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TEXELFETCHOFFSET(3G) [FIXME: manual] TEXELFETCHOFFSET(3G)

NAME

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

DECLARATION

gvec4 texelFetchOffset(gsampler1D sampler, int P, int lod, int offset);

gvec4 texelFetchOffset(gsampler2D sampler, ivec2 P, int lod, int offset);

gvec4 texelFetchOffset(gsampler3D sampler, ivec3 P, int lod, int offset);

gvec4 texelFetchOffset(gsampler2DRect sampler, ivec2 P, int offset);

gvec4 texelFetchOffset(gsampler1DArray sampler, ivec2 P, int lod, int offset);

gvec4 texelFetchOffset(gsampler2DArray sampler, ivec3 P, int lod, int offset);

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.

offset

Specifies offset, in texels that will be applied to P before looking up the texel.

DESCRIPTION

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.

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
texelFetchOffset - - ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔
texelFetchOffset (gsampler2DRect) - - - ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔
texelFetchOffset (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
05/21/2015 [FIXME: source]