Celestia Forums

Is there any tool for examining txf-files?

OR

Can anybody tell the width of default (and other?) cel font characters in pixel?

maxim

The tools available on Mark Kilgard's site don't work with Celestia's txf files. But I'm working on getting a working version to add a preview to the font generator.

A txf file preview is now available here.

Christophe wrote:A txf file preview is now available here.

Cool, seems to work for small TXF's. Jumbo (2k+) TXF's containing lots of CJK characters
seem to break it. I suppose though that this is just further proof that Celestia itself
needs a more scalable font system that can handle 2k+ CJK fonts. Something that
doesn't require loading one giant font texture at once. I've been thinking along the lines of
Celestia storing the texture as little strips, might be a little slower to render but should
be much more scalable.

Well, I wasn't particularly cautious with the memory handling, so that may explain why the preview doesn't work with large textures.

The solution to rendering CJK fonts might be to use a different library like FTGL which can render TTF fonts directly. But I don't know how it performs with fonts with a large number of glyphs.

Merci Christophe, pour cet outil g?©nial!

Enfin un program qui permet la conversion des txf sous windows.

(il y a quelques semaines il fallait encore installer un Linux, apprendre a manipuler ttf2txf etc. -une bonne journ?©e-, maintenant voici en 10 secondes le txf qui me faut, pas mal!)

Zolt??n

Thanks Christophe - I'll give it a try.

No one who knows the dimensions of the characters? I mean - they have to be cut out to display them on the screen. There must be an information about the sizes anywhere for that.

maxim

Yes, the font geometry information is stored in the txf along the texture.

Have a look at the src/celtxf/texturefont.cpp source file. TextureFont::load should make it clear how to retreive that information.

Ok, I see.

So no ready-to-use default charsize table for use in a lua-textprocessing-function - beside writing my own tool to retrieve one?

maxim

Well, making TextureFont::getWidth available to Lua scripts doesn't seem all that difficult if that's all you need.

In fact that would be the optimal solution.

maxim

OK, I'll see what I can do. Do you compile your own version from cvs or do you use the pre-release?

Both. Depends if I am testing, or creating mainstream stuff.

maxim

I've added a celestia:gettextwidth(string) method.

It returns the width of the string in pixels, you need to divide that by celestia:gettextwidth("M") to get the em units used by celestia:print.