texelFetchOffset — perform a lookup of a single texel within a texture with an offset
gvec4 texelFetchOffset( | gsampler1D | sampler, |
int | P, | |
int | lod, | |
int | offset) ; |
gvec4 texelFetchOffset( | gsampler2D | sampler, |
ivec2 | P, | |
int | lod, | |
int | offset) ; |
gvec4 texelFetchOffset( | gsampler3D | sampler, |
ivec3 | P, | |
int | lod, | |
int | offset) ; |
gvec4 texelFetchOffset( | gsampler2DRect | sampler, |
ivec2 | P, | |
int | offset) ; |
gvec4 texelFetchOffset( | gsampler1DArray | sampler, |
ivec2 | P, | |
int | lod, | |
int | offset) ; |
gvec4 texelFetchOffset( | gsampler2DArray | sampler, |
ivec3 | P, | |
int | lod, | |
int | offset) ; |
sampler
Specifies the sampler to which the texture from which texels will be retrieved is bound.
P
Specifies the texture coordinates at which texture will be sampled.
lod
If present, specifies the level-of-detail within the texture from which the texel will be fetched.
offset
Specifies offset, in texels that will be applied to P
before looking up the texel.
texelFetchOffset
performs a lookup of a single texel from texture coordinate P
in the texture bound to sampler
. Before fetching the texel, the offset specified in offset
is added to P
. offset
must be a constant expression. The array layer is specified in the last component of
P
for array forms. The lod
parameter (if present) specifies the level-of-detail
from which the texel will be fetched. The sample
parameter specifies which sample within the texel will be
returned when reading from a multi-sample texure.
Function | Version 1.10 | Version 1.20 | Version 1.30 | Version 1.40 | Version 1.50 | Version 3.30 | Version 4.00 | Version 4.10 | Version 4.20 | Version 4.30 |
---|---|---|---|---|---|---|---|---|---|---|
texelFetchOffset | - | - | Y | Y | Y | Y | Y | Y | Y | Y |
texelFetchOffset (gsampler2DRect) | - | - | - | Y | Y | Y | Y | Y | Y | Y |
texelFetchOffset (gsampler2DMS, gsampler2DMSArray) | - | - | - | - | Y | Y | Y | Y | Y | Y |
texelFetch, texture, textureGather, textureGatherOffset, textureGatherOffsets, textureGrad, textureGradOffset, textureLod, textureLodOffset, textureOffset, textureProj, textureProjGrad, textureProjGradOffset, textureProjLod, textureProjLodOffset, textureProjOffset, textureQueryLod, textureSize
Copyright © 2011 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. http://opencontent.org/openpub/.