TEXELFETCH(3G)

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 Name | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50
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