mirror of
https://github.com/moparisthebest/SickRage
synced 2024-11-06 01:15:05 -05:00
612 lines
23 KiB
Python
612 lines
23 KiB
Python
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"""
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Hachoir parser of Microsoft Windows Metafile (WMF) file format.
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Documentation:
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- Microsoft Windows Metafile; also known as: WMF,
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Enhanced Metafile, EMF, APM
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http://wvware.sourceforge.net/caolan/ora-wmf.html
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- libwmf source code:
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- include/libwmf/defs.h: enums
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- src/player/meta.h: arguments parsers
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- libemf source code
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Author: Victor Stinner
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Creation date: 26 december 2006
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"""
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MAX_FILESIZE = 50 * 1024 * 1024
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from lib.hachoir_parser import Parser
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from lib.hachoir_core.field import (FieldSet, StaticFieldSet, Enum,
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MissingField, ParserError,
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UInt32, Int32, UInt16, Int16, UInt8, NullBytes, RawBytes, String)
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from lib.hachoir_core.endian import LITTLE_ENDIAN
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from lib.hachoir_core.text_handler import textHandler, hexadecimal
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from lib.hachoir_core.tools import createDict
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from lib.hachoir_parser.image.common import RGBA
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POLYFILL_MODE = {1: "Alternate", 2: "Winding"}
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BRUSH_STYLE = {
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0: u"Solid",
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1: u"Null",
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2: u"Hollow",
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3: u"Pattern",
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4: u"Indexed",
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5: u"DIB pattern",
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6: u"DIB pattern point",
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7: u"Pattern 8x8",
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8: u"DIB pattern 8x8",
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}
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HATCH_STYLE = {
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0: u"Horizontal", # -----
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1: u"Vertical", # |||||
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2: u"FDIAGONAL", # \\\\\
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3: u"BDIAGONAL", # /////
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4: u"Cross", # +++++
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5: u"Diagonal cross", # xxxxx
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}
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PEN_STYLE = {
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0: u"Solid",
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1: u"Dash", # -------
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2: u"Dot", # .......
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3: u"Dash dot", # _._._._
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4: u"Dash dot dot", # _.._.._
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5: u"Null",
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6: u"Inside frame",
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7: u"User style",
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8: u"Alternate",
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}
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# Binary raster operations
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ROP2_DESC = {
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1: u"Black (0)",
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2: u"Not merge pen (DPon)",
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3: u"Mask not pen (DPna)",
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4: u"Not copy pen (PN)",
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5: u"Mask pen not (PDna)",
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6: u"Not (Dn)",
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7: u"Xor pen (DPx)",
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8: u"Not mask pen (DPan)",
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9: u"Mask pen (DPa)",
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10: u"Not xor pen (DPxn)",
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11: u"No operation (D)",
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12: u"Merge not pen (DPno)",
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13: u"Copy pen (P)",
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14: u"Merge pen not (PDno)",
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15: u"Merge pen (DPo)",
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16: u"White (1)",
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}
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def parseXY(parser):
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yield Int16(parser, "x")
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yield Int16(parser, "y")
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def parseCreateBrushIndirect(parser):
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yield Enum(UInt16(parser, "brush_style"), BRUSH_STYLE)
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yield RGBA(parser, "color")
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yield Enum(UInt16(parser, "brush_hatch"), HATCH_STYLE)
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def parsePenIndirect(parser):
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yield Enum(UInt16(parser, "pen_style"), PEN_STYLE)
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yield UInt16(parser, "pen_width")
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yield UInt16(parser, "pen_height")
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yield RGBA(parser, "color")
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def parsePolyFillMode(parser):
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yield Enum(UInt16(parser, "operation"), POLYFILL_MODE)
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def parseROP2(parser):
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yield Enum(UInt16(parser, "operation"), ROP2_DESC)
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def parseObjectID(parser):
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yield UInt16(parser, "object_id")
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class Point(FieldSet):
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static_size = 32
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def createFields(self):
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yield Int16(self, "x")
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yield Int16(self, "y")
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def createDescription(self):
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return "Point (%s, %s)" % (self["x"].value, self["y"].value)
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def parsePolygon(parser):
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yield UInt16(parser, "count")
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for index in xrange(parser["count"].value):
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yield Point(parser, "point[]")
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META = {
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0x0000: ("EOF", u"End of file", None),
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0x001E: ("SAVEDC", u"Save device context", None),
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0x0035: ("REALIZEPALETTE", u"Realize palette", None),
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0x0037: ("SETPALENTRIES", u"Set palette entries", None),
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0x00f7: ("CREATEPALETTE", u"Create palette", None),
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0x0102: ("SETBKMODE", u"Set background mode", None),
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0x0103: ("SETMAPMODE", u"Set mapping mode", None),
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0x0104: ("SETROP2", u"Set foreground mix mode", parseROP2),
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0x0106: ("SETPOLYFILLMODE", u"Set polygon fill mode", parsePolyFillMode),
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0x0107: ("SETSTRETCHBLTMODE", u"Set bitmap streching mode", None),
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0x0108: ("SETTEXTCHAREXTRA", u"Set text character extra", None),
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0x0127: ("RESTOREDC", u"Restore device context", None),
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0x012A: ("INVERTREGION", u"Invert region", None),
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0x012B: ("PAINTREGION", u"Paint region", None),
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0x012C: ("SELECTCLIPREGION", u"Select clipping region", None),
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0x012D: ("SELECTOBJECT", u"Select object", parseObjectID),
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0x012E: ("SETTEXTALIGN", u"Set text alignment", None),
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0x0142: ("CREATEDIBPATTERNBRUSH", u"Create DIB brush with specified pattern", None),
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0x01f0: ("DELETEOBJECT", u"Delete object", parseObjectID),
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0x0201: ("SETBKCOLOR", u"Set background color", None),
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0x0209: ("SETTEXTCOLOR", u"Set text color", None),
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0x020A: ("SETTEXTJUSTIFICATION", u"Set text justification", None),
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0x020B: ("SETWINDOWORG", u"Set window origin", parseXY),
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0x020C: ("SETWINDOWEXT", u"Set window extends", parseXY),
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0x020D: ("SETVIEWPORTORG", u"Set view port origin", None),
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0x020E: ("SETVIEWPORTEXT", u"Set view port extends", None),
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0x020F: ("OFFSETWINDOWORG", u"Offset window origin", None),
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0x0211: ("OFFSETVIEWPORTORG", u"Offset view port origin", None),
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0x0213: ("LINETO", u"Draw a line to", None),
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0x0214: ("MOVETO", u"Move to", None),
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0x0220: ("OFFSETCLIPRGN", u"Offset clipping rectangle", None),
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0x0228: ("FILLREGION", u"Fill region", None),
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0x0231: ("SETMAPPERFLAGS", u"Set mapper flags", None),
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0x0234: ("SELECTPALETTE", u"Select palette", None),
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0x02FB: ("CREATEFONTINDIRECT", u"Create font indirect", None),
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0x02FA: ("CREATEPENINDIRECT", u"Create pen indirect", parsePenIndirect),
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0x02FC: ("CREATEBRUSHINDIRECT", u"Create brush indirect", parseCreateBrushIndirect),
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0x0324: ("POLYGON", u"Draw a polygon", parsePolygon),
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0x0325: ("POLYLINE", u"Draw a polyline", None),
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0x0410: ("SCALEWINDOWEXT", u"Scale window extends", None),
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0x0412: ("SCALEVIEWPORTEXT", u"Scale view port extends", None),
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0x0415: ("EXCLUDECLIPRECT", u"Exclude clipping rectangle", None),
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0x0416: ("INTERSECTCLIPRECT", u"Intersect clipping rectangle", None),
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0x0418: ("ELLIPSE", u"Draw an ellipse", None),
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0x0419: ("FLOODFILL", u"Flood fill", None),
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0x041B: ("RECTANGLE", u"Draw a rectangle", None),
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0x041F: ("SETPIXEL", u"Set pixel", None),
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0x0429: ("FRAMEREGION", u"Fram region", None),
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0x0521: ("TEXTOUT", u"Draw text", None),
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0x0538: ("POLYPOLYGON", u"Draw multiple polygons", None),
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0x0548: ("EXTFLOODFILL", u"Extend flood fill", None),
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0x061C: ("ROUNDRECT", u"Draw a rounded rectangle", None),
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0x061D: ("PATBLT", u"Pattern blitting", None),
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0x0626: ("ESCAPE", u"Escape", None),
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0x06FF: ("CREATEREGION", u"Create region", None),
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0x0817: ("ARC", u"Draw an arc", None),
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0x081A: ("PIE", u"Draw a pie", None),
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0x0830: ("CHORD", u"Draw a chord", None),
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0x0940: ("DIBBITBLT", u"DIB bit blitting", None),
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0x0a32: ("EXTTEXTOUT", u"Draw text (extra)", None),
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0x0b41: ("DIBSTRETCHBLT", u"DIB stretch blitting", None),
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0x0d33: ("SETDIBTODEV", u"Set DIB to device", None),
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0x0f43: ("STRETCHDIB", u"Stretch DIB", None),
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}
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META_NAME = createDict(META, 0)
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META_DESC = createDict(META, 1)
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#----------------------------------------------------------------------------
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# EMF constants
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# EMF mapping modes
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EMF_MAPPING_MODE = {
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1: "TEXT",
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2: "LOMETRIC",
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3: "HIMETRIC",
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4: "LOENGLISH",
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5: "HIENGLISH",
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6: "TWIPS",
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7: "ISOTROPIC",
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8: "ANISOTROPIC",
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}
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#----------------------------------------------------------------------------
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# EMF parser
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def parseEmfMappingMode(parser):
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yield Enum(Int32(parser, "mapping_mode"), EMF_MAPPING_MODE)
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def parseXY32(parser):
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yield Int32(parser, "x")
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yield Int32(parser, "y")
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def parseObjectID32(parser):
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yield textHandler(UInt32(parser, "object_id"), hexadecimal)
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def parseBrushIndirect(parser):
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yield UInt32(parser, "ihBrush")
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yield UInt32(parser, "style")
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yield RGBA(parser, "color")
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yield Int32(parser, "hatch")
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class Point16(FieldSet):
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static_size = 32
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def createFields(self):
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yield Int16(self, "x")
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yield Int16(self, "y")
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def createDescription(self):
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return "Point16: (%i,%i)" % (self["x"].value, self["y"].value)
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def parsePoint16array(parser):
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yield RECT32(parser, "bounds")
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yield UInt32(parser, "count")
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for index in xrange(parser["count"].value):
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yield Point16(parser, "point[]")
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def parseGDIComment(parser):
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yield UInt32(parser, "data_size")
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size = parser["data_size"].value
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if size:
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yield RawBytes(parser, "data", size)
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def parseICMMode(parser):
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yield UInt32(parser, "icm_mode")
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def parseExtCreatePen(parser):
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yield UInt32(parser, "ihPen")
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yield UInt32(parser, "offBmi")
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yield UInt32(parser, "cbBmi")
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yield UInt32(parser, "offBits")
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yield UInt32(parser, "cbBits")
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yield UInt32(parser, "pen_style")
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yield UInt32(parser, "width")
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yield UInt32(parser, "brush_style")
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yield RGBA(parser, "color")
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yield UInt32(parser, "hatch")
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yield UInt32(parser, "nb_style")
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for index in xrange(parser["nb_style"].value):
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yield UInt32(parser, "style")
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EMF_META = {
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1: ("HEADER", u"Header", None),
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2: ("POLYBEZIER", u"Draw poly bezier", None),
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3: ("POLYGON", u"Draw polygon", None),
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4: ("POLYLINE", u"Draw polyline", None),
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5: ("POLYBEZIERTO", u"Draw poly bezier to", None),
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6: ("POLYLINETO", u"Draw poly line to", None),
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7: ("POLYPOLYLINE", u"Draw poly polyline", None),
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8: ("POLYPOLYGON", u"Draw poly polygon", None),
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9: ("SETWINDOWEXTEX", u"Set window extend EX", parseXY32),
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10: ("SETWINDOWORGEX", u"Set window origin EX", parseXY32),
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11: ("SETVIEWPORTEXTEX", u"Set viewport extend EX", parseXY32),
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12: ("SETVIEWPORTORGEX", u"Set viewport origin EX", parseXY32),
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13: ("SETBRUSHORGEX", u"Set brush org EX", None),
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14: ("EOF", u"End of file", None),
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15: ("SETPIXELV", u"Set pixel V", None),
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16: ("SETMAPPERFLAGS", u"Set mapper flags", None),
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17: ("SETMAPMODE", u"Set mapping mode", parseEmfMappingMode),
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18: ("SETBKMODE", u"Set background mode", None),
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19: ("SETPOLYFILLMODE", u"Set polyfill mode", None),
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20: ("SETROP2", u"Set ROP2", None),
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21: ("SETSTRETCHBLTMODE", u"Set stretching blitting mode", None),
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22: ("SETTEXTALIGN", u"Set text align", None),
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23: ("SETCOLORADJUSTMENT", u"Set color adjustment", None),
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24: ("SETTEXTCOLOR", u"Set text color", None),
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25: ("SETBKCOLOR", u"Set background color", None),
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26: ("OFFSETCLIPRGN", u"Offset clipping region", None),
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27: ("MOVETOEX", u"Move to EX", parseXY32),
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28: ("SETMETARGN", u"Set meta region", None),
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29: ("EXCLUDECLIPRECT", u"Exclude clipping rectangle", None),
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30: ("INTERSECTCLIPRECT", u"Intersect clipping rectangle", None),
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31: ("SCALEVIEWPORTEXTEX", u"Scale viewport extend EX", None),
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32: ("SCALEWINDOWEXTEX", u"Scale window extend EX", None),
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33: ("SAVEDC", u"Save device context", None),
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34: ("RESTOREDC", u"Restore device context", None),
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35: ("SETWORLDTRANSFORM", u"Set world transform", None),
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36: ("MODIFYWORLDTRANSFORM", u"Modify world transform", None),
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37: ("SELECTOBJECT", u"Select object", parseObjectID32),
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38: ("CREATEPEN", u"Create pen", None),
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39: ("CREATEBRUSHINDIRECT", u"Create brush indirect", parseBrushIndirect),
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40: ("DELETEOBJECT", u"Delete object", parseObjectID32),
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41: ("ANGLEARC", u"Draw angle arc", None),
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42: ("ELLIPSE", u"Draw ellipse", None),
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43: ("RECTANGLE", u"Draw rectangle", None),
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44: ("ROUNDRECT", u"Draw rounded rectangle", None),
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45: ("ARC", u"Draw arc", None),
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46: ("CHORD", u"Draw chord", None),
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47: ("PIE", u"Draw pie", None),
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48: ("SELECTPALETTE", u"Select palette", None),
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49: ("CREATEPALETTE", u"Create palette", None),
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50: ("SETPALETTEENTRIES", u"Set palette entries", None),
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51: ("RESIZEPALETTE", u"Resize palette", None),
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52: ("REALIZEPALETTE", u"Realize palette", None),
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53: ("EXTFLOODFILL", u"EXT flood fill", None),
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54: ("LINETO", u"Draw line to", parseXY32),
|
||
|
|
55: ("ARCTO", u"Draw arc to", None),
|
||
|
|
56: ("POLYDRAW", u"Draw poly draw", None),
|
||
|
|
57: ("SETARCDIRECTION", u"Set arc direction", None),
|
||
|
|
58: ("SETMITERLIMIT", u"Set miter limit", None),
|
||
|
|
59: ("BEGINPATH", u"Begin path", None),
|
||
|
|
60: ("ENDPATH", u"End path", None),
|
||
|
|
61: ("CLOSEFIGURE", u"Close figure", None),
|
||
|
|
62: ("FILLPATH", u"Fill path", None),
|
||
|
|
63: ("STROKEANDFILLPATH", u"Stroke and fill path", None),
|
||
|
|
64: ("STROKEPATH", u"Stroke path", None),
|
||
|
|
65: ("FLATTENPATH", u"Flatten path", None),
|
||
|
|
66: ("WIDENPATH", u"Widen path", None),
|
||
|
|
67: ("SELECTCLIPPATH", u"Select clipping path", None),
|
||
|
|
68: ("ABORTPATH", u"Arbort path", None),
|
||
|
|
70: ("GDICOMMENT", u"GDI comment", parseGDIComment),
|
||
|
|
71: ("FILLRGN", u"Fill region", None),
|
||
|
|
72: ("FRAMERGN", u"Frame region", None),
|
||
|
|
73: ("INVERTRGN", u"Invert region", None),
|
||
|
|
74: ("PAINTRGN", u"Paint region", None),
|
||
|
|
75: ("EXTSELECTCLIPRGN", u"EXT select clipping region", None),
|
||
|
|
76: ("BITBLT", u"Bit blitting", None),
|
||
|
|
77: ("STRETCHBLT", u"Stretch blitting", None),
|
||
|
|
78: ("MASKBLT", u"Mask blitting", None),
|
||
|
|
79: ("PLGBLT", u"PLG blitting", None),
|
||
|
|
80: ("SETDIBITSTODEVICE", u"Set DIB bits to device", None),
|
||
|
|
81: ("STRETCHDIBITS", u"Stretch DIB bits", None),
|
||
|
|
82: ("EXTCREATEFONTINDIRECTW", u"EXT create font indirect W", None),
|
||
|
|
83: ("EXTTEXTOUTA", u"EXT text out A", None),
|
||
|
|
84: ("EXTTEXTOUTW", u"EXT text out W", None),
|
||
|
|
85: ("POLYBEZIER16", u"Draw poly bezier (16-bit)", None),
|
||
|
|
86: ("POLYGON16", u"Draw polygon (16-bit)", parsePoint16array),
|
||
|
|
87: ("POLYLINE16", u"Draw polyline (16-bit)", parsePoint16array),
|
||
|
|
88: ("POLYBEZIERTO16", u"Draw poly bezier to (16-bit)", parsePoint16array),
|
||
|
|
89: ("POLYLINETO16", u"Draw polyline to (16-bit)", parsePoint16array),
|
||
|
|
90: ("POLYPOLYLINE16", u"Draw poly polyline (16-bit)", None),
|
||
|
|
91: ("POLYPOLYGON16", u"Draw poly polygon (16-bit)", parsePoint16array),
|
||
|
|
92: ("POLYDRAW16", u"Draw poly draw (16-bit)", None),
|
||
|
|
93: ("CREATEMONOBRUSH", u"Create monobrush", None),
|
||
|
|
94: ("CREATEDIBPATTERNBRUSHPT", u"Create DIB pattern brush PT", None),
|
||
|
|
95: ("EXTCREATEPEN", u"EXT create pen", parseExtCreatePen),
|
||
|
|
96: ("POLYTEXTOUTA", u"Poly text out A", None),
|
||
|
|
97: ("POLYTEXTOUTW", u"Poly text out W", None),
|
||
|
|
98: ("SETICMMODE", u"Set ICM mode", parseICMMode),
|
||
|
|
99: ("CREATECOLORSPACE", u"Create color space", None),
|
||
|
|
100: ("SETCOLORSPACE", u"Set color space", None),
|
||
|
|
101: ("DELETECOLORSPACE", u"Delete color space", None),
|
||
|
|
102: ("GLSRECORD", u"GLS record", None),
|
||
|
|
103: ("GLSBOUNDEDRECORD", u"GLS bound ED record", None),
|
||
|
|
104: ("PIXELFORMAT", u"Pixel format", None),
|
||
|
|
}
|
||
|
|
EMF_META_NAME = createDict(EMF_META, 0)
|
||
|
|
EMF_META_DESC = createDict(EMF_META, 1)
|
||
|
|
|
||
|
|
class Function(FieldSet):
|
||
|
|
def __init__(self, *args):
|
||
|
|
FieldSet.__init__(self, *args)
|
||
|
|
if self.root.isEMF():
|
||
|
|
self._size = self["size"].value * 8
|
||
|
|
else:
|
||
|
|
self._size = self["size"].value * 16
|
||
|
|
|
||
|
|
def createFields(self):
|
||
|
|
if self.root.isEMF():
|
||
|
|
yield Enum(UInt32(self, "function"), EMF_META_NAME)
|
||
|
|
yield UInt32(self, "size")
|
||
|
|
try:
|
||
|
|
parser = EMF_META[self["function"].value][2]
|
||
|
|
except KeyError:
|
||
|
|
parser = None
|
||
|
|
else:
|
||
|
|
yield UInt32(self, "size")
|
||
|
|
yield Enum(UInt16(self, "function"), META_NAME)
|
||
|
|
try:
|
||
|
|
parser = META[self["function"].value][2]
|
||
|
|
except KeyError:
|
||
|
|
parser = None
|
||
|
|
if parser:
|
||
|
|
for field in parser(self):
|
||
|
|
yield field
|
||
|
|
else:
|
||
|
|
size = (self.size - self.current_size) // 8
|
||
|
|
if size:
|
||
|
|
yield RawBytes(self, "data", size)
|
||
|
|
|
||
|
|
def isValid(self):
|
||
|
|
func = self["function"]
|
||
|
|
return func.value in func.getEnum()
|
||
|
|
|
||
|
|
def createDescription(self):
|
||
|
|
if self.root.isEMF():
|
||
|
|
return EMF_META_DESC[self["function"].value]
|
||
|
|
try:
|
||
|
|
return META_DESC[self["function"].value]
|
||
|
|
except KeyError:
|
||
|
|
return "Function %s" % self["function"].display
|
||
|
|
|
||
|
|
class RECT16(StaticFieldSet):
|
||
|
|
format = (
|
||
|
|
(Int16, "left"),
|
||
|
|
(Int16, "top"),
|
||
|
|
(Int16, "right"),
|
||
|
|
(Int16, "bottom"),
|
||
|
|
)
|
||
|
|
def createDescription(self):
|
||
|
|
return "%s: %ux%u at (%u,%u)" % (
|
||
|
|
self.__class__.__name__,
|
||
|
|
self["right"].value-self["left"].value,
|
||
|
|
self["bottom"].value-self["top"].value,
|
||
|
|
self["left"].value,
|
||
|
|
self["top"].value)
|
||
|
|
|
||
|
|
class RECT32(RECT16):
|
||
|
|
format = (
|
||
|
|
(Int32, "left"),
|
||
|
|
(Int32, "top"),
|
||
|
|
(Int32, "right"),
|
||
|
|
(Int32, "bottom"),
|
||
|
|
)
|
||
|
|
|
||
|
|
class PlaceableHeader(FieldSet):
|
||
|
|
"""
|
||
|
|
Header of Placeable Metafile (file extension .APM),
|
||
|
|
created by Aldus Corporation
|
||
|
|
"""
|
||
|
|
MAGIC = "\xD7\xCD\xC6\x9A\0\0" # (magic, handle=0x0000)
|
||
|
|
|
||
|
|
def createFields(self):
|
||
|
|
yield textHandler(UInt32(self, "signature", "Placeable Metafiles signature (0x9AC6CDD7)"), hexadecimal)
|
||
|
|
yield UInt16(self, "handle")
|
||
|
|
yield RECT16(self, "rect")
|
||
|
|
yield UInt16(self, "inch")
|
||
|
|
yield NullBytes(self, "reserved", 4)
|
||
|
|
yield textHandler(UInt16(self, "checksum"), hexadecimal)
|
||
|
|
|
||
|
|
class EMF_Header(FieldSet):
|
||
|
|
MAGIC = "\x20\x45\x4D\x46\0\0" # (magic, min_ver=0x0000)
|
||
|
|
def __init__(self, *args):
|
||
|
|
FieldSet.__init__(self, *args)
|
||
|
|
self._size = self["size"].value * 8
|
||
|
|
|
||
|
|
def createFields(self):
|
||
|
|
LONG = Int32
|
||
|
|
yield UInt32(self, "type", "Record type (always 1)")
|
||
|
|
yield UInt32(self, "size", "Size of the header in bytes")
|
||
|
|
yield RECT32(self, "Bounds", "Inclusive bounds")
|
||
|
|
yield RECT32(self, "Frame", "Inclusive picture frame")
|
||
|
|
yield textHandler(UInt32(self, "signature", "Signature ID (always 0x464D4520)"), hexadecimal)
|
||
|
|
yield UInt16(self, "min_ver", "Minor version")
|
||
|
|
yield UInt16(self, "maj_ver", "Major version")
|
||
|
|
yield UInt32(self, "file_size", "Size of the file in bytes")
|
||
|
|
yield UInt32(self, "NumOfRecords", "Number of records in the metafile")
|
||
|
|
yield UInt16(self, "NumOfHandles", "Number of handles in the handle table")
|
||
|
|
yield NullBytes(self, "reserved", 2)
|
||
|
|
yield UInt32(self, "desc_size", "Size of description in 16-bit words")
|
||
|
|
yield UInt32(self, "desc_ofst", "Offset of description string in metafile")
|
||
|
|
yield UInt32(self, "nb_colors", "Number of color palette entries")
|
||
|
|
yield LONG(self, "width_px", "Width of reference device in pixels")
|
||
|
|
yield LONG(self, "height_px", "Height of reference device in pixels")
|
||
|
|
yield LONG(self, "width_mm", "Width of reference device in millimeters")
|
||
|
|
yield LONG(self, "height_mm", "Height of reference device in millimeters")
|
||
|
|
|
||
|
|
# Read description (if any)
|
||
|
|
offset = self["desc_ofst"].value
|
||
|
|
current = (self.absolute_address + self.current_size) // 8
|
||
|
|
size = self["desc_size"].value * 2
|
||
|
|
if offset == current and size:
|
||
|
|
yield String(self, "description", size, charset="UTF-16-LE", strip="\0 ")
|
||
|
|
|
||
|
|
# Read padding (if any)
|
||
|
|
size = self["size"].value - self.current_size//8
|
||
|
|
if size:
|
||
|
|
yield RawBytes(self, "padding", size)
|
||
|
|
|
||
|
|
class WMF_File(Parser):
|
||
|
|
PARSER_TAGS = {
|
||
|
|
"id": "wmf",
|
||
|
|
"category": "image",
|
||
|
|
"file_ext": ("wmf", "apm", "emf"),
|
||
|
|
"mime": (
|
||
|
|
u"image/wmf", u"image/x-wmf", u"image/x-win-metafile",
|
||
|
|
u"application/x-msmetafile", u"application/wmf", u"application/x-wmf",
|
||
|
|
u"image/x-emf"),
|
||
|
|
"magic": (
|
||
|
|
(PlaceableHeader.MAGIC, 0),
|
||
|
|
(EMF_Header.MAGIC, 40*8),
|
||
|
|
# WMF: file_type=memory, header size=9, version=3.0
|
||
|
|
("\0\0\x09\0\0\3", 0),
|
||
|
|
# WMF: file_type=disk, header size=9, version=3.0
|
||
|
|
("\1\0\x09\0\0\3", 0),
|
||
|
|
),
|
||
|
|
"min_size": 40*8,
|
||
|
|
"description": u"Microsoft Windows Metafile (WMF)",
|
||
|
|
}
|
||
|
|
endian = LITTLE_ENDIAN
|
||
|
|
FILE_TYPE = {0: "memory", 1: "disk"}
|
||
|
|
|
||
|
|
def validate(self):
|
||
|
|
if self.isEMF():
|
||
|
|
# Check EMF header
|
||
|
|
emf = self["emf_header"]
|
||
|
|
if emf["signature"].value != 0x464D4520:
|
||
|
|
return "Invalid signature"
|
||
|
|
if emf["type"].value != 1:
|
||
|
|
return "Invalid record type"
|
||
|
|
if emf["reserved"].value != "\0\0":
|
||
|
|
return "Invalid reserved"
|
||
|
|
else:
|
||
|
|
# Check AMF header
|
||
|
|
if self.isAPM():
|
||
|
|
amf = self["amf_header"]
|
||
|
|
if amf["handle"].value != 0:
|
||
|
|
return "Invalid handle"
|
||
|
|
if amf["reserved"].value != "\0\0\0\0":
|
||
|
|
return "Invalid reserved"
|
||
|
|
|
||
|
|
# Check common header
|
||
|
|
if self["file_type"].value not in (0, 1):
|
||
|
|
return "Invalid file type"
|
||
|
|
if self["header_size"].value != 9:
|
||
|
|
return "Invalid header size"
|
||
|
|
if self["nb_params"].value != 0:
|
||
|
|
return "Invalid number of parameters"
|
||
|
|
|
||
|
|
# Check first functions
|
||
|
|
for index in xrange(5):
|
||
|
|
try:
|
||
|
|
func = self["func[%u]" % index]
|
||
|
|
except MissingField:
|
||
|
|
if self.done:
|
||
|
|
return True
|
||
|
|
return "Unable to get function #%u" % index
|
||
|
|
except ParserError:
|
||
|
|
return "Unable to create function #%u" % index
|
||
|
|
|
||
|
|
# Check first frame values
|
||
|
|
if not func.isValid():
|
||
|
|
return "Function #%u is invalid" % index
|
||
|
|
return True
|
||
|
|
|
||
|
|
def createFields(self):
|
||
|
|
if self.isEMF():
|
||
|
|
yield EMF_Header(self, "emf_header")
|
||
|
|
else:
|
||
|
|
if self.isAPM():
|
||
|
|
yield PlaceableHeader(self, "amf_header")
|
||
|
|
yield Enum(UInt16(self, "file_type"), self.FILE_TYPE)
|
||
|
|
yield UInt16(self, "header_size", "Size of header in 16-bit words (always 9)")
|
||
|
|
yield UInt8(self, "win_ver_min", "Minor version of Microsoft Windows")
|
||
|
|
yield UInt8(self, "win_ver_maj", "Major version of Microsoft Windows")
|
||
|
|
yield UInt32(self, "file_size", "Total size of the metafile in 16-bit words")
|
||
|
|
yield UInt16(self, "nb_obj", "Number of objects in the file")
|
||
|
|
yield UInt32(self, "max_record_size", "The size of largest record in 16-bit words")
|
||
|
|
yield UInt16(self, "nb_params", "Not Used (always 0)")
|
||
|
|
|
||
|
|
while not(self.eof):
|
||
|
|
yield Function(self, "func[]")
|
||
|
|
|
||
|
|
def isEMF(self):
|
||
|
|
"""File is in EMF format?"""
|
||
|
|
if 1 <= self.current_length:
|
||
|
|
return self[0].name == "emf_header"
|
||
|
|
if self.size < 44*8:
|
||
|
|
return False
|
||
|
|
magic = EMF_Header.MAGIC
|
||
|
|
return self.stream.readBytes(40*8, len(magic)) == magic
|
||
|
|
|
||
|
|
def isAPM(self):
|
||
|
|
"""File is in Aldus Placeable Metafiles format?"""
|
||
|
|
if 1 <= self.current_length:
|
||
|
|
return self[0].name == "amf_header"
|
||
|
|
else:
|
||
|
|
magic = PlaceableHeader.MAGIC
|
||
|
|
return (self.stream.readBytes(0, len(magic)) == magic)
|
||
|
|
|
||
|
|
def createDescription(self):
|
||
|
|
if self.isEMF():
|
||
|
|
return u"Microsoft Enhanced Metafile (EMF) picture"
|
||
|
|
elif self.isAPM():
|
||
|
|
return u"Aldus Placeable Metafile (APM) picture"
|
||
|
|
else:
|
||
|
|
return u"Microsoft Windows Metafile (WMF) picture"
|
||
|
|
|
||
|
|
def createMimeType(self):
|
||
|
|
if self.isEMF():
|
||
|
|
return u"image/x-emf"
|
||
|
|
else:
|
||
|
|
return u"image/wmf"
|
||
|
|
|
||
|
|
def createContentSize(self):
|
||
|
|
if self.isEMF():
|
||
|
|
return None
|
||
|
|
start = self["func[0]"].absolute_address
|
||
|
|
end = self.stream.searchBytes("\3\0\0\0\0\0", start, MAX_FILESIZE * 8)
|
||
|
|
if end is not None:
|
||
|
|
return end + 6*8
|
||
|
|
return None
|
||
|
|
|