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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.
ARB assembly language, a low-level shading language; Cg, a high-level shading language for programming vertex and pixel shaders; HLSL, a high-level shading language for use with Direct3D and SPIR-V; TGSI, a low-level intermediate language introduced by Gallium3D; AMDIL, a low-level intermediate language used internally at AMD; RenderMan Shading ...
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]
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 ...
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.
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]
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.
This shader works by replacing all light areas of the image with white, and all dark areas with a brightly colored texture. In computer graphics, a shader is a computer program that calculates the appropriate levels of light, darkness, and color during the rendering of a 3D scene—a process known as shading.