'\" t
.\"     Title: glGetShaderPrecisionFormat
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: 05/21/2015
.\"    Manual: [FIXME: manual]
.\"    Source: [FIXME: source]
.\"  Language: English
.\"
.TH "GLGETSHADERPRECISION" "3G" "05/21/2015" "[FIXME: source]" "[FIXME: manual]"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
glGetShaderPrecisionFormat \- retrieve the range and precision for numeric formats supported by the shader compiler
.SH "C SPECIFICATION"
.HP \w'void\ glGetShaderPrecisionFormat('u
.BI "void glGetShaderPrecisionFormat(GLenum\ " "shaderType" ", GLenum\ " "precisionType" ", GLint\ *" "range" ", GLint\ *" "precision" ");"
.SH "PARAMETERS"
.PP
\fIshaderType\fR
.RS 4
Specifies the type of shader whose precision to query\&.
\fIshaderType\fR
must be
\fBGL_VERTEX_SHADER\fR
or
\fBGL_FRAGMENT_SHADER\fR\&.
.RE
.PP
\fIprecisionType\fR
.RS 4
Specifies the numeric format whose precision and range to query\&.
.RE
.PP
\fIrange\fR
.RS 4
Specifies the address of array of two integers into which encodings of the implementation\*(Aqs numeric range are returned\&.
.RE
.PP
\fIprecision\fR
.RS 4
Specifies the address of an integer into which the numeric precision of the implementation is written\&.
.RE
.SH "DESCRIPTION"
.PP
\fBglGetShaderPrecisionFormat\fR
retrieves the numeric range and precision for the implementation\*(Aqs representation of quantities in different numeric formats in specified shader type\&.
\fIshaderType\fR
specifies the type of shader for which the numeric precision and range is to be retrieved and must be one of
\fBGL_VERTEX_SHADER\fR
or
\fBGL_FRAGMENT_SHADER\fR\&.
\fIprecisionType\fR
specifies the numeric format to query and must be one of
\fBGL_LOW_FLOAT\fR,
\fBGL_MEDIUM_FLOAT\fR\fBGL_HIGH_FLOAT\fR,
\fBGL_LOW_INT\fR,
\fBGL_MEDIUM_INT\fR, or
\fBGL_HIGH_INT\fR\&.
.PP
\fIrange\fR
points to an array of two integers into which the format\*(Aqs numeric range will be returned\&. If min and max are the smallest values representable in the format, then the values returned are defined to be:
\fIrange\fR[0] = floor(log2(|min|)) and
\fIrange\fR[1] = floor(log2(|max|))\&.
.PP
\fIprecision\fR
specifies the address of an integer into which will be written the log2 value of the number of bits of precision of the format\&. If the smallest representable value greater than 1 is 1 +
\fIeps\fR, then the integer addressed by
\fIprecision\fR
will contain floor(\-log2(eps))\&.
.SH "ERRORS"
.PP
\fBGL_INVALID_ENUM\fR
is generated if
\fIshaderType\fR
or
\fIprecisionType\fR
is not an accepted value\&.
.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{
\fBglGetShaderPrecisionFormat\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
.SH "SEE ALSO"
.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