'\" t
.\"     Title: glGetProgramResourceIndex
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 01/03/2018
.\"    Manual: [FIXME: manual]
.\"    Source: [FIXME: source]
.\"  Language: English
.\"
.TH "GLGETPROGRAMRESOURCE" "3G" "01/03/2018" "[FIXME: source]" "[FIXME: manual]"
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.SH "NAME"
glGetProgramResourceIndex \- query the index of a named resource within a program
.SH "C SPECIFICATION"
.HP \w'GLuint\ glGetProgramResourceIndex('u
.BI "GLuint glGetProgramResourceIndex(GLuint\ " "program" ", GLenum\ " "programInterface" ", const\ char\ *\ " "name" ");"
.SH "PARAMETERS"
.PP
\fIprogram\fR
.RS 4
The name of a program object whose resources to query\&.
.RE
.PP
\fIprogramInterface\fR
.RS 4
A token identifying the interface within
\fIprogram\fR
containing the resource named
\fIname\fR\&.
.RE
.PP
\fIname\fR
.RS 4
The name of the resource to query the index of\&.
.RE
.SH "DESCRIPTION"
.PP
\fBglGetProgramResourceIndex\fR
returns the unsigned integer index assigned to a resource named
\fIname\fR
in the interface type
\fIprogramInterface\fR
of program object
\fIprogram\fR\&.
.PP
\fIprogram\fR
must be the name of an existing program object\&.
\fIprogramInterface\fR
is the name of the interface within
\fIprogram\fR
which contains the resource named
\fIname\fRand must be one of the following values:
.PP
\fBGL_UNIFORM\fR
.RS 4
The query is targeted at the set of active uniforms within
\fIprogram\fR\&.
.RE
.PP
\fBGL_UNIFORM_BLOCK\fR
.RS 4
The query is targeted at the set of active uniform blocks within
\fIprogram\fR\&.
.RE
.PP
\fBGL_PROGRAM_INPUT\fR
.RS 4
The query is targeted at the set of active input variables used by the first shader stage of
\fIprogram\fR\&. If
\fIprogram\fR
contains multiple shader stages then input variables from any stage other than the first will not be enumerated\&.
.RE
.PP
\fBGL_PROGRAM_OUTPUT\fR
.RS 4
The query is targeted at the set of active output variables produced by the last shader stage of
\fIprogram\fR\&. If
\fIprogram\fR
contains multiple shader stages then output variables from any stage other than the last will not be enumerated\&.
.RE
.PP
\fBGL_VERTEX_SUBROUTINE\fR, \fBGL_TESS_CONTROL_SUBROUTINE\fR, \fBGL_TESS_EVALUATION_SUBROUTINE\fR, \fBGL_GEOMETRY_SUBROUTINE\fR, \fBGL_FRAGMENT_SUBROUTINE\fR, \fBGL_COMPUTE_SUBROUTINE\fR
.RS 4
The query is targeted at the set of active subroutines for the vertex, tessellation control, tessellation evaluation, geometry, fragment and compute shader stages of
\fIprogram\fR, respectively\&.
.RE
.PP
\fBGL_VERTEX_SUBROUTINE_UNIFORM\fR, \fBGL_TESS_CONTROL_SUBROUTINE_UNIFORM\fR, \fBGL_TESS_EVALUATION_SUBROUTINE_UNIFORM\fR, \fBGL_GEOMETRY_SUBROUTINE_UNIFORM\fR, \fBGL_FRAGMENT_SUBROUTINE_UNIFORM\fR, \fBGL_COMPUTE_SUBROUTINE_UNIFORM\fR
.RS 4
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
\fIprogram\fR, respectively\&.
.RE
.PP
\fBGL_TRANSFORM_FEEDBACK_VARYING\fR
.RS 4
The query is targeted at the set of output variables from the last non\-fragment stage of
\fIprogram\fR
that would be captured if transform feedback were active\&.
.RE
.PP
\fBGL_TRANSFORM_FEEDBACK_BUFFER\fR
.RS 4
The query is targeted at the set of active buffer binding points to which output variables in the
\fBGL_TRANSFORM_FEEDBACK_VARYING\fR
interface are written\&.
.RE
.PP
\fBGL_BUFFER_VARIABLE\fR
.RS 4
The query is targeted at the set of active buffer variables used by
\fIprogram\fR\&.
.RE
.PP
\fBGL_SHADER_STORAGE_BLOCK\fR
.RS 4
The query is targeted at the set of active shader storage blocks used by
\fIprogram\fR\&.
.RE
.PP
If
\fIname\fR
exactly matches the name string of one of the active resources for
\fIprogramInterface\fR, the index of the matched resource is returned\&. Additionally, if
\fIname\fR
would exactly match the name string of an active resource if "[0]" were appended to
\fIname\fR, the index of the matched resource is returned\&. Otherwise,
\fIname\fR
is considered not to be the name of an active resource, and
\fBGL_INVALID_INDEX\fR
is returned\&.
.PP
For the interface
\fBGL_TRANSFORM_FEEDBACK_VARYING\fR, the value
\fBGL_INVALID_INDEX\fR
should be returned when querying the index assigned to the special names
gl_NextBuffer,
gl_SkipComponents1,
gl_SkipComponents2,
gl_SkipComponents3, or
gl_SkipComponents4\&.
.SH "ERRORS"
.PP
\fBGL_INVALID_ENUM\fR
is generated if
\fIprogramInterface\fR
is not one of the accepted interface types\&.
.PP
\fBGL_INVALID_ENUM\fR
is generated if
\fIprogramInterface\fR
is
\fBGL_ATOMIC_COUNTER_BUFFER\fR
or
\fBGL_TRANSFORM_FEEDBACK_BUFFER\fR, since active atomic counter and transform feedback buffer resources are not assigned name strings\&.
.PP
Although not an error,
\fBGL_INVALID_INDEX\fR
is returned if
\fIname\fR
is not the name of a resource within the interface identified by
\fIprogramInterface\fR\&.
.SH "VERSION SUPPORT"
.TS
allbox tab(:);
lB cB s s s s s s s s s s s
lB cB cB cB cB cB cB cB cB cB cB cB cB.
T{

T}:T{
\fBOpenGL Version\fR
T}
T{
\fBFunction / Feature Name\fR
T}:T{
\fB2\&.0\fR
T}:T{
\fB2\&.1\fR
T}:T{
\fB3\&.0\fR
T}:T{
\fB3\&.1\fR
T}:T{
\fB3\&.2\fR
T}:T{
\fB3\&.3\fR
T}:T{
\fB4\&.0\fR
T}:T{
\fB4\&.1\fR
T}:T{
\fB4\&.2\fR
T}:T{
\fB4\&.3\fR
T}:T{
\fB4\&.4\fR
T}:T{
\fB4\&.5\fR
T}
.T&
l c c c c c c c c c c c c.
T{
\fBglGetProgramResourceIndex\fR
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
\-
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}
.TE
.sp 1
.SH "SEE ALSO"
.PP
\fBglGetProgramResourceName\fR(),
\fBglGetProgramResource\fR(),
\fBglGetProgramResourceLocation\fR(),
\fBglGetProgramResourceLocationIndex\fR()\&.
.SH "COPYRIGHT"
.PP
Copyright
\(co
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\&.
\m[blue]\fBhttp://opencontent\&.org/openpub/\fR\m[]\&.
.SH "COPYRIGHT"
.br
Copyright \(co 2013-2014 Khronos Group
.br