Re: PilOS - File I/O and OpenGL
Hi Robert, I tried saving a file (3dtext.l) to the misc directory in PilOS, but I could not see it when using the (dir misc). I am suspecting I need to write it and save it from within PilOS? You can put a file into a directory while building the PilOS image: Enter the path in pilos/lib/init.l into the global *IniFiles, and create that file in pilos/init/. All files which have a 'T' in *IniFiles are automatically 'loaded' when PilOS boots. You may also add it to 'initFiles' in pilos/Makefile, but this is needed only for the (temporal) dependency. And, yes, you can also create a file at runtime, using 'out' just like in normal PicoLisp. : (out my/path/file.l (println ...) (println ...) ..) How to add a library to PilOS such as the OpenGL one that is native to the 64bit PicoLisp distribution? Do you have to add it to the source and recreate the img file? This is rather meaningless. You can't execute a library written for Linux (or any other operating system) under PilOS. For example, you would first need the whole X11 system. Then you would need a loader program which reads those libraries into memory, relocates them, and links them with other libraries. And even then it would not work, as the calling conventions, register usage (the ABI) are different. So you must first port X11 and OpenGL to PilOS. A surely interesting task ;) ♪♫ Alex -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
Re: PilOS - File I/O and OpenGL
On Fri, Jul 24, 2015 at 04:30:53PM +0200, Alexander Burger wrote: So you must first port X11 and OpenGL to PilOS. A surely interesting task ;) .. especially as there is no C compiler yet (and probably also not in the future). So it must be done in Lisp and/or pil-assembly. Of course a full X11 is not needed. A possible first step might be getting the flight simulator (in misc/rcsim.l) up and running. The only library it uses is @lib/z3d.l which - though in C - does no more than writing single pixels into a window. This could perhaps be rewritten to write those pixels directly to the frame buffer. Still a daunting task ... ;) ♪♫ Alex -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
PilOS - File I/O and OpenGL
I tried saving a file (3dtext.l) to the misc directory in PilOS, but I could not see it when using the (dir misc). I am suspecting I need to write it and save it from within PilOS? How to add a library to PilOS such as the OpenGL one that is native to the 64bit PicoLisp distribution? Do you have to add it to the source and recreate the img file? Regards, Rob
Re: PilOS - File I/O and OpenGL
Hi Rob, I'll keep hacking away at it, since the payoffs are big for me from a learning perspective. Good :) And you brought me to the idea of porting RcSim :) I think I'll investigate that more. This should be the first real application in PilOS. When you say @lib/z3d.l is in C, if I wanted to learn how to build upon PilOS, would it be preferable to use pil-assembly or Lisp (PicoLisp, I assume)? I would start on the Lisp level. Only low-level and time-critical parts need to be done in assembly. Can I learn pil-assembly from the source files, or do you have a reference somewhere? The only reference is in doc64/asm. It describes the virtual PicoLisp machine and its instruction set. The ultimate documentation are the sources in src64/*.l and (as a modification of those) in pilos/src/*.l. ♪♫ Alex -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
