texelFetchOffset - perform a lookup of a single texel within a texture with an offset

       Copyright © 2011-2014 Khronos Group

[FIXME: source]                                    11/18/2024                               TEXELFETCHOFFSET(3G)

gvec4texelFetchOffset(gsampler1Dsampler,intP,intlod,intoffset);gvec4texelFetchOffset(gsampler2Dsampler,ivec2P,intlod,intoffset);gvec4texelFetchOffset(gsampler3Dsampler,ivec3P,intlod,intoffset);gvec4texelFetchOffset(gsampler2DRectsampler,ivec2P,intoffset);gvec4texelFetchOffset(gsampler1DArraysampler,ivec2P,intlod,intoffset);gvec4texelFetchOffset(gsampler2DArraysampler,ivec3P,intlod,intoffset);

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.

       texelFetchOffset - perform a lookup of a single texel within a texture with an 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.

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

       ┌────────────────────┬───────────────────────────────────────────────────────────────────────────────────┐
       │                    │        OpenGLShadingLanguageVersion                                            │
       ├────────────────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┤
       │ 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               │      │      │      │      │      │      │      │      │      │      │      │      │
       ├────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │ texelFetchOffset   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       ├────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │ texelFetchOffset   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       │ (gsampler2DRect)   │      │      │      │      │      │      │      │      │      │      │      │      │
       ├────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │ texelFetchOffset   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       │ (gsampler2DMS,     │      │      │      │      │      │      │      │      │      │      │      │      │
       │ gsampler2DMSArray) │      │      │      │      │      │      │      │      │      │      │      │      │
       └────────────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘