Source Code for Module glitter.shaders.attribute

  1  """Descriptors for L{ShaderProgram} attributes. 
  2   
  3  End users should typically not need to use this module directly. 
  4   
  5  @bug: Attributes are currently unimplemented. 
  6   
  7  @author: Stephan Wenger 
  8  @date: 2012-02-29 
  9  """ 
 10   
 11  from collections import OrderedDict as _odict 
 12   
 13 -class BaseAttribute(object): 
 14      pass 
 15   
 16 -class Attribute(BaseAttribute): 
 17 -    def __init__(self, name, location, dtype, size, parent): 
 18          self.name = name 
 19          self.location = location 
 20          self.dtype = dtype 
 21          self.size = size 
 22          self.parent = parent 
 23   
 24 -    def __repr__(self): 
 25          if self.size == 1: 
 26              return "%s %s;" % (self.dtype, self.name) 
 27          else: 
 28              return "%s %s[%d];" % (self.dtype, self.name, self.size) 
 29   
 30 -    def __str__(self): 
 31          return "in %r" % self 
 32   
 33 -    def __get__(self, obj, cls=None): 
 34          """@todo: Implement this.""" 
 35          raise NotImplementedError 
 36   
 37 -    def __set__(self, obj, value): 
 38          """@todo: Implement this: if the shader is currently bound, set the attribute at once, else store only.""" 
 39          raise NotImplementedError 
 40   
 41 -    def _on_bind(self): 
 42          """@todo: Implement this: call C{glVertexAttrib} with C{index=self._location}.""" 
 43          pass 
 44   
 45 -    def _on_release(self): 
 46          """@todo: Implement this: restore old vertex attrib values if possible.""" 
 47          pass 
 48   
 49 -class AttributeStruct(_odict, BaseAttribute): 
 50 -    def __init__(self, name, parent): 
 51          super(AttributeStruct, self).__init__() 
 52          self.name = name 
 53          self.parent = parent 
 54   
 55 -    def __repr__(self): 
 56          return "struct { %s } %s;" % (" ".join(str(value) for value in self.values()), self.name) 
 57   
 58 -    def __str__(self): 
 59          return "in %r" % self 
 60   
 61 -    def __get__(self, obj, cls=None): 
 62          """@todo: Implement this.""" 
 63          raise NotImplementedError 
 64   
 65 -    def __set__(self, obj, value): 
 66          """@todo: Implement this.""" 
 67          raise NotImplementedError 
 68   
 69 -    def _on_bind(self): 
 70          """@todo: Implement this: call C{glVertexAttrib} with C{index=self._location}.""" 
 71          pass 
 72   
 73 -    def _on_release(self): 
 74          """@todo: Implement this: restore old vertex attrib values if possible.""" 
 75          pass 
 76   
 77 -class AttributeStructArray(_odict, BaseAttribute): 
 78 -    def __init__(self, name, parent): 
 79          super(AttributeStructArray, self).__init__() 
 80          self.name = name 
 81          self.parent = parent 
 82   
 83      @property 
 84 -    def size(self): 
 85          return max(index for index, field in self.keys()) + 1 
 86   
 87 -    def __repr__(self): 
 88          unique_values = _odict((field, value) for ((index, field), value) in self.items()) 
 89          return "struct { %s } %s[%d];" % (" ".join(repr(value) for value in unique_values.values()), self.name, self.size) 
 90   
 91 -    def __str__(self): 
 92          return "in %r" % self 
 93   
 94 -    def __get__(self, obj, cls=None): 
 95          """@todo: Implement this.""" 
 96          raise NotImplementedError 
 97   
 98 -    def __set__(self, obj, value): 
 99          """@todo: Implement this.""" 
100          raise NotImplementedError 
101   
102 -    def _on_bind(self): 
103          """@todo: Implement this: call C{glVertexAttrib} with C{index=self._location}.""" 
104          pass 
105   
106 -    def _on_release(self): 
107          """@todo: Implement this: restore old vertex attrib values if possible.""" 
108          pass 
109