# # 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 # 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 OSError(f"cannot write mode {im.mode} as XBM") fp.write(f"#define im_width {im.size[0]}\n".encode("ascii")) fp.write(f"#define im_height {im.size[1]}\n".encode("ascii")) hotspot = im.encoderinfo.get("hotspot") if hotspot: fp.write(f"#define im_x_hot {hotspot[0]}\n".encode("ascii")) fp.write(f"#define im_y_hot {hotspot[1]}\n".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")