textureGrad — perform a texture lookup with explicit gradients
gvec4 textureGrad( | gsampler1D | sampler, |
float | P, | |
float | dPdx, | |
float | dPdy) ; |
gvec4 textureGrad( | gsampler2D | sampler, |
vec2 | P, | |
vec2 | dPdx, | |
vec2 | dPdy) ; |
gvec4 textureGrad( | gsampler3D | sampler, |
vec3 | P, | |
vec3 | dPdx, | |
vec3 | dPdy) ; |
gvec4 textureGrad( | gsamplerCube | sampler, |
vec3 | P, | |
vec3 | dPdx, | |
vec3 | dPdy) ; |
gvec4 textureGrad( | gsampler2DRect | sampler, |
vec2 | P, | |
vec2 | dPdx, | |
vec2 | dPdy) ; |
float textureGrad( | gsampler2DRectShadow | sampler, |
vec2 | P, | |
vec2 | dPdx, | |
vec2 | dPdy) ; |
float textureGrad( | sampler1DShadow | sampler, |
vec3 | P, | |
float | dPdx, | |
float | dPdy) ; |
float textureGrad( | sampler2DShadow | sampler, |
vec3 | P, | |
vec2 | dPdx, | |
vec2 | dPdy) ; |
gvec4 textureGrad( | gsampler1DArray | sampler, |
vec2 | P, | |
float | dPdx, | |
float | dPdy) ; |
gvec4 textureGrad( | gsampler2DArray | sampler, |
vec3 | P, | |
vec2 | dPdx, | |
vec2 | dPdy) ; |
float textureGrad( | sampler1DArrayShadow | sampler, |
vec3 | P, | |
float | dPdx, | |
float | dPdy) ; |
gvec4 textureGrad( | gsamplerCubeArray | sampler, |
vec4 | P, | |
vec3 | dPdx, | |
vec3 | dPdy) ; |
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.
textureGrad
performs a texture lookup at coordinate P
from the
texture bound to sampler
with explicit texture coordinate gradiends as specified in
dPdx
and dPdy
. Set:
For the cube version, the partial derivatives of P
are assumed to be
in the coordinate system used before texture coordinates are projected onto the appropriate
cube face.
Function | Version 1.10 | Version 1.20 | Version 1.30 | Version 1.40 | Version 1.50 | Version 3.30 | Version 4.00 | Version 4.10 | Version 4.20 | Version 4.30 |
---|---|---|---|---|---|---|---|---|---|---|
textureGrad | - | - | Y | Y | Y | Y | Y | Y | Y | Y |
textureGrad (gsampler2DRect{Shadow}) | - | - | - | Y | Y | Y | Y | Y | Y | Y |
textureGrad (gsamplerCubeArray) | - | - | - | - | - | - | Y | Y | Y | Y |
texelFetch, texelFetchOffset, texture, textureGather, textureGatherOffset, textureGatherOffsets, textureGradOffset, textureLod, textureLodOffset, textureOffset, textureProj, textureProjGrad, textureProjGradOffset, textureProjLod, textureProjLodOffset, textureProjOffset, textureQueryLod, textureSize
Copyright © 2011 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/.