Name

textureOffset — perform a texture lookup with offset

Declaration

gvec4 textureOffset(gsampler1D  sampler,
 float  P,
 int  offset,
 [float  bias]);
gvec4 textureOffset(gsampler2D  sampler,
 vec2  P,
 ivec2  offset,
 [float  bias]);
gvec4 textureOffset(gsampler3D  sampler,
 vec3  P,
 ivec3  offset,
 [float  bias]);
gvec4 textureOffset(gsampler2DRect  sampler,
 vec2  P,
 ivec2  offset);
float textureOffset(sampler2DRectShadow  sampler,
 vec3  P,
 ivec2  offset);
float textureOffset(sampler1DShadow  sampler,
 vec3  P,
 int  offset,
 [float  bias]);
float textureOffset(sampler2DShadow  sampler,
 vec4  P,
 ivec2  offset,
 [float  bias]);
gvec4 textureOffset(gsampler1DArray  sampler,
 vec2  P,
 int  offset,
 [float  bias]);
gvec4 textureOffset(gsampler2DArray  sampler,
 vec3  P,
 ivec2  offset,
 [float  bias]);
float textureOffset(sampler1DArrayShadow  sampler,
 vec3  P,
 int  offset);
float textureOffset(sampler2DArrayShadow  sampler,
 vec4  P,
 vec2  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.

offset

Specifies offset, in texels that will be applied to P before looking up the texel.

Description

textureOffset performs a texture lookup at coordinate P from the texture bound to sampler with an an additional offset, specified in texels in offset that will be applied to the (u, v, w) texture coordinates before looking up each texel. The offset value must be a constant expression. A limited range of offset values are supported; the minimum and maximum offset values are implementation-dependent and may be determined by querying GL_MIN_PROGRAM_TEXEL_OFFSET and GL_MAX_PROGRAM_TEXEL_OFFSET, respectively.

Note that offset does not apply to the layer coordinate for texture arrays. Also note that offsets are not supported for cube maps.

Version Support

FunctionVersion 1.10Version 1.20Version 1.30Version 1.40Version 1.50Version 3.30Version 4.00Version 4.10Version 4.20Version 4.30
textureOffset--YYYYYYYY
textureOffset (gsampler2DRect{Shadow})---YYYYYYY

See Also

texelFetch, texelFetchOffset, texture, textureGather, textureGatherOffset, textureGatherOffsets, textureGrad, textureGradOffset, textureLod, textureLodOffset, textureProj, textureProjGrad, textureProjGradOffset, textureProjLod, textureProjLodOffset, textureProjOffset, textureQueryLod, textureSize

Copyright

Copyright © 2011-2012 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/.