Signature
Parameters
Variables | Description |
---|---|
program |
The name of a program object whose resources to query.
|
programInterface |
A token identifying the interface within
program
containing the indexed resource.
|
index |
The index of the resource within
programInterface
of
program
.
|
bufSize |
The size of the character array whose address is given by
name
.
|
length |
The address of a variable which will receive the length of the resource name.
|
name |
The address of a character array into which will be written the name of the resource.
|
Description
glGetProgramResourceName
retrieves the name string
assigned to the single active resource with an index of
index
in the interface
programInterface
of program object
program
.
index
must be less than
the number of entries in the active resource list for
programInterface
.
program
must be the name of an existing program object.
programInterface
is the name of the interface within
program
which contains the resource and must be one of the following
values:
- GL_UNIFORM
-
The query is targeted at the set of active uniforms within program .
- GL_UNIFORM_BLOCK
-
The query is targeted at the set of active uniform blocks within program .
- GL_PROGRAM_INPUT
- GL_PROGRAM_OUTPUT
- GL_VERTEX_SUBROUTINE
- GL_TESS_CONTROL_SUBROUTINE
- GL_TESS_EVALUATION_SUBROUTINE
- GL_GEOMETRY_SUBROUTINE
- GL_FRAGMENT_SUBROUTINE
- GL_COMPUTE_SUBROUTINE
-
The query is targeted at the set of active subroutines for the vertex, tessellation control, tessellation evaluation, geometry, fragment and compute shader stages of program , respectively.
- GL_VERTEX_SUBROUTINE_UNIFORM
- GL_TESS_CONTROL_SUBROUTINE_UNIFORM
- GL_TESS_EVALUATION_SUBROUTINE_UNIFORM
- GL_GEOMETRY_SUBROUTINE_UNIFORM
- GL_FRAGMENT_SUBROUTINE_UNIFORM
- GL_COMPUTE_SUBROUTINE_UNIFORM
-
The query is targeted at the set of active subroutine uniform variables used by the vertex, tessellation control, tessellation evaluation, geometry, fragment and compute shader stages of program , respectively.
- GL_TRANSFORM_FEEDBACK_VARYING
-
The query is targeted at the set of output variables from the last non-fragment stage of program that would be captured if transform feedback were active.
- GL_BUFFER_VARIABLE
-
The query is targeted at the set of active buffer variables used by program .
- GL_SHADER_STORAGE_BLOCK
-
The query is targeted at the set of active shader storage blocks used by program .
The name string assigned to the active resource identified by
index
is
returned as a null-terminated string in the character array whose address is given 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
. If the length of the name string
including the null terminator
is greater than
bufSize
, the first
bufSize
-1 characters of the name string will be written to
name
,
followed by a null terminator. If
bufSize
is zero, no error will be
generated but no characters will be written to
name
. The length of the
longest name string for
programInterface
>, including a null terminator,
can be queried by calling
glGetProgramInterface
with a
pname
of
GL_MAX_NAME_LENGTH
.
Errors
GL_INVALID_ENUM
is generated if
programInterface
is not one of the accepted interface types.
GL_INVALID_VALUE
is generated if
progam
is not
the name of an existing program.
GL_INVALID_VALUE
is generated if
index
is greater
than or equal to the number of entries in the active resource list for
programInterface
.
GL_INVALID_ENUM
is generated if
programInterface
is
GL_ATOMIC_COUNTER_BUFFER
or
GL_TRANSFORM_FEEDBACK_BUFFER
, since active atomic
counter and transform feedback buffer resources are not assigned name strings.
Version Support
glGetProgramResourceName |
See Also
Copyright
Copyright
2013-2014 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/
.