QTeletextMaker

QTeletextMaker is a free and open-source teletext page editor, written with the cross-platform Qt 6 widget toolkit. On Linux it can be compiled from the source available on GitHub, and periodically a Windows executable is released.

Features

The editor has an emphasis on Level 2.5 enhancement editing.

It features a fully interactive X/26 Local Enhancement Data triplet editor, allowing one to enter triplets and see the enhancement effects immediately. Additionally there is a box allowing editing of X/28 enhancements such as Default Screen or Row Colours and CLUT remapping, and a palette editor.

Other features:

• Load and save teletext pages in TTI format.
• Can import and export single pages in t42 format.
• Can export a single page as a PNG image or to the edit.tf and zxnet online page editors.
• Undo and redo of editing actions.
• Configurable zoom.
• View teletext pages in 4:3, 16:9 pillar-box and 16:9 stretch aspect ratios.

The editor is bundled with some example pages demonstrating some aspects of Level 2.5 teletext and allowing one to get an idea of how X/26 enhancements are laid out and applied.

Video

QTeletextMaker was used to show the abilities of Level 2.5 teletext at the Teletext 50 event at The Centre for Computing History in Cambridge. The video demonstrates a simple example of how to lay out X/26 enhancements over a page correctly as well as how to use palettes and CLUT remapping.