def _get_band_images(channel_data, channel_ids, color_mode, size, depth):
bands = {}
for channel, channel_id in zip(channel_data, channel_ids):
pil_band = _channel_id_to_PIL(channel_id, color_mode)
if pil_band is None:
warnings.warn("Unsupported channel type (%d)" % channel_id)
continue
if channel.compression in [Compression.RAW, Compression.ZIP, Compression.ZIP_WITH_PREDICTION]:
if depth == 8:
im = _from_8bit_raw(channel.data, size)
elif depth == 16:
im = _from_16bit_raw(channel.data, size)
elif depth == 32:
im = _from_32bit_raw(channel.data, size)
else:
warnings.warn("Unsupported depth (%s)" % depth)
continue
elif channel.compression == Compression.PACK_BITS:
if depth != 8:
warnings.warn("Depth %s is unsupported for PackBits compression" % depth)
continue
im = frombytes('L', size, channel.data, "packbits", 'L')
else:
if Compression.is_known(channel.compression):
warnings.warn("Compression method is not implemented (%s)" % channel.compression)
else:
warnings.warn("Unknown compression method (%s)" % channel.compression)
continue
bands[pil_band] = im.convert('L')
return bands
def _decompress_channel(channel, depth, size):
if channel.compression in (Compression.RAW, Compression.ZIP,
Compression.ZIP_WITH_PREDICTION):
if depth == 8:
im = _from_8bit_raw(channel.data, size)
elif depth == 16:
im = _from_16bit_raw(channel.data, size)
elif depth == 32:
im = _from_32bit_raw(channel.data, size)
else:
warnings.warn("Unsupported depth (%s)" % depth)
return None
elif channel.compression == Compression.PACK_BITS:
if depth != 8:
warnings.warn("Depth %s is unsupported for PackBits compression" %
depth)
im = frombytes('L', size, channel.data, "packbits", 'L')
else:
if Compression.is_known(channel.compression):
warnings.warn("Compression method is not implemented "
"(%s)" % channel.compression)
else:
warnings.warn("Unknown compression method (%s)" %
channel.compression)
return None
return im.convert('L')
def _get_band_images(channel_data, channel_ids, color_mode, size, depth):
bands = {}
for channel, channel_id in zip(channel_data, channel_ids):
pil_band = _channel_id_to_PIL(channel_id, color_mode)
if pil_band is None:
warnings.warn("Unsupported channel type (%d)" % channel_id)
continue
if channel.compression in [Compression.RAW, Compression.ZIP, Compression.ZIP_WITH_PREDICTION]:
if depth == 8:
im = _from_8bit_raw(channel.data, size)
elif depth == 16:
im = _from_16bit_raw(channel.data, size)
elif depth == 32:
im = _from_32bit_raw(channel.data, size)
else:
warnings.warn("Unsupported depth (%s)" % depth)
continue
elif channel.compression == Compression.PACK_BITS:
if depth != 8:
warnings.warn("Depth %s is unsupported for PackBits compression" % depth)
continue
im = frombytes('L', size, channel.data, "packbits", 'L')
else:
if Compression.is_known(channel.compression):
warnings.warn("Compression method is not implemented (%s)" % channel.compression)
else:
warnings.warn("Unknown compression method (%s)" % channel.compression)
continue
bands[pil_band] = im.convert('L')
return bands
def _channels_data_to_PIL(channels_data, channel_types, size, depth, icc_profile):
if Image is None:
raise Exception("This module requires PIL (or Pillow) installed.")
if size == (0, 0):
return
bands = {}
for channel, channel_type in zip(channels_data, channel_types):
pil_band = channel_id_to_PIL(channel_type)
if pil_band is None:
warnings.warn("Unsupported channel type (%d)" % channel_type)
continue
if channel.compression in [Compression.RAW, Compression.ZIP, Compression.ZIP_WITH_PREDICTION]:
if depth == 8:
im = _from_8bit_raw(channel.data, size)
elif depth == 16:
im = _from_16bit_raw(channel.data, size)
elif depth == 32:
im = _from_32bit_raw(channel.data, size)
else:
warnings.warn("Unsupported depth (%s)" % depth)
continue
elif channel.compression == Compression.PACK_BITS:
if depth != 8:
warnings.warn("Depth %s is unsupported for PackBits compression" % depth)
continue
im = frombytes('L', size, channel.data, "packbits", 'L')
else:
if Compression.is_known(channel.compression):
warnings.warn("Compression method is not implemented (%s)" % channel.compression)
else:
warnings.warn("Unknown compression method (%s)" % channel.compression)
continue
bands[pil_band] = im.convert('L')
mode = _get_mode(bands.keys())
merged_image = Image.merge(mode, [bands[band] for band in mode])
if mode == 'CMYK':
# invert CMYK data
merged_image = frombytes('CMYK', size, merged_image.tobytes(), 'raw',
'CMYK;I')
# convert with inner profile, better brightness
merged_image = merged_image.convert('RGB')
elif icc_profile is not None:
display_profile = ImageCms.createProfile('sRGB') # XXX: ImageCms.get_display_profile()?
ImageCms.profileToProfile(merged_image, icc_profile, display_profile, inPlace=True)
return merged_image
def _channels_data_to_PIL(channels_data, channel_types, size, depth, icc_profile):
if Image is None:
raise Exception("This module requires PIL (or Pillow) installed.")
if size == (0, 0):
return
bands = {}
for channel, channel_type in zip(channels_data, channel_types):
pil_band = channel_id_to_PIL(channel_type)
if pil_band is None:
warnings.warn("Unsupported channel type (%d)" % channel_type)
continue
if channel.compression in [Compression.RAW, Compression.ZIP, Compression.ZIP_WITH_PREDICTION]:
if depth == 8:
im = _from_8bit_raw(channel.data, size)
elif depth == 16:
im = _from_16bit_raw(channel.data, size)
elif depth == 32:
im = _from_32bit_raw(channel.data, size)
else:
warnings.warn("Unsupported depth (%s)" % depth)
continue
elif channel.compression == Compression.PACK_BITS:
if depth != 8:
warnings.warn("Depth %s is unsupported for PackBits compression" % depth)
continue
im = frombytes('L', size, channel.data, "packbits", 'L')
else:
if Compression.is_known(channel.compression):
warnings.warn("Compression method is not implemented (%s)" % channel.compression)
else:
warnings.warn("Unknown compression method (%s)" % channel.compression)
continue
bands[pil_band] = im.convert('L')
mode = _get_mode(bands.keys())
merged_image = Image.merge(mode, [bands[band] for band in mode])
if icc_profile is not None:
display_profile = ImageCms.createProfile('sRGB') # XXX: ImageCms.get_display_profile()?
ImageCms.profileToProfile(merged_image, icc_profile, display_profile, inPlace=True)
return merged_image
def _decompress_pattern_channel(channel):
depth = channel.depth
size = (channel.rectangle[3], channel.rectangle[2])
if channel.compression in (Compression.RAW, Compression.ZIP,
Compression.ZIP_WITH_PREDICTION):
if depth == 8:
im = _from_8bit_raw(channel.data.value, size)
elif depth == 16:
im = _from_16bit_raw(channel.data.value, size)
elif depth == 32:
im = _from_32bit_raw(channel.data.value, size)
else:
warnings.warn("Unsupported depth (%s)" % depth)
return None
elif channel.compression == Compression.PACK_BITS:
if depth != 8:
warnings.warn(
"Depth %s is unsupported for PackBits compression" % depth)
try:
import packbits
channel_data = packbits.decode(channel.data.value)
except ImportError as e:
warnings.warn("Install packbits (%s)" % e)
channel_data = b'\x00' * (size[0] * size[1]) # Default fill
except IndexError as e:
warnings.warn("Failed to decode pattern (%s)" % e)
channel_data = b'\x00' * (size[0] * size[1]) # Default fill
# Packbit pattern tends not to have the correct size ???
padding = len(channel_data) - size[0] * size[1]
if padding < 0:
warnings.warn('Broken pattern data (%g for %g)' % (
len(channel_data), size[0] * size[1]))
channel_data += b'\x00' * -padding # Append default fill
padding = 0
im = frombytes('L', size, channel_data[padding:], "raw", 'L')
else:
if Compression.is_known(channel.compression):
warnings.warn(
"Compression method is not implemented "
"(%s)" % channel.compression)
else:
warnings.warn(
"Unknown compression method (%s)" % channel.compression)
return None
return im.convert('L')
def _get_band_images(layer, channel_data, channel_ids, color_mode, size,
depth):
bands = {}
for channel, channel_id in zip(channel_data, channel_ids):
im = None
mask_im = None
mask_size = None
pil_band = _channel_id_to_PIL(channel_id, color_mode)
if pil_band is None:
warnings.warn("Unsupported channel type (%d)" % channel_id)
continue
if channel.compression in [
Compression.RAW, Compression.ZIP,
Compression.ZIP_WITH_PREDICTION
]:
if pil_band == 'M':
mask_size = (channel.mask_data.width(),
channel.mask_data.height())
if mask_size[0] == 0 or mask_size[1] == 0:
# warnings.warn("Empty layer mask found on layer '%s', ignoring it." % layer.name)
continue
try:
mask_im = _from_8bit_raw(channel.data, mask_size)
except Exception as e:
warnings.warn("Failed parsing layer mask! " + str(e))
continue
elif depth == 8:
im = _from_8bit_raw(channel.data, size)
elif depth == 16:
im = _from_16bit_raw(channel.data, size)
elif depth == 32:
im = _from_32bit_raw(channel.data, size)
else:
warnings.warn("Unsupported depth (%s)" % depth)
continue
elif channel.compression == Compression.PACK_BITS:
if depth != 8:
warnings.warn(
"Depth %s is unsupported for PackBits compression" % depth)
continue
if pil_band == 'M':
mask_size = (channel.mask_data.width(),
channel.mask_data.height())
if mask_size[0] == 0 or mask_size[1] == 0:
# warnings.warn("Empty layer mask found on layer '%s', ignoring it." % layer.name)
continue
try:
mask_im = frombytes('L', mask_size, channel.data,
"packbits", 'L')
except Exception as e:
warnings.warn("Failed parsing layer mask! " + str(e))
continue
else:
im = frombytes('L', size, channel.data, "packbits", 'L')
else:
if Compression.is_known(channel.compression):
warnings.warn("Compression method is not implemented (%s)" %
channel.compression)
else:
warnings.warn("Unknown compression method (%s)" %
channel.compression)
continue
if pil_band == 'M':
if layer_mask_callback(layer) == False:
continue
im = Image.new('L', size, 255)
offset = (channel.mask_data.left - layer.left,
channel.mask_data.top - layer.top)
im.paste(mask_im, offset)
bands[pil_band] = im.convert('L')
return bands
