textureProjGrad - perform a texture lookup with projection and explicit gradients

       Copyright © 2011-2014 Khronos Group

[FIXME: source]                                    11/18/2024                                TEXTUREPROJGRAD(3G)

gvec4textureProjGrad(gsampler1Dsampler,vec2P,floatpDx,floatpDy);gvec4textureProjGrad(gsampler1Dsampler,vec4P,floatpDx,floatpDy);gvec4textureProjGrad(gsampler2Dsampler,vec3P,vec2pDx,vec2pDy);gvec4textureProjGrad(gsampler2Dsampler,vec4P,vec2pDx,vec2pDy);gvec4textureProjGrad(gsampler3Dsampler,vec4P,vec3pDx,vec3pDy);floattextureProjGrad(sampler1DShadowsampler,vec4P,floatpDx,floatpDy);floattextureProjGrad(sampler2DShadowsampler,vec4P,vec2pDx,vec2pDy);gvec4textureProjGrad(gsampler2DRectsampler,vec3P,vec2pDx,vec2pDy);gvec4textureProjGrad(gsampler2DRectsampler,vec4P,vec2pDx,vec2pDy);floattextureProjGrad(gsampler2DRectShadowsampler,vec4P,vec2pDx,vec2pDy);

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.

       textureProjGrad - perform a texture lookup with projection and explicit gradients

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.

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

       ┌──────────────────────────┬───────────────────────────────────────────────────────────────────────────────────┐
       │                          │        OpenGLShadingLanguageVersion                                            │
       ├──────────────────────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┤
       │ 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                     │      │      │      │      │      │      │      │      │      │      │      │      │
       ├──────────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │ textureProjGrad          │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       ├──────────────────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │ textureProjGrad          │  -   │  -   │  -   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       │ (gsampler2DRect{Shadow}) │      │      │      │      │      │      │      │      │      │      │      │      │
       └──────────────────────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘