Struct ImageCoordinates 

struct ImageCoordinates {
    value_id: Word,
    type_id: Word,
    size: Option<VectorSize>,
}

Information about a vector of coordinates.

The coordinate vectors expected by SPIR-V OpImageRead and OpImageFetch supply the array index for arrayed images as an additional component at the end, whereas Naga’s ImageLoad, ImageStore, and ImageSample carry the array index as a separate field.

In the process of generating code to compute the combined vector, we also produce SPIR-V types and vector lengths that are useful elsewhere. This struct gathers that information into one place, with standard names.

Fields

value_id: Word

The SPIR-V id of the combined coordinate/index vector value.

Note: when indexing a non-arrayed 1D image, this will be a scalar.

type_id: Word

The SPIR-V id of the type of value.

size: Option<VectorSize>

The number of components in value, if it is a vector, or None if it is a scalar.