ntkThemed is a new implementation of Tk widgets based on OpenGL ES 2.0 and itcl-ng. For displaying texts, which are not part of OpenGL ES, a package gles2 was implemented based on FreeType fonts, which also includes the Tcl wrappers for calling the gl* methods.
The goal behind the implementation is to have some Tk available on mobile devices like Android based or iOS based devices.
The benefit of using OpenGL ES is: it is available for Android, iOS and even as base below webgl. And OpenGL itself is a superset of OpenGL ES.
This is work in progress (WIP) and has shortly been presented on the Twentieth Annual Tcl/Tk Conference (2013) during a WIP session.
ARR This is very interesting, are there any demo files for download to get a personal impression? How can I contribute?
apw 2013-10-27: the repository for ntkThemed is still called ntk and can be found here (RS same day: domain not found) (apw 2013-10-29 should be fixed now)
I can give you write permission, if you are interested. There are a lot of missing commands for the available widgets, and the gles2 package including FreeType fonts have to be ported to Java for Android and to Objective C for iOS. The current version is running in an OpenGL ES emulator on linux (OpenSuSe 12.3).
apw 2014-02-09: First Tcl command (clearbuffer) implemented and running for Android APWTCL (Java) based on OpenGL ES 2.0. This includes the base code for implementing a package named TclGles20 (about 700 LOC in Java). The TclGles20 commands are the base for ttk like widgets implemented in itcl-ng based on OpenGL ES 2.0.