text: # -*- coding: utf-8 -*-
  """
  GoPro Colourspaces
  ==================
  
  Defines the *GoPro* colourspaces:
  
  -   :attr:`colour.models.RGB_COLOURSPACE_PROTUNE_NATIVE`.
  
  Notes
  -----
  -   The *Protune Native* colourspace primaries were derived using the method
      outlined in :cite:`Mansencal2015d` followed with a chromatic adaptation
      step to *CIE Standard Illuminant D Series D65* using
      :func:`colour.chromatically_adapted_primaries` definition.
  
  References
  ----------
  -   :cite:`GoPro2016a` : GoPro, Duiker, H.-P., & Mansencal, T. (2016).
      gopro.py. Retrieved April 12, 2017, from
      https://github.com/hpd/OpenColorIO-Configs/blob/master/aces_1.0.3/python/\
  aces_ocio/colorspaces/gopro.py
  -   :cite:`Mansencal2015d` : Mansencal, T. (2015). RED Colourspaces Derivation.
      Retrieved May 20, 2015, from
      https://www.colour-science.org/posts/red-colourspaces-derivation
  """
  
  from __future__ import division, unicode_literals
  
  import numpy as np
  
  from colour.colorimetry import CCS_ILLUMINANTS
  from colour.models.rgb import (RGB_Colourspace, log_decoding_Protune,
                                 log_encoding_Protune, normalised_primary_matrix)
  
  __author__ = 'Colour Developers'
  __copyright__ = 'Copyright (C) 2013-2020 - Colour Developers'
  __license__ = 'New BSD License - https://opensource.org/licenses/BSD-3-Clause'
  __maintainer__ = 'Colour Developers'
  __email__ = 'colour-developers@colour-science.org'
  __status__ = 'Production'
  
  __all__ = [
      'PRIMARIES_PROTUNE_NATIVE', 'WHITEPOINT_NAME_PROTUNE_NATIVE',
      'CCS_WHITEPOINT_PROTUNE_NATIVE', 'MATRIX_PROTUNE_NATIVE_TO_XYZ',
      'MATRIX_XYZ_TO_PROTUNE_NATIVE', 'RGB_COLOURSPACE_PROTUNE_NATIVE'
  ]
  
  PRIMARIES_PROTUNE_NATIVE = np.array([
      [0.698480461493841, 0.193026445370121],
      [0.329555378387345, 1.024596624134644],
      [0.108442631407675, -0.034678569754016],
  ])
  """
  *Protune Native* colourspace primaries.
  
  PRIMARIES_PROTUNE_NATIVE : ndarray, (3, 2)
  """
  
  WHITEPOINT_NAME_PROTUNE_NATIVE = 'D65'
  """
  *Protune Native* colourspace whitepoint name.
  
  WHITEPOINT_NAME_PROTUNE_NATIVE : unicode
  """
  
  CCS_WHITEPOINT_PROTUNE_NATIVE = (CCS_ILLUMINANTS[
      'CIE 1931 2 Degree Standard Observer'][WHITEPOINT_NAME_PROTUNE_NATIVE])
  """
  *Protune Native* colourspace whitepoint chromaticity coordinates.
  
  CCS_WHITEPOINT_PROTUNE_NATIVE : ndarray
  """
  
  MATRIX_PROTUNE_NATIVE_TO_XYZ = normalised_primary_matrix(
      PRIMARIES_PROTUNE_NATIVE, CCS_WHITEPOINT_PROTUNE_NATIVE)
  """
  *Protune Native* colourspace to *CIE XYZ* tristimulus values matrix.
  
  MATRIX_PROTUNE_NATIVE_TO_XYZ : array_like, (3, 3)
  """
  
  MATRIX_XYZ_TO_PROTUNE_NATIVE = np.linalg.inv(MATRIX_PROTUNE_NATIVE_TO_XYZ)
  """
  *CIE XYZ* tristimulus values to *Protune Native* colourspace matrix.
  
  MATRIX_XYZ_TO_PROTUNE_NATIVE : array_like, (3, 3)
  """
  
  RGB_COLOURSPACE_PROTUNE_NATIVE = RGB_Colourspace(
      'Protune Native',
      PRIMARIES_PROTUNE_NATIVE,
      CCS_WHITEPOINT_PROTUNE_NATIVE,
      WHITEPOINT_NAME_PROTUNE_NATIVE,
      MATRIX_PROTUNE_NATIVE_TO_XYZ,
      MATRIX_XYZ_TO_PROTUNE_NATIVE,
      log_encoding_Protune,
      log_decoding_Protune,
  )
  RGB_COLOURSPACE_PROTUNE_NATIVE.__doc__ = """
  *Protune Native* colourspace.
  
  References
  ----------
  :cite:`GoPro2016a`, :cite:`Mansencal2015d`
  
  RGB_COLOURSPACE_PROTUNE_NATIVE : RGB_Colourspace
  """
  