OwlCyberSecurity - MANAGER

Edit File: XpmImagePlugin.py

#
# The Python Imaging Library.
# $Id$
#
# XPM File handling
#
# History:
# 1996-12-29 fl   Created
# 2001-02-17 fl   Use 're' instead of 'regex' (Python 2.1) (0.7)
#
# Copyright (c) Secret Labs AB 1997-2001.
# Copyright (c) Fredrik Lundh 1996-2001.
#
# See the README file for information on usage and redistribution.
#

import re

from . import Image, ImageFile, ImagePalette
from ._binary import i8, o8

# XPM header
xpm_head = re.compile(b'"([0-9]*) ([0-9]*) ([0-9]*) ([0-9]*)')

def _accept(prefix):
    return prefix[:9] == b"/* XPM */"

##
# Image plugin for X11 pixel maps.

class XpmImageFile(ImageFile.ImageFile):

format = "XPM"
    format_description = "X11 Pixel Map"

def _open(self):

if not _accept(self.fp.read(9)):
            raise SyntaxError("not an XPM file")

# skip forward to next string
        while True:
            s = self.fp.readline()
            if not s:
                raise SyntaxError("broken XPM file")
            m = xpm_head.match(s)
            if m:
                break

self._size = int(m.group(1)), int(m.group(2))

pal = int(m.group(3))
        bpp = int(m.group(4))

if pal > 256 or bpp != 1:
            raise ValueError("cannot read this XPM file")

#
        # load palette description

palette = [b"\0\0\0"] * 256

for i in range(pal):

s = self.fp.readline()
            if s[-2:] == b"\r\n":
                s = s[:-2]
            elif s[-1:] in b"\r\n":
                s = s[:-1]

c = i8(s[1])
            s = s[2:-2].split()

for i in range(0, len(s), 2):

if s[i] == b"c":

# process colour key
                    rgb = s[i + 1]
                    if rgb == b"None":
                        self.info["transparency"] = c
                    elif rgb[0:1] == b"#":
                        # FIXME: handle colour names (see ImagePalette.py)
                        rgb = int(rgb[1:], 16)
                        palette[c] = (
                            o8((rgb >> 16) & 255) + o8((rgb >> 8) & 255) + o8(rgb & 255)
                        )
                    else:
                        # unknown colour
                        raise ValueError("cannot read this XPM file")
                    break

else:

# missing colour key
                raise ValueError("cannot read this XPM file")

self.mode = "P"
        self.palette = ImagePalette.raw("RGB", b"".join(palette))

self.tile = [("raw", (0, 0) + self.size, self.fp.tell(), ("P", 0, 1))]

def load_read(self, bytes):

#
        # load all image data in one chunk

xsize, ysize = self.size

s = [None] * ysize

for i in range(ysize):
            s[i] = self.fp.readline()[1 : xsize + 1].ljust(xsize)

return b"".join(s)

#
# Registry

Image.register_open(XpmImageFile.format, XpmImageFile, _accept)

Image.register_extension(XpmImageFile.format, ".xpm")

Image.register_mime(XpmImageFile.format, "image/xpm")