2025-12-25 upload

venv/Lib/site-packages/mitmproxy/contrib/kaitaistruct/gif.py

@@ -0,0 +1,357 @@
+# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
+
+import kaitaistruct
+from kaitaistruct import KaitaiStruct, KaitaiStream, BytesIO
+from enum import Enum
+
+
+if getattr(kaitaistruct, 'API_VERSION', (0, 9)) < (0, 9):
+    raise Exception("Incompatible Kaitai Struct Python API: 0.9 or later is required, but you have %s" % (kaitaistruct.__version__))
+
+class Gif(KaitaiStruct):
+    """GIF (Graphics Interchange Format) is an image file format, developed
+    in 1987. It became popular in 1990s as one of the main image formats
+    used in World Wide Web.
+    
+    GIF format allows encoding of palette-based images up to 256 colors
+    (each of the colors can be chosen from a 24-bit RGB
+    colorspace). Image data stream uses LZW (Lempel-Ziv-Welch) lossless
+    compression.
+    
+    Over the years, several version of the format were published and
+    several extensions to it were made, namely, a popular Netscape
+    extension that allows to store several images in one file, switching
+    between them, which produces crude form of animation.
+    
+    Structurally, format consists of several mandatory headers and then
+    a stream of blocks follows. Blocks can carry additional
+    metainformation or image data.
+    """
+
+    class BlockType(Enum):
+        extension = 33
+        local_image_descriptor = 44
+        end_of_file = 59
+
+    class ExtensionLabel(Enum):
+        graphic_control = 249
+        comment = 254
+        application = 255
+    def __init__(self, _io, _parent=None, _root=None):
+        self._io = _io
+        self._parent = _parent
+        self._root = _root if _root else self
+        self._read()
+
+    def _read(self):
+        self.hdr = Gif.Header(self._io, self, self._root)
+        self.logical_screen_descriptor = Gif.LogicalScreenDescriptorStruct(self._io, self, self._root)
+        if self.logical_screen_descriptor.has_color_table:
+            self._raw_global_color_table = self._io.read_bytes((self.logical_screen_descriptor.color_table_size * 3))
+            _io__raw_global_color_table = KaitaiStream(BytesIO(self._raw_global_color_table))
+            self.global_color_table = Gif.ColorTable(_io__raw_global_color_table, self, self._root)
+
+        self.blocks = []
+        i = 0
+        while True:
+            _ = Gif.Block(self._io, self, self._root)
+            self.blocks.append(_)
+            if  ((self._io.is_eof()) or (_.block_type == Gif.BlockType.end_of_file)) :
+                break
+            i += 1
+
+    class ImageData(KaitaiStruct):
+        """
+        .. seealso::
+           - section 22 - https://www.w3.org/Graphics/GIF/spec-gif89a.txt
+        """
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.lzw_min_code_size = self._io.read_u1()
+            self.subblocks = Gif.Subblocks(self._io, self, self._root)
+
+
+    class ColorTableEntry(KaitaiStruct):
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.red = self._io.read_u1()
+            self.green = self._io.read_u1()
+            self.blue = self._io.read_u1()
+
+
+    class LogicalScreenDescriptorStruct(KaitaiStruct):
+        """
+        .. seealso::
+           - section 18 - https://www.w3.org/Graphics/GIF/spec-gif89a.txt
+        """
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.screen_width = self._io.read_u2le()
+            self.screen_height = self._io.read_u2le()
+            self.flags = self._io.read_u1()
+            self.bg_color_index = self._io.read_u1()
+            self.pixel_aspect_ratio = self._io.read_u1()
+
+        @property
+        def has_color_table(self):
+            if hasattr(self, '_m_has_color_table'):
+                return self._m_has_color_table
+
+            self._m_has_color_table = (self.flags & 128) != 0
+            return getattr(self, '_m_has_color_table', None)
+
+        @property
+        def color_table_size(self):
+            if hasattr(self, '_m_color_table_size'):
+                return self._m_color_table_size
+
+            self._m_color_table_size = (2 << (self.flags & 7))
+            return getattr(self, '_m_color_table_size', None)
+
+
+    class LocalImageDescriptor(KaitaiStruct):
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.left = self._io.read_u2le()
+            self.top = self._io.read_u2le()
+            self.width = self._io.read_u2le()
+            self.height = self._io.read_u2le()
+            self.flags = self._io.read_u1()
+            if self.has_color_table:
+                self._raw_local_color_table = self._io.read_bytes((self.color_table_size * 3))
+                _io__raw_local_color_table = KaitaiStream(BytesIO(self._raw_local_color_table))
+                self.local_color_table = Gif.ColorTable(_io__raw_local_color_table, self, self._root)
+
+            self.image_data = Gif.ImageData(self._io, self, self._root)
+
+        @property
+        def has_color_table(self):
+            if hasattr(self, '_m_has_color_table'):
+                return self._m_has_color_table
+
+            self._m_has_color_table = (self.flags & 128) != 0
+            return getattr(self, '_m_has_color_table', None)
+
+        @property
+        def has_interlace(self):
+            if hasattr(self, '_m_has_interlace'):
+                return self._m_has_interlace
+
+            self._m_has_interlace = (self.flags & 64) != 0
+            return getattr(self, '_m_has_interlace', None)
+
+        @property
+        def has_sorted_color_table(self):
+            if hasattr(self, '_m_has_sorted_color_table'):
+                return self._m_has_sorted_color_table
+
+            self._m_has_sorted_color_table = (self.flags & 32) != 0
+            return getattr(self, '_m_has_sorted_color_table', None)
+
+        @property
+        def color_table_size(self):
+            if hasattr(self, '_m_color_table_size'):
+                return self._m_color_table_size
+
+            self._m_color_table_size = (2 << (self.flags & 7))
+            return getattr(self, '_m_color_table_size', None)
+
+
+    class Block(KaitaiStruct):
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.block_type = KaitaiStream.resolve_enum(Gif.BlockType, self._io.read_u1())
+            _on = self.block_type
+            if _on == Gif.BlockType.extension:
+                self.body = Gif.Extension(self._io, self, self._root)
+            elif _on == Gif.BlockType.local_image_descriptor:
+                self.body = Gif.LocalImageDescriptor(self._io, self, self._root)
+
+
+    class ColorTable(KaitaiStruct):
+        """
+        .. seealso::
+           - section 19 - https://www.w3.org/Graphics/GIF/spec-gif89a.txt
+        """
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.entries = []
+            i = 0
+            while not self._io.is_eof():
+                self.entries.append(Gif.ColorTableEntry(self._io, self, self._root))
+                i += 1
+
+
+
+    class Header(KaitaiStruct):
+        """
+        .. seealso::
+           - section 17 - https://www.w3.org/Graphics/GIF/spec-gif89a.txt
+        """
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.magic = self._io.read_bytes(3)
+            if not self.magic == b"\x47\x49\x46":
+                raise kaitaistruct.ValidationNotEqualError(b"\x47\x49\x46", self.magic, self._io, u"/types/header/seq/0")
+            self.version = (self._io.read_bytes(3)).decode(u"ASCII")
+
+
+    class ExtGraphicControl(KaitaiStruct):
+        """
+        .. seealso::
+           - section 23 - https://www.w3.org/Graphics/GIF/spec-gif89a.txt
+        """
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.block_size = self._io.read_bytes(1)
+            if not self.block_size == b"\x04":
+                raise kaitaistruct.ValidationNotEqualError(b"\x04", self.block_size, self._io, u"/types/ext_graphic_control/seq/0")
+            self.flags = self._io.read_u1()
+            self.delay_time = self._io.read_u2le()
+            self.transparent_idx = self._io.read_u1()
+            self.terminator = self._io.read_bytes(1)
+            if not self.terminator == b"\x00":
+                raise kaitaistruct.ValidationNotEqualError(b"\x00", self.terminator, self._io, u"/types/ext_graphic_control/seq/4")
+
+        @property
+        def transparent_color_flag(self):
+            if hasattr(self, '_m_transparent_color_flag'):
+                return self._m_transparent_color_flag
+
+            self._m_transparent_color_flag = (self.flags & 1) != 0
+            return getattr(self, '_m_transparent_color_flag', None)
+
+        @property
+        def user_input_flag(self):
+            if hasattr(self, '_m_user_input_flag'):
+                return self._m_user_input_flag
+
+            self._m_user_input_flag = (self.flags & 2) != 0
+            return getattr(self, '_m_user_input_flag', None)
+
+
+    class Subblock(KaitaiStruct):
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.len_bytes = self._io.read_u1()
+            self.bytes = self._io.read_bytes(self.len_bytes)
+
+
+    class ApplicationId(KaitaiStruct):
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.len_bytes = self._io.read_u1()
+            if not self.len_bytes == 11:
+                raise kaitaistruct.ValidationNotEqualError(11, self.len_bytes, self._io, u"/types/application_id/seq/0")
+            self.application_identifier = (self._io.read_bytes(8)).decode(u"ASCII")
+            self.application_auth_code = self._io.read_bytes(3)
+
+
+    class ExtApplication(KaitaiStruct):
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.application_id = Gif.ApplicationId(self._io, self, self._root)
+            self.subblocks = []
+            i = 0
+            while True:
+                _ = Gif.Subblock(self._io, self, self._root)
+                self.subblocks.append(_)
+                if _.len_bytes == 0:
+                    break
+                i += 1
+
+
+    class Subblocks(KaitaiStruct):
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.entries = []
+            i = 0
+            while True:
+                _ = Gif.Subblock(self._io, self, self._root)
+                self.entries.append(_)
+                if _.len_bytes == 0:
+                    break
+                i += 1
+
+
+    class Extension(KaitaiStruct):
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._read()
+
+        def _read(self):
+            self.label = KaitaiStream.resolve_enum(Gif.ExtensionLabel, self._io.read_u1())
+            _on = self.label
+            if _on == Gif.ExtensionLabel.application:
+                self.body = Gif.ExtApplication(self._io, self, self._root)
+            elif _on == Gif.ExtensionLabel.comment:
+                self.body = Gif.Subblocks(self._io, self, self._root)
+            elif _on == Gif.ExtensionLabel.graphic_control:
+                self.body = Gif.ExtGraphicControl(self._io, self, self._root)
+            else:
+                self.body = Gif.Subblocks(self._io, self, self._root)
+
+
+