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glgetactivesubroutineuniformname(3g) [centos man page]

GLGETACTIVESUBROUTIN(3G)					   OpenGL Manual					  GLGETACTIVESUBROUTIN(3G)

NAME

       glGetActiveSubroutineUniformName - query the name of an active shader subroutine uniform

C SPECIFICATION

       void glGetActiveSubroutineUniformName(GLuint program, GLenum shadertype, GLuint index, GLsizei bufsize, GLsizei *length, GLchar *name);

PARAMETERS

       program
	   Specifies the name of the program containing the subroutine.

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

       index
	   Specifies the index of the shader subroutine uniform.

       bufsize
	   Specifies the size of the buffer whose address is given in name.

       length
	   Specifies the address of a variable into which is written the number of characters copied into name.

       name
	   Specifies the address of a buffer that will receive the name of the specified shader subroutine uniform.

DESCRIPTION

       glGetActiveSubroutineUniformName retrieves the name of an active shader subroutine uniform.  program contains the name of the program
       containing the uniform.	shadertype specifies the stage for which which the uniform location, given by index, is valid.	index must be
       between zero and the value of GL_ACTIVE_SUBROUTINE_UNIFORMS minus one for the shader stage.

       The uniform name is returned as a null-terminated string in name. The actual number of characters written into name, excluding the null
       terminator is returned in length. If length is NULL, no length is returned. The maximum number of characters that may be written into name,
       including the null terminator, is specified by bufsize. The length of the longest subroutine uniform name in program and shadertype is
       given by the value of GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH, which can be queried with glGetProgramStage().

ERRORS

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

       GL_INVALID_VALUE is generated if index is greater than or equal to the value of GL_ACTIVE_SUBROUTINES.

       GL_INVALID_VALUE is generated if program is not the name of an existing program object.

ASSOCIATED GETS

       glGetProgramStage() with argument GL_ACTIVE_SUBROUTINE_UNIFORMS

SEE ALSO

       glGetSubroutineIndex(), glGetActiveSubroutineUniform(), glGetProgramStage()

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						  GLGETACTIVESUBROUTIN(3G)

Check Out this Related Man Page

GLGETACTIVESUBROUTIN(3G)					   OpenGL Manual					  GLGETACTIVESUBROUTIN(3G)

NAME

       glGetActiveSubroutineName - query the name of an active shader subroutine

C SPECIFICATION

       void glGetActiveSubroutineName(GLuint program, GLenum shadertype, GLuint index, GLsizei bufsize, GLsizei *length, GLchar *name);

PARAMETERS

       program
	   Specifies the name of the program containing the subroutine.

       shadertype
	   Specifies the shader stage from which to query the subroutine name.

       index
	   Specifies the index of the shader subroutine uniform.

       bufsize
	   Specifies the size of the buffer whose address is given in name.

       length
	   Specifies the address of a variable which is to receive the length of the shader subroutine uniform name.

       name
	   Specifies the address of an array into which the name of the shader subroutine uniform will be written.

DESCRIPTION

       glGetActiveSubroutineName queries the name of an active shader subroutine uniform from the program object given in program.  index
       specifies the index of the shader subroutine uniform within the shader stage given by stage, and must between zero and the value of
       GL_ACTIVE_SUBROUTINES minus one for the shader stage.

       The name of the selected subroutine is returned as a null-terminated string in name. The actual number of characters written into name, not
       including the null-terminator, is is returned in length. If length is NULL, no length is returned. The maximum number of characters that
       may be written into name, including the null-terminator, is given in bufsize.

ERRORS

       GL_INVALID_VALUE is generated if index is greater than or equal to the value of GL_ACTIVE_SUBROUTINES.

       GL_INVALID_VALUE is generated if program is not the name of an existing program object.

ASSOCIATED GETS

       glGetProgramStage() with argument GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH

SEE ALSO

       glGetSubroutineIndex(), glGetActiveSubroutineUniform(), glGetProgramStage()

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						  GLGETACTIVESUBROUTIN(3G)
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