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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                                            │
       ├───────────────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┤
       │Function1.101.201.301.401.503.304.004.104.204.304.404.50 │
       │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)