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
cs.family = '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 = 95.0
- white_point = 685.0
+ black_point = 95
+ white_point = 685
code_value_to_density = 0.002
- black_linear = pow(10.0, (black_point - white_point) * (
+ black_linear = pow(10, (black_point - white_point) * (
code_value_to_density / n_gamma))
- code_linear = pow(10.0, (code_value - white_point) * (
+ code_linear = pow(10, (code_value - white_point) * (
code_value_to_density / n_gamma))
- return (code_linear - black_linear) / (1.0 - black_linear)
+ 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(1023.0 * c / (lut_resolution_1d - 1))
+ 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),
- 0.0,
- 1.0,
+ 0,
+ 1,
data,
lut_resolution_1d,
1)
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',
["rlf_dgn2"])
colorspaces.append(RED_log_film_dragon2)
+ RED_log_film_color = create_RED_log_film(
+ 'REDcolor',
+ 'REDlogFilm',
+ 'REDlogFilm',
+ lut_directory,
+ lut_resolution_1d,
+ ["rlf_rc"])
+ colorspaces.append(RED_log_film_color)
+
RED_log_film_color2 = create_RED_log_film(
'REDcolor2',
'REDlogFilm',
["lin_dgn2"])
colorspaces.append(RED_dragon2)
+ RED_color = create_RED_log_film(
+ 'REDcolor',
+ '',
+ 'REDlogFilm',
+ lut_directory,
+ lut_resolution_1d,
+ ["lin_rc"])
+ colorspaces.append(RED_color)
+
RED_color2 = create_RED_log_film(
'REDcolor2',
'',