def generate_source_image(source_file, processor_options, generators=None):
"""
Processes a source ``File`` through a series of source generators, stopping
once a generator returns an image.
The return value is this image instance or ``None`` if no generators
return an image.
If the source file cannot be opened, it will be set to ``None`` and still
passed to the generators.
"""
was_closed = source_file.closed
if generators is None:
generators = [utils.dynamic_import(name)
for name in settings.THUMBNAIL_SOURCE_GENERATORS]
try:
source = source_file
try:
source.open()
except Exception:
source = None
was_closed = False
for generator in generators:
image = generator(source, **processor_options)
if image:
return image
finally:
if was_closed:
source_file.close()
def generate_source_image(source_file, processor_options, generators=None):
"""
Processes a source ``File`` through a series of source generators, stopping
once a generator returns an image.
The return value is this image instance or ``None`` if no generators
return an image.
If the source file cannot be opened, it will be set to ``None`` and still
passed to the generators.
"""
processor_options = _use_default_options(processor_options)
was_closed = source_file.closed
if generators is None:
generators = [
utils.dynamic_import(name)
for name in settings.THUMBNAIL_SOURCE_GENERATORS
]
try:
source = source_file
try:
source.open()
except Exception:
source = None
was_closed = False
for generator in generators:
image = generator(source, **processor_options)
if image:
return image
finally:
if was_closed:
source_file.close()
def generate_source_image(source_file,
processor_options,
generators=None,
fail_silently=True):
"""
Processes a source ``File`` through a series of source generators, stopping
once a generator returns an image.
The return value is this image instance or ``None`` if no generators
return an image.
If the source file cannot be opened, it will be set to ``None`` and still
passed to the generators.
"""
processor_options = ThumbnailOptions(processor_options)
# Keep record of whether the source file was originally closed. Not all
# file-like objects provide this attribute, so just fall back to False.
was_closed = getattr(source_file, 'closed', False)
if generators is None:
generators = [
utils.dynamic_import(name)
for name in settings.THUMBNAIL_SOURCE_GENERATORS
]
exceptions = []
try:
for generator in generators:
source = source_file
# First try to open the file.
try:
source.open()
except Exception:
# If that failed, maybe the file-like object doesn't support
# reopening so just try seeking back to the start of the file.
try:
source.seek(0)
except Exception:
source = None
try:
image = generator(source, **processor_options)
except Exception as e:
if not fail_silently:
if len(generators) == 1:
raise
exceptions.append(e)
image = None
if image:
return image
finally:
# Attempt to close the file if it was closed originally (but fail
# silently).
if was_closed:
try:
source_file.close()
except Exception:
pass
if exceptions and not fail_silently:
raise NoSourceGenerator(*exceptions)
def generate_source_image(source_file, processor_options, generators=None,
fail_silently=True):
"""
Processes a source ``File`` through a series of source generators, stopping
once a generator returns an image.
The return value is this image instance or ``None`` if no generators
return an image.
If the source file cannot be opened, it will be set to ``None`` and still
passed to the generators.
"""
processor_options = ThumbnailOptions(processor_options)
# Keep record of whether the source file was originally closed. Not all
# file-like objects provide this attribute, so just fall back to False.
was_closed = getattr(source_file, 'closed', False)
if generators is None:
generators = [
utils.dynamic_import(name)
for name in settings.THUMBNAIL_SOURCE_GENERATORS]
exceptions = []
try:
for generator in generators:
source = source_file
# First try to open the file.
try:
source.open()
except Exception:
# If that failed, maybe the file-like object doesn't support
# reopening so just try seeking back to the start of the file.
try:
source.seek(0)
except Exception:
source = None
try:
image = generator(source, **processor_options)
except Exception as e:
if not fail_silently:
if len(generators) == 1:
raise
exceptions.append(e)
image = None
if image:
return image
finally:
# Attempt to close the file if it was closed originally (but fail
# silently).
if was_closed:
try:
source_file.close()
except Exception:
pass
if exceptions and not fail_silently:
raise NoSourceGenerator(*exceptions)
def process_image(source, processor_options, processors=None):
"""
Process a source PIL image through a series of image processors, returning
the (potentially) altered image.
"""
if processors is None:
processors = [utils.dynamic_import(name)
for name in settings.THUMBNAIL_PROCESSORS]
image = source
for processor in processors:
image = processor(image, **processor_options)
return image
def process_image(source, processor_options, processors=None):
"""
Process a source PIL image through a series of image processors, returning
the (potentially) altered image.
"""
processor_options = ThumbnailOptions(processor_options)
if processors is None:
processors = [
utils.dynamic_import(name)
for name in settings.THUMBNAIL_PROCESSORS]
image = source
for processor in processors:
image = processor(image, **processor_options)
return image
def get_thumbnail_name(self,
thumbnail_options,
transparent=False,
high_resolution=False):
"""
Return a thumbnail filename for the given ``thumbnail_options``
dictionary and ``source_name`` (which defaults to the File's ``name``
if not provided).
"""
thumbnail_options = self.get_options(thumbnail_options)
path, source_filename = os.path.split(self.name)
source_extension = os.path.splitext(source_filename)[1][1:]
preserve_extensions = self.thumbnail_preserve_extensions
if preserve_extensions and (preserve_extensions is True
or source_extension.lower()
in preserve_extensions):
extension = source_extension
elif transparent:
extension = self.thumbnail_transparency_extension
else:
extension = self.thumbnail_extension
extension = extension or 'jpg'
prepared_opts = thumbnail_options.prepared_options()
opts_text = '_'.join(prepared_opts)
data = {'opts': opts_text}
basedir = self.thumbnail_basedir % data
subdir = self.thumbnail_subdir % data
if isinstance(self.thumbnail_namer, six.string_types):
namer_func = utils.dynamic_import(self.thumbnail_namer)
else:
namer_func = self.thumbnail_namer
filename = namer_func(
thumbnailer=self,
source_filename=source_filename,
thumbnail_extension=extension,
thumbnail_options=thumbnail_options,
prepared_options=prepared_opts,
)
if high_resolution:
filename = self.thumbnail_highres_infix.join(
os.path.splitext(filename))
filename = '%s%s' % (self.thumbnail_prefix, filename)
return os.path.join(basedir, path, subdir, filename)
def get_thumbnail_name(self, thumbnail_options, transparent=False,
high_resolution=False):
"""
Return a thumbnail filename for the given ``thumbnail_options``
dictionary and ``source_name`` (which defaults to the File's ``name``
if not provided).
"""
thumbnail_options = self.get_options(thumbnail_options)
path, source_filename = os.path.split(self.name)
source_extension = os.path.splitext(source_filename)[1][1:]
preserve_extensions = self.thumbnail_preserve_extensions
if preserve_extensions and (
preserve_extensions is True or
source_extension.lower() in preserve_extensions):
extension = source_extension
elif transparent:
extension = self.thumbnail_transparency_extension
else:
extension = self.thumbnail_extension
extension = extension or 'jpg'
prepared_opts = thumbnail_options.prepared_options()
opts_text = '_'.join(prepared_opts)
data = {'opts': opts_text}
basedir = self.thumbnail_basedir % data
subdir = self.thumbnail_subdir % data
if isinstance(self.thumbnail_namer, six.string_types):
namer_func = utils.dynamic_import(self.thumbnail_namer)
else:
namer_func = self.thumbnail_namer
filename = namer_func(
thumbnailer=self,
source_filename=source_filename,
thumbnail_extension=extension,
thumbnail_options=thumbnail_options,
prepared_options=prepared_opts,
)
if high_resolution:
filename = self.thumbnail_highres_infix.join(
os.path.splitext(filename))
filename = '%s%s' % (self.thumbnail_prefix, filename)
return os.path.join(basedir, path, subdir, filename)
try:
from PIL import Image
except ImportError:
import Image
from easy_thumbnails import utils
import os
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
DEFAULT_PROCESSORS = [utils.dynamic_import(p)
for p in utils.get_setting('PROCESSORS')]
SOURCE_GENERATORS = [utils.dynamic_import(p)
for p in utils.get_setting('SOURCE_GENERATORS')]
def process_image(source, processor_options, processors=None):
"""
Process a source PIL image through a series of image processors, returning
the (potentially) altered image.
"""
if processors is None:
processors = DEFAULT_PROCESSORS
image = source
for processor in processors:
image = processor(image, **processor_options)
return image
try:
from PIL import Image
except ImportError:
import Image
from easy_thumbnails import utils
import os
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
DEFAULT_PROCESSORS = [
utils.dynamic_import(p) for p in utils.get_setting('PROCESSORS')
]
SOURCE_GENERATORS = [
utils.dynamic_import(p) for p in utils.get_setting('SOURCE_GENERATORS')
]
def process_image(source, processor_options, processors=None):
"""
Process a source PIL image through a series of image processors, returning
the (potentially) altered image.
"""
if processors is None:
processors = DEFAULT_PROCESSORS
image = source
for processor in processors:
image = processor(image, **processor_options)
try:
from PIL import Image
except ImportError:
import Image
from easy_thumbnails import utils
import os
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
DEFAULT_PROCESSORS = [
utils.dynamic_import(p) for p in utils.get_setting('PROCESSORS')
]
def process_image(source, processor_options, processors=None):
"""
Process a source PIL image through a series of image processors, returning
the (potentially) altered image.
"""
if processors is None:
processors = DEFAULT_PROCESSORS
image = source
for processor in processors:
image = processor(image, **processor_options)
return image
def save_image(image, destination=None, filename=None, **options):
try:
from PIL import Image
except ImportError:
import Image
from easy_thumbnails import utils
import os
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
DEFAULT_PROCESSORS = [utils.dynamic_import(p)
for p in utils.get_setting('PROCESSORS')]
def process_image(source, processor_options, processors=None):
"""
Process a source PIL image through a series of image processors, returning
the (potentially) altered image.
"""
if processors is None:
processors = DEFAULT_PROCESSORS
image = source
for processor in processors:
image = processor(image, **processor_options)
return image
def save_image(image, destination=None, filename=None, **options):
try:
from PIL import Image
except ImportError:
import Image
from easy_thumbnails import utils
import os
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
DEFAULT_PROCESSORS = [utils.dynamic_import(p) for p in utils.get_setting("PROCESSORS")]
SOURCE_GENERATORS = [utils.dynamic_import(p) for p in utils.get_setting("SOURCE_GENERATORS")]
def process_image(source, processor_options, processors=None):
"""
Process a source PIL image through a series of image processors, returning
the (potentially) altered image.
"""
if processors is None:
processors = DEFAULT_PROCESSORS
image = source
for processor in processors:
image = processor(image, **processor_options)
return image
