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.
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.
|Function / Feature Name||2.0||2.1||3.0||3.1||3.2||3.3||4.0||4.1||4.2||4.3||4.4||
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