Specialized interface for bitmaps containing half floats as their
color components. Half floats are 16 bit wide, and some high-end
GPUs already have them as supported frame buffer format. In
contrast to XHalfFloatBitmap, this interface only
permits read-only access.
Use this interface for e.g. bitmaps that are calculated
on-the-fly, or that are pure functional, and thus cannot be
modified.
Query the raw data of this bitmap, in the format as defined by
getMemoryLayout(). With the given rectangle, a subset of the
whole bitmap can be queried. When querying subsets of the
bitmap, the same scanline padding takes place as when the
whole bitmap is requested. Note: as we currently have no 16
bit float UNO data type, the values are transported as 16 bit
integers across the API (which requires casting on both
sides).
