Name

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

FunctionVersion 1.10Version 1.20Version 1.30Version 1.40Version 1.50Version 3.30Version 4.00Version 4.10Version 4.20Version 4.30
texelFetch--YYYYYYYY
texelFetch (gsampler2DRect, gsamplerBuffer)---YYYYYYY
texelFetch (gsampler2DMS, gsampler2DMSArray)----YYYYYY

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/.