Capabilities

The OpenGL Shading Language (GLSL) is the principal shading language for OpenGL. While, thanks to OpenGL Extensions, there are several shading languages available for use in OpenGL, GLSL (and SPIR-V) are supported directly by OpenGL without extensions. GLSL is a C-style language. The language has undergone a number of version changes, and it shares the deprecation model of OpenGL. GLSL is the standard shader programming language for Khronos APIs such as Vulkan, OpenGL 4.x through optional extensions for different versions of GLSL, and WebGL.