IrIntrinsic

Sample a texture through a sampler, at the level of detail the derivatives imply.

Sample a texture through a sampler at a stated level of detail. Separate from SampleTexture rather than an optional operand, because the two are different instructions in both targets and only this one is legal outside a fragment stage.

Sample a texture through a sampler at a level of detail the caller's own gradients imply.

Fetch a texel by integer coordinate.

The size of one mip level of a texture, in texels.

Read one texel of a storage image. No sampler and no filtering.

Write one texel of a storage image. The only intrinsic that returns nothing.

The size of a storage image, which has exactly one level.

The same bits read as another type of the same width — asfloat and friends. One opcode rather than one per pair: the instruction carries both types already.

Number of elements in an array.

Waits until every invocation of the workgroup has reached this point, and until every write to workgroup storage made before it is visible to all of them.

Orders this invocation's writes to workgroup storage against its later reads, without waiting for anybody.

Runs one whole ray query against an acceleration structure: scene.Trace(origin, tmin, direction, tmax). Arguments are [structure, origin, tmin, direction, tmax] — the receiver first, like every member intrinsic.