2011 Khronos Group
texelFetch 3G
texelFetch perform a lookup of a single texel within a texture

## Declaration

gvec4 `texelFetch` gsampler1D sampler int P int lod gvec4 `texelFetch` gsampler2D sampler ivec2 P int lod gvec4 `texelFetch` gsampler3D sampler ivec3 P int lod gvec4 `texelFetch` gsampler2DRect sampler ivec2 P gvec4 `texelFetch` gsampler1DArray sampler ivec2 P int lod gvec4 `texelFetch` gsampler2DArray sampler ivec3 P int lod gvec4 `texelFetch` gsamplerBuffer sampler int P gvec4 `texelFetch` gsampler2DMS sampler ivec2 P sample sample gvec4 `texelFetch` gsampler2DMSArray sampler ivec3 P sample sample

## Parameters

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.

sample

  For multisampled fetches, specifies which sample within the texel from which which will be returned.

## Description

`texelFetch` performs a lookup of a single texel from texture coordinate P in the texture bound to sampler. 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 specifies which sample within the texel will be returned when reading from a multi-sample texure.

## Version Support

#VARTABLECOLS#
#FUNCTABLEHEADER#
texelFetch#newin13#
texelFetch (gsampler2DRect, gsamplerBuffer)#newin14#
texelFetch (gsampler2DMS, gsampler2DMSArray)#newin15#

## See Also

texelFetch, texture, textureGather, textureGatherOffset, textureGatherOffsets, textureGrad, textureGradOffset, textureLod, textureLodOffset, textureOffset, textureProj, textureProjGrad, textureProjGradOffset, textureProjLod, textureProjLodOffset, textureProjOffset, textureQueryLod, textureSize

## Copyright

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/.