Ejemplo n.º 1
0
    def __init__(self, size, chunk_size, ctype='float'):
        """Create a new buffer of n chunks.

        Parameters:
            size: number of chunks
            chunk_size: size of each chunk
            ctype: string of the C type to use (defaults to float)
        """
        self.count = 0                # current number of chunks
        self.size = size              # max number of chunks
        self.chunk_size = chunk_size  # size of chunks
        self.ctype = ctype
        self.data = self._allocate(size)
        self.ctype_size = sizeof(self.data[0:1])
Ejemplo n.º 2
0
 def load(self, data, size=None):
     """Data is cffi array"""
     self.bind()
     if size is None:
         # ffi's sizeof understands arrays
         size = sizeof(data)
     if size == self.buffer_size:
         # same size - no need to allocate new buffer, just copy
         glBufferSubData(self.array_type, 0, size, to_raw_pointer(data))
     else:
         # buffer size has changed - need to allocate new buffer in the GPU
         glBufferData(self.array_type, size, to_raw_pointer(data),
                      self.draw_type)
         self.buffer_size = size
     self.unbind()
Ejemplo n.º 3
0
 def load(self, data, size=None):
     """Data is cffi array"""
     self.bind()
     if size is None:
         # ffi's sizeof understands arrays
         size = sizeof(data)
     if size == self.buffer_size:
         # same size - no need to allocate new buffer, just copy
         glBufferSubData(
             self.array_type,
             0,
             size,
             to_raw_pointer(data)
         )
     else:
         # buffer size has changed - need to allocate new buffer in the GPU
         glBufferData(
             self.array_type,
             size,
             to_raw_pointer(data),
             self.draw_type
         )
         self.buffer_size = size
     self.unbind()