TEXTUREPROJGRAD(3G)             [FIXME: manual]            TEXTUREPROJGRAD(3G)

NAME
       textureProjGrad - perform a texture lookup with projection and explicit
       gradients

DECLARATION
       gvec4 textureProjGrad(gsampler1D sampler, vec2 P, float pDx,
                             float pDy);

       gvec4 textureProjGrad(gsampler1D sampler, vec4 P, float pDx,
                             float pDy);

       gvec4 textureProjGrad(gsampler2D sampler, vec3 P, vec2 pDx, vec2 pDy);

       gvec4 textureProjGrad(gsampler2D sampler, vec4 P, vec2 pDx, vec2 pDy);

       gvec4 textureProjGrad(gsampler3D sampler, vec4 P, vec3 pDx, vec3 pDy);

       float textureProjGrad(sampler1DShadow sampler, vec4 P, float pDx,
                             float pDy);

       float textureProjGrad(sampler2DShadow sampler, vec4 P, vec2 pDx,
                             vec2 pDy);

       gvec4 textureProjGrad(gsampler2DRect sampler, vec3 P, vec2 pDx,
                             vec2 pDy);

       gvec4 textureProjGrad(gsampler2DRect sampler, vec4 P, vec2 pDx,
                             vec2 pDy);

       float textureProjGrad(sampler2DRectShadow sampler, vec4 P, vec2 pDx,
                             vec2 pDy);

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.

DESCRIPTION
       textureProjGrad performs a texture lookup with projection and explicit
       gradients. The texture coordinates consumed from P, not including the
       last component of P, are divided by the last component of P. The
       resulting 3rd component of P in the shadow forms is used as Dref. After
       these values are computed, the texture lookup proceeds as in
       textureGrad(), passing dPdx and dPdy as gradients.

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 |
       +-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+
       |textureProjGrad          |  -   |  -   | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  |
       +-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+
       |textureProjGrad          |  -   |  -   |  -   | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  |
       |(gsampler2DRect{Shadow}) |      |      |      |      |      |      |      |      |      |      |      |      |
       +-------------------------+------+------+------+------+------+------+------+------+------+------+------+------+

SEE ALSO
       texelFetch(), texelFetchOffset(), texture(), textureGather(),
       textureGatherOffset(), textureGatherOffsets(), textureGrad(),
       textureGradOffset(), textureLod(), textureLodOffset(), textureOffset(),
       textureProj(), textureProjGradOffset(), textureProjLod(),
       textureProjLodOffset(), textureProjOffset(), textureQueryLod(),
       textureSize()

COPYRIGHT
       Copyright (C) 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.  https://opencontent.org/openpub/.

COPYRIGHT
       Copyright (C) 2011-2014 Khronos Group

[FIXME: source]                   06/13/2025               TEXTUREPROJGRAD(3G)