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TEXTUREOFFSET(3G) | [FIXME: manual] | TEXTUREOFFSET(3G) |
NAME¶
textureOffset - perform a texture lookup with offsetDECLARATION¶
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¶
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.
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¶
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 |
textureOffset | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
textureOffset (gsampler2DRect{Shadow}) | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
SEE ALSO¶
texelFetch(), texelFetchOffset(), texture(), textureGather(), textureGatherOffset(), textureGatherOffsets(), textureGrad(), textureGradOffset(), textureLod(), textureLodOffset(), 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 © 2012-2014 Khronos Group08/26/2014 | [FIXME: source] |