Source

glLoadGen / data / gl_specloaderfunc.lua

Jason McKesson ab57c4d 




















































Jason McKesson b5c722f 
Jason McKesson ab57c4d 

Jason McKesson b5c722f 
Jason McKesson ab57c4d 
Jason McKesson c788eae 
Jason McKesson ab57c4d 









Jason McKesson c788eae 
Jason McKesson ab57c4d 

Jason McKesson c788eae 
Jason McKesson ab57c4d 




Jason McKesson c788eae 
Jason McKesson ab57c4d 











Jason McKesson 34819ad 
Jason McKesson ab57c4d 


--[[ The function pointer loading function takes a string and returns either NULL or a valid pointer. It is the responsibility of the loader to take care of any platform-specific oddities in pointer fetching.
]]

return [====[
#if defined(__APPLE__)
#include <mach-o/dyld.h>

static void* AppleGLGetProcAddress (const GLubyte *name)
{
  static const struct mach_header* image = NULL;
  NSSymbol symbol;
  char* symbolName;
  if (NULL == image)
  {
    image = NSAddImage("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL", NSADDIMAGE_OPTION_RETURN_ON_ERROR);
  }
  /* prepend a '_' for the Unix C symbol mangling convention */
  symbolName = malloc(strlen((const char*)name) + 2);
  strcpy(symbolName+1, (const char*)name);
  symbolName[0] = '_';
  symbol = NULL;
  /* if (NSIsSymbolNameDefined(symbolName))
	 symbol = NSLookupAndBindSymbol(symbolName); */
  symbol = image ? NSLookupSymbolInImage(image, symbolName, NSLOOKUPSYMBOLINIMAGE_OPTION_BIND | NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR) : NULL;
  free(symbolName);
  return symbol ? NSAddressOfSymbol(symbol) : NULL;
}
#endif /* __APPLE__ */

#if defined(__sgi) || defined (__sun)
#include <dlfcn.h>
#include <stdio.h>

static void* SunGetProcAddress (const GLubyte* name)
{
  static void* h = NULL;
  static void* gpa;

  if (h == NULL)
  {
    if ((h = dlopen(NULL, RTLD_LAZY | RTLD_LOCAL)) == NULL) return NULL;
    gpa = dlsym(h, "glXGetProcAddress");
  }

  if (gpa != NULL)
    return ((void*(*)(const GLubyte*))gpa)(name);
  else
    return dlsym(h, (const char*)name);
}
#endif /* __sgi || __sun */

#if defined(_WIN32)

#ifdef _MSC_VER
#pragma warning(disable: 4055)
#pragma warning(disable: 4054)
#endif

static int TestPointer(const PROC pTest)
{
	ptrdiff_t iTest;
	if(!pTest) return 0;
	iTest = (ptrdiff_t)pTest;
	
	if(iTest == 1 || iTest == 2 || iTest == 3 || iTest == -1) return 0;
	
	return 1;
}

static PROC WinGetProcAddress(const char *name)
{
	HMODULE glMod = NULL;
	PROC pFunc = wglGetProcAddress((LPCSTR)name);
	if(TestPointer(pFunc))
	{
		return pFunc;
	}
	glMod = GetModuleHandleA("OpenGL32.dll");
	return (PROC)GetProcAddress(glMod, (LPCSTR)name);
}
	
#define IntGetProcAddress(name) WinGetProcAddress(name)
#else
	#if defined(__APPLE__)
		#define IntGetProcAddress(name) AppleGLGetProcAddress(name)
	#else
		#if defined(__sgi) || defined(__sun)
			#define IntGetProcAddress(name) SunGetProcAddress(name)
		#else /* GLX */
		    #include <GL/glx.h>

			#define IntGetProcAddress(name) (*glXGetProcAddressARB)((const GLubyte*)name)
		#endif
	#endif
#endif
]====]