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"""EGL (cross-platform) platform library"""
import ctypes, ctypes.util
from OpenGL.platform import baseplatform, ctypesloader
class EGLPlatform( baseplatform.BasePlatform ):
"""EGL platform for opengl-es only platforms"""
@baseplatform.lazy_property
def GLES1(self):
try:
return ctypesloader.loadLibrary(
ctypes.cdll,
'GLESv1_CM', # ick
mode=ctypes.RTLD_GLOBAL
)
except OSError:
return None
@baseplatform.lazy_property
def GLES2(self):
try:
return ctypesloader.loadLibrary(
ctypes.cdll,
'GLESv2',
mode=ctypes.RTLD_GLOBAL
)
except OSError:
return None
@baseplatform.lazy_property
def GLES3(self):
# implementers guide says to use the same name for the DLL
return self.GLES2
@baseplatform.lazy_property
def GL(self):
try:
for name in ('OpenGL','GL'):
lib = ctypesloader.loadLibrary(
ctypes.cdll,
'GL',
mode=ctypes.RTLD_GLOBAL
)
if lib:
return lib
raise OSError("No GL/OpenGL library available")
except OSError:
return self.GLES2 or self.GLES1
@baseplatform.lazy_property
def GLU(self):
try:
return ctypesloader.loadLibrary(
ctypes.cdll,
'GLU',
mode=ctypes.RTLD_GLOBAL
)
except OSError:
return None
@baseplatform.lazy_property
def GLUT( self ):
try:
return ctypesloader.loadLibrary(
ctypes.cdll,
'glut',
mode=ctypes.RTLD_GLOBAL
)
except OSError:
return None
@baseplatform.lazy_property
def OpenGL(self): return self.GL
@baseplatform.lazy_property
def EGL(self):
# TODO: the raspberry pi crashes on trying to load EGL module
# because the EGL library requires a structure from GLES2 without
# linking to that library... Github issue is here:
# https://github.com/raspberrypi/firmware/issues/110
import os
if os.path.exists('/proc/cpuinfo'):
info = open('/proc/cpuinfo').read()
if 'BCM2708' in info or 'BCM2709' in info:
assert self.GLES2
try:
return ctypesloader.loadLibrary(
ctypes.cdll,
'EGL',
mode=ctypes.RTLD_GLOBAL
)
except OSError as err:
raise ImportError("Unable to load EGL library", *err.args)
@baseplatform.lazy_property
def getExtensionProcedure( self ):
eglGetProcAddress = self.EGL.eglGetProcAddress
eglGetProcAddress.restype = ctypes.c_void_p
return eglGetProcAddress
@baseplatform.lazy_property
def GLE( self ):
try:
return ctypesloader.loadLibrary(
ctypes.cdll,
'gle',
mode=ctypes.RTLD_GLOBAL
)
except OSError:
return None
DEFAULT_FUNCTION_TYPE = staticmethod( ctypes.CFUNCTYPE )
@baseplatform.lazy_property
def GetCurrentContext( self ):
return self.EGL.eglGetCurrentContext
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