1# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild 2 3from pkg_resources import parse_version 4from kaitaistruct import __version__ as ks_version, KaitaiStruct, KaitaiStream, BytesIO 5import struct 6 7 8if parse_version(ks_version) < parse_version('0.7'): 9 raise Exception("Incompatible Kaitai Struct Python API: 0.7 or later is required, but you have %s" % (ks_version)) 10 11class Ico(KaitaiStruct): 12 """Microsoft Windows uses specific file format to store applications 13 icons - ICO. This is a container that contains one or more image 14 files (effectively, DIB parts of BMP files or full PNG files are 15 contained inside). 16 17 .. seealso:: 18 Source - https://msdn.microsoft.com/en-us/library/ms997538.aspx 19 """ 20 def __init__(self, _io, _parent=None, _root=None): 21 self._io = _io 22 self._parent = _parent 23 self._root = _root if _root else self 24 self._read() 25 26 def _read(self): 27 self.magic = self._io.ensure_fixed_contents(struct.pack('4b', 0, 0, 1, 0)) 28 self.num_images = self._io.read_u2le() 29 self.images = [None] * (self.num_images) 30 for i in range(self.num_images): 31 self.images[i] = self._root.IconDirEntry(self._io, self, self._root) 32 33 34 class IconDirEntry(KaitaiStruct): 35 def __init__(self, _io, _parent=None, _root=None): 36 self._io = _io 37 self._parent = _parent 38 self._root = _root if _root else self 39 self._read() 40 41 def _read(self): 42 self.width = self._io.read_u1() 43 self.height = self._io.read_u1() 44 self.num_colors = self._io.read_u1() 45 self.reserved = self._io.ensure_fixed_contents(struct.pack('1b', 0)) 46 self.num_planes = self._io.read_u2le() 47 self.bpp = self._io.read_u2le() 48 self.len_img = self._io.read_u4le() 49 self.ofs_img = self._io.read_u4le() 50 51 @property 52 def img(self): 53 """Raw image data. Use `is_png` to determine whether this is an 54 embedded PNG file (true) or a DIB bitmap (false) and call a 55 relevant parser, if needed to parse image data further. 56 """ 57 if hasattr(self, '_m_img'): 58 return self._m_img if hasattr(self, '_m_img') else None 59 60 _pos = self._io.pos() 61 self._io.seek(self.ofs_img) 62 self._m_img = self._io.read_bytes(self.len_img) 63 self._io.seek(_pos) 64 return self._m_img if hasattr(self, '_m_img') else None 65 66 @property 67 def png_header(self): 68 """Pre-reads first 8 bytes of the image to determine if it's an 69 embedded PNG file. 70 """ 71 if hasattr(self, '_m_png_header'): 72 return self._m_png_header if hasattr(self, '_m_png_header') else None 73 74 _pos = self._io.pos() 75 self._io.seek(self.ofs_img) 76 self._m_png_header = self._io.read_bytes(8) 77 self._io.seek(_pos) 78 return self._m_png_header if hasattr(self, '_m_png_header') else None 79 80 @property 81 def is_png(self): 82 """True if this image is in PNG format.""" 83 if hasattr(self, '_m_is_png'): 84 return self._m_is_png if hasattr(self, '_m_is_png') else None 85 86 self._m_is_png = self.png_header == struct.pack('8b', -119, 80, 78, 71, 13, 10, 26, 10) 87 return self._m_is_png if hasattr(self, '_m_is_png') else None 88 89 90 91