2 # -*- coding: utf-8 -*-
5 Implements support for *RED* colorspaces conversions and transfer functions.
10 import aces_ocio.generateLUT as genlut
11 from aces_ocio.util import ColorSpace, mat44FromMat33
13 __author__ = 'ACES Developers'
14 __copyright__ = 'Copyright (C) 2014 - 2015 - ACES Developers'
16 __maintainer__ = 'ACES Developers'
17 __email__ = 'aces@oscars.org'
18 __status__ = 'Production'
20 __all__ = ['createREDlogFilm',
24 def createREDlogFilm(gamut, transferFunction, name, lutDir, lutResolution1d):
28 RED colorspaces to ACES.
33 Parameter description.
38 Return value description.
41 name = "%s - %s" % (transferFunction, gamut)
42 if transferFunction == "":
43 name = "Linear - %s" % gamut
45 name = "%s" % transferFunction
53 def cineonToLinear(codeValue):
57 codeValueToDensity = 0.002
59 blackLinear = pow(10.0, (blackPoint - whitePoint) * (
60 codeValueToDensity / nGamma))
61 codeLinear = pow(10.0, (codeValue - whitePoint) * (
62 codeValueToDensity / nGamma))
64 return (codeLinear - blackLinear) / (1.0 - blackLinear)
66 cs.toReferenceTransforms = []
68 if transferFunction == 'REDlogFilm':
69 data = array.array('f', "\0" * lutResolution1d * 4)
70 for c in range(lutResolution1d):
71 data[c] = cineonToLinear(1023.0 * c / (lutResolution1d - 1))
73 lut = "CineonLog_to_linear.spi1d"
74 genlut.writeSPI1D(lutDir + "/" + lut,
81 cs.toReferenceTransforms.append({
84 'interpolation': 'linear',
85 'direction': 'forward'
88 if gamut == 'DRAGONcolor':
89 cs.toReferenceTransforms.append({
91 'matrix': mat44FromMat33([0.532279, 0.376648, 0.091073,
92 0.046344, 0.974513, -0.020860,
93 -0.053976, -0.000320, 1.054267]),
94 'direction': 'forward'
96 elif gamut == 'DRAGONcolor2':
97 cs.toReferenceTransforms.append({
99 'matrix': mat44FromMat33([0.468452, 0.331484, 0.200064,
100 0.040787, 0.857658, 0.101553,
101 -0.047504, -0.000282, 1.047756]),
102 'direction': 'forward'
104 elif gamut == 'REDcolor2':
105 cs.toReferenceTransforms.append({
107 'matrix': mat44FromMat33([0.480997, 0.402289, 0.116714,
108 -0.004938, 1.000154, 0.004781,
109 -0.105257, 0.025320, 1.079907]),
110 'direction': 'forward'
112 elif gamut == 'REDcolor3':
113 cs.toReferenceTransforms.append({
115 'matrix': mat44FromMat33([0.512136, 0.360370, 0.127494,
116 0.070377, 0.903884, 0.025737,
117 -0.020824, 0.017671, 1.003123]),
118 'direction': 'forward'
120 elif gamut == 'REDcolor4':
121 cs.toReferenceTransforms.append({
123 'matrix': mat44FromMat33([0.474202, 0.333677, 0.192121,
124 0.065164, 0.836932, 0.097901,
125 -0.019281, 0.016362, 1.002889]),
126 'direction': 'forward'
129 cs.fromReferenceTransforms = []
133 def createColorSpaces(lutDir, lutResolution1d):
135 Generates the colorspace conversions.
140 Parameter description.
145 Return value description.
151 REDlogFilmDRAGON = createREDlogFilm(
152 "DRAGONcolor", "REDlogFilm", "REDlogFilm", lutDir, lutResolution1d)
153 colorspaces.append(REDlogFilmDRAGON)
155 REDlogFilmDRAGON2 = createREDlogFilm(
156 "DRAGONcolor2", "REDlogFilm", "REDlogFilm", lutDir, lutResolution1d)
157 colorspaces.append(REDlogFilmDRAGON2)
159 REDlogFilmREDcolor2 = createREDlogFilm(
160 "REDcolor2", "REDlogFilm", "REDlogFilm", lutDir, lutResolution1d)
161 colorspaces.append(REDlogFilmREDcolor2)
163 REDlogFilmREDcolor3 = createREDlogFilm(
164 "REDcolor3", "REDlogFilm", "REDlogFilm", lutDir, lutResolution1d)
165 colorspaces.append(REDlogFilmREDcolor3)
167 REDlogFilmREDcolor4 = createREDlogFilm(
168 "REDcolor4", "REDlogFilm", "REDlogFilm", lutDir, lutResolution1d)
169 colorspaces.append(REDlogFilmREDcolor4)
172 REDlogFilmDRAGON = createREDlogFilm(
173 "", "REDlogFilm", "REDlogFilm", lutDir, lutResolution1d)
174 colorspaces.append(REDlogFilmDRAGON)
177 REDlogFilmDRAGON = createREDlogFilm(
178 "DRAGONcolor", "", "REDlogFilm", lutDir, lutResolution1d)
179 colorspaces.append(REDlogFilmDRAGON)
181 REDlogFilmDRAGON2 = createREDlogFilm(
182 "DRAGONcolor2", "", "REDlogFilm", lutDir, lutResolution1d)
183 colorspaces.append(REDlogFilmDRAGON2)
185 REDlogFilmREDcolor2 = createREDlogFilm(
186 "REDcolor2", "", "REDlogFilm", lutDir, lutResolution1d)
187 colorspaces.append(REDlogFilmREDcolor2)
189 REDlogFilmREDcolor3 = createREDlogFilm(
190 "REDcolor3", "", "REDlogFilm", lutDir, lutResolution1d)
191 colorspaces.append(REDlogFilmREDcolor3)
193 REDlogFilmREDcolor4 = createREDlogFilm(
194 "REDcolor4", "", "REDlogFilm", lutDir, lutResolution1d)
195 colorspaces.append(REDlogFilmREDcolor4)