Name
textureProjOffset — perform a texture lookup with projection and offset
Declaration
gvec4 textureProjOffset( | gsampler1D | sampler, |
| vec2 | P, |
| int | offset, |
| [float | bias]) ; |
gvec4 textureProjOffset( | gsampler1D | sampler, |
| vec4 | P, |
| int | offset, |
| [float | bias]) ; |
gvec4 textureProjOffset( | gsampler2D | sampler, |
| vec3 | P, |
| ivec2 | offset, |
| [float | bias]) ; |
gvec4 textureProjOffset( | gsampler2D | sampler, |
| vec4 | P, |
| ivec2 | offset, |
| [float | bias]) ; |
gvec4 textureProjOffset( | gsampler3D | sampler, |
| vec4 | P, |
| ivec3 | offset, |
| [float | bias]) ; |
float textureProjOffset( | sampler1DShadow | sampler, |
| vec4 | P, |
| int | offset, |
| [float | bias]) ; |
float textureProjOffset( | sampler2DShadow | sampler, |
| vec4 | P, |
| ivec2 | offset, |
| [float | bias]) ; |
gvec4 textureProjOffset( | gsampler2DRect | sampler, |
| vec3 | P, |
| ivec2 | offset) ; |
gvec4 textureProjOffset( | gsampler2DRect | sampler, |
| vec4 | P, |
| ivec2 | offset) ; |
float textureProjOffset( | gsampler2DRectShadow | sampler, |
| vec4 | P, |
| 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 the texture will be sampled.
offset
Specifies the offset that is applied to P
before sampling occurs.
bias
Specifies an optional bias to be applied during level-of-detail computation.
Description
textureProjOffset
performs a texture lookup with projection. 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 textureOffset,
with the offset
used to offset the computed texture coordinates.
See Also
texelFetch,
texelFetchOffset,
texture,
textureGather,
textureGatherOffset,
textureGatherOffsets,
textureGrad,
textureGradOffset,
textureLod,
textureLodOffset,
textureOffset,
textureProj,
textureProjGrad,
textureProjGradOffset,
textureProjLod,
textureProjLodOffset,
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/.