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Python OleFileIO.openstream方法代码示例

本文整理汇总了Python中OleFileIO.openstream方法的典型用法代码示例。如果您正苦于以下问题:Python OleFileIO.openstream方法的具体用法?Python OleFileIO.openstream怎么用?Python OleFileIO.openstream使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在OleFileIO的用法示例。


在下文中一共展示了OleFileIO.openstream方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。

示例1: MicImageFile

# 需要导入模块: import OleFileIO [as 别名]
# 或者: from OleFileIO import openstream [as 别名]
class MicImageFile(TiffImagePlugin.TiffImageFile):

    format = "MIC"
    format_description = "Microsoft Image Composer"

    def _open(self):

        # read the OLE directory and see if this is a likely
        # to be a Microsoft Image Composer file

        try:
            self.ole = OleFileIO(self.fp)
        except IOError:
            raise SyntaxError, "not an MIC file; invalid OLE file"

        # find ACI subfiles with Image members (maybe not the
        # best way to identify MIC files, but what the... ;-)

        self.images = []
        for file in self.ole.listdir():
            if file[1:] and file[0][-4:] == ".ACI" and file[1] == "Image":
                self.images.append(file)

        # if we didn't find any images, this is probably not
        # an MIC file.
        if not self.images:
            raise SyntaxError, "not an MIC file; no image entries"

        self.__fp = self.fp
        self.frame = 0

        if len(self.images) > 1:
            self.category = Image.CONTAINER

        self.seek(0)

    def seek(self, frame):

        try:
            filename = self.images[frame]
        except IndexError:
            raise EOFError, "no such frame"

        self.fp = self.ole.openstream(filename)

        TiffImagePlugin.TiffImageFile._open(self)

        self.frame = frame

    def tell(self):

        return self.frame
开发者ID:py-web,项目名称:ibrouteur,代码行数:54,代码来源:MicImagePlugin.py

示例2: FpxImageFile

# 需要导入模块: import OleFileIO [as 别名]
# 或者: from OleFileIO import openstream [as 别名]
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 = OleFileIO(self.fp)
        except IOError:
            raise SyntaxError, "not an FPX file; invalid OLE file"

        if self.ole.root.clsid != "56616700-C154-11CE-8553-00AA00A1F95B":
            raise SyntaxError, "not an FPX file; bad root CLSID"

        self._open_index(1)

    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 = 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 prop.has_key(id):
                self.jpeg[i] = prop[id]

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

        self._open_subimage(1, self.maxid)

    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
        p = 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)
#.........这里部分代码省略.........
开发者ID:StGerGer,项目名称:AutoMetronome,代码行数:103,代码来源:FpxImagePlugin.py


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