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"""Data-type definitions for EGL/GLES"""
import ctypes
pointer = ctypes.pointer
class _Opaque( ctypes.Structure ):
"""An Opaque Structure reference (base class)"""
class _opaque_pointer( ctypes.POINTER( _Opaque ) ):
_type_ = _Opaque
@classmethod
def from_param( cls, value ):
return ctypes.cast( value, cls )
@property
def address( self ):
return ctypes.addressof( self.contents )
@property
def as_voidp( self ):
return ctypes.c_voidp( self.address )
def __hash__(self):
"""Allow these pointers to be used as keys in dictionaries"""
return self.address
def opaque_pointer_cls( name ):
"""Create an Opaque pointer class for the given name"""
typ = type( name, (_Opaque,), {} )
p_typ = type( name+'_pointer', (_opaque_pointer,), {'_type_':typ})
return p_typ
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