Well, Achim you were almost exactly correct. I have a functional function interface in about half an hour's worth of work. I have one question, which is how to create a Ptr to four CFloats on the fly, pass them to the bounding box functions, and then come back out with a [Float]
My prototype looks like this: foreign import ccall unsafe "ftglGetFontBBox" fgetFontBBox :: Font -> CString -> Ptr CFloat -> IO () the ptr to cfloat should be a float[4], which is modified inside the original C function. On Fri, Jun 20, 2008 at 1:16 AM, Achim Schneider <[EMAIL PROTECTED]> wrote: > "Jefferson Heard" <[EMAIL PROTECTED]> wrote: > > > I've been looking for awhile now for a simple way to get truetype > > fonts into my visualizations so I can abandon the hideous GLUT fonts > > and make things that look like they were developed in the 1990s > > instead of back in the days of TRON. I found FTGL, but I'm mostly a > > Haskell developer these days, and resent having to go back to C just > > to write a simple application. > > > > So I was wondering if anyone had ever wrapped the FTGL library in > > Haskel FFI or whether those out there who are experts on the FFI > > think at first glance it should be readily wrappable by a rank > > amateur at FFI such as myself. > > > > http://ftgl.sourceforge.net/docs/html/ > > > Using the FFI is generally straight forward, as long as you can live > with using the IO monad and the C code uses objects (well, > pointers to structs passed as first argument, where's the > difference...). > > Things only depend on the purity of the C code and how high-level you > want your interface to be. In this case, I estimate half an hour if > you're a fast typist. That includes the time needed to read the FFI > docs. > > -- > (c) this sig last receiving data processing entity. Inspect headers for > past copyright information. All rights reserved. Unauthorised copying, > hiring, renting, public performance and/or broadcasting of this > signature prohibited. > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > -- I try to take things like a crow; war and chaos don't always ruin a picnic, they just mean you have to be careful what you swallow. -- Jessica Edwards
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