'\" t
.\"     Title: glFlush
.\"    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 "GLFLUSH" "3G" "01/03/2018" "[FIXME: source]" "[FIXME: manual]"
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.SH "NAME"
glFlush \- force execution of GL commands in finite time
.SH "C SPECIFICATION"
.HP \w'void\ glFlush('u
.BI "void glFlush(" "void" ");"
.SH "DESCRIPTION"
.PP
Different GL implementations buffer commands in several different locations, including network buffers and the graphics accelerator itself\&.
\fBglFlush\fR
empties all of these buffers, causing all issued commands to be executed as quickly as they are accepted by the actual rendering engine\&. Though this execution may not be completed in any particular time period, it does complete in finite time\&.
.PP
Because any GL program might be executed over a network, or on an accelerator that buffers commands, all programs should call
\fBglFlush\fR
whenever they count on having all of their previously issued commands completed\&. For example, call
\fBglFlush\fR
before waiting for user input that depends on the generated image\&.
.SH "NOTES"
.PP
\fBglFlush\fR
can return at any time\&. It does not wait until the execution of all previously issued GL commands is complete\&.
.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{
\fBglFlush\fR
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
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✔
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✔
T}:T{
✔
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T}:T{
✔
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✔
T}
.TE
.sp 1
.SH "SEE ALSO"
.PP
\fBglFinish\fR()
.SH "COPYRIGHT"
.PP
Copyright
\(co
1991\-2006 Silicon Graphics, Inc\&. Copyright
\(co
2010\-2014 Khronos Group\&. This document is licensed under the SGI Free Software B License\&. For details, see
\m[blue]\fBhttp://oss\&.sgi\&.com/projects/FreeB/\fR\m[]\&.
.SH "COPYRIGHT"
.br
Copyright \(co 1991-2006 Silicon Graphics, Inc.
.br
Copyright \(co 2010-2014 Khronos Group
.br