NAME

       textureGradOffset - perform a texture lookup with explicit gradients and offset

DECLARATION

       gvec4 textureGradOffset(gsampler1D sampler, float P, float dPdx, float dPdy, int offset);

       gvec4 textureGradOffset(gsampler2D sampler, vec2 P, vec2 dPdx, vec2 dPdy, ivec2 offset);

       gvec4 textureGradOffset(gsampler3D sampler, vec3 P, vec3 dPdx, vec3 dPdy, ivec3 offset);

       gvec4 textureGradOffset(gsampler2DRect sampler, vec2 P, vec2 dPdx, vec2 dPdy,
                               ivec2 offset);

       float textureGradOffset(gsampler2DRectShadow sampler, vec3 P, vec2 dPdx, vec2 dPdy,
                               ivec2 offset);

       float textureGradOffset(sampler1DShadow sampler, vec3 P, float dPdx, float dPdy,
                               int offset);

       float textureGradOffset(sampler2DShadow sampler, vec3 P, vec2 dPdx, vec2 dPdy,
                               ivec2 offset);

       gvec4 textureGradOffset(gsampler1DArray sampler, vec2 P, float dPdx, float dPdy,
                               int offset);

       gvec4 textureGradOffset(gsampler2DArray sampler, vec3 P, vec2 dPdx, vec2 dPdy,
                               ivec2 offset);

       float textureGradOffset(sampler1DArrayShadow sampler, vec3 P, float dPdx, float dPdy,
                               int offset);

       float textureGradOffset(sampler2DArrayShadow sampler, vec3 P, vec2 dPdx, vec2 dPdy,
                               ivec2 offset);

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.

       dPdx
           Specifies the partial derivative of P with respect to window x.

       dPdy
           Specifies the partial derivative of P with respect to window y.

       offset
           Specifies the offset to be applied to the texture coordinates before sampling.

DESCRIPTION

       textureGradOffset performs a texture lookup at coordinate P from the texture bound to
       sampler with explicit texture coordinate gradiends as specified in dPdx and dPdy. An
       explicit offset is also supplied in offset.  textureGradOffset consumes dPdx and dPdy as
       textureGrad() and offset as textureOffset().

VERSION SUPPORT

       ┌─────────────────────────┬───────────────────────────────────────────────────────────────────────────────────┐
       │                         │        OpenGL Shading Language Version                                            │
       ├─────────────────────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┤
       │Function                 │ 1.10 │ 1.20 │ 1.30 │ 1.40 │ 1.50 │ 3.30 │ 4.00 │ 4.10 │ 4.20 │ 4.30 │ 4.40 │ 4.50 │
       │Name                     │      │      │      │      │      │      │      │      │      │      │      │      │
       ├─────────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │textureGradOffset        │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       ├─────────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │textureGradOffset        │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       │(gsampler2DRect{Shadow}) │      │      │      │      │      │      │      │      │      │      │      │      │
       └─────────────────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘

SEE ALSO

       texelFetch(), texelFetchOffset(), texture(), textureGather(), textureGatherOffset(),
       textureGatherOffsets(), textureGrad(), 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/.

COPYRIGHT

       Copyright © 2011-2014 Khronos Group

[FIXME: source]                             07/22/2015                      TEXTUREGRADOFFSET(3G)