Python matplotlib.checkdep_ghostscript方法代碼示例

# 需要導入模塊: import matplotlib [as 別名]
# 或者: from matplotlib import checkdep_ghostscript [as 別名]
def _update_converter():
    gs, gs_v = matplotlib.checkdep_ghostscript()
    if gs_v is not None:
        cmd = lambda old, new: \
            [gs, '-q', '-sDEVICE=png16m', '-dNOPAUSE', '-dBATCH',
             '-sOutputFile=' + new, old]
        converter['pdf'] = make_external_conversion_command(cmd)
        converter['eps'] = make_external_conversion_command(cmd)

    if matplotlib.checkdep_inkscape() is not None:
        cmd = lambda old, new: \
            ['inkscape', '-z', old, '--export-png', new]
        converter['svg'] = make_external_conversion_command(cmd)


#: A dictionary that maps filename extensions to functions which
#: themselves map arguments `old` and `new` (filenames) to a list of strings.
#: The list can then be passed to Popen to convert files with that
#: extension to png format. 

# 需要導入模塊: import matplotlib [as 別名]
# 或者: from matplotlib import checkdep_ghostscript [as 別名]
def get_file_hash(path, block_size=2 ** 20):
    md5 = hashlib.md5()
    with open(path, 'rb') as fd:
        while True:
            data = fd.read(block_size)
            if not data:
                break
            md5.update(data)

    if path.endswith('.pdf'):
        from matplotlib import checkdep_ghostscript
        md5.update(checkdep_ghostscript()[1].encode('utf-8'))
    elif path.endswith('.svg'):
        from matplotlib import checkdep_inkscape
        md5.update(checkdep_inkscape().encode('utf-8'))

    return md5.hexdigest() 

# 需要導入模塊: import matplotlib [as 別名]
# 或者: from matplotlib import checkdep_ghostscript [as 別名]
def _update_converter():
    gs, gs_v = matplotlib.checkdep_ghostscript()
    if gs_v is not None:
        def cmd(old, new):
            return [str(gs), '-q', '-sDEVICE=png16m', '-dNOPAUSE', '-dBATCH',
             '-sOutputFile=' + new, old]
        converter['pdf'] = make_external_conversion_command(cmd)
        converter['eps'] = make_external_conversion_command(cmd)

    if matplotlib.checkdep_inkscape() is not None:
        converter['svg'] = _SVGConverter()


#: A dictionary that maps filename extensions to functions which
#: themselves map arguments `old` and `new` (filenames) to a list of strings.
#: The list can then be passed to Popen to convert files with that
#: extension to png format. 

# 需要導入模塊: import matplotlib [as 別名]
# 或者: from matplotlib import checkdep_ghostscript [as 別名]
def gs_exe(self):
        """
        excutable name of ghostscript.
        """
        try:
            return self._cached["gs_exe"]
        except KeyError:
            pass

        gs_exe, gs_version = checkdep_ghostscript()
        if gs_exe is None:
            gs_exe = 'gs'

        self._cached["gs_exe"] = gs_exe
        return gs_exe 

# 需要導入模塊: import matplotlib [as 別名]
# 或者: from matplotlib import checkdep_ghostscript [as 別名]
def make_pdf_to_png_converter():
    """
    Returns a function that converts a pdf file to a png file.
    """

    tools_available = []
    # check for pdftocairo
    try:
        check_output(["pdftocairo", "-v"], stderr=subprocess.STDOUT)
        tools_available.append("pdftocairo")
    except:
        pass
    # check for ghostscript
    gs, ver = mpl.checkdep_ghostscript()
    if gs:
        tools_available.append("gs")

    # pick converter
    if "pdftocairo" in tools_available:
        def cairo_convert(pdffile, pngfile, dpi):
            cmd = ["pdftocairo", "-singlefile", "-png",
                   "-r %d" % dpi, pdffile, os.path.splitext(pngfile)[0]]
            # for some reason this doesn't work without shell
            check_output(" ".join(cmd), shell=True, stderr=subprocess.STDOUT)
        return cairo_convert
    elif "gs" in tools_available:
        def gs_convert(pdffile, pngfile, dpi):
            cmd = [gs, '-dQUIET', '-dSAFER', '-dBATCH', '-dNOPAUSE', '-dNOPROMPT',
                   '-sDEVICE=png16m', '-dUseCIEColor', '-dTextAlphaBits=4',
                   '-dGraphicsAlphaBits=4', '-dDOINTERPOLATE', '-sOutputFile=%s' % pngfile,
                   '-r%d' % dpi, pdffile]
            check_output(cmd, stderr=subprocess.STDOUT)
        return gs_convert
    else:
        raise RuntimeError("No suitable pdf to png renderer found.") 

# 需要導入模塊: import matplotlib [as 別名]
# 或者: from matplotlib import checkdep_ghostscript [as 別名]
def gs_exe(self):
        """
        executable name of ghostscript.
        """
        try:
            return self._cached["gs_exe"]
        except KeyError:
            pass

        gs_exe, gs_version = checkdep_ghostscript()
        if gs_exe is None:
            gs_exe = 'gs'

        self._cached["gs_exe"] = str(gs_exe)
        return str(gs_exe) 

# 需要導入模塊: import matplotlib [as 別名]
# 或者: from matplotlib import checkdep_ghostscript [as 別名]
def make_pdf_to_png_converter():
    """
    Returns a function that converts a pdf file to a png file.
    """

    tools_available = []
    # check for pdftocairo
    try:
        subprocess.check_output(["pdftocairo", "-v"], stderr=subprocess.STDOUT)
        tools_available.append("pdftocairo")
    except OSError:
        pass
    # check for ghostscript
    gs, ver = mpl.checkdep_ghostscript()
    if gs:
        tools_available.append("gs")

    # pick converter
    if "pdftocairo" in tools_available:
        def cairo_convert(pdffile, pngfile, dpi):
            cmd = ["pdftocairo", "-singlefile", "-png", "-r", "%d" % dpi,
                   pdffile, os.path.splitext(pngfile)[0]]
            subprocess.check_output(cmd, stderr=subprocess.STDOUT)
        return cairo_convert
    elif "gs" in tools_available:
        def gs_convert(pdffile, pngfile, dpi):
            cmd = [gs,
                   '-dQUIET', '-dSAFER', '-dBATCH', '-dNOPAUSE', '-dNOPROMPT',
                   '-dUseCIEColor', '-dTextAlphaBits=4',
                   '-dGraphicsAlphaBits=4', '-dDOINTERPOLATE',
                   '-sDEVICE=png16m', '-sOutputFile=%s' % pngfile,
                   '-r%d' % dpi, pdffile]
            subprocess.check_output(cmd, stderr=subprocess.STDOUT)
        return gs_convert
    else:
        raise RuntimeError("No suitable pdf to png renderer found.") 

# 需要導入模塊: import matplotlib [as 別名]
# 或者: from matplotlib import checkdep_ghostscript [as 別名]
def __call__(self, orig, dest):
        if not self._proc:
            self._stdout = TemporaryFile()
            self._proc = subprocess.Popen(
                [matplotlib.checkdep_ghostscript.executable,
                 "-dNOPAUSE", "-sDEVICE=png16m"],
                # As far as I can see, ghostscript never outputs to stderr.
                stdin=subprocess.PIPE, stdout=subprocess.PIPE)
            try:
                self._read_until(b"\nGS")
            except _ConverterError:
                raise OSError("Failed to start Ghostscript")

        def encode_and_escape(name):
            return (os.fsencode(name)
                    .replace(b"\\", b"\\\\")
                    .replace(b"(", br"\(")
                    .replace(b")", br"\)"))

        self._proc.stdin.write(
            b"<< /OutputFile ("
            + encode_and_escape(dest)
            + b") >> setpagedevice ("
            + encode_and_escape(orig)
            + b") run flush\n")
        self._proc.stdin.flush()
        # GS> if nothing left on the stack; GS<n> if n items left on the stack.
        err = self._read_until(b"GS")
        stack = self._read_until(b">")
        if stack or not os.path.exists(dest):
            stack_size = int(stack[1:]) if stack else 0
            self._proc.stdin.write(b"pop\n" * stack_size)
            # Using the systemencoding should at least get the filenames right.
            raise ImageComparisonFailure(
                (err + b"GS" + stack + b">")
                .decode(sys.getfilesystemencoding(), "replace")) 

# 需要導入模塊: import matplotlib [as 別名]
# 或者: from matplotlib import checkdep_ghostscript [as 別名]
def _update_converter():
    gs, gs_v = matplotlib.checkdep_ghostscript()
    if gs_v is not None:
        converter['pdf'] = converter['eps'] = _GSConverter()
    if matplotlib.checkdep_inkscape() is not None:
        converter['svg'] = _SVGConverter()


#: A dictionary that maps filename extensions to functions which
#: themselves map arguments `old` and `new` (filenames) to a list of strings.
#: The list can then be passed to Popen to convert files with that
#: extension to png format. 

# 需要導入模塊: import matplotlib [as 別名]
# 或者: from matplotlib import checkdep_ghostscript [as 別名]
def make_pdf_to_png_converter():
    """
    Returns a function that converts a pdf file to a png file.
    """

    tools_available = []
    # check for pdftocairo
    try:
        check_output([str("pdftocairo"), "-v"], stderr=subprocess.STDOUT)
        tools_available.append("pdftocairo")
    except:
        pass
    # check for ghostscript
    gs, ver = mpl.checkdep_ghostscript()
    if gs:
        tools_available.append("gs")

    # pick converter
    if "pdftocairo" in tools_available:
        def cairo_convert(pdffile, pngfile, dpi):
            cmd = [str("pdftocairo"), "-singlefile", "-png", "-r", "%d" % dpi,
                   pdffile, os.path.splitext(pngfile)[0]]
            check_output(cmd, stderr=subprocess.STDOUT)
        return cairo_convert
    elif "gs" in tools_available:
        def gs_convert(pdffile, pngfile, dpi):
            cmd = [str(gs),
                   '-dQUIET', '-dSAFER', '-dBATCH', '-dNOPAUSE', '-dNOPROMPT',
                   '-dUseCIEColor', '-dTextAlphaBits=4',
                   '-dGraphicsAlphaBits=4', '-dDOINTERPOLATE',
                   '-sDEVICE=png16m', '-sOutputFile=%s' % pngfile,
                   '-r%d' % dpi, pdffile]
            check_output(cmd, stderr=subprocess.STDOUT)
        return gs_convert
    else:
        raise RuntimeError("No suitable pdf to png renderer found.")