'\" t
.\"     Title: glGetUniformIndices
.\"    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 "GLGETUNIFORMINDICES" "3G" "01/03/2018" "[FIXME: source]" "[FIXME: manual]"
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.SH "NAME"
glGetUniformIndices \- retrieve the index of a named uniform block
.SH "C SPECIFICATION"
.HP \w'void\ glGetUniformIndices('u
.BI "void glGetUniformIndices(GLuint\ " "program" ", GLsizei\ " "uniformCount" ", const\ GLchar\ **" "uniformNames" ", GLuint\ *" "uniformIndices" ");"
.SH "PARAMETERS"
.PP
\fIprogram\fR
.RS 4
Specifies the name of a program containing uniforms whose indices to query\&.
.RE
.PP
\fIuniformCount\fR
.RS 4
Specifies the number of uniforms whose indices to query\&.
.RE
.PP
\fIuniformNames\fR
.RS 4
Specifies the address of an array of pointers to buffers containing the names of the queried uniforms\&.
.RE
.PP
\fIuniformIndices\fR
.RS 4
Specifies the address of an array that will receive the indices of the uniforms\&.
.RE
.SH "DESCRIPTION"
.PP
\fBglGetUniformIndices\fR
retrieves the indices of a number of uniforms within
\fIprogram\fR\&.
.PP
\fIprogram\fR
must be the name of a program object for which the command
\fBglLinkProgram\fR()
must have been called in the past, although it is not required that
\fBglLinkProgram\fR()
must have succeeded\&. The link could have failed because the number of active uniforms exceeded the limit\&.
.PP
\fIuniformCount\fR
indicates both the number of elements in the array of names
\fIuniformNames\fR
and the number of indices that may be written to
\fIuniformIndices\fR\&.
.PP
\fIuniformNames\fR
contains a list of
\fIuniformCount\fR
name strings identifying the uniform names to be queried for indices\&. For each name string in
\fIuniformNames\fR, the index assigned to the active uniform of that name will be written to the corresponding element of
\fIuniformIndices\fR\&. If a string in
\fIuniformNames\fR
is not the name of an active uniform, the special value
\fBGL_INVALID_INDEX\fR
will be written to the corresponding element of
\fIuniformIndices\fR\&.
.PP
If an error occurs, nothing is written to
\fIuniformIndices\fR\&.
.SH "ERRORS"
.PP
\fBGL_INVALID_OPERATION\fR
is generated if
\fIprogram\fR
is not the name of a program object for which
\fBglLinkProgram\fR()
has been called in the past\&.
.SH "NOTES"
.PP
\fBglGetUniformIndices\fR
is available only if the GL version is 3\&.1 or greater\&.
.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{
\fBglGetUniformIndices\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
\fBglGetActiveUniform\fR(),
\fBglGetActiveUniformName\fR(),
\fBglLinkProgram\fR()
.SH "COPYRIGHT"
.PP
Copyright
\(co
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\&.
\m[blue]\fBhttp://opencontent\&.org/openpub/\fR\m[]\&.
.SH "COPYRIGHT"
.br
Copyright \(co 2010-2014 Khronos Group
.br