1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
"""OSMesa-specific features
To request an OSMesa context, you need to run your script with:
PYOPENGL_PLATFORM=osmesa
defined in your shell/execution environment.
"""
import ctypes, ctypes.util
from OpenGL.platform import baseplatform, ctypesloader
from OpenGL.constant import Constant
from OpenGL.raw.osmesa import _types
class OSMesaPlatform( baseplatform.BasePlatform ):
"""OSMesa implementation for PyOpenGL"""
EXPORTED_NAMES = baseplatform.BasePlatform.EXPORTED_NAMES[:] + [
'OSMesa',
]
@baseplatform.lazy_property
def GL(self):
try:
return ctypesloader.loadLibrary(
ctypes.cdll,
'OSMesa',
mode=ctypes.RTLD_GLOBAL
)
except OSError as err:
raise ImportError("Unable to load OpenGL library", *err.args)
@baseplatform.lazy_property
def GLU(self):
try:
return ctypesloader.loadLibrary(
ctypes.cdll,
'GLU',
mode=ctypes.RTLD_GLOBAL
)
except OSError as err:
return None
@baseplatform.lazy_property
def GLUT( self ):
try:
return ctypesloader.loadLibrary(
ctypes.cdll,
'glut',
mode=ctypes.RTLD_GLOBAL
)
except OSError as err:
return None
@baseplatform.lazy_property
def GLE( self ):
try:
return ctypesloader.loadLibrary(
ctypes.cdll,
'gle',
mode=ctypes.RTLD_GLOBAL
)
except OSError as err:
return None
@baseplatform.lazy_property
def OSMesa( self ): return self.GL
DEFAULT_FUNCTION_TYPE = staticmethod( ctypes.CFUNCTYPE )
@baseplatform.lazy_property
def GetCurrentContext( self ):
function = self.OSMesa.OSMesaGetCurrentContext
function.restype = _types.OSMesaContext
return function
@baseplatform.lazy_property
def CurrentContextIsValid( self ): return self.GetCurrentContext
@baseplatform.lazy_property
def getExtensionProcedure( self ):
function = self.OSMesa.OSMesaGetProcAddress
function.restype = ctypes.c_void_p
return function
def getGLUTFontPointer( self, constant ):
"""Platform specific function to retrieve a GLUT font pointer
GLUTAPI void *glutBitmap9By15;
#define GLUT_BITMAP_9_BY_15 (&glutBitmap9By15)
Key here is that we want the addressof the pointer in the DLL,
not the pointer in the DLL. That is, our pointer is to the
pointer defined in the DLL, we don't want the *value* stored in
that pointer.
"""
name = [ x.title() for x in constant.split( '_' )[1:] ]
internal = 'glut' + "".join( [x.title() for x in name] )
pointer = ctypes.c_void_p.in_dll( self.GLUT, internal )
return ctypes.c_void_p(ctypes.addressof(pointer))
|
