## Name

gl_WorkGroupSize — contains the size of the workgroup operated on by a compute shader

## Declaration

`const uvec3 gl_WorkGroupSize ;`

## Description

In the compute language, `gl_WorkGroupSize` contains the size of a workgroup declared by a compute shader. The size of the work group in the X, Y, and Z dimensions is stored in the x, y, and z components of `gl_WorkGroupSize`. The values stored in `gl_WorkGroupSize` match those specified in the required `local_size_x`, `local_size_y`, and `local_size_z` layout qualifiers for the current shader. This value is constant so that it can be used to size arrays of memory that can be shared within the local work group.

## Version Support

| OpenGL Shading Language Version
--- | ---
Variable Name | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50
gl_WorkGroupSize | - | - | - | - | - | - | - | - | - | ✔ | ✔ | ✔

## See Also

gl_NumWorkGroups, gl_WorkGroupID, gl_LocalInvocationID

## Copyright

Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.