What Does a Fragment Shader Do

A Fragment Shader is the Shader stage that will process a Fragment generated by the Rasterization into a set of colors and a single depth value. The fragment shader is the OpenGL pipeline stage after a primitive is rasterized. … Fragment shaders take a single fragment as input and produce a single fragment as output.

What is a fragment in a fragment shader?

A Fragment is a collection of values produced by the Rasterizer. Each fragment represents a sample-sized segment of a rasterized Primitive. … An input fragment, built by the rasterizer, enters the Fragment Shader. After arbitrary processing, the fragment shader writes a number of values.

How often is fragment shader called?

A fragment shader is executed for each fragment once. One fragment is one pixel.