| Value | Meaning | 
|---|---|
| vertexGL_VERTEX_SHADER | Vertex shader  | 
| tessControlGL_TESS_CONTROL_SHADER | Tesselation control shader  | 
| tessEvaluationGL_TESS_EVALUATION_SHADER | Tesselation evauluation shader  | 
| geometryGL_GEOMETRY_SHADER | Geometry shader  | 
| fragmentGL_FRAGMENT_SHADER | Fragment shader  | 
| computeGL_COMPUTE_SHADER | Compute shader  |