glGetActiveSubroutineUniformName - query the name of an active shader subroutine
GLenum shadertype, GLuint index,
GLsizei bufSize, GLsizei *length,
Specifies the name of the program containing the
Specifies the shader stage from which to query for the
subroutine parameter. shadertype must be one of
GL_TESS_EVALUATION_SHADER, GL_GEOMETRY_SHADER or
Specifies the index of the shader subroutine
Specifies the size of the buffer whose address is given
Specifies the address of a variable into which is written
the number of characters copied into name.
Specifies the address of a buffer that will receive the
name of the specified shader subroutine uniform.
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 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
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
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_SUBROUTINE_UNIFORMS.
GL_INVALID_VALUE is generated if program is not the
name of an existing program object.
glGetProgramStage() with argument GL_ACTIVE_SUBROUTINE_UNIFORMS
Copyright © 2010-2014 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/.
Copyright © 2010-2014 Khronos Group.
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