+++ /dev/null
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-"""
-Implements support for *Canon* 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
-
-__author__ = 'ACES Developers'
-__copyright__ = 'Copyright (C) 2014 - 2015 - ACES Developers'
-__license__ = ''
-__maintainer__ = 'ACES Developers'
-__email__ = 'aces@oscars.org'
-__status__ = 'Production'
-
-__all__ = ['create_c_log',
- 'create_colorspaces']
-
-
-def create_c_log(gamut,
- transfer_function,
- lut_directory,
- lut_resolution_1d,
- aliases):
- """
- Creates colorspace covering the conversion from CLog 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.
- """
-
- name = '%s - %s' % (transfer_function, gamut)
- if transfer_function == '':
- name = 'Linear - Canon %s' % gamut
- if gamut == '':
- name = 'Curve - %s' % transfer_function
-
- cs = ColorSpace(name)
- cs.description = name
- cs.aliases = aliases
- cs.equality_group = ''
- cs.family = 'Input/Canon'
- 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 legal_to_full(code_value):
- return (code_value - 64) / (940 - 64)
-
- def c_log_to_linear(code_value):
- # log = fullToLegal(c1 * log10(c2*linear + 1) + c3)
- # linear = (pow(10, (legalToFul(log) - c3)/c1) - 1)/c2
- c1 = 0.529136
- c2 = 10.1596
- c3 = 0.0730597
-
- linear = (pow(10, (legal_to_full(code_value) - c3) / c1) - 1) / c2
- linear *= 0.9
-
- return linear
-
- cs.to_reference_transforms = []
-
- if transfer_function == 'Canon-Log':
- data = array.array('f', '\0' * lut_resolution_1d * 4)
- for c in range(lut_resolution_1d):
- data[c] = c_log_to_linear(1023 * c / (lut_resolution_1d - 1))
-
- lut = '%s_to_linear.spi1d' % transfer_function
- 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 == 'Rec. 709 Daylight':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': [0.561538969, 0.402060105, 0.036400926, 0,
- 0.092739623, 0.924121198, -0.016860821, 0,
- 0.084812961, 0.006373835, 0.908813204, 0,
- 0, 0, 0, 1],
- 'direction': 'forward'})
- elif gamut == 'Rec. 709 Tungsten':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': [0.566996399, 0.365079418, 0.067924183, 0,
- 0.070901044, 0.880331008, 0.048767948, 0,
- 0.073013542, -0.066540862, 0.99352732, 0,
- 0, 0, 0, 1],
- 'direction': 'forward'})
- elif gamut == 'DCI-P3 Daylight':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': [0.607160575, 0.299507286, 0.093332140, 0,
- 0.004968120, 1.050982224, -0.055950343, 0,
- -0.007839939, 0.000809127, 1.007030813, 0,
- 0, 0, 0, 1],
- 'direction': 'forward'})
- elif gamut == 'DCI-P3 Tungsten':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': [0.650279125, 0.253880169, 0.095840706, 0,
- -0.026137986, 1.017900530, 0.008237456, 0,
- 0.007757558, -0.063081669, 1.055324110, 0,
- 0, 0, 0, 1],
- 'direction': 'forward'})
- elif gamut == 'Cinema Gamut Daylight':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': [0.763064455, 0.149021161, 0.087914384, 0,
- 0.003657457, 1.10696038, -0.110617837, 0,
- -0.009407794, -0.218383305, 1.227791099, 0,
- 0, 0, 0, 1],
- 'direction': 'forward'})
- elif gamut == 'Cinema Gamut Tungsten':
- cs.to_reference_transforms.append({
- 'type': 'matrix',
- 'matrix': [0.817416293, 0.090755698, 0.091828009, 0,
- -0.035361374, 1.065690585, -0.030329211, 0,
- 0.010390366, -0.299271107, 1.288880741, 0,
- 0, 0, 0, 1],
- '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 Canon cameras and encodings
- """
-
- colorspaces = []
-
- # Full conversion
- c_log_1 = create_c_log(
- 'Rec. 709 Daylight',
- 'Canon-Log',
- lut_directory,
- lut_resolution_1d,
- ['canonlog_rec709day'])
- colorspaces.append(c_log_1)
-
- c_log_2 = create_c_log(
- 'Rec. 709 Tungsten',
- 'Canon-Log',
- lut_directory,
- lut_resolution_1d,
- ['canonlog_rec709tung'])
- colorspaces.append(c_log_2)
-
- c_log_3 = create_c_log(
- 'DCI-P3 Daylight',
- 'Canon-Log',
- lut_directory,
- lut_resolution_1d,
- ['canonlog_dcip3day'])
- colorspaces.append(c_log_3)
-
- c_log_4 = create_c_log(
- 'DCI-P3 Tungsten',
- 'Canon-Log',
- lut_directory,
- lut_resolution_1d,
- ['canonlog_dcip3tung'])
- colorspaces.append(c_log_4)
-
- c_log_5 = create_c_log(
- 'Cinema Gamut Daylight',
- 'Canon-Log',
- lut_directory,
- lut_resolution_1d,
- ['canonlog_cgamutday'])
- colorspaces.append(c_log_5)
-
- c_log_6 = create_c_log(
- 'Cinema Gamut Tungsten',
- 'Canon-Log',
- lut_directory,
- lut_resolution_1d,
- ['canonlog_cgamuttung'])
- colorspaces.append(c_log_6)
-
- # Linearization Only
- c_log_7 = create_c_log(
- '',
- 'Canon-Log',
- lut_directory,
- lut_resolution_1d,
- ['crv_canonlog'])
- colorspaces.append(c_log_7)
-
- # Primaries Only
- c_log_8 = create_c_log(
- 'Rec. 709 Daylight',
- '',
- lut_directory,
- lut_resolution_1d,
- ['lin_canonrec709day'])
- colorspaces.append(c_log_8)
-
- c_log_9 = create_c_log(
- 'Rec. 709 Tungsten',
- '',
- lut_directory,
- lut_resolution_1d,
- ['lin_canonrec709tung'])
- colorspaces.append(c_log_9)
-
- c_log_10 = create_c_log(
- 'DCI-P3 Daylight',
- '',
- lut_directory,
- lut_resolution_1d,
- ['lin_canondcip3day'])
- colorspaces.append(c_log_10)
-
- c_log_11 = create_c_log(
- 'DCI-P3 Tungsten',
- '',
- lut_directory,
- lut_resolution_1d,
- ['lin_canondcip3tung'])
- colorspaces.append(c_log_11)
-
- c_log_12 = create_c_log(
- 'Cinema Gamut Daylight',
- '',
- lut_directory,
- lut_resolution_1d,
- ['lin_canoncgamutday'])
- colorspaces.append(c_log_12)
-
- c_log_13 = create_c_log(
- 'Cinema Gamut Tungsten',
- '',
- lut_directory,
- lut_resolution_1d,
- ['lin_canoncgamuttung'])
- colorspaces.append(c_log_13)
-
- return colorspaces
projects / OpenColorIO-Configs.git / blobdiff