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- #
- # The Python Imaging Library.
- # $Id$
- #
- # XBM File handling
- #
- # History:
- # 1995-09-08 fl Created
- # 1996-11-01 fl Added save support
- # 1997-07-07 fl Made header parser more tolerant
- # 1997-07-22 fl Fixed yet another parser bug
- # 2001-02-17 fl Use 're' instead of 'regex' (Python 2.1) (0.4)
- # 2001-05-13 fl Added hotspot handling (based on code from Bernhard Herzog)
- # 2004-02-24 fl Allow some whitespace before first #define
- #
- # Copyright (c) 1997-2004 by Secret Labs AB
- # Copyright (c) 1996-1997 by Fredrik Lundh
- #
- # See the README file for information on usage and redistribution.
- #
-
- import re
- from . import Image, ImageFile
-
- __version__ = "0.6"
-
- # XBM header
- xbm_head = re.compile(
- br"\s*#define[ \t]+.*_width[ \t]+(?P<width>[0-9]+)[\r\n]+"
- b"#define[ \t]+.*_height[ \t]+(?P<height>[0-9]+)[\r\n]+"
- b"(?P<hotspot>"
- b"#define[ \t]+[^_]*_x_hot[ \t]+(?P<xhot>[0-9]+)[\r\n]+"
- b"#define[ \t]+[^_]*_y_hot[ \t]+(?P<yhot>[0-9]+)[\r\n]+"
- b")?"
- b"[\\000-\\377]*_bits\\[\\]"
- )
-
-
- def _accept(prefix):
- return prefix.lstrip()[:7] == b"#define"
-
-
- ##
- # Image plugin for X11 bitmaps.
-
- class XbmImageFile(ImageFile.ImageFile):
-
- format = "XBM"
- format_description = "X11 Bitmap"
-
- def _open(self):
-
- m = xbm_head.match(self.fp.read(512))
-
- if m:
-
- xsize = int(m.group("width"))
- ysize = int(m.group("height"))
-
- if m.group("hotspot"):
- self.info["hotspot"] = (
- int(m.group("xhot")), int(m.group("yhot"))
- )
-
- self.mode = "1"
- self._size = xsize, ysize
-
- self.tile = [("xbm", (0, 0)+self.size, m.end(), None)]
-
-
- def _save(im, fp, filename):
-
- if im.mode != "1":
- raise IOError("cannot write mode %s as XBM" % im.mode)
-
- fp.write(("#define im_width %d\n" % im.size[0]).encode('ascii'))
- fp.write(("#define im_height %d\n" % im.size[1]).encode('ascii'))
-
- hotspot = im.encoderinfo.get("hotspot")
- if hotspot:
- fp.write(("#define im_x_hot %d\n" % hotspot[0]).encode('ascii'))
- fp.write(("#define im_y_hot %d\n" % hotspot[1]).encode('ascii'))
-
- fp.write(b"static char im_bits[] = {\n")
-
- ImageFile._save(im, fp, [("xbm", (0, 0)+im.size, 0, None)])
-
- fp.write(b"};\n")
-
-
- Image.register_open(XbmImageFile.format, XbmImageFile, _accept)
- Image.register_save(XbmImageFile.format, _save)
-
- Image.register_extension(XbmImageFile.format, ".xbm")
-
- Image.register_mime(XbmImageFile.format, "image/xbm")
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