Signature
glGetProgramResourceLocationIndex(
GLuint (
program
)
,
GLenum (
programInterface
)
,
const char * (
name
)
)-> GLint
Parameters
| Variables | Description |
|---|---|
| program |
The name of a program object whose resources to query.
|
| programInterface | |
| name |
The name of the resource to query the location of.
|
Description
glGetProgramResourceLocationIndex
returns the fragment color index assigned
to the variable named
name
in interface
programInterface
of program
object
program
.
program
must be the name of a program that has been
linked successfully.
programInterface
must
be
GL_PROGRAM_OUTPUT
.
The value -1 will be returned if an error occurs, if
name
does not identify an active variable on
programInterface
, or if
name
identifies an active variable that does
not have a valid location assigned, as described above. The locations
returned by these commands are the same locations returned when querying
the
GL_LOCATION
and
GL_LOCATION_INDEX
resource properties.
A string provided to
glGetProgramResourceLocationIndex
is considered to match an active variable if:
the string exactly matches the name of the active variable
if the string identifies the base name of an active array, where the
string would exactly match the name of the variable if the suffix
"[0]" were appended to the string
if the string identifies an active element of the array, where the
string ends with the concatenation of the "[" character, an integer
with no "+" sign, extra leading zeroes, or whitespace
identifying an
array element, and the "]" character, the integer is less than the
number of active elements of the array variable, and where the string
would exactly match the enumerated name of the array if the decimal
integer were replaced with zero.
Any other string is considered not to identify an active variable. If the
string specifies an element of an array variable,
glGetProgramResourceLocation
returns the
location assigned to that element. If it
specifies the base name of an array, it identifies the resources
associated with the first element of the array.
Errors
GL_INVALID_VALUE
is generated if
program
is not the name of an existing program object.
GL_INVALID_ENUM
is generated if
programInterface
is not one of the accepted interface types.
GL_INVALID_OPERATION
is generated if
program
has not been linked successfully.
Version Support
| glGetProgramResourceLocationIndex |
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/
.