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

annotate sat/tools/image.py @ 3310:e4121a1f2399

tools (common/data_objects): removed deprecated code: `BlogItem`, `BlogItems` and `parsePubSubMetadata` are not needed anymore with the new blog data serialisation.

author	Goffi <goffi@goffi.org>
date	Thu, 16 Jul 2020 09:07:26 +0200
parents	f300d78f08f3
children	1512cbd6c4ac

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
3220 4fbea7f1e012 tools (images): methods renaming Goffi <goffi@goffi.org> parents: 3200 diff changeset	3 # SàT: an XMPP client
3136 9d0df638c8b4 dates update Goffi <goffi@goffi.org> parents: 3066 diff changeset	4 # Copyright (C) 2009-2020 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
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	23 from PIL import Image
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
3259 f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	72 def _resizeBlocking(image_path, new_size, dest):
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)
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	76
5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	77 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	78 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	79 elif isinstance(dest, Path):
3220 4fbea7f1e012 tools (images): methods renaming Goffi <goffi@goffi.org> parents: 3200 diff changeset	80 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	81
5c3bf37f2202 tools (images): max_size can now be manually specified in checkImage and dest in resizeImage: Goffi <goffi@goffi.org> parents: 3157 diff changeset	82 with dest as f:
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	83 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	84
3066 2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	85 return Path(f.name)
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	86
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	87
3220 4fbea7f1e012 tools (images): methods renaming Goffi <goffi@goffi.org> parents: 3200 diff changeset	88 def resize(image_path, new_size, dest=None):
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	89 """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	90
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	91 @param image_path(str, Path): path of the original image
2cc2f65379f7 core: added imageCheck and imageResize methods: Goffi <goffi@goffi.org> parents: diff changeset	92 @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	93 @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	94 - None: use a temporary file
3259 f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	95 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	96 - 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	97 - file: a file object which must be opened for writing in binary mode
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 @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	99 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	100 """
3220 4fbea7f1e012 tools (images): methods renaming Goffi <goffi@goffi.org> parents: 3200 diff changeset	101 return threads.deferToThread(_resizeBlocking, image_path, new_size, dest)
3252 54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	102
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	103
3259 f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	104 def _convertBlocking(image_path, dest, extra):
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	105 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	106
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	107 if dest is None:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	108 dest = tempfile.NamedTemporaryFile(suffix=".png", delete=False)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	109 filepath = Path(dest.name)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	110 elif isinstance(dest, Path):
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	111 filepath = dest
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	112 else:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	113 # we should have a file-like object
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	114 try:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	115 name = dest.name
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	116 except AttributeError:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	117 name = None
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	118 if name:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	119 try:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	120 filepath = Path(name)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	121 except TypeError:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	122 filepath = Path('noname.png')
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	123 else:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	124 filepath = Path('noname.png')
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	125
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	126 if media_type == "image/svg+xml":
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	127 if cairosvg is None:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	128 raise exceptions.MissingModule(
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	129 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	130 width, height = extra.get('width'), extra.get('height')
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	131 cairosvg.svg2png(
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	132 url=str(image_path), write_to=dest,
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	133 output_width=width, output_height=height
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	134 )
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	135 else:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	136 suffix = filepath.suffix
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	137 if not suffix:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	138 raise ValueError(
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	139 "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	140 "format")
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	141 if not suffix in Image.EXTENSION:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	142 Image.init()
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	143 try:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	144 im_format = Image.EXTENSION[suffix]
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	145 except KeyError:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	146 raise ValueError(
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	147 "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	148 )
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	149 im = Image.open(image_path)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	150 im.save(dest, format=im_format)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	151
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	152 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	153 return filepath
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	154
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 def convert(image_path, dest=None, extra=None):
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	157 """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	158
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	159 @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	160 @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	161 - None: use a temporary file
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	162 - Path: path to the file to create/overwrite
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	163 - 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	164 @param extra(None, dict): conversion options
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	165 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	166 - width: destination width
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	167 - height: destination height
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	168 @return (Path): path of the converted file.
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	169 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	170 """
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	171 image_path = Path(image_path)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	172 if not image_path.is_file():
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	173 raise ValueError(f"There is no file at {image_path}!")
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	174 if extra is None:
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	175 extra = {}
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	176 return threads.deferToThread(_convertBlocking, image_path, dest, extra)
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	177
f300d78f08f3 core: image convertion + SVG support: Goffi <goffi@goffi.org> parents: 3252 diff changeset	178
3252 54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	179 def guess_type(source):
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	180 """Guess image media type
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	181
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	182 @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	183 @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	184 """
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	185 if isinstance(source, str):
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	186 source = Path(source)
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	187
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	188 if isinstance(source, Path):
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	189 # 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	190 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	191 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	192 return media_type
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	193
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	194 # 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	195 img = Image.open(source)
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	196 try:
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	197 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	198 except KeyError:
54934ee3f69c tools (image): added a guess_type method to guess media type: Goffi <goffi@goffi.org> parents: 3220 diff changeset	199 return None

Mercurial > libervia-backend

annotate sat/tools/image.py @ 3310:e4121a1f2399