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# The Python Imaging Library. | |
# $Id$ | |
# Optional color management support, based on Kevin Cazabon's PyCMS | |
# library. | |
# Originally released under LGPL. Graciously donated to PIL in | |
# March 2009, for distribution under the standard PIL license | |
# History: | |
# 2009-03-08 fl Added to PIL. | |
# Copyright (C) 2002-2003 Kevin Cazabon | |
# Copyright (c) 2009 by Fredrik Lundh | |
# Copyright (c) 2013 by Eric Soroos | |
# See the README file for information on usage and redistribution. See | |
# below for the original description. | |
from __future__ import annotations | |
import operator | |
import sys | |
from enum import IntEnum, IntFlag | |
from functools import reduce | |
from typing import Any, Literal, SupportsFloat, SupportsInt, Union | |
from . import Image, __version__ | |
from ._deprecate import deprecate | |
from ._typing import SupportsRead | |
try: | |
from . import _imagingcms as core | |
except ImportError as ex: | |
# Allow error import for doc purposes, but error out when accessing | |
# anything in core. | |
from ._util import DeferredError | |
core = DeferredError.new(ex) | |
_DESCRIPTION = """ | |
pyCMS | |
a Python / PIL interface to the littleCMS ICC Color Management System | |
Copyright (C) 2002-2003 Kevin Cazabon | |
kevin@cazabon.com | |
https://www.cazabon.com | |
pyCMS home page: https://www.cazabon.com/pyCMS | |
littleCMS home page: https://www.littlecms.com | |
(littleCMS is Copyright (C) 1998-2001 Marti Maria) | |
Originally released under LGPL. Graciously donated to PIL in | |
March 2009, for distribution under the standard PIL license | |
The pyCMS.py module provides a "clean" interface between Python/PIL and | |
pyCMSdll, taking care of some of the more complex handling of the direct | |
pyCMSdll functions, as well as error-checking and making sure that all | |
relevant data is kept together. | |
While it is possible to call pyCMSdll functions directly, it's not highly | |
recommended. | |
Version History: | |
1.0.0 pil Oct 2013 Port to LCMS 2. | |
0.1.0 pil mod March 10, 2009 | |
Renamed display profile to proof profile. The proof | |
profile is the profile of the device that is being | |
simulated, not the profile of the device which is | |
actually used to display/print the final simulation | |
(that'd be the output profile) - also see LCMSAPI.txt | |
input colorspace -> using 'renderingIntent' -> proof | |
colorspace -> using 'proofRenderingIntent' -> output | |
colorspace | |
Added LCMS FLAGS support. | |
Added FLAGS["SOFTPROOFING"] as default flag for | |
buildProofTransform (otherwise the proof profile/intent | |
would be ignored). | |
0.1.0 pil March 2009 - added to PIL, as PIL.ImageCms | |
0.0.2 alpha Jan 6, 2002 | |
Added try/except statements around type() checks of | |
potential CObjects... Python won't let you use type() | |
on them, and raises a TypeError (stupid, if you ask | |
me!) | |
Added buildProofTransformFromOpenProfiles() function. | |
Additional fixes in DLL, see DLL code for details. | |
0.0.1 alpha first public release, Dec. 26, 2002 | |
Known to-do list with current version (of Python interface, not pyCMSdll): | |
none | |
""" | |
_VERSION = "1.0.0 pil" | |
def __getattr__(name: str) -> Any: | |
if name == "DESCRIPTION": | |
deprecate("PIL.ImageCms.DESCRIPTION", 12) | |
return _DESCRIPTION | |
elif name == "VERSION": | |
deprecate("PIL.ImageCms.VERSION", 12) | |
return _VERSION | |
elif name == "FLAGS": | |
deprecate("PIL.ImageCms.FLAGS", 12, "PIL.ImageCms.Flags") | |
return _FLAGS | |
msg = f"module '{__name__}' has no attribute '{name}'" | |
raise AttributeError(msg) | |
# --------------------------------------------------------------------. | |
# | |
# intent/direction values | |
class Intent(IntEnum): | |
PERCEPTUAL = 0 | |
RELATIVE_COLORIMETRIC = 1 | |
SATURATION = 2 | |
ABSOLUTE_COLORIMETRIC = 3 | |
class Direction(IntEnum): | |
INPUT = 0 | |
OUTPUT = 1 | |
PROOF = 2 | |
# | |
# flags | |
class Flags(IntFlag): | |
"""Flags and documentation are taken from ``lcms2.h``.""" | |
NONE = 0 | |
NOCACHE = 0x0040 | |
"""Inhibit 1-pixel cache""" | |
NOOPTIMIZE = 0x0100 | |
"""Inhibit optimizations""" | |
NULLTRANSFORM = 0x0200 | |
"""Don't transform anyway""" | |
GAMUTCHECK = 0x1000 | |
"""Out of Gamut alarm""" | |
SOFTPROOFING = 0x4000 | |
"""Do softproofing""" | |
BLACKPOINTCOMPENSATION = 0x2000 | |
NOWHITEONWHITEFIXUP = 0x0004 | |
"""Don't fix scum dot""" | |
HIGHRESPRECALC = 0x0400 | |
"""Use more memory to give better accuracy""" | |
LOWRESPRECALC = 0x0800 | |
"""Use less memory to minimize resources""" | |
# this should be 8BITS_DEVICELINK, but that is not a valid name in Python: | |
USE_8BITS_DEVICELINK = 0x0008 | |
"""Create 8 bits devicelinks""" | |
GUESSDEVICECLASS = 0x0020 | |
"""Guess device class (for ``transform2devicelink``)""" | |
KEEP_SEQUENCE = 0x0080 | |
"""Keep profile sequence for devicelink creation""" | |
FORCE_CLUT = 0x0002 | |
"""Force CLUT optimization""" | |
CLUT_POST_LINEARIZATION = 0x0001 | |
"""create postlinearization tables if possible""" | |
CLUT_PRE_LINEARIZATION = 0x0010 | |
"""create prelinearization tables if possible""" | |
NONEGATIVES = 0x8000 | |
"""Prevent negative numbers in floating point transforms""" | |
COPY_ALPHA = 0x04000000 | |
"""Alpha channels are copied on ``cmsDoTransform()``""" | |
NODEFAULTRESOURCEDEF = 0x01000000 | |
_GRIDPOINTS_1 = 1 << 16 | |
_GRIDPOINTS_2 = 2 << 16 | |
_GRIDPOINTS_4 = 4 << 16 | |
_GRIDPOINTS_8 = 8 << 16 | |
_GRIDPOINTS_16 = 16 << 16 | |
_GRIDPOINTS_32 = 32 << 16 | |
_GRIDPOINTS_64 = 64 << 16 | |
_GRIDPOINTS_128 = 128 << 16 | |
def GRIDPOINTS(n: int) -> Flags: | |
""" | |
Fine-tune control over number of gridpoints | |
:param n: :py:class:`int` in range ``0 <= n <= 255`` | |
""" | |
return Flags.NONE | ((n & 0xFF) << 16) | |
_MAX_FLAG = reduce(operator.or_, Flags) | |
_FLAGS = { | |
"MATRIXINPUT": 1, | |
"MATRIXOUTPUT": 2, | |
"MATRIXONLY": (1 | 2), | |
"NOWHITEONWHITEFIXUP": 4, # Don't hot fix scum dot | |
# Don't create prelinearization tables on precalculated transforms | |
# (internal use): | |
"NOPRELINEARIZATION": 16, | |
"GUESSDEVICECLASS": 32, # Guess device class (for transform2devicelink) | |
"NOTCACHE": 64, # Inhibit 1-pixel cache | |
"NOTPRECALC": 256, | |
"NULLTRANSFORM": 512, # Don't transform anyway | |
"HIGHRESPRECALC": 1024, # Use more memory to give better accuracy | |
"LOWRESPRECALC": 2048, # Use less memory to minimize resources | |
"WHITEBLACKCOMPENSATION": 8192, | |
"BLACKPOINTCOMPENSATION": 8192, | |
"GAMUTCHECK": 4096, # Out of Gamut alarm | |
"SOFTPROOFING": 16384, # Do softproofing | |
"PRESERVEBLACK": 32768, # Black preservation | |
"NODEFAULTRESOURCEDEF": 16777216, # CRD special | |
"GRIDPOINTS": lambda n: (n & 0xFF) << 16, # Gridpoints | |
} | |
# --------------------------------------------------------------------. | |
# Experimental PIL-level API | |
# --------------------------------------------------------------------. | |
## | |
# Profile. | |
class ImageCmsProfile: | |
def __init__(self, profile: str | SupportsRead[bytes] | core.CmsProfile) -> None: | |
""" | |
:param profile: Either a string representing a filename, | |
a file like object containing a profile or a | |
low-level profile object | |
""" | |
if isinstance(profile, str): | |
if sys.platform == "win32": | |
profile_bytes_path = profile.encode() | |
try: | |
profile_bytes_path.decode("ascii") | |
except UnicodeDecodeError: | |
with open(profile, "rb") as f: | |
self._set(core.profile_frombytes(f.read())) | |
return | |
self._set(core.profile_open(profile), profile) | |
elif hasattr(profile, "read"): | |
self._set(core.profile_frombytes(profile.read())) | |
elif isinstance(profile, core.CmsProfile): | |
self._set(profile) | |
else: | |
msg = "Invalid type for Profile" # type: ignore[unreachable] | |
raise TypeError(msg) | |
def _set(self, profile: core.CmsProfile, filename: str | None = None) -> None: | |
self.profile = profile | |
self.filename = filename | |
self.product_name = None # profile.product_name | |
self.product_info = None # profile.product_info | |
def tobytes(self) -> bytes: | |
""" | |
Returns the profile in a format suitable for embedding in | |
saved images. | |
:returns: a bytes object containing the ICC profile. | |
""" | |
return core.profile_tobytes(self.profile) | |
class ImageCmsTransform(Image.ImagePointHandler): | |
""" | |
Transform. This can be used with the procedural API, or with the standard | |
:py:func:`~PIL.Image.Image.point` method. | |
Will return the output profile in the ``output.info['icc_profile']``. | |
""" | |
def __init__( | |
self, | |
input: ImageCmsProfile, | |
output: ImageCmsProfile, | |
input_mode: str, | |
output_mode: str, | |
intent: Intent = Intent.PERCEPTUAL, | |
proof: ImageCmsProfile | None = None, | |
proof_intent: Intent = Intent.ABSOLUTE_COLORIMETRIC, | |
flags: Flags = Flags.NONE, | |
): | |
if proof is None: | |
self.transform = core.buildTransform( | |
input.profile, output.profile, input_mode, output_mode, intent, flags | |
) | |
else: | |
self.transform = core.buildProofTransform( | |
input.profile, | |
output.profile, | |
proof.profile, | |
input_mode, | |
output_mode, | |
intent, | |
proof_intent, | |
flags, | |
) | |
# Note: inputMode and outputMode are for pyCMS compatibility only | |
self.input_mode = self.inputMode = input_mode | |
self.output_mode = self.outputMode = output_mode | |
self.output_profile = output | |
def point(self, im: Image.Image) -> Image.Image: | |
return self.apply(im) | |
def apply(self, im: Image.Image, imOut: Image.Image | None = None) -> Image.Image: | |
im.load() | |
if imOut is None: | |
imOut = Image.new(self.output_mode, im.size, None) | |
self.transform.apply(im.im.id, imOut.im.id) | |
imOut.info["icc_profile"] = self.output_profile.tobytes() | |
return imOut | |
def apply_in_place(self, im: Image.Image) -> Image.Image: | |
im.load() | |
if im.mode != self.output_mode: | |
msg = "mode mismatch" | |
raise ValueError(msg) # wrong output mode | |
self.transform.apply(im.im.id, im.im.id) | |
im.info["icc_profile"] = self.output_profile.tobytes() | |
return im | |
def get_display_profile(handle: SupportsInt | None = None) -> ImageCmsProfile | None: | |
""" | |
(experimental) Fetches the profile for the current display device. | |
:returns: ``None`` if the profile is not known. | |
""" | |
if sys.platform != "win32": | |
return None | |
from . import ImageWin # type: ignore[unused-ignore, unreachable] | |
if isinstance(handle, ImageWin.HDC): | |
profile = core.get_display_profile_win32(int(handle), 1) | |
else: | |
profile = core.get_display_profile_win32(int(handle or 0)) | |
if profile is None: | |
return None | |
return ImageCmsProfile(profile) | |
# --------------------------------------------------------------------. | |
# pyCMS compatible layer | |
# --------------------------------------------------------------------. | |
_CmsProfileCompatible = Union[ | |
str, SupportsRead[bytes], core.CmsProfile, ImageCmsProfile | |
] | |
class PyCMSError(Exception): | |
"""(pyCMS) Exception class. | |
This is used for all errors in the pyCMS API.""" | |
pass | |
def profileToProfile( | |
im: Image.Image, | |
inputProfile: _CmsProfileCompatible, | |
outputProfile: _CmsProfileCompatible, | |
renderingIntent: Intent = Intent.PERCEPTUAL, | |
outputMode: str | None = None, | |
inPlace: bool = False, | |
flags: Flags = Flags.NONE, | |
) -> Image.Image | None: | |
""" | |
(pyCMS) Applies an ICC transformation to a given image, mapping from | |
``inputProfile`` to ``outputProfile``. | |
If the input or output profiles specified are not valid filenames, a | |
:exc:`PyCMSError` will be raised. If ``inPlace`` is ``True`` and | |
``outputMode != im.mode``, a :exc:`PyCMSError` will be raised. | |
If an error occurs during application of the profiles, | |
a :exc:`PyCMSError` will be raised. | |
If ``outputMode`` is not a mode supported by the ``outputProfile`` (or by pyCMS), | |
a :exc:`PyCMSError` will be raised. | |
This function applies an ICC transformation to im from ``inputProfile``'s | |
color space to ``outputProfile``'s color space using the specified rendering | |
intent to decide how to handle out-of-gamut colors. | |
``outputMode`` can be used to specify that a color mode conversion is to | |
be done using these profiles, but the specified profiles must be able | |
to handle that mode. I.e., if converting im from RGB to CMYK using | |
profiles, the input profile must handle RGB data, and the output | |
profile must handle CMYK data. | |
:param im: An open :py:class:`~PIL.Image.Image` object (i.e. Image.new(...) | |
or Image.open(...), etc.) | |
:param inputProfile: String, as a valid filename path to the ICC input | |
profile you wish to use for this image, or a profile object | |
:param outputProfile: String, as a valid filename path to the ICC output | |
profile you wish to use for this image, or a profile object | |
:param renderingIntent: Integer (0-3) specifying the rendering intent you | |
wish to use for the transform | |
ImageCms.Intent.PERCEPTUAL = 0 (DEFAULT) | |
ImageCms.Intent.RELATIVE_COLORIMETRIC = 1 | |
ImageCms.Intent.SATURATION = 2 | |
ImageCms.Intent.ABSOLUTE_COLORIMETRIC = 3 | |
see the pyCMS documentation for details on rendering intents and what | |
they do. | |
:param outputMode: A valid PIL mode for the output image (i.e. "RGB", | |
"CMYK", etc.). Note: if rendering the image "inPlace", outputMode | |
MUST be the same mode as the input, or omitted completely. If | |
omitted, the outputMode will be the same as the mode of the input | |
image (im.mode) | |
:param inPlace: Boolean. If ``True``, the original image is modified in-place, | |
and ``None`` is returned. If ``False`` (default), a new | |
:py:class:`~PIL.Image.Image` object is returned with the transform applied. | |
:param flags: Integer (0-...) specifying additional flags | |
:returns: Either None or a new :py:class:`~PIL.Image.Image` object, depending on | |
the value of ``inPlace`` | |
:exception PyCMSError: | |
""" | |
if outputMode is None: | |
outputMode = im.mode | |
if not isinstance(renderingIntent, int) or not (0 <= renderingIntent <= 3): | |
msg = "renderingIntent must be an integer between 0 and 3" | |
raise PyCMSError(msg) | |
if not isinstance(flags, int) or not (0 <= flags <= _MAX_FLAG): | |
msg = f"flags must be an integer between 0 and {_MAX_FLAG}" | |
raise PyCMSError(msg) | |
try: | |
if not isinstance(inputProfile, ImageCmsProfile): | |
inputProfile = ImageCmsProfile(inputProfile) | |
if not isinstance(outputProfile, ImageCmsProfile): | |
outputProfile = ImageCmsProfile(outputProfile) | |
transform = ImageCmsTransform( | |
inputProfile, | |
outputProfile, | |
im.mode, | |
outputMode, | |
renderingIntent, | |
flags=flags, | |
) | |
if inPlace: | |
transform.apply_in_place(im) | |
imOut = None | |
else: | |
imOut = transform.apply(im) | |
except (OSError, TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
return imOut | |
def getOpenProfile( | |
profileFilename: str | SupportsRead[bytes] | core.CmsProfile, | |
) -> ImageCmsProfile: | |
""" | |
(pyCMS) Opens an ICC profile file. | |
The PyCMSProfile object can be passed back into pyCMS for use in creating | |
transforms and such (as in ImageCms.buildTransformFromOpenProfiles()). | |
If ``profileFilename`` is not a valid filename for an ICC profile, | |
a :exc:`PyCMSError` will be raised. | |
:param profileFilename: String, as a valid filename path to the ICC profile | |
you wish to open, or a file-like object. | |
:returns: A CmsProfile class object. | |
:exception PyCMSError: | |
""" | |
try: | |
return ImageCmsProfile(profileFilename) | |
except (OSError, TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
def buildTransform( | |
inputProfile: _CmsProfileCompatible, | |
outputProfile: _CmsProfileCompatible, | |
inMode: str, | |
outMode: str, | |
renderingIntent: Intent = Intent.PERCEPTUAL, | |
flags: Flags = Flags.NONE, | |
) -> ImageCmsTransform: | |
""" | |
(pyCMS) Builds an ICC transform mapping from the ``inputProfile`` to the | |
``outputProfile``. Use applyTransform to apply the transform to a given | |
image. | |
If the input or output profiles specified are not valid filenames, a | |
:exc:`PyCMSError` will be raised. If an error occurs during creation | |
of the transform, a :exc:`PyCMSError` will be raised. | |
If ``inMode`` or ``outMode`` are not a mode supported by the ``outputProfile`` | |
(or by pyCMS), a :exc:`PyCMSError` will be raised. | |
This function builds and returns an ICC transform from the ``inputProfile`` | |
to the ``outputProfile`` using the ``renderingIntent`` to determine what to do | |
with out-of-gamut colors. It will ONLY work for converting images that | |
are in ``inMode`` to images that are in ``outMode`` color format (PIL mode, | |
i.e. "RGB", "RGBA", "CMYK", etc.). | |
Building the transform is a fair part of the overhead in | |
ImageCms.profileToProfile(), so if you're planning on converting multiple | |
images using the same input/output settings, this can save you time. | |
Once you have a transform object, it can be used with | |
ImageCms.applyProfile() to convert images without the need to re-compute | |
the lookup table for the transform. | |
The reason pyCMS returns a class object rather than a handle directly | |
to the transform is that it needs to keep track of the PIL input/output | |
modes that the transform is meant for. These attributes are stored in | |
the ``inMode`` and ``outMode`` attributes of the object (which can be | |
manually overridden if you really want to, but I don't know of any | |
time that would be of use, or would even work). | |
:param inputProfile: String, as a valid filename path to the ICC input | |
profile you wish to use for this transform, or a profile object | |
:param outputProfile: String, as a valid filename path to the ICC output | |
profile you wish to use for this transform, or a profile object | |
:param inMode: String, as a valid PIL mode that the appropriate profile | |
also supports (i.e. "RGB", "RGBA", "CMYK", etc.) | |
:param outMode: String, as a valid PIL mode that the appropriate profile | |
also supports (i.e. "RGB", "RGBA", "CMYK", etc.) | |
:param renderingIntent: Integer (0-3) specifying the rendering intent you | |
wish to use for the transform | |
ImageCms.Intent.PERCEPTUAL = 0 (DEFAULT) | |
ImageCms.Intent.RELATIVE_COLORIMETRIC = 1 | |
ImageCms.Intent.SATURATION = 2 | |
ImageCms.Intent.ABSOLUTE_COLORIMETRIC = 3 | |
see the pyCMS documentation for details on rendering intents and what | |
they do. | |
:param flags: Integer (0-...) specifying additional flags | |
:returns: A CmsTransform class object. | |
:exception PyCMSError: | |
""" | |
if not isinstance(renderingIntent, int) or not (0 <= renderingIntent <= 3): | |
msg = "renderingIntent must be an integer between 0 and 3" | |
raise PyCMSError(msg) | |
if not isinstance(flags, int) or not (0 <= flags <= _MAX_FLAG): | |
msg = f"flags must be an integer between 0 and {_MAX_FLAG}" | |
raise PyCMSError(msg) | |
try: | |
if not isinstance(inputProfile, ImageCmsProfile): | |
inputProfile = ImageCmsProfile(inputProfile) | |
if not isinstance(outputProfile, ImageCmsProfile): | |
outputProfile = ImageCmsProfile(outputProfile) | |
return ImageCmsTransform( | |
inputProfile, outputProfile, inMode, outMode, renderingIntent, flags=flags | |
) | |
except (OSError, TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
def buildProofTransform( | |
inputProfile: _CmsProfileCompatible, | |
outputProfile: _CmsProfileCompatible, | |
proofProfile: _CmsProfileCompatible, | |
inMode: str, | |
outMode: str, | |
renderingIntent: Intent = Intent.PERCEPTUAL, | |
proofRenderingIntent: Intent = Intent.ABSOLUTE_COLORIMETRIC, | |
flags: Flags = Flags.SOFTPROOFING, | |
) -> ImageCmsTransform: | |
""" | |
(pyCMS) Builds an ICC transform mapping from the ``inputProfile`` to the | |
``outputProfile``, but tries to simulate the result that would be | |
obtained on the ``proofProfile`` device. | |
If the input, output, or proof profiles specified are not valid | |
filenames, a :exc:`PyCMSError` will be raised. | |
If an error occurs during creation of the transform, | |
a :exc:`PyCMSError` will be raised. | |
If ``inMode`` or ``outMode`` are not a mode supported by the ``outputProfile`` | |
(or by pyCMS), a :exc:`PyCMSError` will be raised. | |
This function builds and returns an ICC transform from the ``inputProfile`` | |
to the ``outputProfile``, but tries to simulate the result that would be | |
obtained on the ``proofProfile`` device using ``renderingIntent`` and | |
``proofRenderingIntent`` to determine what to do with out-of-gamut | |
colors. This is known as "soft-proofing". It will ONLY work for | |
converting images that are in ``inMode`` to images that are in outMode | |
color format (PIL mode, i.e. "RGB", "RGBA", "CMYK", etc.). | |
Usage of the resulting transform object is exactly the same as with | |
ImageCms.buildTransform(). | |
Proof profiling is generally used when using an output device to get a | |
good idea of what the final printed/displayed image would look like on | |
the ``proofProfile`` device when it's quicker and easier to use the | |
output device for judging color. Generally, this means that the | |
output device is a monitor, or a dye-sub printer (etc.), and the simulated | |
device is something more expensive, complicated, or time consuming | |
(making it difficult to make a real print for color judgement purposes). | |
Soft-proofing basically functions by adjusting the colors on the | |
output device to match the colors of the device being simulated. However, | |
when the simulated device has a much wider gamut than the output | |
device, you may obtain marginal results. | |
:param inputProfile: String, as a valid filename path to the ICC input | |
profile you wish to use for this transform, or a profile object | |
:param outputProfile: String, as a valid filename path to the ICC output | |
(monitor, usually) profile you wish to use for this transform, or a | |
profile object | |
:param proofProfile: String, as a valid filename path to the ICC proof | |
profile you wish to use for this transform, or a profile object | |
:param inMode: String, as a valid PIL mode that the appropriate profile | |
also supports (i.e. "RGB", "RGBA", "CMYK", etc.) | |
:param outMode: String, as a valid PIL mode that the appropriate profile | |
also supports (i.e. "RGB", "RGBA", "CMYK", etc.) | |
:param renderingIntent: Integer (0-3) specifying the rendering intent you | |
wish to use for the input->proof (simulated) transform | |
ImageCms.Intent.PERCEPTUAL = 0 (DEFAULT) | |
ImageCms.Intent.RELATIVE_COLORIMETRIC = 1 | |
ImageCms.Intent.SATURATION = 2 | |
ImageCms.Intent.ABSOLUTE_COLORIMETRIC = 3 | |
see the pyCMS documentation for details on rendering intents and what | |
they do. | |
:param proofRenderingIntent: Integer (0-3) specifying the rendering intent | |
you wish to use for proof->output transform | |
ImageCms.Intent.PERCEPTUAL = 0 (DEFAULT) | |
ImageCms.Intent.RELATIVE_COLORIMETRIC = 1 | |
ImageCms.Intent.SATURATION = 2 | |
ImageCms.Intent.ABSOLUTE_COLORIMETRIC = 3 | |
see the pyCMS documentation for details on rendering intents and what | |
they do. | |
:param flags: Integer (0-...) specifying additional flags | |
:returns: A CmsTransform class object. | |
:exception PyCMSError: | |
""" | |
if not isinstance(renderingIntent, int) or not (0 <= renderingIntent <= 3): | |
msg = "renderingIntent must be an integer between 0 and 3" | |
raise PyCMSError(msg) | |
if not isinstance(flags, int) or not (0 <= flags <= _MAX_FLAG): | |
msg = f"flags must be an integer between 0 and {_MAX_FLAG}" | |
raise PyCMSError(msg) | |
try: | |
if not isinstance(inputProfile, ImageCmsProfile): | |
inputProfile = ImageCmsProfile(inputProfile) | |
if not isinstance(outputProfile, ImageCmsProfile): | |
outputProfile = ImageCmsProfile(outputProfile) | |
if not isinstance(proofProfile, ImageCmsProfile): | |
proofProfile = ImageCmsProfile(proofProfile) | |
return ImageCmsTransform( | |
inputProfile, | |
outputProfile, | |
inMode, | |
outMode, | |
renderingIntent, | |
proofProfile, | |
proofRenderingIntent, | |
flags, | |
) | |
except (OSError, TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
buildTransformFromOpenProfiles = buildTransform | |
buildProofTransformFromOpenProfiles = buildProofTransform | |
def applyTransform( | |
im: Image.Image, transform: ImageCmsTransform, inPlace: bool = False | |
) -> Image.Image | None: | |
""" | |
(pyCMS) Applies a transform to a given image. | |
If ``im.mode != transform.inMode``, a :exc:`PyCMSError` is raised. | |
If ``inPlace`` is ``True`` and ``transform.inMode != transform.outMode``, a | |
:exc:`PyCMSError` is raised. | |
If ``im.mode``, ``transform.inMode`` or ``transform.outMode`` is not | |
supported by pyCMSdll or the profiles you used for the transform, a | |
:exc:`PyCMSError` is raised. | |
If an error occurs while the transform is being applied, | |
a :exc:`PyCMSError` is raised. | |
This function applies a pre-calculated transform (from | |
ImageCms.buildTransform() or ImageCms.buildTransformFromOpenProfiles()) | |
to an image. The transform can be used for multiple images, saving | |
considerable calculation time if doing the same conversion multiple times. | |
If you want to modify im in-place instead of receiving a new image as | |
the return value, set ``inPlace`` to ``True``. This can only be done if | |
``transform.inMode`` and ``transform.outMode`` are the same, because we can't | |
change the mode in-place (the buffer sizes for some modes are | |
different). The default behavior is to return a new :py:class:`~PIL.Image.Image` | |
object of the same dimensions in mode ``transform.outMode``. | |
:param im: An :py:class:`~PIL.Image.Image` object, and im.mode must be the same | |
as the ``inMode`` supported by the transform. | |
:param transform: A valid CmsTransform class object | |
:param inPlace: Bool. If ``True``, ``im`` is modified in place and ``None`` is | |
returned, if ``False``, a new :py:class:`~PIL.Image.Image` object with the | |
transform applied is returned (and ``im`` is not changed). The default is | |
``False``. | |
:returns: Either ``None``, or a new :py:class:`~PIL.Image.Image` object, | |
depending on the value of ``inPlace``. The profile will be returned in | |
the image's ``info['icc_profile']``. | |
:exception PyCMSError: | |
""" | |
try: | |
if inPlace: | |
transform.apply_in_place(im) | |
imOut = None | |
else: | |
imOut = transform.apply(im) | |
except (TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
return imOut | |
def createProfile( | |
colorSpace: Literal["LAB", "XYZ", "sRGB"], colorTemp: SupportsFloat = -1 | |
) -> core.CmsProfile: | |
""" | |
(pyCMS) Creates a profile. | |
If colorSpace not in ``["LAB", "XYZ", "sRGB"]``, | |
a :exc:`PyCMSError` is raised. | |
If using LAB and ``colorTemp`` is not a positive integer, | |
a :exc:`PyCMSError` is raised. | |
If an error occurs while creating the profile, | |
a :exc:`PyCMSError` is raised. | |
Use this function to create common profiles on-the-fly instead of | |
having to supply a profile on disk and knowing the path to it. It | |
returns a normal CmsProfile object that can be passed to | |
ImageCms.buildTransformFromOpenProfiles() to create a transform to apply | |
to images. | |
:param colorSpace: String, the color space of the profile you wish to | |
create. | |
Currently only "LAB", "XYZ", and "sRGB" are supported. | |
:param colorTemp: Positive integer for the white point for the profile, in | |
degrees Kelvin (i.e. 5000, 6500, 9600, etc.). The default is for D50 | |
illuminant if omitted (5000k). colorTemp is ONLY applied to LAB | |
profiles, and is ignored for XYZ and sRGB. | |
:returns: A CmsProfile class object | |
:exception PyCMSError: | |
""" | |
if colorSpace not in ["LAB", "XYZ", "sRGB"]: | |
msg = ( | |
f"Color space not supported for on-the-fly profile creation ({colorSpace})" | |
) | |
raise PyCMSError(msg) | |
if colorSpace == "LAB": | |
try: | |
colorTemp = float(colorTemp) | |
except (TypeError, ValueError) as e: | |
msg = f'Color temperature must be numeric, "{colorTemp}" not valid' | |
raise PyCMSError(msg) from e | |
try: | |
return core.createProfile(colorSpace, colorTemp) | |
except (TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
def getProfileName(profile: _CmsProfileCompatible) -> str: | |
""" | |
(pyCMS) Gets the internal product name for the given profile. | |
If ``profile`` isn't a valid CmsProfile object or filename to a profile, | |
a :exc:`PyCMSError` is raised If an error occurs while trying | |
to obtain the name tag, a :exc:`PyCMSError` is raised. | |
Use this function to obtain the INTERNAL name of the profile (stored | |
in an ICC tag in the profile itself), usually the one used when the | |
profile was originally created. Sometimes this tag also contains | |
additional information supplied by the creator. | |
:param profile: EITHER a valid CmsProfile object, OR a string of the | |
filename of an ICC profile. | |
:returns: A string containing the internal name of the profile as stored | |
in an ICC tag. | |
:exception PyCMSError: | |
""" | |
try: | |
# add an extra newline to preserve pyCMS compatibility | |
if not isinstance(profile, ImageCmsProfile): | |
profile = ImageCmsProfile(profile) | |
# do it in python, not c. | |
# // name was "%s - %s" (model, manufacturer) || Description , | |
# // but if the Model and Manufacturer were the same or the model | |
# // was long, Just the model, in 1.x | |
model = profile.profile.model | |
manufacturer = profile.profile.manufacturer | |
if not (model or manufacturer): | |
return (profile.profile.profile_description or "") + "\n" | |
if not manufacturer or len(model) > 30: # type: ignore[arg-type] | |
return model + "\n" # type: ignore[operator] | |
return f"{model} - {manufacturer}\n" | |
except (AttributeError, OSError, TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
def getProfileInfo(profile: _CmsProfileCompatible) -> str: | |
""" | |
(pyCMS) Gets the internal product information for the given profile. | |
If ``profile`` isn't a valid CmsProfile object or filename to a profile, | |
a :exc:`PyCMSError` is raised. | |
If an error occurs while trying to obtain the info tag, | |
a :exc:`PyCMSError` is raised. | |
Use this function to obtain the information stored in the profile's | |
info tag. This often contains details about the profile, and how it | |
was created, as supplied by the creator. | |
:param profile: EITHER a valid CmsProfile object, OR a string of the | |
filename of an ICC profile. | |
:returns: A string containing the internal profile information stored in | |
an ICC tag. | |
:exception PyCMSError: | |
""" | |
try: | |
if not isinstance(profile, ImageCmsProfile): | |
profile = ImageCmsProfile(profile) | |
# add an extra newline to preserve pyCMS compatibility | |
# Python, not C. the white point bits weren't working well, | |
# so skipping. | |
# info was description \r\n\r\n copyright \r\n\r\n K007 tag \r\n\r\n whitepoint | |
description = profile.profile.profile_description | |
cpright = profile.profile.copyright | |
elements = [element for element in (description, cpright) if element] | |
return "\r\n\r\n".join(elements) + "\r\n\r\n" | |
except (AttributeError, OSError, TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
def getProfileCopyright(profile: _CmsProfileCompatible) -> str: | |
""" | |
(pyCMS) Gets the copyright for the given profile. | |
If ``profile`` isn't a valid CmsProfile object or filename to a profile, a | |
:exc:`PyCMSError` is raised. | |
If an error occurs while trying to obtain the copyright tag, | |
a :exc:`PyCMSError` is raised. | |
Use this function to obtain the information stored in the profile's | |
copyright tag. | |
:param profile: EITHER a valid CmsProfile object, OR a string of the | |
filename of an ICC profile. | |
:returns: A string containing the internal profile information stored in | |
an ICC tag. | |
:exception PyCMSError: | |
""" | |
try: | |
# add an extra newline to preserve pyCMS compatibility | |
if not isinstance(profile, ImageCmsProfile): | |
profile = ImageCmsProfile(profile) | |
return (profile.profile.copyright or "") + "\n" | |
except (AttributeError, OSError, TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
def getProfileManufacturer(profile: _CmsProfileCompatible) -> str: | |
""" | |
(pyCMS) Gets the manufacturer for the given profile. | |
If ``profile`` isn't a valid CmsProfile object or filename to a profile, a | |
:exc:`PyCMSError` is raised. | |
If an error occurs while trying to obtain the manufacturer tag, a | |
:exc:`PyCMSError` is raised. | |
Use this function to obtain the information stored in the profile's | |
manufacturer tag. | |
:param profile: EITHER a valid CmsProfile object, OR a string of the | |
filename of an ICC profile. | |
:returns: A string containing the internal profile information stored in | |
an ICC tag. | |
:exception PyCMSError: | |
""" | |
try: | |
# add an extra newline to preserve pyCMS compatibility | |
if not isinstance(profile, ImageCmsProfile): | |
profile = ImageCmsProfile(profile) | |
return (profile.profile.manufacturer or "") + "\n" | |
except (AttributeError, OSError, TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
def getProfileModel(profile: _CmsProfileCompatible) -> str: | |
""" | |
(pyCMS) Gets the model for the given profile. | |
If ``profile`` isn't a valid CmsProfile object or filename to a profile, a | |
:exc:`PyCMSError` is raised. | |
If an error occurs while trying to obtain the model tag, | |
a :exc:`PyCMSError` is raised. | |
Use this function to obtain the information stored in the profile's | |
model tag. | |
:param profile: EITHER a valid CmsProfile object, OR a string of the | |
filename of an ICC profile. | |
:returns: A string containing the internal profile information stored in | |
an ICC tag. | |
:exception PyCMSError: | |
""" | |
try: | |
# add an extra newline to preserve pyCMS compatibility | |
if not isinstance(profile, ImageCmsProfile): | |
profile = ImageCmsProfile(profile) | |
return (profile.profile.model or "") + "\n" | |
except (AttributeError, OSError, TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
def getProfileDescription(profile: _CmsProfileCompatible) -> str: | |
""" | |
(pyCMS) Gets the description for the given profile. | |
If ``profile`` isn't a valid CmsProfile object or filename to a profile, a | |
:exc:`PyCMSError` is raised. | |
If an error occurs while trying to obtain the description tag, | |
a :exc:`PyCMSError` is raised. | |
Use this function to obtain the information stored in the profile's | |
description tag. | |
:param profile: EITHER a valid CmsProfile object, OR a string of the | |
filename of an ICC profile. | |
:returns: A string containing the internal profile information stored in an | |
ICC tag. | |
:exception PyCMSError: | |
""" | |
try: | |
# add an extra newline to preserve pyCMS compatibility | |
if not isinstance(profile, ImageCmsProfile): | |
profile = ImageCmsProfile(profile) | |
return (profile.profile.profile_description or "") + "\n" | |
except (AttributeError, OSError, TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
def getDefaultIntent(profile: _CmsProfileCompatible) -> int: | |
""" | |
(pyCMS) Gets the default intent name for the given profile. | |
If ``profile`` isn't a valid CmsProfile object or filename to a profile, a | |
:exc:`PyCMSError` is raised. | |
If an error occurs while trying to obtain the default intent, a | |
:exc:`PyCMSError` is raised. | |
Use this function to determine the default (and usually best optimized) | |
rendering intent for this profile. Most profiles support multiple | |
rendering intents, but are intended mostly for one type of conversion. | |
If you wish to use a different intent than returned, use | |
ImageCms.isIntentSupported() to verify it will work first. | |
:param profile: EITHER a valid CmsProfile object, OR a string of the | |
filename of an ICC profile. | |
:returns: Integer 0-3 specifying the default rendering intent for this | |
profile. | |
ImageCms.Intent.PERCEPTUAL = 0 (DEFAULT) | |
ImageCms.Intent.RELATIVE_COLORIMETRIC = 1 | |
ImageCms.Intent.SATURATION = 2 | |
ImageCms.Intent.ABSOLUTE_COLORIMETRIC = 3 | |
see the pyCMS documentation for details on rendering intents and what | |
they do. | |
:exception PyCMSError: | |
""" | |
try: | |
if not isinstance(profile, ImageCmsProfile): | |
profile = ImageCmsProfile(profile) | |
return profile.profile.rendering_intent | |
except (AttributeError, OSError, TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
def isIntentSupported( | |
profile: _CmsProfileCompatible, intent: Intent, direction: Direction | |
) -> Literal[-1, 1]: | |
""" | |
(pyCMS) Checks if a given intent is supported. | |
Use this function to verify that you can use your desired | |
``intent`` with ``profile``, and that ``profile`` can be used for the | |
input/output/proof profile as you desire. | |
Some profiles are created specifically for one "direction", can cannot | |
be used for others. Some profiles can only be used for certain | |
rendering intents, so it's best to either verify this before trying | |
to create a transform with them (using this function), or catch the | |
potential :exc:`PyCMSError` that will occur if they don't | |
support the modes you select. | |
:param profile: EITHER a valid CmsProfile object, OR a string of the | |
filename of an ICC profile. | |
:param intent: Integer (0-3) specifying the rendering intent you wish to | |
use with this profile | |
ImageCms.Intent.PERCEPTUAL = 0 (DEFAULT) | |
ImageCms.Intent.RELATIVE_COLORIMETRIC = 1 | |
ImageCms.Intent.SATURATION = 2 | |
ImageCms.Intent.ABSOLUTE_COLORIMETRIC = 3 | |
see the pyCMS documentation for details on rendering intents and what | |
they do. | |
:param direction: Integer specifying if the profile is to be used for | |
input, output, or proof | |
INPUT = 0 (or use ImageCms.Direction.INPUT) | |
OUTPUT = 1 (or use ImageCms.Direction.OUTPUT) | |
PROOF = 2 (or use ImageCms.Direction.PROOF) | |
:returns: 1 if the intent/direction are supported, -1 if they are not. | |
:exception PyCMSError: | |
""" | |
try: | |
if not isinstance(profile, ImageCmsProfile): | |
profile = ImageCmsProfile(profile) | |
# FIXME: I get different results for the same data w. different | |
# compilers. Bug in LittleCMS or in the binding? | |
if profile.profile.is_intent_supported(intent, direction): | |
return 1 | |
else: | |
return -1 | |
except (AttributeError, OSError, TypeError, ValueError) as v: | |
raise PyCMSError(v) from v | |
def versions() -> tuple[str, str, str, str]: | |
""" | |
(pyCMS) Fetches versions. | |
""" | |
deprecate( | |
"PIL.ImageCms.versions()", | |
12, | |
'(PIL.features.version("littlecms2"), sys.version, PIL.__version__)', | |
) | |
return _VERSION, core.littlecms_version, sys.version.split()[0], __version__ | |