texelFetch(3) perform a lookup of a single texel within a texture


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);



Specifies the sampler to which the texture from which texels will be retrieved is bound.


Specifies the texture coordinates at which texture will be sampled.


If present, specifies the level-of-detail within the texture from which the texel will be fetched.


For multisampled fetches, specifies which sample within the texel from which which 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 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) - - - -


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. m[blue]http://opencontent.org/openpub/m[].


Copyright © 2011-2014 Khronos Group