'\" t
.\"     Title: textureGradOffset
.\"    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 "TEXTUREGRADOFFSET" "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"
textureGradOffset \- perform a texture lookup with explicit gradients and offset
.SH "DECLARATION"
.HP \w'gvec4\ textureGradOffset('u
.BI "gvec4 textureGradOffset(gsampler1D\ " "sampler" ", float\ " "P" ", float\ " "dPdx" ", float\ " "dPdy" ", int\ " "offset" ");"
.HP \w'gvec4\ textureGradOffset('u
.BI "gvec4 textureGradOffset(gsampler2D\ " "sampler" ", vec2\ " "P" ", vec2\ " "dPdx" ", vec2\ " "dPdy" ", ivec2\ " "offset" ");"
.HP \w'gvec4\ textureGradOffset('u
.BI "gvec4 textureGradOffset(gsampler3D\ " "sampler" ", vec3\ " "P" ", vec3\ " "dPdx" ", vec3\ " "dPdy" ", ivec3\ " "offset" ");"
.HP \w'gvec4\ textureGradOffset('u
.BI "gvec4 textureGradOffset(gsampler2DRect\ " "sampler" ", vec2\ " "P" ", vec2\ " "dPdx" ", vec2\ " "dPdy" ", ivec2\ " "offset" ");"
.HP \w'float\ textureGradOffset('u
.BI "float textureGradOffset(gsampler2DRectShadow\ " "sampler" ", vec3\ " "P" ", vec2\ " "dPdx" ", vec2\ " "dPdy" ", ivec2\ " "offset" ");"
.HP \w'float\ textureGradOffset('u
.BI "float textureGradOffset(sampler1DShadow\ " "sampler" ", vec3\ " "P" ", float\ " "dPdx" ", float\ " "dPdy" ", int\ " "offset" ");"
.HP \w'float\ textureGradOffset('u
.BI "float textureGradOffset(sampler2DShadow\ " "sampler" ", vec3\ " "P" ", vec2\ " "dPdx" ", vec2\ " "dPdy" ", ivec2\ " "offset" ");"
.HP \w'gvec4\ textureGradOffset('u
.BI "gvec4 textureGradOffset(gsampler1DArray\ " "sampler" ", vec2\ " "P" ", float\ " "dPdx" ", float\ " "dPdy" ", int\ " "offset" ");"
.HP \w'gvec4\ textureGradOffset('u
.BI "gvec4 textureGradOffset(gsampler2DArray\ " "sampler" ", vec3\ " "P" ", vec2\ " "dPdx" ", vec2\ " "dPdy" ", ivec2\ " "offset" ");"
.HP \w'float\ textureGradOffset('u
.BI "float textureGradOffset(sampler1DArrayShadow\ " "sampler" ", vec3\ " "P" ", float\ " "dPdx" ", float\ " "dPdy" ", int\ " "offset" ");"
.HP \w'float\ textureGradOffset('u
.BI "float textureGradOffset(sampler2DArrayShadow\ " "sampler" ", vec3\ " "P" ", vec2\ " "dPdx" ", vec2\ " "dPdy" ", ivec2\ " "offset" ");"
.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
\fIdPdx\fR
.RS 4
Specifies the partial derivative of
\fIP\fR
with respect to window x\&.
.RE
.PP
\fIdPdy\fR
.RS 4
Specifies the partial derivative of
\fIP\fR
with respect to window y\&.
.RE
.PP
\fIoffset\fR
.RS 4
Specifies the offset to be applied to the texture coordinates before sampling\&.
.RE
.SH "DESCRIPTION"
.PP
\fBtextureGradOffset\fR
performs a texture lookup at coordinate
\fIP\fR
from the texture bound to
\fIsampler\fR
with explicit texture coordinate gradiends as specified in
\fIdPdx\fR
and
\fIdPdy\fR\&. An explicit offset is also supplied in
\fIoffset\fR\&.
\fBtextureGradOffset\fR
consumes
\fIdPdx\fR
and
\fIdPdy\fR
as
\fBtextureGrad\fR()
and
\fIoffset\fR
as
\fBtextureOffset\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 Shading Language Version\fR
T}
T{
\fBFunction Name\fR
T}:T{
\fB1\&.10\fR
T}:T{
\fB1\&.20\fR
T}:T{
\fB1\&.30\fR
T}:T{
\fB1\&.40\fR
T}:T{
\fB1\&.50\fR
T}:T{
\fB3\&.30\fR
T}:T{
\fB4\&.00\fR
T}:T{
\fB4\&.10\fR
T}:T{
\fB4\&.20\fR
T}:T{
\fB4\&.30\fR
T}:T{
\fB4\&.40\fR
T}:T{
\fB4\&.50\fR
T}
.T&
l c c c c c c c c c c c c
l c c c c c c c c c c c c.
T{
textureGradOffset
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}
T{
textureGradOffset (gsampler2DRect{Shadow})
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(),
\fBtextureGatherOffsets\fR(),
\fBtextureGrad\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