics library has an ""OpenGL"" mode, see [[KeyPgScreengraphics|Screen and fb.GFX_OPENGL]].

Websites:
""OpenGL"" standard: http://www.opengl.org
""Mesa3D"": http://mesa3d.org/
Windows ""OpenGL"": http://msdn.microsoft.com/en-us/library/dd374278.aspx

Platforms supported: ""Win32"", Linux
Headers to include: GL/gl.bi
Header version: Mesa-3D 10.5.1, MinGW-w64 3.3.0
Examples: yes, in ""examples/graphics/OpenGL/""

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