Provided by: opengl-4-man-doc_1.0~svn33624-1_all 
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
┌────────────────────┬───────────────────────────────────────────────────────────────────────────────────┐
│ │ OpenGL Shading Language Version │
├────────────────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┤
│ Function │ 1.10 │ 1.20 │ 1.30 │ 1.40 │ 1.50 │ 3.30 │ 4.00 │ 4.10 │ 4.20 │ 4.30 │ 4.40 │ 4.50 │
│ Name │ │ │ │ │ │ │ │ │ │ │ │ │
├────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
│ texelFetch │ - │ - │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
├────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
│ texelFetch │ - │ - │ - │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
│ (gsampler2DRect, │ │ │ │ │ │ │ │ │ │ │ │ │
│ gsamplerBuffer) │ │ │ │ │ │ │ │ │ │ │ │ │
├────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
│ texelFetch │ - │ - │ - │ - │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
│ (gsampler2DMS, │ │ │ │ │ │ │ │ │ │ │ │ │
│ gsampler2DMSArray) │ │ │ │ │ │ │ │ │ │ │ │ │
└────────────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘
SEE ALSO
texelFetch(), texture(), textureGather(), textureGatherOffset(), textureGatherOffsets(), textureGrad(),
textureGradOffset(), textureLod(), textureLodOffset(), textureOffset(), textureProj(), textureProjGrad(),
textureProjGradOffset(), textureProjLod(), textureProjLodOffset(), textureProjOffset(),
textureQueryLod(), textureSize()
COPYRIGHT
Copyright © 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. http://opencontent.org/openpub/.
COPYRIGHT
Copyright © 2011-2014 Khronos Group
[FIXME: source] 01/03/2018 TEXELFETCH(3G)