--- /dev/null
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Implements support for *Canon* colorspaces conversions and transfer functions.
+"""
+
+import array
+
+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,
+ name,
+ lut_directory,
+ lut_resolution_1d):
+ """
+ Object description.
+
+ Canon-Log to ACES.
+
+ Parameters
+ ----------
+ parameter : type
+ Parameter description.
+
+ Returns
+ -------
+ type
+ Return value description.
+ """
+
+ name = "%s - %s" % (transfer_function, gamut)
+ if transfer_function == "":
+ name = "Linear - %s" % gamut
+ if gamut == "":
+ name = "%s" % transfer_function
+
+ cs = ColorSpace(name)
+ cs.description = name
+ cs.equality_group = ''
+ cs.family = 'Canon'
+ cs.is_data = False
+
+ def legal_to_full(codeValue):
+ return (codeValue - 64.0) / (940.0 - 64.0)
+
+ def c_log_to_linear(codeValue):
+ # 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(10.0, (legal_to_full(codeValue) - c3) / c1) - 1.0) / c2
+ linear *= 0.9
+ # print(codeValue, linear)
+ 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(1023.0 * c / (lut_resolution_1d - 1))
+
+ lut = "%s_to_linear.spi1d" % transfer_function
+ genlut.write_SPI_1d(lut_directory + "/" + lut,
+ 0.0,
+ 1.0,
+ 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,
+ 0.092739623, 0.924121198, -0.016860821, 0.0,
+ 0.084812961, 0.006373835, 0.908813204, 0.0,
+ 0, 0, 0, 1.0],
+ 'direction': 'forward'})
+ elif gamut == 'Rec. 709 Tungsten':
+ cs.to_reference_transforms.append({
+ 'type': 'matrix',
+ 'matrix': [0.566996399, 0.365079418, 0.067924183, 0.0,
+ 0.070901044, 0.880331008, 0.048767948, 0.0,
+ 0.073013542, -0.066540862, 0.99352732, 0.0,
+ 0, 0, 0, 1.0],
+ 'direction': 'forward'})
+ elif gamut == 'DCI-P3 Daylight':
+ cs.to_reference_transforms.append({
+ 'type': 'matrix',
+ 'matrix': [0.607160575, 0.299507286, 0.093332140, 0.0,
+ 0.004968120, 1.050982224, -0.055950343, 0.0,
+ -0.007839939, 0.000809127, 1.007030813, 0.0,
+ 0, 0, 0, 1.0],
+ 'direction': 'forward'})
+ elif gamut == 'DCI-P3 Tungsten':
+ cs.to_reference_transforms.append({
+ 'type': 'matrix',
+ 'matrix': [0.650279125, 0.253880169, 0.095840706, 0.0,
+ -0.026137986, 1.017900530, 0.008237456, 0.0,
+ 0.007757558, -0.063081669, 1.055324110, 0.0,
+ 0, 0, 0, 1.0],
+ 'direction': 'forward'})
+ elif gamut == 'Cinema Gamut Daylight':
+ cs.to_reference_transforms.append({
+ 'type': 'matrix',
+ 'matrix': [0.763064455, 0.149021161, 0.087914384, 0.0,
+ 0.003657457, 1.10696038, -0.110617837, 0.0,
+ -0.009407794, -0.218383305, 1.227791099, 0.0,
+ 0, 0, 0, 1.0],
+ 'direction': 'forward'})
+ elif gamut == 'Cinema Gamut Tungsten':
+ cs.to_reference_transforms.append({
+ 'type': 'matrix',
+ 'matrix': [0.817416293, 0.090755698, 0.091828009, 0.0,
+ -0.035361374, 1.065690585, -0.030329211, 0.0,
+ 0.010390366, -0.299271107, 1.288880741, 0.0,
+ 0, 0, 0, 1.0],
+ 'direction': 'forward'})
+
+ cs.from_reference_transforms = []
+ return cs
+
+
+def create_colorspaces(lut_directory, lut_resolution_1d):
+ """
+ Generates the colorspace conversions.
+
+ Parameters
+ ----------
+ parameter : type
+ Parameter description.
+
+ Returns
+ -------
+ type
+ Return value description.
+ """
+
+ colorspaces = []
+
+ # Full conversion
+ c_log_1 = create_c_log(
+ "Rec. 709 Daylight",
+ "Canon-Log",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_1)
+
+ c_log_2 = create_c_log(
+ "Rec. 709 Tungsten",
+ "Canon-Log",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_2)
+
+ c_log_3 = create_c_log(
+ "DCI-P3 Daylight",
+ "Canon-Log",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_3)
+
+ c_log_4 = create_c_log(
+ "DCI-P3 Tungsten",
+ "Canon-Log",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_4)
+
+ c_log_5 = create_c_log(
+ "Cinema Gamut Daylight",
+ "Canon-Log",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_5)
+
+ c_log_6 = create_c_log(
+ "Cinema Gamut Tungsten",
+ "Canon-Log",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_6)
+
+ # Linearization only
+ c_log_7 = create_c_log(
+ '',
+ "Canon-Log",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_7)
+
+ # Primaries only
+ c_log_8 = create_c_log(
+ "Rec. 709 Daylight",
+ "",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_8)
+
+ c_log_9 = create_c_log(
+ "Rec. 709 Tungsten",
+ "",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_9)
+
+ c_log_10 = create_c_log(
+ "DCI-P3 Daylight",
+ "",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_10)
+
+ c_log_11 = create_c_log(
+ "DCI-P3 Tungsten",
+ "",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_11)
+
+ c_log_12 = create_c_log(
+ "Cinema Gamut Daylight",
+ "",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_12)
+
+ c_log_13 = create_c_log(
+ "Cinema Gamut Tungsten",
+ "",
+ "Canon-Log",
+ lut_directory,
+ lut_resolution_1d)
+ colorspaces.append(c_log_13)
+
+ return colorspaces
projects / OpenColorIO-Configs.git / blobdiff