On Thu, May 29, 2008 at 11:17:51AM +0100, Samuel Thibault wrote: > Kenny Hitt, le Thu 29 May 2008 05:06:21 -0500, a écrit : > > Normally, the difference with Braille printers is the format of the file. > > Just like any other printer.
Correct. > > > The text will need to be converted to brf first. > > Just like .pdf usually need to be converted to .ps first. It's a highly natural-language-dependent process, involving context-dependent rules as well as conversion of the input file format to appropriate page layout and formatting instructions for braille. Think of it as analogous to converting a TeX or XML file to PS or PDF, with a BRF file as equivalent to a PS or PDF file. > > > This user uses turbobraille to translate the file before printing. > > nfbtrans will also work to translate to and from brf file format. > > Then why not including them to cups? For the same reasons that Troff, TeX/LaTeX, etc., are not included. However, if Cups is given a text file, or an XML file, etc., destined for a braille device, it would be useful if the filter could run the user's chosen braille software during processing, even though that software would be a separate package from Cups. If Cups is presented with a BRF file (i.e., already prepared for braille output), it should just send it unmodified to the braille device. Options for selecting which pages to print would be useful, however. A BRF file is just an ASCII file, formatted with spaces and line-end characters, with form feeds separating the pages. I don't know whether all braille devices will accept Unix-style line endings, or whether some would require CR/LF line terminators, or indeed to what extent this is configurable. Other braille devices would need special drivers, as they don't accept BRF files directly but operate in a kind of graphic mode in which the dots have to be specified individually, together with the spacing and other details - a kind of rasterized format. Although the North American ASCII-braille correspondence is commonly implemented in braille devices, different schemes are used in Europe, and it may be necessary for the driver to be able to convert between them. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
