def rescale(self, cropped_image, size, force_crop=False): """ Resizes and saves the image to other sizes of the same aspect ratio from a given cropped image """ if force_crop or not size.create_on_request: auto_crop = (size.auto_size == AUTO_CROP) thumbnail = utils.rescale(cropped_image, size.width, size.height, auto_crop=auto_crop) # In case the thumbnail path hasn't been created yet if not os.path.exists(self.folder_path): try: os.makedirs(self.folder_path) except OSError: # Handles weird race conditions if the path wasn't created just yet if os.path.exists(self.folder_path): pass else: os.makedirs(self.folder_path) thumbnail.save(self.thumbnail_path(size.slug), **IMAGE_SAVE_PARAMS) # Create retina image if size.retina: retina_size = size.retina_size # Only create retina image if cropped image is large enough # If retina size is required, make a separate size if retina_size.width <= cropped_image.size[0] and retina_size.height <= cropped_image.size[1]: retina_thumbnail = utils.rescale(cropped_image, retina_size.width, retina_size.height, crop=retina_size.auto_size) retina_thumbnail.save(self.thumbnail_path(retina_size.slug), **IMAGE_SAVE_PARAMS)
def resize_image(self, image, sizes, force):
"""
Resizes an image to the provided set sizes.
@param image: Opened original image
@type image: PIL.Image
@param sizes: Set of sizes to create.
@type sizes: [Size1, ...]
@param force: Whether or not to recreate a thumbnail if it already exists.
@type force: bool
@return:
@rtype:
"""
img_params = (self.IMG_TYPE_PARAMS.get(image.format) or {}).copy()
for size in sizes:
logging.debug('Converting image to size `%s` (%s x %s)' % (size.name,
size.width,
size.height))
# Do we need to recreate the file?
if not force and os.path.isfile(size.path) and os.stat(size.path).st_size > 0:
logging.debug(' - Image `%s` exists, skipping...' % size.name)
continue
folder, _basename = os.path.split(size.path)
if not os.path.isdir(folder):
logging.debug(' - Directory %s does not exist. Creating...' % folder)
os.makedirs(folder)
try:
# In place scaling, so we need to use a copy of the image.
thumbnail = rescale(image.copy(),
size.width,
size.height,
crop=size.crop)
tmp_path = size.path + '.tmp'
thumbnail.save(tmp_path, image.format, **img_params)
# No idea what this can throw, so catch them all
except Exception, e:
logging.exception('Error saving thumbnail to %s' % tmp_path)
raise SystemExit('Exiting...')
else:
os.rename(tmp_path, size.path)
def resize_image(self, image, sizes, force):
"""
Resizes an image to the provided set sizes.
@param image: Opened original image
@type image: PIL.Image
@param sizes: Set of sizes to create.
@type sizes: [Size1, ...]
@param force: Whether or not to recreate a thumbnail if it already exists.
@type force: bool
@return:
@rtype:
"""
img_params = (self.IMG_TYPE_PARAMS.get(image.format) or {}).copy()
for size in sizes:
logging.debug('Converting image to size `%s` (%s x %s)' % (size.name,
size.width,
size.height))
# Do we need to recreate the file?
if not force and os.path.isfile(size.path) and os.stat(size.path).st_size > 0:
logging.debug(' - Image `%s` exists, skipping...' % size.name)
continue
folder, _basename = os.path.split(size.path)
if not os.path.isdir(folder):
logging.debug(' - Directory %s does not exist. Creating...' % folder)
os.makedirs(folder)
try:
# In place scaling, so we need to use a copy of the image.
thumbnail = rescale(image.copy(),
size.width,
size.height,
crop=size.crop)
tmp_path = size.path + '.tmp'
thumbnail.save(tmp_path, image.format, **img_params)
# No idea what this can throw, so catch them all
except Exception, e:
logging.exception('Error saving thumbnail to %s' % tmp_path)
raise SystemExit('Exiting...')
else:
os.rename(tmp_path, size.path)
def save(self, *args, **kwargs): super(Image, self).save(*args, **kwargs) for size in self.size_set.size_set.all().filter(auto_size=1): if self.image.width > size.width and self.image.height > size.height: thumbnail = utils.rescale(pil.open(self.image.path), size.width, size.height, crop=True) if not os.path.exists(self.folder_path): os.makedirs(self.folder_path) thumbnail.save(self.thumbnail_path(size), **IMAGE_SAVE_PARAMS) else: thumbnail = pil.open(self.image.path) if not os.path.exists(self.folder_path): os.makedirs(self.folder_path) thumbnail.save(self.thumbnail_path(size), **IMAGE_SAVE_PARAMS)
def save(self, *args, **kwargs):
super(Crop, self).save(*args, **kwargs)
if self.size:
sizes = Size.objects.all().filter(aspect_ratio=self.size.aspect_ratio, size_set=self.size.size_set).exclude(auto_size=1).order_by("-width")
if sizes:
cropped_image = utils.create_cropped_image(self.image.image.path, self.crop_x, self.crop_y, self.crop_w, self.crop_h)
for size in sizes:
thumbnail = utils.rescale(cropped_image, size.width, size.height, crop=size.auto_size)
if not os.path.exists(self.image.folder_path):
os.makedirs(self.image.folder_path)
thumbnail.save(self.image.thumbnail_path(size), **IMAGE_SAVE_PARAMS)