texture_and_sampler_let

Check navigator.gpu?.wgslLanguageFeatures?.has('texture_and_sampler_let') before choosing a shader that uses this language feature. It is available automatically when supported; requires texture_and_sampler_let; documents the dependency and rejects the shader on unsupported implementations. This language token is not a requiredFeatures entry for requestDevice(); any additional device requirements are described below.

This language extension allows a let declaration to hold a texture or sampler value. A function can give a bound resource a local alias, such as let source = inputTexture;, and use that alias in texture operations.

This is useful in generated shaders and material code where an intermediate name makes resource use clearer. A texture or sampler value is a handle to a resource: assigning it to a local name does not duplicate texels, allocate a new texture, or create another bind-group entry.

It does not make textures and samplers general-purpose numeric data or permit arbitrary mutable resource variables and resource arrays. Normal resource types and binding requirements still apply. Without the extension, refer to the original binding directly or pass the resource through a supported texture or sampler function parameter.