Spaces:
Sleeping
Sleeping
File size: 8,685 Bytes
2fe55e2 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 |
# Copy from https://github.com/silentsokolov/flask-thumbnails/blob/master/flask_thumbnails/thumbnail.py
import os
from datetime import datetime
import cv2
import time
from io import BytesIO
from pathlib import Path
import numpy as np
# from watchdog.events import FileSystemEventHandler
# from watchdog.observers import Observer
from PIL import Image, ImageOps, PngImagePlugin
from loguru import logger
LARGE_ENOUGH_NUMBER = 100
PngImagePlugin.MAX_TEXT_CHUNK = LARGE_ENOUGH_NUMBER * (1024**2)
from .storage_backends import FilesystemStorageBackend
from .utils import aspect_to_string, generate_filename, glob_img
class FileManager:
def __init__(self, app=None):
self.app = app
self._default_root_directory = "media"
self._default_thumbnail_directory = "media"
self._default_root_url = "/"
self._default_thumbnail_root_url = "/"
self._default_format = "JPEG"
self.output_dir: Path = None
if app is not None:
self.init_app(app)
self.image_dir_filenames = []
self.output_dir_filenames = []
self.image_dir_observer = None
self.output_dir_observer = None
self.modified_time = {
"image": datetime.utcnow(),
"output": datetime.utcnow(),
}
# def start(self):
# self.image_dir_filenames = self._media_names(self.root_directory)
# self.output_dir_filenames = self._media_names(self.output_dir)
#
# logger.info(f"Start watching image directory: {self.root_directory}")
# self.image_dir_observer = Observer()
# self.image_dir_observer.schedule(self, self.root_directory, recursive=False)
# self.image_dir_observer.start()
#
# logger.info(f"Start watching output directory: {self.output_dir}")
# self.output_dir_observer = Observer()
# self.output_dir_observer.schedule(self, self.output_dir, recursive=False)
# self.output_dir_observer.start()
def on_modified(self, event):
if not os.path.isdir(event.src_path):
return
if event.src_path == str(self.root_directory):
logger.info(f"Image directory {event.src_path} modified")
self.image_dir_filenames = self._media_names(self.root_directory)
self.modified_time["image"] = datetime.utcnow()
elif event.src_path == str(self.output_dir):
logger.info(f"Output directory {event.src_path} modified")
self.output_dir_filenames = self._media_names(self.output_dir)
self.modified_time["output"] = datetime.utcnow()
def init_app(self, app):
if self.app is None:
self.app = app
app.thumbnail_instance = self
if not hasattr(app, "extensions"):
app.extensions = {}
if "thumbnail" in app.extensions:
raise RuntimeError("Flask-thumbnail extension already initialized")
app.extensions["thumbnail"] = self
app.config.setdefault("THUMBNAIL_MEDIA_ROOT", self._default_root_directory)
app.config.setdefault(
"THUMBNAIL_MEDIA_THUMBNAIL_ROOT", self._default_thumbnail_directory
)
app.config.setdefault("THUMBNAIL_MEDIA_URL", self._default_root_url)
app.config.setdefault(
"THUMBNAIL_MEDIA_THUMBNAIL_URL", self._default_thumbnail_root_url
)
app.config.setdefault("THUMBNAIL_DEFAULT_FORMAT", self._default_format)
@property
def root_directory(self):
path = self.app.config["THUMBNAIL_MEDIA_ROOT"]
if os.path.isabs(path):
return path
else:
return os.path.join(self.app.root_path, path)
@property
def thumbnail_directory(self):
path = self.app.config["THUMBNAIL_MEDIA_THUMBNAIL_ROOT"]
if os.path.isabs(path):
return path
else:
return os.path.join(self.app.root_path, path)
@property
def root_url(self):
return self.app.config["THUMBNAIL_MEDIA_URL"]
@property
def media_names(self):
# return self.image_dir_filenames
return self._media_names(self.root_directory)
@property
def output_media_names(self):
return self._media_names(self.output_dir)
# return self.output_dir_filenames
@staticmethod
def _media_names(directory: Path):
names = sorted([it.name for it in glob_img(directory)])
res = []
for name in names:
path = os.path.join(directory, name)
img = Image.open(path)
res.append(
{
"name": name,
"height": img.height,
"width": img.width,
"ctime": os.path.getctime(path),
"mtime": os.path.getmtime(path),
}
)
return res
@property
def thumbnail_url(self):
return self.app.config["THUMBNAIL_MEDIA_THUMBNAIL_URL"]
def get_thumbnail(
self, directory: Path, original_filename: str, width, height, **options
):
storage = FilesystemStorageBackend(self.app)
crop = options.get("crop", "fit")
background = options.get("background")
quality = options.get("quality", 90)
original_path, original_filename = os.path.split(original_filename)
original_filepath = os.path.join(directory, original_path, original_filename)
image = Image.open(BytesIO(storage.read(original_filepath)))
# keep ratio resize
if width is not None:
height = int(image.height * width / image.width)
else:
width = int(image.width * height / image.height)
thumbnail_size = (width, height)
thumbnail_filename = generate_filename(
original_filename,
aspect_to_string(thumbnail_size),
crop,
background,
quality,
)
thumbnail_filepath = os.path.join(
self.thumbnail_directory, original_path, thumbnail_filename
)
thumbnail_url = os.path.join(
self.thumbnail_url, original_path, thumbnail_filename
)
if storage.exists(thumbnail_filepath):
return thumbnail_url, (width, height)
try:
image.load()
except (IOError, OSError):
self.app.logger.warning("Thumbnail not load image: %s", original_filepath)
return thumbnail_url, (width, height)
# get original image format
options["format"] = options.get("format", image.format)
image = self._create_thumbnail(
image, thumbnail_size, crop, background=background
)
raw_data = self.get_raw_data(image, **options)
storage.save(thumbnail_filepath, raw_data)
return thumbnail_url, (width, height)
def get_raw_data(self, image, **options):
data = {
"format": self._get_format(image, **options),
"quality": options.get("quality", 90),
}
_file = BytesIO()
image.save(_file, **data)
return _file.getvalue()
@staticmethod
def colormode(image, colormode="RGB"):
if colormode == "RGB" or colormode == "RGBA":
if image.mode == "RGBA":
return image
if image.mode == "LA":
return image.convert("RGBA")
return image.convert(colormode)
if colormode == "GRAY":
return image.convert("L")
return image.convert(colormode)
@staticmethod
def background(original_image, color=0xFF):
size = (max(original_image.size),) * 2
image = Image.new("L", size, color)
image.paste(
original_image,
tuple(map(lambda x: (x[0] - x[1]) / 2, zip(size, original_image.size))),
)
return image
def _get_format(self, image, **options):
if options.get("format"):
return options.get("format")
if image.format:
return image.format
return self.app.config["THUMBNAIL_DEFAULT_FORMAT"]
def _create_thumbnail(self, image, size, crop="fit", background=None):
try:
resample = Image.Resampling.LANCZOS
except AttributeError: # pylint: disable=raise-missing-from
resample = Image.ANTIALIAS
if crop == "fit":
image = ImageOps.fit(image, size, resample)
else:
image = image.copy()
image.thumbnail(size, resample=resample)
if background is not None:
image = self.background(image)
image = self.colormode(image)
return image
|