| | """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)) |
| |
|
