Name
textureProjGradOffset — perform a texture lookup with projection, explicit gradients and offset
Declaration
gvec4 textureProjGradOffset( | gsampler1D | sampler, |
| vec2 | P, |
| float | dPdx, |
| float | dPdy, |
| int | offset) ; |
gvec4 textureProjGradOffset( | gsampler1D | sampler, |
| vec4 | P, |
| float | dPdx, |
| float | dPdy, |
| int | offset) ; |
gvec4 textureProjGradOffset( | gsampler2D | sampler, |
| vec3 | P, |
| vec2 | dPdx, |
| vec2 | dPdy, |
| ivec2 | offset) ; |
gvec4 textureProjGradOffset( | gsampler2D | sampler, |
| vec4 | P, |
| vec2 | dPdx, |
| vec2 | dPdy, |
| ivec2 | offset) ; |
gvec4 textureProjGradOffset( | gsampler3D | sampler, |
| vec4 | P, |
| vec3 | dPdx, |
| vec3 | dPdy, |
| ivec3 | offset) ; |
float textureProjGradOffset( | sampler1DShadow | sampler, |
| vec4 | P, |
| float | dPdx, |
| float | dPdy, |
| int | offset) ; |
float textureProjGradOffset( | sampler2DShadow | sampler, |
| vec4 | P, |
| vec2 | dPdx, |
| vec2 | dPdy, |
| ivec2 | offset) ; |
gvec4 textureProjGradOffset( | gsampler2DRect | sampler, |
| vec3 | P, |
| vec2 | dPdx, |
| vec2 | dPdy, |
| ivec2 | offset) ; |
gvec4 textureProjGradOffset( | gsampler2DRect | sampler, |
| vec4 | P, |
| vec2 | dPdx, |
| vec2 | dPdy, |
| ivec2 | offset) ; |
float textureProjGradOffset( | gsampler2DRectShadow | sampler, |
| vec4 | 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 offsets, in texels at which the texture will be sampled relative to the projection of P
.
Description
textureProjGradOffset
performs a texture lookup with projection and explicit gradients and offsets. 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 textureGradOffset,
passing dPdx
and dPdy
as gradients, and offset
as the offset.
See Also
texelFetch,
texelFetchOffset,
texture,
textureGather,
textureGatherOffset,
textureGatherOffsets,
textureGrad,
textureGradOffset,
textureLod,
textureLodOffset,
textureOffset,
textureProj,
textureProjGrad,
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/.