buffer.py 文件源码

def _update(self):
        """ Upload all pending data to GPU. """
        if self.pending_data:
            start, stop = self.pending_data
            offset, nbytes = start, stop-start
            # offset, nbytes = self.pending_data
            data = self.ravel().view(np.ubyte)[offset:offset + nbytes]
            gl.glBufferSubData(self.target, offset, nbytes, data)
        self._pending_data = None
        self._need_update = False