def read_enabled(self, stream: Stream):
"""
Reads the layer 'enabled' state
"""
enabled = stream.read_uint()
self.enabled = enabled == 1
stream.log('read enabled ({})'.format(self.enabled), 4)
def read(self, stream: Stream, version):
"""
Reads the decoration information
"""
self.fixed_angle = not bool(stream.read_uchar())
stream.log('detected {}'.format(
'fixed angle' if self.fixed_angle else 'not fixed angle'))
self.flip_first = bool(stream.read_uchar())
stream.log('detected {}'.format(
'flip first' if self.flip_first else 'no flip first'))
self.flip_all = bool(stream.read_uchar())
stream.log('detected {}'.format(
'flip all' if self.flip_all else 'no flip all'))
stream.read(2) # unknown -- maybe includes position as ratio?
self.marker = stream.read_object('marker')
# next bit is the number of doubles coming next
marker_number_positions = stream.read_uint('marker positions')
# next bit is the positions themselves -- maybe we can infer this from the number of positions
# alone. E.g. 2 positions = 0, 1. 3 positions = 0, 0.5, 1
for _ in range(marker_number_positions):
self.marker_positions.append(stream.read_double())
stream.log('marker positions are {}'.format(self.marker_positions))
def _read(self, stream: Stream, version):
number_layers = stream.read_uint('layer count')
for i in range(number_layers):
layer = stream.read_object('symbol layer {}/{}'.format(
i + 1, number_layers))
self.levels.extend([layer])
# the next section varies in size. To handle this we jump forward to a known anchor
# point, and then move back by a known amount
# burn up to the 02
stream.log('burning up to 02...')
while not binascii.hexlify(stream.read(1)) == b'02':
pass
# jump back a known amount
stream.rewind(8 * number_layers + 1)
# TODO - replace the fragile bit above!
# stream.read(1)
# stream.read_double('unknown size')
# stream.read_double('unknown size')
for l in self.levels:
l.read_enabled(stream)
for l in self.levels:
l.read_locked(stream)
def read_locked(self, stream: Stream):
"""
Reads the layer 'locked' state
"""
locked = stream.read_uint()
self.locked = locked == 1
stream.log('read layer locked ({})'.format(self.locked), 4)
def read(self, stream: Stream, version):
self.ramp = stream.read_object('Color ramp')
_ = stream.read_object('unused color')
# either an entire LineSymbol or just a LineSymbolLayer
outline = stream.read_object('outline')
if outline is not None:
if issubclass(outline.__class__, SymbolLayer):
self.outline_layer = outline
else:
self.outline_symbol = outline
self.percent = stream.read_double('percent')
self.intervals = stream.read_uint('intervals')
self.angle = stream.read_double('angle')
self.type = stream.read_uint('Gradient type')
stream.read_0d_terminator()
def read(self, stream: Stream, version):
"""
Reads the decoration information
"""
# next bit is probably number of decorations?
count = stream.read_uint('count of decorations')
for i in range(count):
decoration = stream.read_object('decoration element {}/{}'.format(
i, count))
self.decorations.append(decoration)
def read_line_type(stream: Stream):
"""
Interprets the line type bytes
"""
line_type = stream.read_uint()
types = {0: 'solid',
1: 'dashed',
2: 'dotted',
3: 'dash dot',
4: 'dash dot dot',
5: 'null'}
if line_type not in types:
raise UnreadableSymbolException('unknown line type {} at {}'.format(line_type, hex(stream.tell() - 4)))
return types[line_type]
def read(self, stream: Stream, version):
if not stream.read_0d_terminator():
raise UnreadableSymbolException('Could not find 0d terminator at {}'.format(hex(stream.tell() - 8)))
number_layers = stream.read_uint('layer count')
for i in range(number_layers):
layer = stream.read_object('symbol layer {}/{}'.format(i + 1, number_layers))
self.levels.extend([layer])
for l in self.levels:
l.read_enabled(stream)
for l in self.levels:
l.read_locked(stream)
if version >= 2:
for l in self.levels:
l.read_tags(stream)
def read(self, stream: Stream, version):
if version == 4:
self.picture = stream.read_object('picture')
elif version == 7:
_ = stream.read_ushort('pic version?')
_ = stream.read_uint('picture type?')
self.picture = stream.read_object('picture')
elif version == 8:
self.picture = stream.read_picture('picture')
self.color_background = stream.read_object('color bg')
self.color_foreground = stream.read_object('color fg')
self.color_transparent = stream.read_object('color trans')
# either an entire LineSymbol or just a LineSymbolLayer
outline = stream.read_object('outline')
if outline is not None:
if issubclass(outline.__class__, SymbolLayer):
self.outline_layer = outline
else:
self.outline_symbol = outline
self.angle = stream.read_double('angle')
self.scale_x = stream.read_double('scale_x')
self.scale_y = stream.read_double('scale_y')
self.offset_x = stream.read_double('offset x')
self.offset_y = stream.read_double('offset y')
self.separation_x = stream.read_double('separation x')
self.separation_y = stream.read_double('separation y')
stream.read(16)
stream.read_0d_terminator()
self.swap_fb_gb = bool(stream.read_uchar('swap fgbg'))
if version <= 4:
return
stream.read(6)
if version < 8:
stream.read(4)
def read(self, stream: Stream, version):
self.color = stream.read_object('color')
self.size = stream.read_double('size')
self.width = stream.read_double('width')
self.angle = stream.read_double('angle')
# 12 bytes unknown purpose
stream.log('skipping 12 unknown bytes')
_ = stream.read_uint('unknown')
stream.read_0d_terminator()
self.x_offset = stream.read_double('x offset')
self.y_offset = stream.read_double('y offset')
check = binascii.hexlify(stream.read(2))
if check != b'ffff':
raise UnreadableSymbolException('Expected ffff at {}, got {}'.format(check, hex(stream.tell() - 2)))
def read(self, stream: Stream, version):
if version in (4, 5):
self.picture = stream.read_object('picture')
elif version == 8:
_ = stream.read_ushort('pic version?')
_ = stream.read_uint('picture type?')
self.picture = stream.read_object('picture')
elif version == 9:
self.picture = stream.read_picture('picture')
if version <= 8:
_ = stream.read_object()
self.color_foreground = stream.read_object('color 1')
self.color_background = stream.read_object('color 2')
if version >= 9:
self.color_transparent = stream.read_object('color 3')
self.angle = stream.read_double('angle')
self.size = stream.read_double('size')
self.x_offset = stream.read_double('x offset')
self.y_offset = stream.read_double('y offset')
stream.read_double('unknown')
stream.read_double('unknown')
stream.read_0d_terminator()
self.swap_fb_gb = bool(stream.read_uchar('swap fgbg'))
check = binascii.hexlify(stream.read(2))
if check != b'ffff':
raise UnreadableSymbolException('Expected ffff at {}, got {}'.format(check, hex(stream.tell() - 2)))
if version < 6:
return
stream.read(6)
if version <= 8:
stream.read(4)
