Shader

A Shader is a program designed to run on some stage of a graphics processor. Its purpose is to execute one of the programmable stages of the rendering pipeline.

In OpenGL, shaders are written in GLSL, and are of the following types:

• Vertex Shaders (GL ≥ 2.0)
• Tessellation Control Shaders (GL ≥ 4.0)
• Tessellation Evaluation Shaders (GL ≥ 4.0)
• Geometry Shaders (GL ≥ 3.2)
• Fragment Shaders (GL ≥ 2.0)
• Compute Shaders (GL ≥ 4.3)