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.
See Also
texelFetch,
texelFetchOffset,
texture,
textureGather,
textureGatherOffset,
textureGatherOffsets,
textureGrad,
textureLod,
textureLodOffset,
textureOffset,
textureProj,
textureProjGrad,
textureProjGradOffset,
textureProjLod,
textureProjLodOffset,
textureProjOffset,
textureQueryLod,
textureSize
Copyright
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/.