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LEARN ABOUT CENTOS
glgetsubroutineindex
GLGETSUBROUTINEINDEX(3G) OpenGL Manual GLGETSUBROUTINEINDEX(3G)
NAME
glGetSubroutineIndex - retrieve the index of a subroutine uniform of a given shader stage within a program
C SPECIFICATION
GLuint glGetSubroutineIndex(GLuint program, GLenum shadertype, const GLchar *name);
PARAMETERS
program
Specifies the name of the program containing shader stage.
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.
name
Specifies the name of the subroutine uniform whose index to query.
DESCRIPTION
glGetSubroutineIndex returns the index of a subroutine uniform within a shader stage attached to a program object. program contains the
name of the program to which the shader is attached. shadertype specifies the stage from which to query shader subroutine index. name
contains the null-terminated name of the subroutine uniform whose name to query.
If name is not the name of a subroutine uniform in the shader stage, GL_INVALID_INDEX is returned, but no error is generated. If name is
the name of a subroutine uniform in the shader stage, a value between zero and the value of GL_ACTIVE_SUBROUTINES minus one will be
returned. Subroutine indices are assigned using consecutive integers in the range from zero to the value of GL_ACTIVE_SUBROUTINES minus one
for the shader stage.
ERRORS
GL_INVALID_ENUM is generated if shadertype or pname is not one of the accepted values.
GL_INVALID_VALUE is generated if program is not the name of an existing program object.
SEE ALSO
glGetProgram(), glGetActiveSubroutineUniform(), glGetActiveSubroutineUniformName()
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 GLGETSUBROUTINEINDEX(3G)