コード例 #1
0
    def _open_index(self, index=1):
        #
        # get the Image Contents Property Set

        prop = self.ole.getproperties([
            "Data Object Store %06d" % index,
            "\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:
            raise IOError("invalid number of bands")
        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]

        # print len(self.jpeg), "tables loaded"

        self._open_subimage(1, self.maxid)
コード例 #2
0
ファイル: FpxImagePlugin.py プロジェクト: AmeraHelmi/Online
    def _open_index(self, index=1):
        #
        # get the Image Contents Property Set

        prop = self.ole.getproperties([
            "Data Object Store %06d" % index,
            "\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 = []
        for i in range(i32(s, 4)):
            # 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]

        # print len(self.jpeg), "tables loaded"

        self._open_subimage(1, self.maxid)
コード例 #3
0
    def _open_subimage(self, index=1, subimage=0):
        #
        # setup tile descriptors for a given subimage

        stream = [
            "Data Object Store %06d" % index,
            "Resolution %04d" % subimage, "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)

        # print(size, self.mode, self.rawmode)

        if size != self.size:
            raise IOError("subimage mismatch")

        # 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):

            compression = i32(s, i + 8)

            if compression == 0:
                self.tile.append(("raw", (x, y, x + xtile, y + ytile),
                                  i32(s, i) + 28, (self.rawmode)))

            elif compression == 1:

                # FIXME: the fill decoder is not implemented
                self.tile.append(("fill", (x, y, x + xtile, y + ytile),
                                  i32(s, i) + 28, (self.rawmode, s[12:16])))

            elif compression == 2:

                internal_color_conversion = i8(s[14])
                jpeg_tables = i8(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, x + xtile, y + ytile),
                                  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:
                raise IOError("unknown/invalid compression")

            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
コード例 #4
0
ファイル: FpxImagePlugin.py プロジェクト: AmeraHelmi/Online
    def _open_subimage(self, index=1, subimage=0):
        #
        # setup tile descriptors for a given subimage

        stream = [
            "Data Object Store %06d" % index,
            "Resolution %04d" % subimage,
            "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)

        # print size, self.mode, self.rawmode

        if size != self.size:
            raise IOError("subimage mismatch")

        # 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):

            compression = i32(s, i+8)

            if compression == 0:
                self.tile.append(("raw", (x, y, x+xtile, y+ytile),
                                 i32(s, i) + 28, (self.rawmode)))

            elif compression == 1:

                # FIXME: the fill decoder is not implemented
                self.tile.append(("fill", (x, y, x+xtile, y+ytile),
                                 i32(s, i) + 28, (self.rawmode, s[12:16])))

            elif compression == 2:

                internal_color_conversion = i8(s[14])
                jpeg_tables = i8(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, x+xtile, y+ytile),
                                 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:
                raise IOError("unknown/invalid compression")

            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