+++ /dev/null
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-"""
-Implements support for *RED* colorspaces conversions and transfer functions.
-"""
-
-from __future__ import division
-
-import array
-import os
-
-import PyOpenColorIO as ocio
-
-import aces_ocio.generate_lut as genlut
-from aces_ocio.utilities import ColorSpace, mat44_from_mat33
-
-__author__ = 'ACES Developers'
-__copyright__ = 'Copyright (C) 2014 - 2015 - ACES Developers'
-__license__ = ''
-__maintainer__ = 'ACES Developers'
-__email__ = 'aces@oscars.org'
-__status__ = 'Production'
-
-__all__ = ['create_red_log_film',
- 'create_colorspaces']
-
-
-def create_red_log_film(gamut,
- transfer_function,
- lut_directory,
- lut_resolution_1d,
- aliases=None):
- """
- Creates colorspace covering the conversion from RED spaces to ACES, with various
- transfer functions and encoding gamuts covered
-
- Parameters
- ----------
- gamut : str
- The name of the encoding gamut to use.
- transfer_function : str
- The name of the transfer function to use
- lut_directory : str or unicode
- The directory to use when generating LUTs
- lut_resolution_1d : int
- The resolution of generated 1D LUTs
- aliases : list of str
- Aliases for this colorspace
-
- Returns
- -------
- ColorSpace
- A ColorSpace container class referencing the LUTs, matrices and identifying
- information for the requested colorspace.
- """
-
- if aliases is None:
- aliases = []
-
- name = '%s - %s' % (transfer_function, gamut)
- if transfer_function == '':
- name = 'Linear - %s' % gamut
- if gamut == '':
- name = 'Curve - %s' % transfer_function
-
- cs = ColorSpace(name)
- cs.description = name
- cs.aliases = aliases
- cs.equality_group = ''
- cs.family = 'Input/RED'
- cs.is_data = False
-
- # A linear space needs allocation variables
- if transfer_function == '':
- cs.allocation_type = ocio.Constants.ALLOCATION_LG2
- cs.allocation_vars = [-8, 5, 0.00390625]
-
- def cineon_to_linear(code_value):
- n_gamma = 0.6
- black_point = 95
- white_point = 685
- code_value_to_density = 0.002
-
- black_linear = pow(10, (black_point - white_point) * (
- code_value_to_density / n_gamma))
- code_linear = pow(10, (code_value - white_point) * (
- code_value_to_density / n_gamma))
-
- return (code_linear - black_linear) / (1 - black_linear)
-
- cs.to_reference_transforms = []
-
- if transfer_function == 'REDlogFilm':
- data = array.array('f', '\0' * lut_resolution_1d * 4)
- for c in range(lut_resolution_1d):
- data[c] = cineon_to_linear(1023 * c / (lut_resolution_1d - 1))
-
- lut = 'CineonLog_to_linear.spi1d'
- genlut.write_SPI_1d(
- os.path.join(lut_directory, lut),
- 0,
- 1,
- data,
- lut_resolution_1d,
- 1)
-
- cs.to_reference_transforms.append({
- 'type': 'lutFile',
- 'path': lut,
- 'interpolation': 'linear',
- 'direction': 'forward'})
-
- if gamut == 'DRAGONcolor':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': mat44_from_mat33([0.532279, 0.376648, 0.091073,
- 0.046344, 0.974513, -0.020860,
- -0.053976, -0.000320, 1.054267]),
- 'direction': 'forward'})
- elif gamut == 'DRAGONcolor2':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': mat44_from_mat33([0.468452, 0.331484, 0.200064,
- 0.040787, 0.857658, 0.101553,
- -0.047504, -0.000282, 1.047756]),
- 'direction': 'forward'})
- elif gamut == 'REDcolor':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': mat44_from_mat33([0.451464, 0.388498, 0.160038,
- 0.062716, 0.866790, 0.070491,
- -0.017541, 0.086921, 0.930590]),
- 'direction': 'forward'})
- elif gamut == 'REDcolor2':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': mat44_from_mat33([0.480997, 0.402289, 0.116714,
- -0.004938, 1.000154, 0.004781,
- -0.105257, 0.025320, 1.079907]),
- 'direction': 'forward'})
- elif gamut == 'REDcolor3':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': mat44_from_mat33([0.512136, 0.360370, 0.127494,
- 0.070377, 0.903884, 0.025737,
- -0.020824, 0.017671, 1.003123]),
- 'direction': 'forward'})
- elif gamut == 'REDcolor4':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': mat44_from_mat33([0.474202, 0.333677, 0.192121,
- 0.065164, 0.836932, 0.097901,
- -0.019281, 0.016362, 1.002889]),
- 'direction': 'forward'})
-
- cs.from_reference_transforms = []
- return cs
-
-
-def create_colorspaces(lut_directory, lut_resolution_1d):
- """
- Generates the colorspace conversions.
-
- Parameters
- ----------
- lut_directory : str or unicode
- The directory to use when generating LUTs
- lut_resolution_1d : int
- The resolution of generated 1D LUTs
-
- Returns
- -------
- list
- A list of colorspaces for RED cameras and encodings
- """
-
- colorspaces = []
-
- # Full conversion
- red_log_film_dragon = create_red_log_film(
- 'DRAGONcolor',
- 'REDlogFilm',
- lut_directory,
- lut_resolution_1d,
- ['rlf_dgn'])
- colorspaces.append(red_log_film_dragon)
-
- red_log_film_dragon2 = create_red_log_film(
- 'DRAGONcolor2',
- 'REDlogFilm',
- lut_directory,
- lut_resolution_1d,
- ['rlf_dgn2'])
- colorspaces.append(red_log_film_dragon2)
-
- red_log_film_color = create_red_log_film(
- 'REDcolor',
- 'REDlogFilm',
- lut_directory,
- lut_resolution_1d,
- ['rlf_rc'])
- colorspaces.append(red_log_film_color)
-
- red_log_film_color2 = create_red_log_film(
- 'REDcolor2',
- 'REDlogFilm',
- lut_directory,
- lut_resolution_1d,
- ['rlf_rc2'])
- colorspaces.append(red_log_film_color2)
-
- red_log_film_color3 = create_red_log_film(
- 'REDcolor3',
- 'REDlogFilm',
- lut_directory,
- lut_resolution_1d,
- ['rlf_rc3'])
- colorspaces.append(red_log_film_color3)
-
- red_log_film_color4 = create_red_log_film(
- 'REDcolor4',
- 'REDlogFilm',
- lut_directory,
- lut_resolution_1d,
- ['rlf_rc4'])
- colorspaces.append(red_log_film_color4)
-
- # Linearization only
- red_log_film = create_red_log_film(
- '',
- 'REDlogFilm',
- lut_directory,
- lut_resolution_1d,
- ['crv_rlf'])
- colorspaces.append(red_log_film)
-
- # Primaries only
- red_dragon = create_red_log_film(
- 'DRAGONcolor',
- '',
- lut_directory,
- lut_resolution_1d,
- ['lin_dgn'])
- colorspaces.append(red_dragon)
-
- red_dragon2 = create_red_log_film(
- 'DRAGONcolor2',
- '',
- lut_directory,
- lut_resolution_1d,
- ['lin_dgn2'])
- colorspaces.append(red_dragon2)
-
- red_color = create_red_log_film(
- 'REDcolor',
- '',
- lut_directory,
- lut_resolution_1d,
- ['lin_rc'])
- colorspaces.append(red_color)
-
- red_color2 = create_red_log_film(
- 'REDcolor2',
- '',
- lut_directory,
- lut_resolution_1d,
- ['lin_rc2'])
- colorspaces.append(red_color2)
-
- red_color3 = create_red_log_film(
- 'REDcolor3',
- '',
- lut_directory,
- lut_resolution_1d,
- ['lin_rc3'])
- colorspaces.append(red_color3)
-
- red_color4 = create_red_log_film(
- 'REDcolor4',
- '',
- lut_directory,
- lut_resolution_1d,
- ['lin_rc4'])
- colorspaces.append(red_color4)
-
- return colorspaces
projects / OpenColorIO-Configs.git / blobdiff