def _read_additional_layer_info_block(fp):
"""
Reads a tagged block with additional layer information.
"""
sig = fp.read(4)
if sig not in [b'8BIM', b'8B64']:
fp.seek(-4, 1)
#warnings.warn("not a block: %r" % sig)
return
key = fp.read(4)
length = pad(read_fmt("I", fp)[0], 4)
data = fp.read(length)
return Block(key, data)
def _read_block(fp, encoding):
"""
Reads single image resource block. Such blocks contain non-pixel data
for the images (e.g. pen tool paths).
"""
sig = fp.read(4)
if sig != b"8BIM":
raise Error("Invalid resource signature (%r)" % sig)
resource_id = read_fmt("H", fp)[0]
name = read_pascal_string(fp, encoding, 2)
data_size = pad(read_fmt("I", fp)[0], 2)
data = fp.read(data_size)
return ImageResource(resource_id, name, data)
def _read_block(fp, encoding):
"""
Reads single image resource block. Such blocks contain non-pixel data
for the images (e.g. pen tool paths).
"""
sig = fp.read(4)
if sig not in [b'8BIM', b'MeSa']:
raise Error("Invalid resource signature (%r)" % sig)
resource_id = read_fmt("H", fp)[0]
name = read_pascal_string(fp, encoding, 2)
data_size = pad(read_fmt("I", fp)[0], 2)
data = fp.read(data_size)
return ImageResource(resource_id, name, data)
def _read_block(fp, encoding):
"""
Reads single image resource block. Such blocks contain non-pixel data
for the images (e.g. pen tool paths).
"""
sig = fp.read(4)
if not sig in (b'8BIM', b'MeSa'):
raise Error("Invalid resource signature (%r)" % sig)
resource_id = read_fmt("H", fp)[0]
name = read_pascal_string(fp, encoding, 2)
data_size = pad(read_fmt("I", fp)[0], 2)
if not data_size:
logger.debug(
"Found image resource with no data (%d %s). Dropping..." % (
resource_id, ImageResourceID.name_of(resource_id)
))
return None
data = fp.read(data_size)
return ImageResource(resource_id, name, data)
def _read_additional_layer_info_block(fp, padding):
"""
Reads a tagged block with additional layer information.
"""
sig = fp.read(4)
if sig not in (b'8BIM', b'8B64'):
raise Error("Invalid signature of tagged block (%r)" % sig)
key = fp.read(4)
length = read_fmt("I", fp)[0]
if not length:
logger.debug(
"Found tagged block with no data (%s %s). Dropping..." % (
key, TaggedBlock.name_of(key)
))
return None
if padding > 0:
length = pad(length, padding)
data = fp.read(length)
return Block(key, data)
def _read_additional_layer_info_block(fp, padding, version):
"""
Reads a tagged block with additional layer information.
"""
sig = fp.read(4)
if sig not in [b'8BIM', b'8B64']:
fp.seek(-4, 1)
#warnings.warn("not a block: %r" % sig)
return
key = fp.read(4)
if version == 2 and key in (b'LMsk', b'Lr16', b'Lr32', b'Layr', b'Mt16',
b'Mt32', b'Mtrn', b'Alph', b'FMsk', b'lnk2',
b'FEid', b'FXid', b'PxSD'):
length = read_fmt("Q", fp)[0]
else:
length = read_fmt("I", fp)[0]
if padding > 0:
length = pad(length, padding)
data = fp.read(length)
return Block(key, data)
