Source Code for Module toon.fx

 1  #!/usr/bin/env python 
 2  """ 
 3  Formalizing the effects. 
 4  """ 
 5  from toon import optgroup 
 6  from twisted.python import modules 
 7   
 8 -class Effect(object): 
 9      """ 
10      Video Effect base class 
11      """ 
12 -    def __init__(self): 
13          self.name = None # Must be set to a str in children classes. 
14          self.enabled = True 
15          self.loaded = False # set to False in case of error. 
16          self.options = optgroup.OptionsGroup() # to be replaced in children classes by a subclass of OptionsGroup 
17   
18 -    def setup(self): 
19          pass 
20   
21 -    def enable(self): 
22          self.enabled = True 
23   
24 -    def disable(self): 
25          self.enabled = False 
26   
27 -    def pre_draw(self): 
28          pass 
29       
30 -    def post_draw(self): 
31          pass 
32   
33   
34 -def load_effects(): 
35      """ 
36      Loads modules in the toon.effects package and returns a dict with  
37      their name as the key 
38      """ 
39      ret = {} 
40      fx_package = modules.getModule("toon.effects") 
41      for module in fx_package.iterModules(): 
42          try: 
43              loaded_module = module.load() 
44              effect = loaded_module.create_effect() 
45          except Exception, e: 
46              print("Error loading %s effect module : %s " % (module.name, e.message)) 
47              #raise 
48          else: 
49              effect.setup() 
50              if not effect.loaded: 
51                  print("Could not load effect %s." % (effect.name)) 
52              else: 
53                  ret[effect.name] = effect 
54      return ret 
55