AKTIVE, Andreas Kupries's Tcl Image Vector Extension is yet another attempt
at creating an image processing package for Tcl, which started out with
CRIMP (CRItcl IMage Processor).
It started as an experiment in massive code generation, both Tcl and C, converting operator specifications written in a custom DSL into a functional Tcl extension.
This experiment looks to be a success and worthy of continuing.
At the moment the sources are split, after code generation, into
- 2% DSL implementation/converter (Tcl),
- 8% runtime (C),
- 13% operator specifications (Tcl DSL), and
- 77% generated code (C).
implementing a few hundred operators in 6 major sections.
The internals are somewhat inspired by VIPS.
In the sense that AKTIVE's runtime enables the same thing that VIPS does, the multi-threaded, concurrent handling of multiple input regions without having to load the entirety of the inputs into memory.
The detailed structures are very different from VIPS however, for several reasons:
-
This is a Tcl extension, linked to and using Tcl API functions and structures.
-
No support for multiple integer types, etc. for pixel values. The only type used internally is double.