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.\"     Title: textureGatherOffsets
.\"    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 "TEXTUREGATHEROFFSETS" "3G" "05/21/2015" "[FIXME: source]" "[FIXME: manual]"
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.SH "NAME"
textureGatherOffsets \- gathers four texels from a texture with an array of offsets
.SH "DECLARATION"
.HP \w'gvec4\ textureGatherOffsets('u
.BI "gvec4 textureGatherOffsets(gsampler2D\ " "sampler" ", vec2\ " "P" ", ivec2\ " "offsets[4]" ", [int\ " "comp]" ");"
.HP \w'gvec4\ textureGatherOffsets('u
.BI "gvec4 textureGatherOffsets(gsampler2DArray\ " "sampler" ", vec3\ " "P" ", ivec2\ " "offsets[4]" ", [int\ " "comp]" ");"
.HP \w'gvec4\ textureGatherOffsets('u
.BI "gvec4 textureGatherOffsets(gsampler2DRect\ " "sampler" ", vec3\ " "P" ", ivec2\ " "offsets[4]" ", [int\ " "comp]" ");"
.HP \w'vec4\ textureGatherOffsets('u
.BI "vec4 textureGatherOffsets(gsampler2DShadow\ " "sampler" ", vec2\ " "P" ", float\ " "refZ" ", ivec2\ " "offsets[4]" ");"
.HP \w'vec4\ textureGatherOffsets('u
.BI "vec4 textureGatherOffsets(gsampler2DArrayShadow\ " "sampler" ", vec3\ " "P" ", float\ " "refZ" ", ivec2\ " "offsets[4]" ");"
.HP \w'vec4\ textureGatherOffsets('u
.BI "vec4 textureGatherOffsets(gsampler2DRectShadow\ " "sampler" ", vec3\ " "P" ", float\ " "refZ" ", ivec2\ " "offsets[4]" ");"
.SH "PARAMETERS"
.PP
\fIsampler\fR
.RS 4
Specifies the sampler to which the texture from which texels will be retrieved is bound\&.
.RE
.PP
\fIP\fR
.RS 4
Specifies the texture coordinates at which texture will be sampled\&.
.RE
.PP
\fIcomp\fR
.RS 4
Specifies the component of the source texture that will be used to generate the resulting vector\&.
.RE
.PP
\fIrefZ\fR
.RS 4
Specifies the reference Z value used in the comparison for shadow forms\&.
.RE
.PP
\fIoffsets\fR
.RS 4
Specifies an array of offsets from the specified texture coordinate
\fIP\fR
from which the texels will be gathered\&.
.RE
.SH "DESCRIPTION"
.PP
\fBtextureGatherOffsets\fR
operates identically to
\fBtextureGatherOffset\fR(), except that
\fIoffsets\fR
is used to determine the location of the four texels to sample\&. Each of the four texels is obtained by applying the offset in
\fIoffsets\fR
as a (u, v) coordinate offset to
\fIP\fR, identifying the four\-texel
\fBGL_LINEAR\fR
footprint, and then selecting the texel
i0i0
of that footprint\&. The specified values in
\fIoffsets\fR
must be set with constant integral expressions\&.
.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 Shading Language Version\fR
T}
T{
\fBFunction Name\fR
T}:T{
\fB1\&.10\fR
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\fB1\&.20\fR
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\fB1\&.30\fR
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\fB1\&.40\fR
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\fB4\&.00\fR
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\fB4\&.10\fR
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\fB4\&.20\fR
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\fB4\&.30\fR
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\fB4\&.40\fR
T}:T{
\fB4\&.50\fR
T}
.T&
l c c c c c c c c c c c c.
T{
textureGatherOffsets
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"
.PP
\fBtexelFetch\fR(),
\fBtexelFetchOffset\fR(),
\fBtexture\fR(),
\fBtextureGather\fR(),
\fBtextureGatherOffset\fR(),
\fBtextureGrad\fR(),
\fBtextureGradOffset\fR(),
\fBtextureLod\fR(),
\fBtextureLodOffset\fR(),
\fBtextureOffset\fR(),
\fBtextureProj\fR(),
\fBtextureProjGrad\fR(),
\fBtextureProjGradOffset\fR(),
\fBtextureProjLod\fR(),
\fBtextureProjLodOffset\fR(),
\fBtextureProjOffset\fR(),
\fBtextureQueryLod\fR(),
\fBtextureSize\fR()
.SH "COPYRIGHT"
.PP
Copyright
\(co
2011\-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 2011-2014 Khronos Group
.br