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GLGETUNIFORMSUBROUTI(3G)	 OpenGL Manual	      GLGETUNIFORMSUBROUTI(3G)

NAME
       glGetUniformSubroutine - retrieve the value of a subroutine uniform of
       a given shader stage of the current program

C SPECIFICATION
       void glGetUniformSubroutineuiv(GLenum shadertype, GLint location,
				      GLuint *values);

PARAMETERS
       shadertype
	   Specifies the shader stage from which to query for subroutine
	   uniform index.  shadertype must be one of GL_VERTEX_SHADER,
	   GL_TESS_CONTROL_SHADER, GL_TESS_EVALUATION_SHADER,
	   GL_GEOMETRY_SHADER or GL_FRAGMENT_SHADER.

       location
	   Specifies the location of the subroutine uniform.

       values
	   Specifies the address of a variable to receive the value or values
	   of the subroutine uniform.

DESCRIPTION
       glGetUniformSubroutine retrieves the value of the subroutine uniform at
       location location for shader stage shadertype of the current program.
       location must be less than the value of
       GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS for the shader currently in use
       at shader stage shadertype. The value of the subroutine uniform is
       returned in values.

ERRORS
       GL_INVALID_ENUM is generated if shadertype is not one of the accepted
       values.

       GL_INVALID_VALUE is generated if location is greater than or equal to
       the value of GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS for the shader
       currently in use at shader stage shadertype.

       GL_INVALID_OPERATION is generated if no program is active.

SEE ALSO
       glGetProgram(), glGetActiveSubroutineUniform(),
       glGetActiveSubroutineUniformName(), glGetUniformLocation()

COPYRIGHT
       Copyright © 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			  03/16/2013	      GLGETUNIFORMSUBROUTI(3G)

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