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The set of APIs used to compile, link, and pass parameters to GLSL programs are specified in three OpenGL extensions, and became part of core OpenGL as of OpenGL Version 2.0. The API was expanded with geometry shaders in OpenGL 3.2, tessellation shaders in OpenGL 4.0 and compute shaders in OpenGL 4.3. These OpenGL APIs are found in the extensions:
ANGLE, web browsers graphics engine, a cross-platform translator of OpenGL ES calls to DirectX, OpenGL, or Vulkan API calls. Direct3D (a subset of DirectX) Glide a defunct 3D graphics API developed by 3dfx Interactive. Mantle developed by AMD. Metal developed by Apple. OpenGL and the OpenGL Shading Language; OpenGL ES 3D API for embedded devices.
The ARB Vertex Program extension provides APIs to load ARBvp1.0 assembly instructions, enable selected programs, and to set various GPU parameters. Vertex programs are used to modify vertex properties, such as position, normals and texture coordinates, that are passed to the next pipeline process: often a fragment shader; more recently, a ...
It is a direct representation of the intermediate shader bytecode which is passed to the graphics driver for execution. The shader assembly language cannot be directly used to program unified Shader Model 4.0, 4.1, 5.0, and 5.1, although it retains its function as a representation of the intermediate bytecode for debug purposes. [6]
The illumination models listed here attempt to model the perceived brightness of a surface or a component of the brightness in a way that looks realistic. Some take physical aspects into consideration, like for example the Fresnel equations, microfacets, the rendering equation and subsurface scattering.
OpenGL for Embedded Systems (OpenGL ES or GLES) is a subset of the OpenGL computer graphics rendering application programming interface (API) for rendering 2D and 3D computer graphics such as those used by video games, typically hardware-accelerated using a graphics processing unit (GPU). It is designed for embedded systems like smartphones ...
Perl OpenGL (POGL) is a portable, compiled wrapper library that allows OpenGL to be used in the Perl programming language.. POGL provides support for most OpenGL 2.0 extensions, abstracts operating system specific proc handlers, and supports OpenGL Utility Toolkit (GLUT), a simple cross-platform windowing interface.
The OpenGL Utility Library (GLU) is a computer graphics library for OpenGL. It consists of a number of functions that use the base OpenGL library to provide higher-level drawing routines from the more primitive routines that OpenGL provides. It is usually distributed with the base OpenGL package.