libervia-backend: sat/tools/image.py annotate

annotate sat/tools/image.py @ 3502:6132d363f0e9

plugin XEP-0277: user friendly ID: when publishing a blog post without `id` specified, instead of using uuid, a user friendly ID based on title or content is used. This allow to have better URLs in web frontend. There is a (very low) risk of name collision if several articles with the same title or content are published on the same pubsub node, user friendly ID can be deactivated by using `user_friendly_id=False` in blog data to avoid that.

author	Goffi <goffi@goffi.org>
date	Fri, 16 Apr 2021 18:33:00 +0200
parents	7550ae9cfbac
children	524856bd7b19

rev	line source
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	1 #!/usr/bin/env python3
3137 559a625a236b fixed shebangs Goffi <goffi@goffi.org> parents: 3136 diff changeset	2
3480 7550ae9cfbac Renamed the project from "Salut à Toi" to "Libervia": Goffi <goffi@goffi.org> parents: 3479 diff changeset	3 # Libervia: an XMPP client
3479 be6d91572633 date update Goffi <goffi@goffi.org> parents: 3477 diff changeset	4 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	5
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	6 # This program is free software: you can redistribute it and/or modify
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	7 # it under the terms of the GNU Affero General Public License as published by
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	8 # the Free Software Foundation, either version 3 of the License, or
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	9 # (at your option) any later version.
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	10
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	11 # This program is distributed in the hope that it will be useful,
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	14 # GNU Affero General Public License for more details.
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	15
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	16 # You should have received a copy of the GNU Affero General Public License
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	18
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	19 """Methods to manipulate images"""
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	20
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	21 import tempfile
3252 54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	22 import mimetypes
3332 1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	23 from PIL import Image, ImageOps
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	24 from pathlib import Path
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	25 from twisted.internet import threads
3259 f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	26 from sat.core.i18n import _
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	27 from sat.core import exceptions
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	28 from sat.core.log import getLogger
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	29
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	30 log = getLogger(__name__)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	31
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	32 try:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	33 import cairosvg
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	34 except Exception as e:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	35 log.warning(_("SVG support not available, please install cairosvg: {e}").format(
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	36 e=e))
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	37 cairosvg = None
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	38
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	39
3220 4fbea7f1e012 tools (images): methods renaming Goffi <goffi@goffi.org> parents: 3200 diff changeset	40 def check(host, path, max_size=None):
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	41 """Analyze image and return a report
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	42
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	43 report will indicate if image is too large, and the recommended new size if this is
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	44 the case
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	45 @param host: SàT instance
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	46 @param path(str, pathlib.Path): image to open
3200 5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	47 @param max_size(tuple[int, int]): maximum accepted size of image
5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	48 None to use value set in config
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	49 @return dict: report on image, with following keys:
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	50 - too_large: true if image is oversized
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	51 - recommended_size: if too_large is True, recommended size to use
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	52 """
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	53 report = {}
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	54 image = Image.open(path)
3200 5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	55 if max_size is None:
5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	56 max_size = tuple(host.memory.getConfig(None, "image_max", (1200, 720)))
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	57 if image.size > max_size:
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	58 report['too_large'] = True
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	59 if image.size[0] > max_size[0]:
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	60 factor = max_size[0] / image.size[0]
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	61 if image.size[1] * factor > max_size[1]:
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	62 factor = max_size[1] / image.size[1]
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	63 else:
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	64 factor = max_size[1] / image.size[1]
3157 8b4354b5c05f tools (images): fixed type for recommended_size. Goffi <goffi@goffi.org> parents: 3137 diff changeset	65 report['recommended_size'] = [int(image.widthfactor), int(image.heightfactor)]
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	66 else:
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	67 report['too_large'] = False
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	68
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	69 return report
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	70
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	71
3332 1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	72 def _resize_blocking(image_path, new_size, dest, fix_orientation):
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	73 im_path = Path(image_path)
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	74 im = Image.open(im_path)
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	75 resized = im.resize(new_size, Image.LANCZOS)
3332 1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	76 if fix_orientation:
3477 9498f32ba6f7 tools (image): fix bad method name used when `fix_orientation` is set in `resize` Goffi <goffi@goffi.org> parents: 3332 diff changeset	77 resized = ImageOps.exif_transpose(resized)
3200 5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	78
5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	79 if dest is None:
5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	80 dest = tempfile.NamedTemporaryFile(suffix=im_path.suffix, delete=False)
5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	81 elif isinstance(dest, Path):
3220 4fbea7f1e012 tools (images): methods renaming Goffi <goffi@goffi.org> parents: 3200 diff changeset	82 dest = dest.open('wb')
3200 5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	83
5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	84 with dest as f:
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	85 resized.save(f, format=im.format)
3200 5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	86
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	87 return Path(f.name)
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	88
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	89
3332 1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	90 def resize(image_path, new_size, dest=None, fix_orientation=True):
3200 5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	91 """Resize an image to a new file, and return its path
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	92
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	93 @param image_path(str, Path): path of the original image
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	94 @param new_size(tuple[int, int]): size to use for new image
3200 5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	95 @param dest(None, Path, file): where the resized image must be stored, can be:
5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	96 - None: use a temporary file
3259 f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	97 file will be converted to PNG
3200 5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	98 - Path: path to the file to create/overwrite
5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	99 - file: a file object which must be opened for writing in binary mode
3332 1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	100 @param fix_orientation: if True, use EXIF data to set orientation
3200 5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	101 @return (Path): path of the resized file.
5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	102 The image at this path should be deleted after use
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	103 """
3332 1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	104 return threads.deferToThread(
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	105 _resize_blocking, image_path, new_size, dest, fix_orientation)
3252 54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	106
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	107
3332 1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	108 def _convert_blocking(image_path, dest, extra):
3259 f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	109 media_type = mimetypes.guess_type(str(image_path), strict=False)[0]
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	110
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	111 if dest is None:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	112 dest = tempfile.NamedTemporaryFile(suffix=".png", delete=False)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	113 filepath = Path(dest.name)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	114 elif isinstance(dest, Path):
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	115 filepath = dest
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	116 else:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	117 # we should have a file-like object
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	118 try:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	119 name = dest.name
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	120 except AttributeError:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	121 name = None
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	122 if name:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	123 try:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	124 filepath = Path(name)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	125 except TypeError:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	126 filepath = Path('noname.png')
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	127 else:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	128 filepath = Path('noname.png')
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	129
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	130 if media_type == "image/svg+xml":
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	131 if cairosvg is None:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	132 raise exceptions.MissingModule(
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	133 f"Can't convert SVG image at {image_path} due to missing CairoSVG module")
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	134 width, height = extra.get('width'), extra.get('height')
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	135 cairosvg.svg2png(
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	136 url=str(image_path), write_to=dest,
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	137 output_width=width, output_height=height
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	138 )
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	139 else:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	140 suffix = filepath.suffix
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	141 if not suffix:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	142 raise ValueError(
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	143 "A suffix is missing for destination, it is needed to determine file "
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	144 "format")
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	145 if not suffix in Image.EXTENSION:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	146 Image.init()
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	147 try:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	148 im_format = Image.EXTENSION[suffix]
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	149 except KeyError:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	150 raise ValueError(
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	151 "Dest image format can't be determined, {suffix!r} suffix is unknown"
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	152 )
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	153 im = Image.open(image_path)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	154 im.save(dest, format=im_format)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	155
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	156 log.debug(f"image {image_path} has been converted to {filepath}")
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	157 return filepath
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	158
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	159
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	160 def convert(image_path, dest=None, extra=None):
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	161 """Convert an image to a new file, and return its path
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	162
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	163 @param image_path(str, Path): path of the image to convert
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	164 @param dest(None, Path, file): where the converted image must be stored, can be:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	165 - None: use a temporary file
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	166 - Path: path to the file to create/overwrite
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	167 - file: a file object which must be opened for writing in binary mode
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	168 @param extra(None, dict): conversion options
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	169 if image_path link to a SVG file, following options can be used:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	170 - width: destination width
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	171 - height: destination height
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	172 @return (Path): path of the converted file.
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	173 a generic name is used if dest is an unnamed file like object
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	174 """
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	175 image_path = Path(image_path)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	176 if not image_path.is_file():
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	177 raise ValueError(f"There is no file at {image_path}!")
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	178 if extra is None:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	179 extra = {}
3332 1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	180 return threads.deferToThread(_convert_blocking, image_path, dest, extra)
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	181
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	182
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	183 def __fix_orientation_blocking(image_path):
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	184 im = Image.open(image_path)
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	185 im_format = im.format
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	186 exif = im.getexif()
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	187 orientation = exif.get(0x0112)
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	188 if orientation is None or orientation<2:
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	189 # nothing to do
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	190 return False
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	191 im = ImageOps.exif_transpose(im)
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	192 im.save(image_path, im_format)
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	193 log.debug(f"image {image_path} orientation has been fixed")
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	194 return True
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	195
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	196
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	197 def fix_orientation(image_path: Path) -> bool:
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	198 """Apply orientation found in EXIF data if any
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	199
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	200 @param image_path: image location, image will be modified in place
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	201 @return True if image has been modified
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	202 """
1512cbd6c4ac tools (image): fix_orientation on resize + `fix_orientation` method: Goffi <goffi@goffi.org> parents: 3259 diff changeset	203 return threads.deferToThread(__fix_orientation_blocking, image_path)
3259 f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	204
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	205
3252 54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	206 def guess_type(source):
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	207 """Guess image media type
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	208
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	209 @param source(str, Path, file): image to guess type
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	210 @return (str, None): media type, or None if we can't guess
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	211 """
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	212 if isinstance(source, str):
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	213 source = Path(source)
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	214
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	215 if isinstance(source, Path):
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	216 # we first try to guess from file name
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	217 media_type = mimetypes.guess_type(source, strict=False)[0]
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	218 if media_type is not None:
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	219 return media_type
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	220
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	221 # file name is not enough, we try to open it
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	222 img = Image.open(source)
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	223 try:
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	224 return Image.MIME[img.format]
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	225 except KeyError:
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	226 return None

Mercurial > libervia-backend

annotate sat/tools/image.py @ 3502:6132d363f0e9