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.
See Also
texelFetch,
texture,
textureGather,
textureGatherOffset,
textureGatherOffsets,
textureGrad,
textureGradOffset,
textureLod,
textureLodOffset,
textureOffset,
textureProj,
textureProjGrad,
textureProjGradOffset,
textureProjLod,
textureProjLodOffset,
textureProjOffset,
textureQueryLod,
textureSize
Copyright
Copyright © 2011 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/.