io_scene_fbx/data_types.py

   1 # SPDX-FileCopyrightText: 2006-2012 assimp team
   2 # SPDX-FileCopyrightText: 2013 Blender Foundation
   3 #
   4 # SPDX-License-Identifier: GPL-2.0-or-later
   5
   6 BOOL = b'B'[0]
   7 CHAR = b'C'[0]
   8 INT8 = b'Z'[0]
   9 INT16 = b'Y'[0]
  10 INT32 = b'I'[0]
  11 INT64 = b'L'[0]
  12 FLOAT32 = b'F'[0]
  13 FLOAT64 = b'D'[0]
  14 BYTES = b'R'[0]
  15 STRING = b'S'[0]
  16 INT32_ARRAY = b'i'[0]
  17 INT64_ARRAY = b'l'[0]
  18 FLOAT32_ARRAY = b'f'[0]
  19 FLOAT64_ARRAY = b'd'[0]
  20 BOOL_ARRAY = b'b'[0]
  21 BYTE_ARRAY = b'c'[0]
  22
  23 # Some other misc defines
  24 # Known combinations so far - supposed meaning: A = animatable, A+ = animated, U = UserProp
  25 # VALID_NUMBER_FLAGS = {b'A', b'A+', b'AU', b'A+U'}  # Not used...
  26
  27 # array types - actual length may vary (depending on underlying C implementation)!
  28 import array
  29
  30 # For now, bytes and bool are assumed always 1byte.
  31 ARRAY_BOOL = 'b'
  32 ARRAY_BYTE = 'B'
  33
  34 ARRAY_INT32 = None
  35 ARRAY_INT64 = None
  36 for _t in 'ilq':
  37     size = array.array(_t).itemsize
  38     if size == 4:
  39         ARRAY_INT32 = _t
  40     elif size == 8:
  41         ARRAY_INT64 = _t
  42     if ARRAY_INT32 and ARRAY_INT64:
  43         break
  44 if not ARRAY_INT32:
  45     raise Exception("Impossible to get a 4-bytes integer type for array!")
  46 if not ARRAY_INT64:
  47     raise Exception("Impossible to get an 8-bytes integer type for array!")
  48
  49 ARRAY_FLOAT32 = None
  50 ARRAY_FLOAT64 = None
  51 for _t in 'fd':
  52     size = array.array(_t).itemsize
  53     if size == 4:
  54         ARRAY_FLOAT32 = _t
  55     elif size == 8:
  56         ARRAY_FLOAT64 = _t
  57     if ARRAY_FLOAT32 and ARRAY_FLOAT64:
  58         break
  59 if not ARRAY_FLOAT32:
  60     raise Exception("Impossible to get a 4-bytes float type for array!")
  61 if not ARRAY_FLOAT64:
  62     raise Exception("Impossible to get an 8-bytes float type for array!")