ramp.close()
-def write_SPI_1d(filename,
- from_min,
- from_max,
- data,
- entries,
- channels,
+def write_SPI_1d(filename,
+ from_min,
+ from_max,
+ data,
+ entries,
+ channels,
components=3):
"""
Object description.
fp.write('}\n')
-def write_CSP_1d(filename,
- from_min,
- from_max,
- data,
- entries,
- channels,
+def write_CSP_1d(filename,
+ from_min,
+ from_max,
+ data,
+ entries,
+ channels,
components=3):
"""
Object description.
fp.write('CSPLUTV100\n')
fp.write('1D\n')
fp.write('\n')
- fp.write('BEGIN METADATA')
- fp.write('END METADATA')
+ fp.write('BEGIN METADATA\n')
+ fp.write('END METADATA\n')
fp.write('\n')
fp.write('%d\n' % entries)
if components == 1:
- for i in range(0, entries):
- entry = ''
- for j in range(3):
- entry = '%s %s' % (entry, data[i * channels])
- fp.write('%s\n' % entry)
+ for i in range(0, entries):
+ entry = ''
+ for j in range(3):
+ entry = '%s %s' % (entry, data[i * channels])
+ fp.write('%s\n' % entry)
else:
- for i in range(entries):
- entry = ''
- for j in range(components):
- entry = '%s %s' % (entry, data[i * channels + j])
- fp.write('%s\n' % entry)
+ for i in range(entries):
+ entry = ''
+ for j in range(components):
+ entry = '%s %s' % (entry, data[i * channels + j])
+ fp.write('%s\n' % entry)
fp.write('\n')
-def write_1d(filename,
- from_min,
- from_max,
- data,
- data_entries,
- data_channels,
+
+def write_CTL_1d(filename,
+ from_min,
+ from_max,
+ data,
+ entries,
+ channels,
+ components=3):
+ """
+ Object description.
+
+ Parameters
+ ----------
+ parameter : type
+ Parameter description.
+
+ Returns
+ -------
+ type
+ Return value description.
+ """
+
+ # May want to use fewer components than there are channels in the data
+ # Most commonly used for single channel LUTs
+ components = min(3, components, channels)
+
+ with open(filename, 'w') as fp:
+ fp.write('// %d x %d LUT generated by "generate_lut"\n' % (
+ entries, components))
+ fp.write('\n')
+ fp.write('const float min1d = %3.9f;\n' % from_min)
+ fp.write('const float max1d = %3.9f;\n' % from_max)
+ fp.write('\n')
+
+ # Write LUT
+ if components == 1:
+ fp.write('const float lut[] = {\n')
+ for i in range(0, entries):
+ fp.write('%s' % data[i * channels])
+ if i != (entries - 1):
+ fp.write(',')
+ fp.write('\n')
+ fp.write('};\n')
+ fp.write('\n')
+ else:
+ for j in range(components):
+ fp.write('const float lut%d[] = {\n' % j)
+ for i in range(0, entries):
+ fp.write('%s' % data[i * channels])
+ if i != (entries - 1):
+ fp.write(',')
+ fp.write('\n')
+ fp.write('};\n')
+ fp.write('\n')
+
+ fp.write('void main\n')
+ fp.write('(\n')
+ fp.write(' input varying float rIn,\n')
+ fp.write(' input varying float gIn,\n')
+ fp.write(' input varying float bIn,\n')
+ fp.write(' input varying float aIn,\n')
+ fp.write(' output varying float rOut,\n')
+ fp.write(' output varying float gOut,\n')
+ fp.write(' output varying float bOut,\n')
+ fp.write(' output varying float aOut\n')
+ fp.write(')\n')
+ fp.write('{\n')
+ fp.write(' float r = rIn;\n')
+ fp.write(' float g = gIn;\n')
+ fp.write(' float b = bIn;\n')
+ fp.write('\n')
+ fp.write(' // Apply LUT\n')
+ if components == 1:
+ fp.write(' r = lookup1D(lut, min1d, max1d, r);\n')
+ fp.write(' g = lookup1D(lut, min1d, max1d, g);\n')
+ fp.write(' b = lookup1D(lut, min1d, max1d, b);\n')
+ elif components == 3:
+ fp.write(' r = lookup1D(lut0, min1d, max1d, r);\n')
+ fp.write(' g = lookup1D(lut1, min1d, max1d, g);\n')
+ fp.write(' b = lookup1D(lut2, min1d, max1d, b);\n')
+ fp.write('\n')
+ fp.write(' rOut = r;\n')
+ fp.write(' gOut = g;\n')
+ fp.write(' bOut = b;\n')
+ fp.write(' aOut = aIn;\n')
+ fp.write('}\n')
+
+
+def write_1d(filename,
+ from_min,
+ from_max,
+ data,
+ data_entries,
+ data_channels,
lut_components=3,
format='spi1d'):
"""
Return value description.
"""
- ocioFormatsToExtensions = {'cinespace' : 'csp',
- 'flame' : '3dl',
- 'icc' : 'icc',
- 'houdini' : 'lut',
- 'lustre' : '3dl'}
+ ocioFormatsToExtensions = {'cinespace': 'csp',
+ 'flame': '3dl',
+ 'icc': 'icc',
+ 'houdini': 'lut',
+ 'lustre': '3dl',
+ 'ctl': 'ctl'}
if format in ocioFormatsToExtensions:
- if ocioFormatsToExtensions[format] == 'csp':
- write_CSP_1d(filename,
+ if ocioFormatsToExtensions[format] == 'csp':
+ write_CSP_1d(filename,
+ from_min,
+ from_max,
+ data,
+ data_entries,
+ data_channels,
+ lut_components)
+ elif ocioFormatsToExtensions[format] == 'ctl':
+ write_CTL_1d(filename,
+ from_min,
+ from_max,
+ data,
+ data_entries,
+ data_channels,
+ lut_components)
+ else:
+ write_SPI_1d(filename,
from_min,
from_max,
data,
data_entries,
data_channels,
lut_components)
- else:
- write_SPI_1d(filename,
- from_min,
- from_max,
- data,
- data_entries,
- data_channels,
- lut_components)
+
def generate_1d_LUT_from_image(ramp_1d_path,
output_path=None,
type = oiio.FLOAT
ramp_data = ramp.read_image(type)
- write_1d(output_path, min_value, max_value,
- ramp_data, ramp_width, ramp_channels, channels, format)
+ write_1d(output_path, min_value, max_value,
+ ramp_data, ramp_width, ramp_channels, channels, format)
def generate_3d_LUT_image(ramp_3d_path, resolution=32):
lut_extract.execute()
-def generate_3d_LUT_from_image(ramp_3d_path,
- output_path=None,
+def generate_3d_LUT_from_image(ramp_3d_path,
+ output_path=None,
resolution=32,
format='spi3d'):
"""
if output_path is None:
output_path = '%s.%s' % (ramp_3d_path, 'spi3d')
- ocioFormatsToExtensions = {'cinespace' : 'csp',
- 'flame' : '3dl',
- 'icc' : 'icc',
- 'houdini' : 'lut',
- 'lustre' : '3dl'}
+ ocioFormatsToExtensions = {'cinespace': 'csp',
+ 'flame': '3dl',
+ 'icc': 'icc',
+ 'houdini': 'lut',
+ 'lustre': '3dl'}
if format == 'spi3d' or not (format in ocioFormatsToExtensions):
- # Extract a spi3d LUT
- args = ['--extract',
- '--cubesize',
- str(resolution),
- '--maxwidth',
- str(resolution * resolution),
- '--input',
- ramp_3d_path,
- '--output',
- output_path]
- lut_extract = Process(description='extract a 3d LUT',
- cmd='ociolutimage',
- args=args)
- lut_extract.execute()
+ # Extract a spi3d LUT
+ args = ['--extract',
+ '--cubesize',
+ str(resolution),
+ '--maxwidth',
+ str(resolution * resolution),
+ '--input',
+ ramp_3d_path,
+ '--output',
+ output_path]
+ lut_extract = Process(description='extract a 3d LUT',
+ cmd='ociolutimage',
+ args=args)
+ lut_extract.execute()
else:
- output_path_spi3d = '%s.%s' % (output_path, 'spi3d')
-
- # Extract a spi3d LUT
- args = ['--extract',
- '--cubesize',
- str(resolution),
- '--maxwidth',
- str(resolution * resolution),
- '--input',
- ramp_3d_path,
- '--output',
- output_path_spi3d]
- lut_extract = Process(description='extract a 3d LUT',
- cmd='ociolutimage',
- args=args)
- lut_extract.execute()
-
- # Convert to a different format
- args = ['--lut',
- output_path_spi3d,
- '--format',
- format,
- output_path]
- lut_convert = Process(description='convert a 3d LUT',
- cmd='ociobakelut',
- args=args)
- lut_convert.execute()
+ output_path_spi3d = '%s.%s' % (output_path, 'spi3d')
+
+ # Extract a spi3d LUT
+ args = ['--extract',
+ '--cubesize',
+ str(resolution),
+ '--maxwidth',
+ str(resolution * resolution),
+ '--input',
+ ramp_3d_path,
+ '--output',
+ output_path_spi3d]
+ lut_extract = Process(description='extract a 3d LUT',
+ cmd='ociolutimage',
+ args=args)
+ lut_extract.execute()
+
+ # Convert to a different format
+ args = ['--lut',
+ output_path_spi3d,
+ '--format',
+ format,
+ output_path]
+ lut_convert = Process(description='convert a 3d LUT',
+ cmd='ociobakelut',
+ args=args)
+ lut_convert.execute()
def apply_CTL_to_image(input_image,
corrected_LUT_image,
lut_resolution)
- generate_3d_LUT_from_image(corrected_LUT_image,
- lut_path,
- lut_resolution,
+ generate_3d_LUT_from_image(corrected_LUT_image,
+ lut_path,
+ lut_resolution,
format)
if cleanup:
lut_path_spi3d = '%s.%s' % (lut_path, 'spi3d')
os.remove(lut_path_spi3d)
+
def main():
"""
Object description.