Signature
Parameters
| Variables | Description |
|---|---|
| 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.
Version Support
| glGetUniformSubroutineuiv |
See Also
Copyright
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/
.