def _CreateProgramAndShaders(self):
# clear any old programs and shaders
if self._programId < 0:
return
# clear to be sure
self.DestroyGl()
if not self._fragmentCode and not self._vertexCode:
self._programId = -1 # don't make a shader object
return
try:
# create program object
self._programId = gla.glCreateProgramObjectARB()
# the two shaders
codes = [self._fragmentCode, self._vertexCode]
types = [gl.GL_FRAGMENT_SHADER, gl.GL_VERTEX_SHADER]
for code, type in zip(codes, types):
# only attach shaders that do something
if not code:
continue
# create shader object
myshader = gla.glCreateShaderObjectARB(type)
self._shaderIds.append(myshader)
# Set its source, pyopengl accepts the code as a string.
gla.glShaderSourceARB(myshader, [code])
# compile shading code
gla.glCompileShaderARB(myshader)
# If it went well, attach!
if self._CheckForErrors(myshader, True, False):
self._programId = -1
return
else:
gla.glAttachObjectARB(self._programId, myshader)
# link shader and check for errors
gla.glLinkProgramARB(self._programId)
if self._CheckForErrors(self._programId, False, True):
self._programId = -1
except Exception:
self._programId = -1
why = str(getExceptionInstance())
print("Unable to initialize shader code. %s" % why)
def _CreateProgramAndShaders(self):
# clear any old programs and shaders
if self._programId < 0:
return
# clear to be sure
self.DestroyGl()
if not self._fragmentCode and not self._vertexCode:
self._programId = -1 # don't make a shader object
return
try:
# create program object
self._programId = gla.glCreateProgramObjectARB()
# the two shaders
codes = [self._fragmentCode, self._vertexCode]
types = [gl.GL_FRAGMENT_SHADER, gl.GL_VERTEX_SHADER]
for code, type in zip(codes, types):
# only attach shaders that do something
if not code:
continue
# create shader object
myshader = gla.glCreateShaderObjectARB(type)
self._shaderIds.append(myshader)
# Set its source, pyopengl accepts the code as a string.
gla.glShaderSourceARB(myshader, [code])
# compile shading code
gla.glCompileShaderARB(myshader)
# If it went well, attach!
if self._CheckForErrors(myshader, True, False):
self._programId = -1
return
else:
gla.glAttachObjectARB(self._programId, myshader)
# link shader and check for errors
gla.glLinkProgramARB(self._programId)
if self._CheckForErrors(self._programId, False, True):
self._programId = -1
except Exception:
self._programId = -1
why = str(getExceptionInstance())
print("Unable to initialize shader code. %s" % why)
def _loadBackend(name):
""" Load the backend with the specified name.
Returns True on success and False otherwise.
"""
# Get module names
modName = 'backend_' + name
modNameFull = 'visvis.backends.backend_' + name
modFileName = os.path.join(os.path.dirname(__file__), modName + '.py')
# Test whether to use the pyc version
load_module = imp.load_source
if not os.path.isfile(modFileName):
modFileName += "c" # Probably a frozen app
# Try importing the backend toolkit
try:
modNameTk = backendMap[name]
__import__(modNameTk)
except ImportError:
return False
# Try importing the visvis backend module
try:
if modFileName.endswith('.pyc'):
module = __import__(modNameFull, fromlist=[modName])
else:
module = imp.load_source(modNameFull, modFileName)
globals()[modName] = module
except Exception:
if not isFrozen():
# Only show if not frozen. If frozen, it can easily happen that
# the GUI toolkit is available, but the visvis backend is not.
why = str(getExceptionInstance())
print('Error importing %s backend: %s' % (name, why))
return False
# Do some tests
if not hasattr(module, 'newFigure'):
raise Exception("Backend %s does not implement newFigure!" % be)
elif not hasattr(module, 'Figure'):
raise Exception("Backend %s does not implement Figure class!" % be)
else:
# All good (as far as I can tell). Update stuff if name does not match.
module.app._backend = name
if currentBackend.name != name:
currentBackend.name = name
currentBackend.newFigure = module.newFigure
currentBackend.app = module.app
return True
def _loadBackend(name):
""" Load the backend with the specified name.
Returns True on success and False otherwise.
"""
# Get module names
modName = 'backend_' + name
modNameFull = 'visvis.backends.backend_'+name
modFileName = os.path.join(os.path.dirname(__file__), modName+'.py')
# Test whether to use the pyc version
load_module = imp.load_source
if not os.path.isfile(modFileName):
modFileName += "c" # Probably a frozen app
# Try importing the backend toolkit
try:
modNameTk = backendMap[name]
__import__(modNameTk)
except ImportError:
return False
# Try importing the visvis backend module
try:
if modFileName.endswith('.pyc'):
module = __import__(modNameFull, fromlist=[modName])
else:
module = imp.load_source(modNameFull, modFileName)
globals()[modName] = module
except Exception:
if not isFrozen():
# Only show if not frozen. If frozen, it can easily happen that
# the GUI toolkit is available, but the visvis backend is not.
why = str(getExceptionInstance())
print('Error importing %s backend: %s' % (name, why))
return False
# Do some tests
if not hasattr(module,'newFigure'):
raise Exception("Backend %s does not implement newFigure!" % be)
elif not hasattr(module,'Figure'):
raise Exception("Backend %s does not implement Figure class!" % be)
else:
# All good (as far as I can tell). Update stuff if name does not match.
module.app._backend = name
if currentBackend.name != name:
currentBackend.name = name
currentBackend.newFigure = module.newFigure
currentBackend.app = module.app
return True
