Huw D M Davies <[EMAIL PROTECTED]> wrote:
>> Who can add support for DBCS and Unicode fonts to x11drv or help with it?
>
>This is something we need to sort out. Adding Unicode support is in
>principle very easy. In X11DRV_FONT_SelectObject we just try to
>create a physical font with a iso10646-1 encoding, if this fails we
>should fallback onto the current scheme. The big problem with this is
>that the XServer renders all glyphs at font open time to calculate the
>metrics - this can take a long time with large encodings, which would
>be annoying if we're just trying to render something in iso8859-1 for
>example.
Yes, you already debated that with Alex Korobka.
>So we should probably initially create a physical font with an
>encoding that matches the charset of the logical font (as we do at
>present) and then re-create physical fonts with a larger encoding
>during the processing of ExtTextOut if we need chars that lie outside
>the initial encoding. The simplest way would be to just open the full
>Unicode version of the font in this case. X11 lets open a font by
>specifying ranges of indicies which would be an improvement worth
>adding later (sorry forgotten the details of this). Of course if the
>font doesn't have a Unicode encoding then we're stuck.
Though common principles are wise, but implementing that is an another
issue. Sorry, this is a X11 specific stuff with which I am not familiar.
>As for DBCS; X11DRV_ExtTextOut really doesn't know about this. It
>gets a Unicode string at that's that. All the Windows CP stuff should
>have been turned to Unicode before this. Now of course there may be 2
>byte x11-fonts that aren't Unicode that we should support - I'd be
>tempted to push for these fonts to get a Unicode encoding though.
Thank you. I think that the first step should be to add unicode support.
Dmitry.
