Signature
Parameters
| Variables | Description |
|---|---|
| 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
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
Version Support
| glGetActiveSubroutineName |
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/
.