Name
texelFetch — perform a lookup of a single texel within a texture
Declaration
gvec4 texelFetch(
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gsampler1D sampler, |
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int P, |
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int lod); |
gvec4 texelFetch(
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gsampler2D sampler, |
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ivec2 P, |
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int lod); |
gvec4 texelFetch(
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gsampler3D sampler, |
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ivec3 P, |
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int lod); |
gvec4 texelFetch(
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gsampler2DRect sampler, |
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ivec2 P); |
gvec4 texelFetch(
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gsampler1DArray sampler, |
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ivec2 P, |
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int lod); |
gvec4 texelFetch(
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gsampler2DArray sampler, |
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ivec3 P, |
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int lod); |
gvec4 texelFetch(
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gsamplerBuffer sampler, |
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int P); |
gvec4 texelFetch(
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gsampler2DMS sampler, |
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ivec2 P, |
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int sample); |
gvec4 texelFetch(
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gsampler2DMSArray sampler, |
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ivec3 P, |
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int sample); |
Parameters
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sampler
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Specifies the sampler to which the texture from which texels will be retrieved is bound.
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P
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Specifies the texture coordinates at which texture will be sampled.
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lod
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If present, specifies the level-of-detail within the texture from which the texel will be fetched.
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sample
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For multisampled fetches, specifies which sample within the texel from 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 © 2011-2014 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/.