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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.
Standard Portable Intermediate Representation (SPIR) is an intermediate language for parallel computing and graphics by Khronos Group.It is used in multiple execution environments, including the Vulkan graphics API and the OpenCL compute API, to represent a shader or kernel.
Cg (short for C for Graphics) and High-Level Shader Language (HLSL) are two names given to a high-level shading language developed by Nvidia and Microsoft for programming shaders. Cg/HLSL is based on the C programming language and although they share the same core syntax, some features of C were modified and new data types were added to make Cg ...
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.
However, support on the PC was experimental and unstable [12] until the release of Left 4 Dead. [13] Multiprocessor support was later backported to Team Fortress 2 and Day of Defeat: Source. [14] Valve created the Xbox 360 release of The Orange Box in-house, and support for the console is fully integrated into the main engine codeline.
They may be specified by a separate programming language such as "OpenCL C" (managed by the OpenCL API), as "compute shaders" written in a shading language (managed by a graphics API such as OpenGL), or embedded directly in application code written in a high level language, as in the case of C++AMP. Microsoft support this as DirectCompute.
Tessellation can also be used for implementing subdivision surfaces, level of detail scaling and fine displacement mapping. [5] OpenGL 4.0 uses a similar pipeline, where tessellation into triangles is controlled by the Tessellation Control Shader and a set of four tessellation parameters. [6]
A procedural image made in Shadertoy with distance fields, modeled, shaded, lit and rendered in realtime. Shadertoy is an online community and platform for computer graphics professionals, academics [1] and enthusiasts who share, learn and experiment with rendering techniques and procedural art through GLSL code.