texelFetch — perform a lookup of a single texel within a texture
gvec4 texelFetch(
|
gsampler2D sampler, |
| ivec2 P, | |
int lod); |
gvec4 texelFetch(
|
gsampler3D sampler, |
| ivec3 P, | |
int lod); |
gvec4 texelFetch(
|
gsampler2DArray sampler, |
| ivec3 P, | |
int lod); |
gvec4 texelFetch(
|
gsampler2DMS sampler, |
| ivec2 P, | |
int sample); |
gvec4 texelFetch(
|
gsampler2DMSArray sampler, |
| ivec3 P, | |
int sample); |
gvec4 texelFetch(
|
gsamplerBuffer sampler, |
int P); |
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 the data will be returned.
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.
| OpenGL ES Shading Language Version | ||||
|---|---|---|---|---|
| Function Name | 1.00 | 3.00 | 3.10 | 3.20 |
| texelFetch | - | ✔ | ✔ | ✔ |
| texelFetch (gsampler2DMS) | - | - | ✔ | ✔ |
| texelFetch (gsampler2DMSArray, gsamplerBuffer) | - | - | - | ✔ |
texelFetchOffset, texture, textureGrad, textureGradOffset, textureLod, textureLodOffset, textureOffset, textureProj, textureProjGrad, textureProjGradOffset, textureProjLod, textureProjLodOffset, textureProjOffset, textureSize
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