84 lines
3.6 KiB
Python
84 lines
3.6 KiB
Python
from lib.hachoir_core.field import (FieldSet, ParserError,
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UInt8, UInt16, UInt32,
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String, CString, PascalString8,
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NullBytes, RawBytes)
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from lib.hachoir_core.text_handler import textHandler, hexadecimal
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from lib.hachoir_core.tools import alignValue, createDict
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from lib.hachoir_parser.image.iptc import IPTC
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from lib.hachoir_parser.common.win32 import PascalStringWin32
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class Version(FieldSet):
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def createFields(self):
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yield UInt32(self, "version")
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yield UInt8(self, "has_realm")
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yield PascalStringWin32(self, "writer_name", charset="UTF-16-BE")
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yield PascalStringWin32(self, "reader_name", charset="UTF-16-BE")
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yield UInt32(self, "file_version")
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size = (self.size - self.current_size) // 8
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if size:
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yield NullBytes(self, "padding", size)
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class Photoshop8BIM(FieldSet):
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TAG_INFO = {
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0x03ed: ("res_info", None, "Resolution information"),
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0x03f3: ("print_flag", None, "Print flags: labels, crop marks, colour bars, etc."),
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0x03f5: ("col_half_info", None, "Colour half-toning information"),
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0x03f8: ("color_trans_func", None, "Colour transfer function"),
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0x0404: ("iptc", IPTC, "IPTC/NAA"),
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0x0406: ("jpeg_qual", None, "JPEG quality"),
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0x0408: ("grid_guide", None, "Grid guides informations"),
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0x040a: ("copyright_flag", None, "Copyright flag"),
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0x040c: ("thumb_res2", None, "Thumbnail resource (2)"),
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0x040d: ("glob_angle", None, "Global lighting angle for effects"),
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0x0411: ("icc_tagged", None, "ICC untagged (1 means intentionally untagged)"),
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0x0414: ("base_layer_id", None, "Base value for new layers ID's"),
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0x0419: ("glob_altitude", None, "Global altitude"),
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0x041a: ("slices", None, "Slices"),
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0x041e: ("url_list", None, "Unicode URL's"),
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0x0421: ("version", Version, "Version information"),
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0x2710: ("print_flag2", None, "Print flags (2)"),
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}
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TAG_NAME = createDict(TAG_INFO, 0)
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CONTENT_HANDLER = createDict(TAG_INFO, 1)
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TAG_DESC = createDict(TAG_INFO, 2)
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def __init__(self, *args, **kw):
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FieldSet.__init__(self, *args, **kw)
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try:
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self._name, self.handler, self._description = self.TAG_INFO[self["tag"].value]
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except KeyError:
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self.handler = None
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size = self["size"]
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self._size = size.address + size.size + alignValue(size.value, 2) * 8
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def createFields(self):
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yield String(self, "signature", 4, "8BIM signature", charset="ASCII")
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if self["signature"].value != "8BIM":
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raise ParserError("Stream doesn't look like 8BIM item (wrong signature)!")
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yield textHandler(UInt16(self, "tag"), hexadecimal)
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if self.stream.readBytes(self.absolute_address + self.current_size, 4) != "\0\0\0\0":
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yield PascalString8(self, "name")
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size = 2 + (self["name"].size // 8) % 2
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yield NullBytes(self, "name_padding", size)
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else:
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yield String(self, "name", 4, strip="\0")
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yield UInt16(self, "size")
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size = alignValue(self["size"].value, 2)
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if not size:
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return
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if self.handler:
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yield self.handler(self, "content", size=size*8)
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else:
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yield RawBytes(self, "content", size)
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class PhotoshopMetadata(FieldSet):
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def createFields(self):
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yield CString(self, "signature", "Photoshop version")
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if self["signature"].value == "Photoshop 3.0":
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while not self.eof:
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yield Photoshop8BIM(self, "item[]")
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else:
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size = (self._size - self.current_size) / 8
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yield RawBytes(self, "rawdata", size)
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