Systems & hardware
GLSL
GLSL (OpenGL Shading Language) is the high-level shading language for the OpenGL graphics API, used to specify the graphical effects programmatically. GLSL shaders are executed on the GPU to allow for real-time rendering performance. It enables sophisticated effects by controlling the graphics pipeline, allowing for the manipulation of vertices and fragments (pixels) for custom rendering effects.
- Created by
- The Khronos Group
- First appeared
- 2004
- Official resource
- Visit the main website
Your first program
Hello, World!
// A simple GLSL fragment shader that outputs a constant red color
#version 330 core
out vec4 FragColor;
void main()
{
FragColor = vec4(1.0, 0.0, 0.0, 1.0); // RGBA red
}Keep learning
Where to go from here
Use trusted documentation for facts and an AI tutor for personalized explanations.
Official resource
Learn from the source
Continue with the language’s official documentation, project, or standards site.
Open official resourcePersonalize it
Ask your AI tutor
Use a focused prompt covering strengths, tradeoffs, setup, and this first program.
Teach me the basics of GLSL. Use https://code.study/glsl as the starting point. Explain what GLSL is best suited for, when I should not choose it, how to install or try it, and then walk me through its Hello World example step by step.
Content reviewed August 2026 · Start with primary sources and verify version-specific details.