96 lines
3.6 KiB
Python
96 lines
3.6 KiB
Python
import imghdr
|
|
import os
|
|
from typing import Set
|
|
|
|
import cairo
|
|
|
|
import gi
|
|
gi.require_version('GdkPixbuf', '2.0')
|
|
from gi.repository import GdkPixbuf, GLib
|
|
|
|
from . import exiftool
|
|
|
|
# Make pyflakes happy
|
|
assert Set
|
|
|
|
class PNGParser(exiftool.ExiftoolParser):
|
|
mimetypes = {'image/png', }
|
|
meta_whitelist = {'SourceFile', 'ExifToolVersion', 'FileName',
|
|
'Directory', 'FileSize', 'FileModifyDate',
|
|
'FileAccessDate', 'FileInodeChangeDate',
|
|
'FilePermissions', 'FileType', 'FileTypeExtension',
|
|
'MIMEType', 'ImageWidth', 'BitDepth', 'ColorType',
|
|
'Compression', 'Filter', 'Interlace', 'BackgroundColor',
|
|
'ImageSize', 'Megapixels', 'ImageHeight'}
|
|
|
|
def __init__(self, filename):
|
|
super().__init__(filename)
|
|
|
|
if imghdr.what(filename) != 'png':
|
|
raise ValueError
|
|
|
|
try: # better fail here than later
|
|
cairo.ImageSurface.create_from_png(self.filename)
|
|
except MemoryError: # pragma: no cover
|
|
raise ValueError
|
|
|
|
def remove_all(self) -> bool:
|
|
if self.lightweight_cleaning:
|
|
return self._lightweight_cleanup()
|
|
surface = cairo.ImageSurface.create_from_png(self.filename)
|
|
surface.write_to_png(self.output_filename)
|
|
return True
|
|
|
|
|
|
class GdkPixbufAbstractParser(exiftool.ExiftoolParser):
|
|
""" GdkPixbuf can handle a lot of surfaces, so we're rending images on it,
|
|
this has the side-effect of completely removing metadata.
|
|
"""
|
|
_type = ''
|
|
|
|
def __init__(self, filename):
|
|
super().__init__(filename)
|
|
# we can't use imghdr here because of https://bugs.python.org/issue28591
|
|
try:
|
|
GdkPixbuf.Pixbuf.new_from_file(self.filename)
|
|
except GLib.GError:
|
|
raise ValueError
|
|
|
|
def remove_all(self) -> bool:
|
|
if self.lightweight_cleaning:
|
|
return self._lightweight_cleanup()
|
|
|
|
_, extension = os.path.splitext(self.filename)
|
|
pixbuf = GdkPixbuf.Pixbuf.new_from_file(self.filename)
|
|
if extension.lower() == '.jpg':
|
|
extension = '.jpeg' # gdk is picky
|
|
pixbuf.savev(self.output_filename, type=extension[1:], option_keys=[], option_values=[])
|
|
return True
|
|
|
|
|
|
class JPGParser(GdkPixbufAbstractParser):
|
|
_type = 'jpeg'
|
|
mimetypes = {'image/jpeg'}
|
|
meta_whitelist = {'SourceFile', 'ExifToolVersion', 'FileName',
|
|
'Directory', 'FileSize', 'FileModifyDate',
|
|
'FileAccessDate', "FileInodeChangeDate",
|
|
'FilePermissions', 'FileType', 'FileTypeExtension',
|
|
'MIMEType', 'ImageWidth', 'ImageSize', 'BitsPerSample',
|
|
'ColorComponents', 'EncodingProcess', 'JFIFVersion',
|
|
'ResolutionUnit', 'XResolution', 'YCbCrSubSampling',
|
|
'YResolution', 'Megapixels', 'ImageHeight'}
|
|
|
|
|
|
class TiffParser(GdkPixbufAbstractParser):
|
|
_type = 'tiff'
|
|
mimetypes = {'image/tiff'}
|
|
meta_whitelist = {'Compression', 'ExifByteOrder', 'ExtraSamples',
|
|
'FillOrder', 'PhotometricInterpretation',
|
|
'PlanarConfiguration', 'RowsPerStrip', 'SamplesPerPixel',
|
|
'StripByteCounts', 'StripOffsets', 'BitsPerSample',
|
|
'Directory', 'ExifToolVersion', 'FileAccessDate',
|
|
'FileInodeChangeDate', 'FileModifyDate', 'FileName',
|
|
'FilePermissions', 'FileSize', 'FileType',
|
|
'FileTypeExtension', 'ImageHeight', 'ImageSize',
|
|
'ImageWidth', 'MIMEType', 'Megapixels', 'SourceFile'}
|