NAME

       texture - retrieves texels from a texture

DECLARATION

       gvec4 texture(gsampler1D sampler, float P, [float bias]);

       gvec4 texture(gsampler2D sampler, vec2 P, [float bias]);

       gvec4 texture(gsampler3D sampler, vec3 P, [float bias]);

       gvec4 texture(gsamplerCube sampler, vec3 P, [float bias]);

       float texture(sampler1DShadow sampler, vec3 P, [float bias]);

       float texture(sampler2DShadow sampler, vec3 P, [float bias]);

       float texture(samplerCubeShadow sampler, vec3 P, [float bias]);

       gvec4 texture(gsampler1DArray sampler, vec2 P, [float bias]);

       gvec4 texture(gsampler2DArray sampler, vec3 P, [float bias]);

       gvec4 texture(gsamplerCubeArray sampler, vec4 P, [float bias]);

       float texture(sampler1DArrayShadow sampler, vec3 P, [float bias]);

       float texture(gsampler2DArrayShadow sampler, vec4 P, [float bias]);

       gvec4 texture(gsampler2DRect sampler, vec2 P);

       float texture(sampler2DRectShadow sampler, vec3 P);

       float texture(gsamplerCubeArrayShadow sampler, vec4 P, float compare);

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.

       bias
           Specifies an optional bias to be applied during level-of-detail computation.

       compare
           Specifies the value to which the fetched texel will be compared when sampling from
           gsamplerCubeArrayShadow.

DESCRIPTION

       texture samples texels from the texture bound to sampler at texture coordinate P. An
       optional bias, specified in bias is included in the level-of-detail computation that is
       used to choose mipmap(s) from which to sample.

       For shadow forms, when compare is present, it is used as Dsub and the array layer is
       specified in P.w. When compare is not present, the last component of P is used as Dsub and
       the array layer is specified in the second to last component of P. (The second component
       of P is unused for 1D shadow lookups.)

       For non-shadow variants, the array layer comes from the last component of P.

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                        │      │      │      │      │      │      │      │      │      │      │      │      │
       ├────────────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │texture                     │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       ├────────────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │texture                     │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       │(gsampler2DRect{Shadow})    │      │      │      │      │      │      │      │      │      │      │      │      │
       ├────────────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │texture (gsampler2DMS,      │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       │gsampler2DMSArray)          │      │      │      │      │      │      │      │      │      │      │      │      │
       ├────────────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │texture                     │  -   │  -   │  -   │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       │(gsamplerCubeArray{Shadow}) │      │      │      │      │      │      │      │      │      │      │      │      │
       └────────────────────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘

SEE ALSO

       texelFetch(), texelFetchOffset(), 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                                TEXTURE(3G)