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https://github.com/SickGear/SickGear.git
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191 lines
7.6 KiB
Python
191 lines
7.6 KiB
Python
""" Photoshop metadata parser.
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References:
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- http://www.scribd.com/doc/32900475/Photoshop-File-Formats
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"""
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from hachoir.field import (FieldSet, ParserError,
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UInt8, UInt16, UInt32, Float32, Enum,
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SubFile, String, CString, PascalString8,
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NullBytes, RawBytes)
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from hachoir.core.text_handler import textHandler, hexadecimal
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from hachoir.core.tools import alignValue, createDict
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from hachoir.parser.image.iptc import IPTC
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from hachoir.parser.common.win32 import PascalStringWin32
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BOOL = {0: False, 1: True}
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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 FixedFloat32(FieldSet):
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def createFields(self):
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yield UInt16(self, "int_part")
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yield UInt16(self, "float_part")
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def createValue(self):
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return self["int_part"].value + float(self["float_part"].value) / (1 << 16)
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class ResolutionInfo(FieldSet):
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def createFields(self):
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yield FixedFloat32(self, "horiz_res")
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yield Enum(UInt16(self, "horiz_res_unit"), {1: 'px/in', 2: 'px/cm'})
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yield Enum(UInt16(self, "width_unit"), {1: 'inches', 2: 'cm', 3: 'points', 4: 'picas', 5: 'columns'})
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yield FixedFloat32(self, "vert_res")
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yield Enum(UInt16(self, "vert_res_unit"), {1: 'px/in', 2: 'px/cm'})
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yield Enum(UInt16(self, "height_unit"), {1: 'inches', 2: 'cm', 3: 'points', 4: 'picas', 5: 'columns'})
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class PrintScale(FieldSet):
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def createFields(self):
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yield Enum(UInt16(self, "style"), {0: 'centered', 1: 'size to fit', 2: 'user defined'})
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yield Float32(self, "x_location")
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yield Float32(self, "y_location")
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yield Float32(self, "scale")
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class PrintFlags(FieldSet):
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def createFields(self):
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yield Enum(UInt8(self, "labels"), BOOL)
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yield Enum(UInt8(self, "crop_marks"), BOOL)
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yield Enum(UInt8(self, "color_bars"), BOOL)
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yield Enum(UInt8(self, "reg_marks"), BOOL)
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yield Enum(UInt8(self, "negative"), BOOL)
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yield Enum(UInt8(self, "flip"), BOOL)
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yield Enum(UInt8(self, "interpolate"), BOOL)
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yield Enum(UInt8(self, "caption"), BOOL)
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yield Enum(UInt8(self, "print_flags"), BOOL)
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yield Enum(UInt8(self, "unknown"), BOOL)
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def createValue(self):
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return [field.name for field in self if field.value]
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def createDisplay(self):
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return ', '.join(self.value)
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class PrintFlags2(FieldSet):
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def createFields(self):
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yield UInt16(self, "version")
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yield UInt8(self, "center_crop_marks")
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yield UInt8(self, "reserved")
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yield UInt32(self, "bleed_width")
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yield UInt16(self, "bleed_width_scale")
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class GridGuides(FieldSet):
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def createFields(self):
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yield UInt32(self, "version")
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yield UInt32(self, "horiz_cycle", "Horizontal grid spacing, in quarter inches")
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yield UInt32(self, "vert_cycle", "Vertical grid spacing, in quarter inches")
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yield UInt32(self, "guide_count", "Number of guide resource blocks (can be 0)")
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class Thumbnail(FieldSet):
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def createFields(self):
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yield Enum(UInt32(self, "format"), {0: 'Raw RGB', 1: 'JPEG RGB'})
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yield UInt32(self, "width", "Width of thumbnail in pixels")
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yield UInt32(self, "height", "Height of thumbnail in pixels")
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yield UInt32(self, "widthbytes", "Padded row bytes = (width * bits per pixel + 31) / 32 * 4")
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yield UInt32(self, "uncompressed_size", "Total size = widthbytes * height * planes")
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yield UInt32(self, "compressed_size", "Size after compression. Used for consistency check")
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yield UInt16(self, "bits_per_pixel")
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yield UInt16(self, "num_planes")
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yield SubFile(self, "thumbnail", self['compressed_size'].value, "Thumbnail (JPEG file)", mime_type="image/jpeg")
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class Photoshop8BIM(FieldSet):
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TAG_INFO = {
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0x03ed: ("res_info", ResolutionInfo, "Resolution information"),
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0x03f3: ("print_flag", PrintFlags, "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", GridGuides, "Grid guides informations"),
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0x0409: ("thumb_res", Thumbnail, "Thumbnail resource (PS 4.0)"),
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0x0410: ("watermark", UInt8, "Watermark"),
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0x040a: ("copyright_flag", UInt8, "Copyright flag"),
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0x040b: ("url", None, "URL"),
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0x040c: ("thumb_res2", Thumbnail, "Thumbnail resource (PS 5.0)"),
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0x040d: ("glob_angle", UInt32, "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", UInt32, "Base value for new layers ID's"),
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0x0416: ("indexed_colors", UInt16, "Number of colors in table that are actually defined"),
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0x0417: ("transparency_index", UInt16, "Index of transparent color"),
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0x0419: ("glob_altitude", UInt32, "Global altitude"),
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0x041a: ("slices", None, "Slices"),
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0x041e: ("url_list", None, "Unicode URLs"),
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0x0421: ("version", Version, "Version information"),
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0x0425: ("caption_digest", None, "16-byte MD5 caption digest"),
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0x0426: ("printscale", PrintScale, "Printer scaling"),
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0x2710: ("print_flag2", PrintFlags2, "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[
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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(
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"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) != b"\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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if issubclass(self.handler, FieldSet):
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yield self.handler(self, "content", size=size * 8)
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else:
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yield self.handler(self, "content")
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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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