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| # | |
| # THIS IS WORK IN PROGRESS | |
| # | |
| # The Python Imaging Library. | |
| # $Id$ | |
| # | |
| # FlashPix support for PIL | |
| # | |
| # History: | |
| # 97-01-25 fl Created (reads uncompressed RGB images only) | |
| # | |
| # Copyright (c) Secret Labs AB 1997. | |
| # Copyright (c) Fredrik Lundh 1997. | |
| # | |
| # See the README file for information on usage and redistribution. | |
| # | |
| import olefile | |
| from . import Image, ImageFile | |
| from ._binary import i32le as i32 | |
| # we map from colour field tuples to (mode, rawmode) descriptors | |
| MODES = { | |
| # opacity | |
| (0x00007FFE,): ("A", "L"), | |
| # monochrome | |
| (0x00010000,): ("L", "L"), | |
| (0x00018000, 0x00017FFE): ("RGBA", "LA"), | |
| # photo YCC | |
| (0x00020000, 0x00020001, 0x00020002): ("RGB", "YCC;P"), | |
| (0x00028000, 0x00028001, 0x00028002, 0x00027FFE): ("RGBA", "YCCA;P"), | |
| # standard RGB (NIFRGB) | |
| (0x00030000, 0x00030001, 0x00030002): ("RGB", "RGB"), | |
| (0x00038000, 0x00038001, 0x00038002, 0x00037FFE): ("RGBA", "RGBA"), | |
| } | |
| # | |
| # -------------------------------------------------------------------- | |
| def _accept(prefix): | |
| return prefix[:8] == olefile.MAGIC | |
| ## | |
| # Image plugin for the FlashPix images. | |
| class FpxImageFile(ImageFile.ImageFile): | |
| format = "FPX" | |
| format_description = "FlashPix" | |
| def _open(self): | |
| # | |
| # read the OLE directory and see if this is a likely | |
| # to be a FlashPix file | |
| try: | |
| self.ole = olefile.OleFileIO(self.fp) | |
| except OSError as e: | |
| msg = "not an FPX file; invalid OLE file" | |
| raise SyntaxError(msg) from e | |
| if self.ole.root.clsid != "56616700-C154-11CE-8553-00AA00A1F95B": | |
| msg = "not an FPX file; bad root CLSID" | |
| raise SyntaxError(msg) | |
| self._open_index(1) | |
| def _open_index(self, index=1): | |
| # | |
| # get the Image Contents Property Set | |
| prop = self.ole.getproperties( | |
| [f"Data Object Store {index:06d}", "\005Image Contents"] | |
| ) | |
| # size (highest resolution) | |
| self._size = prop[0x1000002], prop[0x1000003] | |
| size = max(self.size) | |
| i = 1 | |
| while size > 64: | |
| size = size / 2 | |
| i += 1 | |
| self.maxid = i - 1 | |
| # mode. instead of using a single field for this, flashpix | |
| # requires you to specify the mode for each channel in each | |
| # resolution subimage, and leaves it to the decoder to make | |
| # sure that they all match. for now, we'll cheat and assume | |
| # that this is always the case. | |
| id = self.maxid << 16 | |
| s = prop[0x2000002 | id] | |
| colors = [] | |
| bands = i32(s, 4) | |
| if bands > 4: | |
| msg = "Invalid number of bands" | |
| raise OSError(msg) | |
| for i in range(bands): | |
| # note: for now, we ignore the "uncalibrated" flag | |
| colors.append(i32(s, 8 + i * 4) & 0x7FFFFFFF) | |
| self.mode, self.rawmode = MODES[tuple(colors)] | |
| # load JPEG tables, if any | |
| self.jpeg = {} | |
| for i in range(256): | |
| id = 0x3000001 | (i << 16) | |
| if id in prop: | |
| self.jpeg[i] = prop[id] | |
| self._open_subimage(1, self.maxid) | |
| def _open_subimage(self, index=1, subimage=0): | |
| # | |
| # setup tile descriptors for a given subimage | |
| stream = [ | |
| f"Data Object Store {index:06d}", | |
| f"Resolution {subimage:04d}", | |
| "Subimage 0000 Header", | |
| ] | |
| fp = self.ole.openstream(stream) | |
| # skip prefix | |
| fp.read(28) | |
| # header stream | |
| s = fp.read(36) | |
| size = i32(s, 4), i32(s, 8) | |
| # tilecount = i32(s, 12) | |
| tilesize = i32(s, 16), i32(s, 20) | |
| # channels = i32(s, 24) | |
| offset = i32(s, 28) | |
| length = i32(s, 32) | |
| if size != self.size: | |
| msg = "subimage mismatch" | |
| raise OSError(msg) | |
| # get tile descriptors | |
| fp.seek(28 + offset) | |
| s = fp.read(i32(s, 12) * length) | |
| x = y = 0 | |
| xsize, ysize = size | |
| xtile, ytile = tilesize | |
| self.tile = [] | |
| for i in range(0, len(s), length): | |
| x1 = min(xsize, x + xtile) | |
| y1 = min(ysize, y + ytile) | |
| compression = i32(s, i + 8) | |
| if compression == 0: | |
| self.tile.append( | |
| ( | |
| "raw", | |
| (x, y, x1, y1), | |
| i32(s, i) + 28, | |
| (self.rawmode,), | |
| ) | |
| ) | |
| elif compression == 1: | |
| # FIXME: the fill decoder is not implemented | |
| self.tile.append( | |
| ( | |
| "fill", | |
| (x, y, x1, y1), | |
| i32(s, i) + 28, | |
| (self.rawmode, s[12:16]), | |
| ) | |
| ) | |
| elif compression == 2: | |
| internal_color_conversion = s[14] | |
| jpeg_tables = s[15] | |
| rawmode = self.rawmode | |
| if internal_color_conversion: | |
| # The image is stored as usual (usually YCbCr). | |
| if rawmode == "RGBA": | |
| # For "RGBA", data is stored as YCbCrA based on | |
| # negative RGB. The following trick works around | |
| # this problem : | |
| jpegmode, rawmode = "YCbCrK", "CMYK" | |
| else: | |
| jpegmode = None # let the decoder decide | |
| else: | |
| # The image is stored as defined by rawmode | |
| jpegmode = rawmode | |
| self.tile.append( | |
| ( | |
| "jpeg", | |
| (x, y, x1, y1), | |
| i32(s, i) + 28, | |
| (rawmode, jpegmode), | |
| ) | |
| ) | |
| # FIXME: jpeg tables are tile dependent; the prefix | |
| # data must be placed in the tile descriptor itself! | |
| if jpeg_tables: | |
| self.tile_prefix = self.jpeg[jpeg_tables] | |
| else: | |
| msg = "unknown/invalid compression" | |
| raise OSError(msg) | |
| x = x + xtile | |
| if x >= xsize: | |
| x, y = 0, y + ytile | |
| if y >= ysize: | |
| break # isn't really required | |
| self.stream = stream | |
| self.fp = None | |
| def load(self): | |
| if not self.fp: | |
| self.fp = self.ole.openstream(self.stream[:2] + ["Subimage 0000 Data"]) | |
| return ImageFile.ImageFile.load(self) | |
| def close(self): | |
| self.ole.close() | |
| super().close() | |
| def __exit__(self, *args): | |
| self.ole.close() | |
| super().__exit__() | |
| # | |
| # -------------------------------------------------------------------- | |
| Image.register_open(FpxImageFile.format, FpxImageFile, _accept) | |
| Image.register_extension(FpxImageFile.format, ".fpx") | |