sample_offset

The sample_offset function samples a texture at UV coordinates plus a constant integer texel offset. Use it for small fixed kernels such as blur taps, edge detection, and neighborhood lookups that still use filtered sampling.

Live Demo

Signature

bwsl

sample_offset :: (texture2D tex, sampler samp, float2 uv, int2 offset) -> float4 {...}

Parameters

Parameter	Type	Description
`tex`	`texture2D`	Texture to sample
`samp`	`sampler`	Sampler state
`uv`	`float2`	Texture coordinates
`offset`	`int2`	Integer texel offset applied to the sample

Return Value

Returns the filtered sample value from the offset texture coordinate.

Example

bwsl

float4 center = sample(resources.albedo, resources.albedoSampler, uv);
float4 right = sample_offset(resources.albedo, resources.albedoSampler, uv, int2(1, 0));
float4 up = sample_offset(resources.albedo, resources.albedoSampler, uv, int2(0, 1));

Compiled Output

When compiled to GLSL:

glsl

textureOffset(tex, uv, offset)

Test sample_offset in a live shader