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Runtime error
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from ctypes import *
from typing import Any, Callable
import pyglet.lib
from pyglet.gl.lib import missing_function, decorate_function
from pyglet.util import asbytes
__all__ = ['link_GL', 'link_GLX']
gl_lib = pyglet.lib.load_library('GL')
# Look for glXGetProcAddressARB extension, use it as fallback (for ATI fglrx and DRI drivers).
try:
glXGetProcAddressARB = getattr(gl_lib, 'glXGetProcAddressARB')
glXGetProcAddressARB.restype = POINTER(CFUNCTYPE(None))
glXGetProcAddressARB.argtypes = [POINTER(c_ubyte)]
_have_getprocaddress = True
except AttributeError:
_have_getprocaddress = False
def link_GL(name, restype, argtypes, requires=None, suggestions=None) -> Callable[..., Any]:
try:
func = getattr(gl_lib, name)
func.restype = restype
func.argtypes = argtypes
decorate_function(func, name)
return func
except AttributeError:
if _have_getprocaddress:
# Fallback if implemented but not in ABI
bname = cast(pointer(create_string_buffer(asbytes(name))), POINTER(c_ubyte))
addr = glXGetProcAddressARB(bname)
if addr:
ftype = CFUNCTYPE(*((restype,) + tuple(argtypes)))
func = cast(addr, ftype)
decorate_function(func, name)
return func
return missing_function(name, requires, suggestions)
link_GLX = link_GL
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