textureLod(3) perform a texture lookup with explicit level-of-detail

DECLARATION

gvec4 textureLod(gsampler1D sampler, float P, float lod);
gvec4 textureLod(gsampler2D sampler, vec2 P, float lod);
gvec4 textureLod(gsampler3D sampler, vec3 P, float lod);
gvec4 textureLod(gsamplerCube sampler, vec3 P, float lod);
float textureLod(sampler1DShadow sampler, vec3 P, float lod);
float textureLod(sampler2DShadow sampler, vec4 P, float lod);
gvec4 textureLod(gsampler1DArray sampler, vec2 P, float lod);
gvec4 textureLod(gsampler2DArray sampler, vec3 P, float lod);
float textureLod(sampler1DArrayShadow sampler, vec3 P, float lod);
gvec4 textureLod(gsamplerCubeArray sampler, vec4 P, float lod);

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

Specifies the explicit level-of-detail

DESCRIPTION

textureLod performs a texture lookup at coordinate P from the texture bound to sampler with an explicit level-of-detail as specified in lod. lod specifies λbase and sets the partial derivatives as follows:

δ u δ x = 0 , δ v δ x = 0 , δ w δ x = 0 δ u δ y = 0 , δ v δ y = 0 , δ w δ y = 0

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
textureLod - -
textureLod (gsampler2DRect{Shadow}) - - -
textureLod (gsamplerCubeArray) - - - - - -

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

COPYRIGHT


Copyright © 2011-2014 Khronos Group