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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:
OpenGL 4.0 was released alongside version 3.3. It was designed for hardware able to support Direct3D 11. As in OpenGL 3.0, this version of OpenGL contains a high number of fairly inconsequential extensions, designed to thoroughly expose the abilities of Direct3D 11-class hardware. Only the most influential extensions are listed below.
This use of the term "shader" was introduced to the public by Pixar with version 3.0 of their RenderMan Interface Specification, originally published in May 1988. [2]As graphics processing units evolved, major graphics software libraries such as OpenGL and Direct3D began to support shaders.
The unified shader model uses the same hardware resources for both vertex and fragment processing. In the field of 3D computer graphics, the unified shader model (known in Direct3D 10 as "Shader Model 4.0") refers to a form of shader hardware in a graphical processing unit (GPU) where all of the shader stages in the rendering pipeline (geometry, vertex, pixel, etc.) have the same capabilities.
It is backwards compatible with OpenGL ES 2.0, and partially compatible with WebGL 2.0, [15] as WebGL 2.0 was designed to have a high degree of interoperability with OpenGL ES 3.0. [16] The current version of the OpenGL ES 3.0 standard is 3.0.6, released in November 2019. [17] New functionality in the OpenGL ES 3.0 specification includes:
It is a default backend for both Google Chrome and Mozilla Firefox on Windows platforms and works by translating WebGL and OpenGL calls to available platform-specific APIs. ANGLE currently provides access to OpenGL ES 2.0 and 3.0 to desktop OpenGL, OpenGL ES, Direct3D 9, and Direct3D 11 APIs. [17] ″
The shader assembly language in Direct3D 8 and 9 is the main programming language for vertex and pixel shaders in Shader Model 1.0/1.1, 2.0, and 3.0. It is a direct representation of the intermediate shader bytecode which is passed to the graphics driver for execution.
Vulkan 1.0 and OpenGL 4.5 possible for GCN with Driver Update FirePro equal to Radeon Crimson 16.3 or higher. [47] OpenGL 4.5 was only in Windows available. [48] Actual Linux Driver support OpenGL 4.5 and Vulkan 1.0, but only OpenCL 1.2 by AMDGPU Driver 16.60. [61] Vulkan 1.1 possible for GCN with Radeon Pro Software 18.Q1.1 or higher.