gl4java-usergroup

[gl4java-usergroup] Mac Port: Fetching Function Pointer Dynamically (FindSymbol, ...)

[Sven G. <sgo...@ja...>]

No success ...

This piece of code,
should give us the function-pointer (funcPtr) !

Purpose:
	The function ptr is achieved dynamically out of the
	OpenGL implementation ...

But: It does not work ...

Ideas ?


#include <CodeFragments.h>

void * LIBAPIENTRY getGLProcAddressHelper(const char * func, int *
method,
                                          int debug, int verbose )
{
        void * funcPtr=NULL;
        int lmethod; ...
  

#ifdef __mac_os
        /* funcPtr = GetProcAddress(func); */
        static char buffer[256];
        Ptr glLibMainAddr;
        CFragConnectionID glLibConnectId;
        CFragSymbolClass glLibSymClass;
                       GetSharedLibrary ("OpenGLLibrary",
                                          kCompiledCFragArch
/*kPowerPCCFragArch */,
                                          kStubLibraryCFrag,
                                          &glLibConnectId,
                                          &glLibMainAddr,
                                          buffer);

        printf("GetSharedLibrary errMsg: %s\n", buffer);
        fflush(NULL);

        FindSymbol      (glLibConnectId, func, &funcPtr, & glLibSymClass
);

        /* With this peace, or without,
           just getting NULL ! :-(
	
        if(glLibSymClass == kTVectorCFragSymbol)
        {
                printf("should be found: symbol class equals
kTVectSymbol\n");
        } else {
                printf("should be NOT found: symbol class NOT equals
kTVectSymbol\n");
                funcPtr = NULL;
        }
        */
        fflush(NULL);

        CloseConnection(&glLibConnectId);

        lmethod=2;

#endif                

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Re: [gl4java-usergroup] Mac Port: Fetching Function Pointer Dynamically (FindSymbol, ...)

[Sven G. <sgo...@ja...>]

... still no success:

GetSharedLibrary returns 0 -> OK !
FindSymbol returns -2802 -> cfragNoSymbolErr, symbol not found
	tried with GetSharedLibrary:
		OpenGLLibrary
		OpenGLEngine
		OpenGLRenderer
		OpenGLRendererATI

here is the source:

#ifdef macintosh
        #include <agl.h>
        #include <string.h>
        #include <CodeFragments.h>
        #include <Errors.h>

        #define fragNoErr 0
#endif  

...

#ifdef macintosh
        Str255
errName;                                                                
Ptr glLibMainAddr = 0;
        CFragConnectionID glLibConnectId = 0;
        CFragSymbolClass glLibSymClass = 0;
        OSErr returnError=fragNoErr;
        static char buffer[256];

    returnError =
                GetSharedLibrary("\pOpenGLRenderer",
                               kPowerPCCFragArch,
                               kReferenceCFrag,
                               &glLibConnectId,
                               &glLibMainAddr,
                   errName);

        printf("GetSharedLibrary errMsg: %s\n", errName);
        fflush(NULL);

        if (returnError != fragNoErr)
        {
                printf ("GetSharedLibrary Err(%d): Ahhh!  Didn't find
LIBRARY !\n",
                        returnError);
                fflush(NULL);
        }

        if (returnError == fragNoErr)
        {
                sprintf(buffer, "\p%s", func);

                returnError =
                  FindSymbol (glLibConnectId, buffer, &funcPtr, &
glLibSymClass );

                if (returnError != fragNoErr)
                {
                  printf ("GetSharedLibrary Err(%d): Ahhh!  Didn't find
SYMBOL: %s !\n",
                        returnError, func);
                  fflush(NULL);
                }
                returnError = fragNoErr; // fall back to ok mode ...
        }
        if (returnError == fragNoErr && glLibConnectId!=NULL)
        {
                returnError = CloseConnection(&glLibConnectId);

                if (returnError != fragNoErr)
                {
                  printf ("GetSharedLibrary Err(%d): Ahhh!  Didn't close
LIBRARY !\n",
                        returnError);
                  fflush(NULL);
                }
        }

        lmethod=2;

#endif

		
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Re: [gl4java-usergroup] Mac Port: Fetching Function Pointer Dynamically (FindSymbol, ...)

[Sven G. <sgo...@ja...>]

It works !

:-)

Using the OpenGLLibrary !

I have to clean up things, then I really know
in detail ... how it works :-))

E.g:
	- using c2pstrcpy (carbon stuff)
	for converting the c string to an pascal string !!

	- seeking all symbols out of the lib ...

TODO:
	Now I have to check the Privilege mechanism
	to get prviliges for the security manager to
	install and ...

	Adding the new visual capabilities like
	accumulator bits, etc (new since version 2.3.1 ...)

Later ...

Sven
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Re: [gl4java-usergroup] Mac Port: Fetching Function Pointer Dynamically (FindSymbol, ...)

[Jean-Yves B. <jea...@wa...>]

Hello Swen,

I am not sure I can help you in your Mac port but I try to compile the
previous release of GL4 (2.3.1.0) made by gerard.

To do this, I used MetroWerks Code warrior, and I rebuilt the extension.

I made this to find a bug I noticed in July about reading
the FRONT buffer that appears only on mac platform.

In the package made by gerard, there where several Metrowerks projects:
- one to build the extension,
- one to build the zip file,
- one to build some demos.

If I can help more.

Sven Goethel a *crit :

> It works !
>
> :-)
>
> Using the OpenGLLibrary !
>
> I have to clean up things, then I really know
> in detail ... how it works :-))
>
> E.g:
>         - using c2pstrcpy (carbon stuff)
>         for converting the c string to an pascal string !!
>
>         - seeking all symbols out of the lib ...
>
> TODO:
>         Now I have to check the Privilege mechanism
>         to get prviliges for the security manager to
>         install and ...
>
>         Adding the new visual capabilities like
>         accumulator bits, etc (new since version 2.3.1 ...)
>
> Later ...
>
> Sven
> --
> mailto:sgo...@ja...
> www   : http://www.jausoft.com ; pgp: http://www.jausoft.com/gpg/
> voice : +49-521-2399440, +49-170-2115963; fax: +49-521-2399442
> _______________________________________________
> gl4java-usergroup mailing list
> gl4...@li...
> http://lists.sourceforge.net/mailman/listinfo/gl4java-usergroup

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Tel: 05.62.79.03.33  Fax: 05.62.79.03.38
Mail: jea...@wa...
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