def test_write_LUT(self):
"""Test :func:`colour.io.luts.__init__.write_LUT` definition."""
LUT_1_r = read_LUT(
os.path.join(LUTS_DIRECTORY, "sony_spi1d", "eotf_sRGB_1D.spi1d"))
write_LUT(
LUT_1_r,
os.path.join(self._temporary_directory, "eotf_sRGB_1D.spi1d"),
)
LUT_1_t = read_LUT(
os.path.join(self._temporary_directory, "eotf_sRGB_1D.spi1d"))
self.assertEqual(LUT_1_r, LUT_1_t)
write_LUT(
LUTSequence(LUT_1_r),
os.path.join(self._temporary_directory, "eotf_sRGB_1D.spi1d"),
)
self.assertEqual(LUT_1_r, LUT_1_t)
LUT_2_r = read_LUT(
os.path.join(
LUTS_DIRECTORY,
"resolve_cube",
"Three_Dimensional_Table_With_Shaper.cube",
))
write_LUT(
LUT_2_r,
os.path.join(
self._temporary_directory,
"Three_Dimensional_Table_With_Shaper.cube",
),
)
LUT_2_t = read_LUT(
os.path.join(
self._temporary_directory,
"Three_Dimensional_Table_With_Shaper.cube",
))
self.assertEqual(LUT_2_r, LUT_2_t)
def make_transforms(transform_path, config):
sRGB_domain = numpy.array([0.0, 1.0])
sRGB_tf_to_linear_LUT = colour.LUT1D(
table=models.sRGB_COLOURSPACE.cctf_decoding(
colour.LUT1D.linear_table(1024, sRGB_domain)),
name="sRGB to Linear",
domain=sRGB_domain,
comments=["sRGB CCTF to Display Linear"])
sRGB_linear_to_tf_LUT = colour.LUT1D(
table=models.sRGB_COLOURSPACE.cctf_encoding(
colour.LUT1D.linear_table(8192, sRGB_domain)),
name="Linear to sRGB",
domain=sRGB_domain,
comments=["sRGB Display Linear to CCTF"])
path = os.path.join(transform_path, "sRGB_CCTF_to_Linear.spi1d")
create_directory(path)
io.write_LUT(LUT=sRGB_tf_to_linear_LUT, path=path, decimals=10)
path = os.path.join(transform_path, "sRGB_Linear_to_CCTF.spi1d")
create_directory(path)
io.write_LUT(LUT=sRGB_linear_to_tf_LUT, path=path, decimals=10)
# Off-domain 1D variant
sRGB_domain_variant = numpy.array([-0.125, 4.875])
sRGB_tf_to_linear_LUT_variant = colour.LUT1D(
table=models.sRGB_COLOURSPACE.cctf_decoding(
colour.LUT1D.linear_table(1024, sRGB_domain_variant)),
name="sRGB to Linear Variant",
domain=sRGB_domain_variant,
comments=["sRGB CCTF to Display Linear"])
sRGB_linear_to_tf_LUT_variant = colour.LUT1D(
table=models.sRGB_COLOURSPACE.cctf_encoding(
colour.LUT1D.linear_table(8192, sRGB_domain_variant)),
name="Linear to sRGB Variant",
domain=sRGB_domain_variant,
comments=["sRGB Display Linear to CCTF"])
path = os.path.join(transform_path, "sRGB_CCTF_to_Linear_variant.spi1d")
create_directory(path)
io.write_LUT(LUT=sRGB_tf_to_linear_LUT_variant, path=path, decimals=10)
path = os.path.join(transform_path, "sRGB_Linear_to_CCTF_variant.spi1d")
create_directory(path)
io.write_LUT(LUT=sRGB_linear_to_tf_LUT_variant, path=path, decimals=10)
# Define the sRGB specification
colourspace = PyOpenColorIO.ColorSpace(family="Colourspace",
name="sRGB Colourspace")
colourspace.setDescription("sRGB IEC 61966-2-1 Colourspace")
colourspace.setBitDepth(PyOpenColorIO.Constants.BIT_DEPTH_F32)
colourspace.setAllocationVars([0.0, 1.0])
colourspace.setAllocation(PyOpenColorIO.Constants.ALLOCATION_UNIFORM)
transform_to = PyOpenColorIO.FileTransform(
"sRGB_CCTF_to_Linear.spi1d",
interpolation=PyOpenColorIO.Constants.INTERP_NEAREST)
transform_from = PyOpenColorIO.FileTransform(
"sRGB_Linear_to_CCTF.spi1d",
interpolation=PyOpenColorIO.Constants.INTERP_NEAREST)
colourspace.setTransform(
transform_to, PyOpenColorIO.Constants.COLORSPACE_DIR_TO_REFERENCE)
colourspace.setTransform(
transform_from, PyOpenColorIO.Constants.COLORSPACE_DIR_FROM_REFERENCE)
config.addColorSpace(colourspace)
# Define the sRGB specification for the variation
colourspace = PyOpenColorIO.ColorSpace(family="Colourspace",
name="sRGB Colourspace Variant")
colourspace.setDescription("sRGB IEC 61966-2-1 Colourspace variant")
colourspace.setBitDepth(PyOpenColorIO.Constants.BIT_DEPTH_F32)
colourspace.setAllocationVars([-0.125, 1.125])
colourspace.setAllocation(PyOpenColorIO.Constants.ALLOCATION_UNIFORM)
transform_to = PyOpenColorIO.FileTransform(
"sRGB_CCTF_to_Linear_variant.spi1d",
interpolation=PyOpenColorIO.Constants.INTERP_NEAREST)
transform_from = PyOpenColorIO.FileTransform(
"sRGB_Linear_to_CCTF_variant.spi1d",
interpolation=PyOpenColorIO.Constants.INTERP_NEAREST)
colourspace.setTransform(
transform_to, PyOpenColorIO.Constants.COLORSPACE_DIR_TO_REFERENCE)
colourspace.setTransform(
transform_from, PyOpenColorIO.Constants.COLORSPACE_DIR_FROM_REFERENCE)
config.addColorSpace(colourspace)
# Define the commodity sRGB transform
colourspace = PyOpenColorIO.ColorSpace(family="Colourspace",
name="BT.709 2.2 CCTF Colourspace")
colourspace.setDescription("Commodity Display BT.709 2.2 CCTF Colourspace")
colourspace.setBitDepth(PyOpenColorIO.Constants.BIT_DEPTH_F32)
colourspace.setAllocationVars([0.0, 1.0])
colourspace.setAllocation(PyOpenColorIO.Constants.ALLOCATION_UNIFORM)
transform_to = PyOpenColorIO.ExponentTransform([2.2, 2.2, 2.2, 1.0])
transform_from = PyOpenColorIO.ExponentTransform([2.2, 2.2, 2.2, 1.0])
transform_from.setDirection(PyOpenColorIO.Constants.TRANSFORM_DIR_INVERSE)
colourspace.setTransform(
transform_to, PyOpenColorIO.Constants.COLORSPACE_DIR_TO_REFERENCE)
colourspace.setTransform(
transform_from, PyOpenColorIO.Constants.COLORSPACE_DIR_FROM_REFERENCE)
config.addColorSpace(colourspace)
def make_transforms(transform_path, config):
# The canonized sRGB transform
# Due to the nature of the GPU issues in OpenColorIO v1.1.1, this
# 1D LUT oversamples the sRGB transfer function range to have
# correct results via the GPU.
#
# It also adds a faster inverse transform instead of a lookup for
# output processing speed. It must be larger as a result, due to
# quantisation issues in the linear domain.
sRGB_domain = numpy.array([-0.125, 3.0])
sRGB_tf_to_linear_LUT = colour.LUT1D(
table=models.sRGB_COLOURSPACE.cctf_decoding(
colour.LUT1D.linear_table(1024, sRGB_domain)),
name="sRGB to Linear",
domain=sRGB_domain,
comments=["sRGB CCTF to Display Linear"])
sRGB_linear_to_tf_LUT_variant = colour.LUT1D(
table=models.sRGB_COLOURSPACE.cctf_encoding(
colour.LUT1D.linear_table(8192, sRGB_domain)),
name="Linear to sRGB",
domain=sRGB_domain,
comments=["sRGB Display Linear to CCTF"])
path = os.path.join(transform_path, "sRGB_CCTF_to_Linear.spi1d")
create_directory(path)
io.write_LUT(LUT=sRGB_tf_to_linear_LUT, path=path, decimals=10)
path = os.path.join(transform_path, "sRGB_Linear_to_CCTF.spi1d")
create_directory(path)
io.write_LUT(LUT=sRGB_linear_to_tf_LUT_variant, path=path, decimals=10)
# Define the sRGB specification
colourspace = PyOpenColorIO.ColorSpace(family="Colourspace",
name="sRGB Colourspace")
colourspace.setDescription("sRGB IEC 61966-2-1 Colourspace")
colourspace.setBitDepth(PyOpenColorIO.Constants.BIT_DEPTH_F32)
colourspace.setAllocationVars([0.0, 1.0])
colourspace.setAllocation(PyOpenColorIO.Constants.ALLOCATION_UNIFORM)
transform_to = PyOpenColorIO.FileTransform(
"sRGB_CCTF_to_Linear.spi1d",
interpolation=PyOpenColorIO.Constants.INTERP_NEAREST)
transform_from = PyOpenColorIO.FileTransform(
"sRGB_Linear_to_CCTF.spi1d",
interpolation=PyOpenColorIO.Constants.INTERP_NEAREST)
colourspace.setTransform(
transform_to, PyOpenColorIO.Constants.COLORSPACE_DIR_TO_REFERENCE)
colourspace.setTransform(
transform_from, PyOpenColorIO.Constants.COLORSPACE_DIR_FROM_REFERENCE)
config.addColorSpace(colourspace)
# Define the commodity sRGB transform
colourspace = PyOpenColorIO.ColorSpace(family="Colourspace",
name="BT.709 2.2 CCTF Colourspace")
colourspace.setDescription("Commodity Display BT.709 2.2 CCTF Colourspace")
colourspace.setBitDepth(PyOpenColorIO.Constants.BIT_DEPTH_F32)
colourspace.setAllocationVars([0.0, 1.0])
colourspace.setAllocation(PyOpenColorIO.Constants.ALLOCATION_UNIFORM)
transform_to = PyOpenColorIO.ExponentTransform([2.2, 2.2, 2.2, 1.0])
transform_from = PyOpenColorIO.ExponentTransform([2.2, 2.2, 2.2, 1.0])
transform_from.setDirection(PyOpenColorIO.Constants.TRANSFORM_DIR_INVERSE)
colourspace.setTransform(
transform_to, PyOpenColorIO.Constants.COLORSPACE_DIR_TO_REFERENCE)
colourspace.setTransform(
transform_from, PyOpenColorIO.Constants.COLORSPACE_DIR_FROM_REFERENCE)
config.addColorSpace(colourspace)