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# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
import array
import struct
import zlib
from enum import Enum
from pkg_resources import parse_version
from kaitaistruct import __version__ as ks_version, KaitaiStruct, KaitaiStream, BytesIO
if parse_version(ks_version) < parse_version('0.7'):
raise Exception("Incompatible Kaitai Struct Python API: 0.7 or later is required, but you have %s" % (ks_version))
class Png(KaitaiStruct):
class ColorType(Enum):
greyscale = 0
truecolor = 2
indexed = 3
greyscale_alpha = 4
truecolor_alpha = 6
class PhysUnit(Enum):
unknown = 0
meter = 1
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.magic = self._io.ensure_fixed_contents(struct.pack('8b', -119, 80, 78, 71, 13, 10, 26, 10))
self.ihdr_len = self._io.ensure_fixed_contents(struct.pack('4b', 0, 0, 0, 13))
self.ihdr_type = self._io.ensure_fixed_contents(struct.pack('4b', 73, 72, 68, 82))
self.ihdr = self._root.IhdrChunk(self._io, self, self._root)
self.ihdr_crc = self._io.read_bytes(4)
self.chunks = []
while not self._io.is_eof():
self.chunks.append(self._root.Chunk(self._io, self, self._root))
class Rgb(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.r = self._io.read_u1()
self.g = self._io.read_u1()
self.b = self._io.read_u1()
class Chunk(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.len = self._io.read_u4be()
self.type = (self._io.read_bytes(4)).decode(u"UTF-8")
_on = self.type
if _on == u"iTXt":
self._raw_body = self._io.read_bytes(self.len)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.InternationalTextChunk(io, self, self._root)
elif _on == u"gAMA":
self._raw_body = self._io.read_bytes(self.len)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.GamaChunk(io, self, self._root)
elif _on == u"tIME":
self._raw_body = self._io.read_bytes(self.len)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.TimeChunk(io, self, self._root)
elif _on == u"PLTE":
self._raw_body = self._io.read_bytes(self.len)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.PlteChunk(io, self, self._root)
elif _on == u"bKGD":
self._raw_body = self._io.read_bytes(self.len)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BkgdChunk(io, self, self._root)
elif _on == u"pHYs":
self._raw_body = self._io.read_bytes(self.len)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.PhysChunk(io, self, self._root)
elif _on == u"tEXt":
self._raw_body = self._io.read_bytes(self.len)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.TextChunk(io, self, self._root)
elif _on == u"cHRM":
self._raw_body = self._io.read_bytes(self.len)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.ChrmChunk(io, self, self._root)
elif _on == u"sRGB":
self._raw_body = self._io.read_bytes(self.len)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.SrgbChunk(io, self, self._root)
elif _on == u"zTXt":
self._raw_body = self._io.read_bytes(self.len)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.CompressedTextChunk(io, self, self._root)
else:
self.body = self._io.read_bytes(self.len)
self.crc = self._io.read_bytes(4)
class BkgdIndexed(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.palette_index = self._io.read_u1()
class Point(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.x_int = self._io.read_u4be()
self.y_int = self._io.read_u4be()
@property
def x(self):
if hasattr(self, '_m_x'):
return self._m_x if hasattr(self, '_m_x') else None
self._m_x = (self.x_int / 100000.0)
return self._m_x if hasattr(self, '_m_x') else None
@property
def y(self):
if hasattr(self, '_m_y'):
return self._m_y if hasattr(self, '_m_y') else None
self._m_y = (self.y_int / 100000.0)
return self._m_y if hasattr(self, '_m_y') else None
class BkgdGreyscale(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.value = self._io.read_u2be()
class ChrmChunk(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.white_point = self._root.Point(self._io, self, self._root)
self.red = self._root.Point(self._io, self, self._root)
self.green = self._root.Point(self._io, self, self._root)
self.blue = self._root.Point(self._io, self, self._root)
class IhdrChunk(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.width = self._io.read_u4be()
self.height = self._io.read_u4be()
self.bit_depth = self._io.read_u1()
self.color_type = self._root.ColorType(self._io.read_u1())
self.compression_method = self._io.read_u1()
self.filter_method = self._io.read_u1()
self.interlace_method = self._io.read_u1()
class PlteChunk(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.entries = []
while not self._io.is_eof():
self.entries.append(self._root.Rgb(self._io, self, self._root))
class SrgbChunk(KaitaiStruct):
class Intent(Enum):
perceptual = 0
relative_colorimetric = 1
saturation = 2
absolute_colorimetric = 3
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.render_intent = self._root.SrgbChunk.Intent(self._io.read_u1())
class CompressedTextChunk(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.keyword = (self._io.read_bytes_term(0, False, True, True)).decode(u"UTF-8")
self.compression_method = self._io.read_u1()
self._raw_text_datastream = self._io.read_bytes_full()
self.text_datastream = zlib.decompress(self._raw_text_datastream)
class BkgdTruecolor(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.red = self._io.read_u2be()
self.green = self._io.read_u2be()
self.blue = self._io.read_u2be()
class GamaChunk(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.gamma_int = self._io.read_u4be()
@property
def gamma_ratio(self):
if hasattr(self, '_m_gamma_ratio'):
return self._m_gamma_ratio if hasattr(self, '_m_gamma_ratio') else None
self._m_gamma_ratio = (100000.0 / self.gamma_int)
return self._m_gamma_ratio if hasattr(self, '_m_gamma_ratio') else None
class BkgdChunk(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
_on = self._root.ihdr.color_type
if _on == self._root.ColorType.greyscale_alpha:
self.bkgd = self._root.BkgdGreyscale(self._io, self, self._root)
elif _on == self._root.ColorType.indexed:
self.bkgd = self._root.BkgdIndexed(self._io, self, self._root)
elif _on == self._root.ColorType.greyscale:
self.bkgd = self._root.BkgdGreyscale(self._io, self, self._root)
elif _on == self._root.ColorType.truecolor_alpha:
self.bkgd = self._root.BkgdTruecolor(self._io, self, self._root)
elif _on == self._root.ColorType.truecolor:
self.bkgd = self._root.BkgdTruecolor(self._io, self, self._root)
class PhysChunk(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.pixels_per_unit_x = self._io.read_u4be()
self.pixels_per_unit_y = self._io.read_u4be()
self.unit = self._root.PhysUnit(self._io.read_u1())
class InternationalTextChunk(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.keyword = (self._io.read_bytes_term(0, False, True, True)).decode(u"UTF-8")
self.compression_flag = self._io.read_u1()
self.compression_method = self._io.read_u1()
self.language_tag = (self._io.read_bytes_term(0, False, True, True)).decode(u"ASCII")
self.translated_keyword = (self._io.read_bytes_term(0, False, True, True)).decode(u"UTF-8")
self.text = (self._io.read_bytes_full()).decode(u"UTF-8")
class TextChunk(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.keyword = (self._io.read_bytes_term(0, False, True, True)).decode(u"iso8859-1")
self.text = (self._io.read_bytes_full()).decode(u"iso8859-1")
class TimeChunk(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self.year = self._io.read_u2be()
self.month = self._io.read_u1()
self.day = self._io.read_u1()
self.hour = self._io.read_u1()
self.minute = self._io.read_u1()
self.second = self._io.read_u1()
|
