Module offset

Module responsible for calculating the offset and span for types.

There exists two types of layouts std140 and std430 (there’s technically two more layouts, shared and packed. Shared is not supported by spirv. Packed is implementation dependent and for now it’s just implemented as an alias to std140).

The OpenGl spec (the layout rules are defined by the OpenGl spec in section 7.6.2.2 as opposed to the GLSL spec) uses the term basic machine units which are equivalent to bytes.

Structs

• TypeAlignSpan
  Struct with information needed for defining a struct member.

Functions

• calculate_offset
  Returns the type, alignment and span of a struct member according to a StructLayout.