# GLAPI/glDispatchCompute

Core in version | 4.5 | |
---|---|---|

Core since version | 4.3 | |

Core ARB extension | ARB_compute_shader |

**glDispatchCompute:** launch one or more compute work groups

## Function Definition

voidglDispatchCompute(GLuint num_groups_x, GLuint num_groups_y, GLuint num_groups_z);

- num_groups_x
- The number of work groups to be launched in the X dimension.
- num_groups_y
- The number of work groups to be launched in the Y dimension.
- num_groups_z
- The number of work groups to be launched in the Z dimension.

## Description

**glDispatchCompute** launches one or more compute work groups. Each work group is processed by the active program object for the compute shader stage. While the individual shader invocations within a work group are executed as a unit, work groups are executed completely independently and in unspecified order. num_groups_x, num_groups_y and num_groups_z specify the number of local work groups that will be dispatched in the X, Y and Z dimensions, respectively.

## Errors

GL_INVALID_OPERATION is generated if there is no active program for the compute shader stage.

GL_INVALID_VALUE is generated if any of num_groups_x, num_groups_y, or num_groups_z is greater than or equal to the maximum work-group count for the corresponding dimension.

## Associated Gets

glGet with argument GL_MAX_COMPUTE_WORK_GROUP_COUNT

## See Also

## Copyright

Copyright © 2012 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/.