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TEXTUREGATHEROFFSETS(3G) | [FIXME: manual] | TEXTUREGATHEROFFSETS(3G) |
NAME¶
textureGatherOffsets - gathers four texels from a texture with an array of offsetsDECLARATION¶
gvec4
textureGatherOffsets(gsampler2D sampler,
vec2 P, ivec2 offsets[4],
[int comp]);
gvec4
textureGatherOffsets(gsampler2DArray sampler,
vec3 P, ivec2 offsets[4],
[int comp]);
gvec4
textureGatherOffsets(gsampler2DRect sampler,
vec3 P, ivec2 offsets[4],
[int comp]);
vec4
textureGatherOffsets(gsampler2DShadow sampler,
vec2 P, float refZ,
ivec2 offsets[4]);
vec4
textureGatherOffsets(gsampler2DArrayShadow sampler,
vec3 P, float refZ,
ivec2 offsets[4]);
vec4
textureGatherOffsets(gsampler2DRectShadow sampler,
vec3 P, float refZ,
ivec2 offsets[4]);
PARAMETERS¶
samplerSpecifies 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.
comp
Specifies the component of the source texture that will
be used to generate the resulting vector.
refZ
Specifies the reference Z value used in the comparison
for shadow forms.
offsets
Specifies an array of offsets from the specified texture
coordinate P from which the texels will be gathered.
DESCRIPTION¶
textureGatherOffsets operates identically to textureGatherOffset(), except that offsets is used to determine the location of the four texels to sample. Each of the four texels is obtained by applying the offset in offsets as a (u, v) coordinate offset to P, identifying the four-texel GL_LINEAR footprint, and then selecting the texel i0i0 of that footprint. The specified values in offsets must be set with constant integral expressions.VERSION SUPPORT¶
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 |
textureGatherOffsets | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
SEE ALSO¶
texelFetch(), texelFetchOffset(), texture(), textureGather(), textureGatherOffset(), textureGrad(), textureGradOffset(), textureLod(), textureLodOffset(), textureOffset(), textureProj(), textureProjGrad(), textureProjGradOffset(), textureProjLod(), textureProjLodOffset(), textureProjOffset(), textureQueryLod(), textureSize()COPYRIGHT¶
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/.COPYRIGHT¶
Copyright © 2011-2014 Khronos Group08/26/2014 | [FIXME: source] |