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imageops.py
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imageops.py
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# Copyright (c) 2023, Teriks
#
# dgenerate is distributed under the following BSD 3-Clause License
#
# Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import PIL.Image
import PIL.ImageOps
import dgenerate.imageprocessors.imageprocessor as _imageprocessor
import dgenerate.types as _types
class MirrorFlipProcessor(_imageprocessor.ImageProcessor):
"""
Implements the "mirror" and "flip" PIL.ImageOps operations
as an image imageprocessor
"""
NAMES = ['mirror', 'flip']
@staticmethod
def help(loaded_by_name):
if loaded_by_name == 'mirror':
return 'Mirror the input image horizontally.'
if loaded_by_name == 'flip':
return 'Flip the input image vertically.'
def __init__(self, **kwargs):
"""
:param kwargs: forwarded to base class
"""
super().__init__(**kwargs)
if self.loaded_by_name == 'flip':
self._func = PIL.ImageOps.flip
elif self.loaded_by_name == 'mirror':
self._func = PIL.ImageOps.mirror
def impl_pre_resize(self, image: PIL.Image.Image, resize_resolution: _types.OptionalSize):
"""
Mirrors or flips the image depending on what name was used to invoke this
imageprocessor implementation.
:param image: image to process
:param resize_resolution: purely informational, is unused by this imageprocessor
:return: the mirrored or flipped image.
"""
return self._func(image)
def impl_post_resize(self, image: PIL.Image.Image):
"""
Post resize, for this imageprocessor nothing happens post-resize.
:param image: image to process
:return: the same image
"""
return image
class SimpleColorProcessor(_imageprocessor.ImageProcessor):
"""
Implements the "grayscale" and "invert" PIL.ImageOps operations
as an image imageprocessor.
"""
NAMES = ['grayscale', 'invert']
@staticmethod
def help(loaded_by_name):
if loaded_by_name == 'grayscale':
return 'Convert the input image to grayscale.'
if loaded_by_name == 'invert':
return 'Invert the colors of the input image.'
def __init__(self, **kwargs):
"""
:param kwargs: forwarded to base class
"""
super().__init__(**kwargs)
if self.loaded_by_name == 'grayscale':
self._func = PIL.ImageOps.grayscale
elif self.loaded_by_name == 'invert':
self._func = PIL.ImageOps.invert
def impl_pre_resize(self, image: PIL.Image.Image, resize_resolution: _types.OptionalSize):
"""
Pre resize, for this imageprocessor nothing happens pre-resize.
:param image: image to process
:param resize_resolution: purely informational, is unused by this imageprocessor
:return: the same image
"""
return image
def impl_post_resize(self, image: PIL.Image.Image):
"""
Invert or grayscale the image depending on which name was used to invoke this imageprocessor.
:param image: image to process
:return: the inverted or grayscale image
"""
return self._func(image)
class PosterizeProcessor(_imageprocessor.ImageProcessor):
"""
Posterize the input image with PIL.ImageOps.posterize.
Accepts the argument 'bits', an integer value from 1 to 8.
"""
NAMES = ['posterize']
def __init__(self, bits: int, **kwargs):
"""
:param bits: required argument, integer value from 1 to 8
:param kwargs: forwarded to base class
"""
super().__init__(**kwargs)
self._bits = bits
if self._bits < 1 or self._bits > 8:
raise self.argument_error(
f'Argument "bits" must be an integer value from 1 to 8, received {self._bits}.')
def impl_pre_resize(self, image: PIL.Image.Image, resize_resolution: _types.OptionalSize):
"""
Posterize operation is preformed by this method.
:param image: image to process
:param resize_resolution: purely informational, is unused by this imageprocessor
:return: the posterized image
"""
return PIL.ImageOps.posterize(image, self._bits)
def impl_post_resize(self, image: PIL.Image.Image):
"""
Post resize, for this imageprocessor nothing happens post-resize.
:param image: image to process
:return: the same image
"""
return image
class SolarizeProcessor(_imageprocessor.ImageProcessor):
"""
Solarize the input image with PIL.ImageOps.solarize.
Accepts the argument "threshold" which is an integer value from 0 to 255.
"""
NAMES = ['solarize']
def __init__(self, threshold: int = 128, **kwargs):
"""
:param threshold: integer value from 0 to 255, default is 128
:param kwargs: forwarded to base class
"""
super().__init__(**kwargs)
self._threshold = threshold
if self._threshold < 0 or self._threshold > 255:
raise self.argument_error(
f'Argument "threshold" must be an integer value from 0 to 255, received {self._threshold}.')
def impl_pre_resize(self, image: PIL.Image.Image, resize_resolution: _types.OptionalSize):
"""
Solarize operation is preformed by this method.
:param image: image to process
:param resize_resolution: purely informational, is unused by this imageprocessor
:return: the solarized image
"""
return PIL.ImageOps.solarize(image, self._threshold)
def impl_post_resize(self, image: PIL.Image.Image):
"""
Post resize, for this imageprocessor nothing happens post-resize.
:param image: image to process
:return: the same image
"""
return image
__all__ = _types.module_all()