def generate_thumbnail(self, thumbnail_options):
"""
Return a ``ThumbnailFile`` containing a thumbnail image.
The thumbnail image is generated using the ``thumbnail_options``
dictionary.
"""
if not utils.is_storage_local(self.source_storage):
# Get a local copy of the source file
tmp_image_f = StringIO()
orig_f = urllib2.urlopen(self.source_storage.url(self.name))
tmp_image_f.write(orig_f.read())
tmp_image_f.seek(0)
self.file = tmp_image_f
image = engine.generate_source_image(self, thumbnail_options)
thumbnail_image = engine.process_image(image, thumbnail_options)
quality = thumbnail_options.get('quality', self.thumbnail_quality)
filename = self.get_thumbnail_name(thumbnail_options,
transparent=self.is_transparent(thumbnail_image))
data = engine.save_image(thumbnail_image, filename=filename,
quality=quality).read()
thumbnail = ThumbnailFile(filename, ContentFile(data),
storage=self.thumbnail_storage)
thumbnail.image = thumbnail_image
thumbnail._committed = False
return thumbnail
def generate_thumbnail(self, thumbnail_options):
"""
Return an unsaved ``ThumbnailFile`` containing a thumbnail image.
The thumbnail image is generated using the ``thumbnail_options``
dictionary.
"""
image = engine.generate_source_image(self, thumbnail_options,
self.source_generators)
thumbnail_image = engine.process_image(image, thumbnail_options,
self.thumbnail_processors)
quality = thumbnail_options.get('quality', self.thumbnail_quality)
filename = self.get_thumbnail_name(thumbnail_options,
transparent=self.is_transparent(thumbnail_image))
data = engine.save_image(thumbnail_image, filename=filename,
quality=quality).read()
thumbnail = ThumbnailFile(filename, ContentFile(data),
storage=self.thumbnail_storage)
thumbnail.image = thumbnail_image
thumbnail._committed = False
return thumbnail
def generate_thumbnail(self, thumbnail_options):
"""
Return a ``ThumbnailFile`` containing a thumbnail image.
The thumbnail image is generated using the ``thumbnail_options``
dictionary.
"""
image = engine.generate_source_image(self, thumbnail_options)
if image is None:
raise exceptions.InvalidImageFormatError(
"Image file format is not supported!")
thumbnail_image = engine.process_image(image, thumbnail_options)
quality = thumbnail_options.get('quality', self.thumbnail_quality)
filename = self.get_thumbnail_name(thumbnail_options,
transparent=self.is_transparent(thumbnail_image))
data = engine.save_image(thumbnail_image, filename=filename,
quality=quality).read()
thumbnail = ThumbnailFile(filename, ContentFile(data),
storage=self.thumbnail_storage)
thumbnail.image = thumbnail_image
thumbnail._committed = False
return thumbnail
def generate_thumbnail(self, thumbnail_options, high_resolution=False,
silent_template_exception=False):
"""
Return an unsaved ``ThumbnailFile`` containing a thumbnail image.
The thumbnail image is generated using the ``thumbnail_options``
dictionary.
"""
thumbnail_options = self.get_options(thumbnail_options)
orig_size = thumbnail_options['size'] # remember original size
# Size sanity check.
min_dim, max_dim = 0, 0
for dim in orig_size:
try:
dim = int(dim)
except (TypeError, ValueError):
continue
min_dim, max_dim = min(min_dim, dim), max(max_dim, dim)
if max_dim == 0 or min_dim < 0:
raise exceptions.EasyThumbnailsError(
"The source image is an invalid size (%sx%s)" % orig_size)
if high_resolution:
thumbnail_options['size'] = (orig_size[0] * 2, orig_size[1] * 2)
image = engine.generate_source_image(
self, thumbnail_options, self.source_generators,
fail_silently=silent_template_exception)
if image is None:
raise exceptions.InvalidImageFormatError(
"The source file does not appear to be an image")
icc_profile = image.info.get("icc_profile")
thumbnail_image = engine.process_image(image, thumbnail_options,
self.thumbnail_processors)
if high_resolution:
thumbnail_options['size'] = orig_size # restore original size
filename = self.get_thumbnail_name(
thumbnail_options,
transparent=utils.is_transparent(thumbnail_image),
high_resolution=high_resolution)
quality = thumbnail_options['quality']
subsampling = thumbnail_options['subsampling']
img = engine.save_image(
thumbnail_image, filename=filename, quality=quality,
subsampling=subsampling, icc_profile=icc_profile)
data = img.read()
thumbnail = ThumbnailFile(
filename, file=ContentFile(data), storage=self.thumbnail_storage,
thumbnail_options=thumbnail_options)
thumbnail.image = thumbnail_image
thumbnail._committed = False
return thumbnail
def generate_thumbnail(self, thumbnail_options, high_resolution=False,
silent_template_exception=False):
"""
Return an unsaved ``ThumbnailFile`` containing a thumbnail image.
The thumbnail image is generated using the ``thumbnail_options``
dictionary.
"""
if high_resolution:
orig_size = thumbnail_options['size'] # remember original size
thumbnail_options = thumbnail_options.copy()
thumbnail_options['size'] = (orig_size[0] * 2, orig_size[1] * 2)
image = engine.generate_source_image(
self, thumbnail_options, self.source_generators,
fail_silently=silent_template_exception)
if image is None:
raise exceptions.InvalidImageFormatError(
"The source file does not appear to be an image")
thumbnail_image = engine.process_image(image, thumbnail_options,
self.thumbnail_processors)
quality = thumbnail_options.get('quality', self.thumbnail_quality)
if high_resolution:
thumbnail_options['size'] = orig_size # restore original size
filename = self.get_thumbnail_name(
thumbnail_options,
transparent=utils.is_transparent(thumbnail_image),
high_resolution=high_resolution)
img = engine.save_image(
thumbnail_image, filename=filename, quality=quality)
data = img.read()
thumbnail = ThumbnailFile(
filename, file=ContentFile(data), storage=self.thumbnail_storage,
thumbnail_options=thumbnail_options)
thumbnail.image = thumbnail_image
thumbnail._committed = False
return thumbnail
def generate_source_image(self, thumbnail_options):
return engine.generate_source_image(self, thumbnail_options,
self.source_generators)
def test_multiple_silent_fail(self):
source_generators = [
FakeSourceGenerator(fail=True), FakeSourceGenerator(fail=True)]
image = engine.generate_source_image(
self.source, {}, source_generators)
self.assertEqual(image, None)
def generate_source_image(self, thumbnail_options):
return engine.generate_source_image(self, thumbnail_options,
self.source_generators)
def generate_thumbnail(self,
thumbnail_options,
high_resolution=False,
silent_template_exception=False):
"""
Return an unsaved ``ThumbnailFile`` containing a thumbnail image.
The thumbnail image is generated using the ``thumbnail_options``
dictionary.
"""
thumbnail_options = self.get_options(thumbnail_options)
orig_size = thumbnail_options['size'] # remember original size
# Size sanity check.
min_dim, max_dim = 0, 0
for dim in orig_size:
try:
dim = int(dim)
except (TypeError, ValueError):
continue
min_dim, max_dim = min(min_dim, dim), max(max_dim, dim)
if max_dim == 0 or min_dim < 0:
raise exceptions.EasyThumbnailsError(
"The source image is an invalid size (%sx%s)" % orig_size)
if high_resolution:
thumbnail_options['size'] = (orig_size[0] * 2, orig_size[1] * 2)
image = engine.generate_source_image(
self,
thumbnail_options,
self.source_generators,
fail_silently=silent_template_exception)
if image is None:
raise exceptions.InvalidImageFormatError(
"The source file does not appear to be an image")
thumbnail_image = engine.process_image(image, thumbnail_options,
self.thumbnail_processors)
if high_resolution:
thumbnail_options['size'] = orig_size # restore original size
filename = self.get_thumbnail_name(
thumbnail_options,
transparent=utils.is_transparent(thumbnail_image),
high_resolution=high_resolution)
quality = thumbnail_options['quality']
subsampling = thumbnail_options['subsampling']
img = engine.save_image(thumbnail_image,
filename=filename,
quality=quality,
subsampling=subsampling)
data = img.read()
thumbnail = ThumbnailFile(filename,
file=ContentFile(data),
storage=self.thumbnail_storage,
thumbnail_options=thumbnail_options)
thumbnail.image = thumbnail_image
thumbnail._committed = False
return thumbnail
def test_single_silent_fail(self):
source_generators = [FakeSourceGenerator(fail=True)]
image = engine.generate_source_image(self.source, {},
source_generators)
self.assertEqual(image, None)
def generate_thumbnail(self, thumbnail_options, high_resolution=False,
silent_template_exception=False):
"""
Return an unsaved ``ThumbnailFile`` containing a thumbnail image.
The thumbnail image is generated using the ``thumbnail_options``
dictionary.
"""
thumbnail_options = self.get_options(thumbnail_options)
orig_size = thumbnail_options['size'] # remember original size
# Size sanity check.
min_dim, max_dim = 0, 0
for dim in orig_size:
try:
dim = int(dim)
except (TypeError, ValueError):
continue
min_dim, max_dim = min(min_dim, dim), max(max_dim, dim)
if max_dim == 0 or min_dim < 0:
raise exceptions.EasyThumbnailsError(
"The source image is an invalid size (%sx%s)" % orig_size)
if high_resolution:
thumbnail_options['size'] = (orig_size[0] * 2, orig_size[1] * 2)
image = engine.generate_source_image(
self, thumbnail_options, self.source_generators,
fail_silently=silent_template_exception)
if image is None:
raise exceptions.InvalidImageFormatError(
"The source file does not appear to be an image")
thumbnail_image = None
IS_GIF = False
if isinstance(image, GifImageFile):
IS_GIF = True
import images2gif
gif_image, gif_params = images2gif.readGif(image, False)
frames = []
for frame in gif_image:
thumbnail_frame = engine.process_image(frame, thumbnail_options,
self.thumbnail_processors)
frames.append(thumbnail_frame)
if thumbnail_image is None:
thumbnail_image = frame
else:
thumbnail_image = engine.process_image(image, thumbnail_options,
self.thumbnail_processors)
if high_resolution:
thumbnail_options['size'] = orig_size # restore original size
filename = self.get_thumbnail_name(
thumbnail_options,
transparent=utils.is_transparent(thumbnail_image),
high_resolution=high_resolution)
quality = thumbnail_options['quality']
subsampling = thumbnail_options['subsampling']
if IS_GIF:
try:
# try save with speedup
img = images2gif.writeGif(frames, **gif_params)
saved = True
except:
# if not saved, simple save
gif_params.update({'subRectangles': False,})
img = images2gif.writeGif(frames, **gif_params)
else:
img = engine.save_image(
thumbnail_image, filename=filename, quality=quality,
subsampling=subsampling)
data = img.read()
thumbnail = ThumbnailFile(
filename, file=ContentFile(data), storage=self.thumbnail_storage,
thumbnail_options=thumbnail_options)
thumbnail.image = thumbnail_image
thumbnail._committed = False
return thumbnail
def generate_thumbnail(self, thumbnail_options, high_resolution=False,
silent_template_exception=False):
"""
Return an unsaved ``ThumbnailFile`` containing a thumbnail image.
The thumbnail image is generated using the ``thumbnail_options``
dictionary.
"""
thumbnail_options = self.get_options(thumbnail_options)
orig_size = thumbnail_options['size'] # remember original size
# Size sanity check.
min_dim, max_dim = 0, 0
for dim in orig_size:
try:
dim = int(dim)
except (TypeError, ValueError):
continue
min_dim, max_dim = min(min_dim, dim), max(max_dim, dim)
if max_dim == 0 or min_dim < 0:
raise exceptions.EasyThumbnailsError(
"The source image is an invalid size (%sx%s)" % orig_size)
if high_resolution:
thumbnail_options['size'] = (orig_size[0] * 2, orig_size[1] * 2)
image = engine.generate_source_image(
self, thumbnail_options, self.source_generators,
fail_silently=silent_template_exception)
if image is None:
raise exceptions.InvalidImageFormatError(
"The source file does not appear to be an image")
self.open()
source_image = Image.open(self.file)
is_animated_gif = self.name.lower().endswith('.gif') \
and source_image.format == 'GIF' \
and source_image.info.get('duration') != None
from io import BytesIO
if is_animated_gif:
frame_index = 0
palette = source_image.getpalette()
from easy_thumbnails.utils import images2gif
images = images2gif.readGif(self.file, asNumpy=False)
# convert the durations to 0.1 secs
durations = [single_duration / 1000.0 for single_duration in images2gif.getDurationsOfGif(self.file)]
else:
images = [engine.generate_source_image(
self, thumbnail_options, self.source_generators,
fail_silently=silent_template_exception)]
thumbnail_images = []
if high_resolution:
thumbnail_options['high_resolution'] = True
for image in images:
if image is None:
raise exceptions.InvalidImageFormatError(
"The source file does not appear to be an image")
thumb = engine.process_image(image, thumbnail_options, self.thumbnail_processors)
thumbnail_images.append(thumb)
thumbnail_image = thumbnail_images[0]
quality = thumbnail_options.get('quality', self.thumbnail_quality)
if high_resolution:
thumbnail_options['size'] = orig_size # restore original size
del thumbnail_options['high_resolution']
filename = self.get_thumbnail_name(
thumbnail_options,
transparent=utils.is_transparent(thumbnail_image),
high_resolution=high_resolution)
quality = thumbnail_options['quality']
subsampling = thumbnail_options['subsampling']
if is_animated_gif:
from tempfile import NamedTemporaryFile
try:
output_temp_file = NamedTemporaryFile('rw', suffix='.gif')
images2gif.writeGif(output_temp_file.name, thumbnail_images, duration=durations)
output_temp_file = open(output_temp_file.name)
data = output_temp_file.read()
finally:
output_temp_file.close()
del output_temp_file
else:
img = engine.save_image(
thumbnail_image, filename=filename, quality=quality)
data = img.read()
thumbnail = ThumbnailFile(
filename, file=ContentFile(data), storage=self.thumbnail_storage,
thumbnail_options=thumbnail_options)
thumbnail._committed = False
return thumbnail