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.
| 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 |
| textureGrad | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| textureGrad (gsampler2DRect{Shadow}) | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| textureGrad (gsamplerCubeArray) | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
texelFetch, texelFetchOffset, texture, textureGather, textureGatherOffset, textureGatherOffsets, textureGradOffset, textureLod, textureLodOffset, textureOffset, textureProj, textureProjGrad, textureProjGradOffset, textureProjLod, textureProjLodOffset, textureProjOffset, textureQueryLod, textureSize
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/.