gl_GlobalInvocationID - contains the global index of work item currently being operated on by a compute

       Copyright © 2012-2014 Khronos Group

[FIXME: source]                                    11/18/2024                           GL_GLOBALINVOCATIONI(3G)

       in uvec3 gl_GlobalInvocationID ;.SH "DESCRIPTION"

       In the compute language, gl_GlobalInvocationID is a derived input variable containing the n-dimensional
       index of the work invocation within the global work group that the current shader is executing on. The
       value of gl_GlobalInvocationID is equal to gl_WorkGroupID * gl_WorkGroupSize + gl_LocalInvocationID.

       gl_GlobalInvocationID - contains the global index of work item currently being operated on by a compute
       shader

gl_NumWorkGroups(), gl_WorkGroupID(), gl_WorkGroupSize(), gl_LocalInvocationID()

       ┌───────────────────────┬───────────────────────────────────────────────────────────────────────────────────┐
       │                       │        OpenGLShadingLanguageVersion                                            │
       ├───────────────────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┤
       │ Variable              │ 1.10 │ 1.20 │ 1.30 │ 1.40 │ 1.50 │ 3.30 │ 4.00 │ 4.10 │ 4.20 │ 4.30 │ 4.40 │ 4.50 │
       │ Name                  │      │      │      │      │      │      │      │      │      │      │      │      │
       ├───────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │ gl_GlobalInvocationID │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │
       └───────────────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘