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GLGETUNIFORMBLOCKIND(3G)		  OpenGL Manual 		 GLGETUNIFORMBLOCKIND(3G)

NAME
       glGetUniformBlockIndex - retrieve the index of a named uniform block

C SPECIFICATION
       GLuint glGetUniformBlockIndex(GLuint program, const GLchar *uniformBlockName);

PARAMETERS
       program
	   Specifies the name of a program containing the uniform block.

       uniformBlockName
	   Specifies the address an array of characters to containing the name of the uniform
	   block whose index to retrieve.

DESCRIPTION
       glGetUniformBlockIndex retrieves the index of a uniform block within program.

       program must be the name of a program object for which the command glLinkProgram() must
       have been called in the past, although it is not required that glLinkProgram() must have
       succeeded. The link could have failed because the number of active uniforms exceeded the
       limit.

       uniformBlockName must contain a nul-terminated string specifying the name of the uniform
       block.

       glGetUniformBlockIndex returns the uniform block index for the uniform block named
       uniformBlockName of program. If uniformBlockName does not identify an active uniform block
       of program, glGetUniformBlockIndex returns the special identifier, GL_INVALID_INDEX.
       Indices of the active uniform blocks of a program are assigned in consecutive order,
       beginning with zero.

ERRORS
       GL_INVALID_OPERATION is generated if program is not the name of a program object for which
       glLinkProgram() has been called in the past.

NOTES
       glGetUniformBlockIndex is available only if the GL version is 3.1 or greater.

SEE ALSO
       glGetActiveUniformBlockName(), glGetActiveUniformBlock(), glLinkProgram()

COPYRIGHT
       Copyright (C) 2010 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				    06/10/2014			 GLGETUNIFORMBLOCKIND(3G)
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