Definition

OpenGL (Open Graphics Library)

Part of the Multimedia and graphics glossary:

OpenGL (Open Graphics Library) is the computer industry's standard application program interface ( API ) for defining 2-D and 3-D graphic images. Prior to OpenGL, any company developing a graphical application typically had to rewrite the graphics part of it for each operating system platform and had to be cognizant of the graphics hardware as well. With OpenGL, an application can create the same effects in any operating system using any OpenGL-adhering graphics adapter.

OpenGL specifies a set of "commands" or immediately executed functions. Each command directs a drawing action or causes special effects. A list of these commands can be created for repetitive effects. OpenGL is independent of the windowing characteristics of each operating system, but provides special "glue" routines for each operating system that enable OpenGL to work in that system's windowing environment. OpenGL comes with a large number of built-in capabilities requestable through the API. These include hidden surface removal, alpha blending (transparency), antialiasing , texture mapping, pixel operations, viewing and modeling transformations, and atmospheric effects (fog, smoke, and haze).

Silicon Graphics, makers of advanced graphics workstation s, initiated the development of OpenGL. Other companies on the industry-wide Architecture Review Board include DEC, Intel, IBM, Microsoft, and Sun Microsystems. There is no cost (other than learning) to developing an application using the OpenGL API. Microsoft offers free downloads of the OpenGL libraries for its Windows systems. Although OpenGL is not itself a development "toolkit," such toolkits are available, including Silicon Graphics object-oriented programming 3D graphics toolkit, Open Inventor.

This was last updated in March 2011
Contributor(s): Matt Gumbel and Greg Yasko
Posted by: Margaret Rouse

Related Terms

Definitions

  • raster graphics

    - Raster graphics are digital images created or captured (for example, by scanning in a photo) as a set of samples of a given space. (WhatIs.com)

  • Mantle

    - Mantle is a low-level 3D graphics application programming interface (API) created by AMD for their graphics processing units (GPUs) based on the Graphics Core Next (GCN) architecture. Mantle incre... (WhatIs.com)

  • tablet (tablet PC)

    - A tablet is a wireless, portable personal computer with a touch screen interface. The tablet form factor is typically smaller than a notebook computer but larger than a smartphone. (SearchMobileComputing.com)

Glossaries

  • Multimedia and graphics

    - Terms related to multimedia, including graphics, animation and video definitions and words and phrases about images and sound.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Ask a Question About OpenGL (Open Graphics Library)Powered by ITKnowledgeExchange.com

Get answers from your peers on your most technical challenges

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.