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GLDISPATCHCOMPUTEIND(3G)	 OpenGL Manual	      GLDISPATCHCOMPUTEIND(3G)

NAME
       glDispatchComputeIndirect - launch one or more compute work groups
       using parameters stored in a buffer

C SPECIFICATION
       void glDispatchComputeIndirect(GLintptr indirect);

PARAMETERS
       indirect
	   The offset into the buffer object currently bound to the
	   GL_DISPATCH_INDIRECT_BUFFER buffer target at which the dispatch
	   parameters are stored.

DESCRIPTION
       glDispatchComputeIndirect launches one or more compute work groups
       using parameters stored in the buffer object currently bound to the
       GL_DISPATCH_INDIRECT_BUFFER target. 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.  indirect contains the offset into the data store of
       the buffer object bound to the GL_DISPATCH_INDIRECT_BUFFER target at
       which the parameters are stored.

       The parameters addressed by indirect are packed a structure, which
       takes the form (in C):

	       typedef	struct {
		   uint	 num_groups_x;
		   uint	 num_groups_y;
		   uint	 num_groups_z;
	       } DispatchIndirectCommand;

       A call to glDispatchComputeIndirect is equivalent, assuming no errors
       are generated, to:

	       cmd = (const DispatchIndirectCommand  *)indirect;
	       glDispatchComputeIndirect(cmd->num_groups_x, cmd->num_groups_y, cmd->num_groups_z);
	       }

       Unlike glDispatchCompute(), no error is generated if any of the
       num_groups_x, num_groups_y or num_groups_z members of the
       DispatchIndirectCommand is larger than the value of
       GL_MAX_COMPUTE_WORK_GROUP_COUNT for the corresponding dimension. In
       such circumstances, behavior is undefined and may lead to application
       termination.

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

       GL_INVALID_VALUE is generated if indirect is less than zero or not a
       multiple of four.

       GL_INVALID_OPERATION is generated if no buffer is bound to the
       GL_DISPATCH_INDIRECT_BUFFER target or if the command would source data
       beyond the end of the buffer object's data store.

ASSOCIATED GETS
       glGet() with argument GL_MAX_COMPUTE_WORK_GROUP_COUNT

SEE ALSO
       glDispatchCompute().

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/.

AUTHORS
       opengl.org

opengl.org			  04/29/2014	      GLDISPATCHCOMPUTEIND(3G)

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