def _resize(self, quality, width, height, format, resolution, frame, crop=False):
"""Resize and resample photo."""
parameter_list = ['convert', '-colorspace', 'sRGB', '-depth', '8']
if crop :
parameter_list += '-thumbnail', '%sx%s^' % (width, height),\
'-gravity', 'center',\
'-extent','%sx%s' % (width, height)
else:
parameter_list += '-geometry', '%sx%s' % (width, height)
parameter_list += '-quality', str(quality)
if format not in VALID_TRANSPARENT_IMAGE_FORMAT_LIST:
# ImageMagick way to remove transparent that works with multiple
# images. http://www.imagemagick.org/Usage/masking/#remove
parameter_list += '-bordercolor', 'white', '-border', '0'
if resolution:
parameter_list += '-density', '%sx%s' % (resolution, resolution)
if frame is not None:
parameter_list.append('-[%s]' % frame)
else:
parameter_list.append('-')
if format:
# Is there a way to make 'convert' fail if the format is unknown,
# instead of treating this whole parameter as an output file path?
# As a workaround, we run 'convert' in a non-writeable directory.
if '/' in format or os.access('/', os.W_OK):
raise ConversionError
parameter_list.append('%s:-' % format)
else:
parameter_list.append('-')
data = str(self.getData())
if self.getContentType() == "image/svg+xml":
data = transformUrlToDataURI(data)
env = os.environ.copy()
env.update({'LC_NUMERIC':'C'})
process = subprocess.Popen(parameter_list,
env=env,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd='/',
close_fds=True)
try:
# XXX: The only portable way is to pass what stdin.write can accept,
# which is a string for PIPE.
image, err = process.communicate(data)
finally:
del process
if image:
return StringIO(image)
raise ConversionError('Image conversion failed (%s).' % err)
def _resize(self, quality, width, height, format, resolution, frame):
"""Resize and resample photo."""
parameter_list = [
'convert', '-colorspace', 'sRGB', '-depth', '8', '-quality',
str(quality), '-geometry',
'%sx%s' % (width, height)
]
if format not in VALID_TRANSPARENT_IMAGE_FORMAT_LIST:
# ImageMagick way to remove transparent that works with multiple
# images. http://www.imagemagick.org/Usage/masking/#remove
parameter_list += '-bordercolor', 'white', '-border', '0'
if resolution:
parameter_list += '-density', '%sx%s' % (resolution, resolution)
if frame is not None:
parameter_list.append('-[%s]' % frame)
else:
parameter_list.append('-')
if format:
# Is there a way to make 'convert' fail if the format is unknown,
# instead of treating this whole parameter as an output file path?
# As a workaround, we run 'convert' in a non-writeable directory.
if '/' in format or os.access('/', os.W_OK):
raise ConversionError
parameter_list.append('%s:-' % format)
else:
parameter_list.append('-')
data = str(self.getData())
if self.getContentType() == "image/svg+xml":
data = transformUrlToDataURI(data)
env = os.environ.copy()
env.update({'LC_NUMERIC': 'C'})
process = subprocess.Popen(parameter_list,
env=env,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd='/',
close_fds=True)
try:
# XXX: The only portable way is to pass what stdin.write can accept,
# which is a string for PIPE.
image, err = process.communicate(data)
finally:
del process
if image:
return StringIO(image)
raise ConversionError('Image conversion failed (%s).' % err)
def _resize(self, quality, width, height, format, resolution, frame):
"""Resize and resample photo."""
parameter_list = ['convert', '-colorspace', 'sRGB', '-depth', '8',
'-quality', str(quality),
'-geometry', '%sx%s' % (width, height)]
if format not in VALID_TRANSPARENT_IMAGE_FORMAT_LIST:
# ImageMagick way to remove transparent that works with multiple
# images. http://www.imagemagick.org/Usage/masking/#remove
parameter_list += '-bordercolor', 'white', '-border', '0'
if resolution:
parameter_list += '-density', '%sx%s' % (resolution, resolution)
if frame is not None:
parameter_list.append('-[%s]' % frame)
else:
parameter_list.append('-')
if format:
parameter_list.append('%s:-' % format)
else:
parameter_list.append('-')
data = str(self.getData())
if self.getContentType() == "image/svg+xml":
data = transformUrlToDataURI(data)
env = os.environ.copy()
env.update({'LC_NUMERIC':'C'})
process = subprocess.Popen(parameter_list,
env=env,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
close_fds=True)
try:
# XXX: The only portable way is to pass what stdin.write can accept,
# which is a string for PIPE.
image, err = process.communicate(data)
finally:
del process
if image:
return StringIO(image)
raise ConversionError('Image conversion failed (%s).' % err)
def _resize(self, quality, width, height, format, resolution, frame):
"""Resize and resample photo."""
parameter_list = [
'convert', '-colorspace', 'sRGB', '-depth', '8', '-quality',
str(quality), '-geometry',
'%sx%s' % (width, height)
]
if format not in VALID_TRANSPARENT_IMAGE_FORMAT_LIST:
# ImageMagick way to remove transparent that works with multiple
# images. http://www.imagemagick.org/Usage/masking/#remove
parameter_list += '-bordercolor', 'white', '-border', '0'
if resolution:
parameter_list += '-density', '%sx%s' % (resolution, resolution)
if frame is not None:
parameter_list.append('-[%s]' % frame)
else:
parameter_list.append('-')
if format:
parameter_list.append('%s:-' % format)
else:
parameter_list.append('-')
data = str(self.getData())
if self.getContentType() == "image/svg+xml":
data = transformUrlToDataURI(data)
process = subprocess.Popen(parameter_list,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
close_fds=True)
try:
# XXX: The only portable way is to pass what stdin.write can accept,
# which is a string for PIPE.
image, err = process.communicate(data)
finally:
del process
if image:
return StringIO(image)
raise ConversionError('Image conversion failed (%s).' % err)
