NAME

       textureGatherOffsets - gathers four texels from a texture with an array of offsets

DECLARATION

       gvec4 textureGatherOffsets(gsampler2D sampler, vec2 P, ivec2 offsets[4], [int comp]);

       gvec4 textureGatherOffsets(gsampler2DArray sampler, vec3 P, ivec2 offsets[4], [int comp]);

       gvec4 textureGatherOffsets(gsampler2DRect sampler, vec3 P, ivec2 offsets[4], [int comp]);

       vec4 textureGatherOffsets(gsampler2DShadow sampler, vec2 P, float refZ, ivec2 offsets[4]);

       vec4 textureGatherOffsets(gsampler2DArrayShadow sampler, vec3 P, float refZ,
                                 ivec2 offsets[4]);

       vec4 textureGatherOffsets(gsampler2DRectShadow sampler, vec3 P, float refZ,
                                 ivec2 offsets[4]);

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.

       comp
           Specifies the component of the source texture that will be used to generate the
           resulting vector.

       refZ
           Specifies the reference Z value used in the comparison for shadow forms.

       offsets
           Specifies an array of offsets from the specified texture coordinate P from which the
           texels will be gathered.

DESCRIPTION

       textureGatherOffsets operates identically to textureGatherOffset(), except that offsets is
       used to determine the location of the four texels to sample. Each of the four texels is
       obtained by applying the offset in offsets as a (u, v) coordinate offset to P, identifying
       the four-texel GL_LINEAR footprint, and then selecting the texel i0i0 of that footprint.
       The specified values in offsets must be set with constant integral expressions.

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                 │      │      │      │      │      │      │      │      │      │      │      │      │
       ├─────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │textureGatherOffsets │  -   │  -   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       └─────────────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘

SEE ALSO

       texelFetch(), texelFetchOffset(), texture(), textureGather(), textureGatherOffset(),
       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]                             07/22/2015                   TEXTUREGATHEROFFSETS(3G)