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+#
+# The Python Imaging Library
+# $Id: GbrImagePlugin.py 2134 2004-10-06 08:55:20Z fredrik $
+#
+# load a GIMP brush file
+#
+# History:
+# 96-03-14 fl Created
+#
+# Copyright (c) Secret Labs AB 1997.
+# Copyright (c) Fredrik Lundh 1996.
+#
+# See the README file for information on usage and redistribution.
+#
+
+import Image, ImageFile
+
+def i32(c):
+ return ord(c[3]) + (ord(c[2])<<8) + (ord(c[1])<<16) + (ord(c[0])<<24L)
+
+def _accept(prefix):
+ return i32(prefix) >= 20 and i32(prefix[4:8]) == 1
+
+##
+# Image plugin for the GIMP brush format.
+
+class GbrImageFile(ImageFile.ImageFile):
+
+ format = "GBR"
+ format_description = "GIMP brush file"
+
+ def _open(self):
+
+ header_size = i32(self.fp.read(4))
+ version = i32(self.fp.read(4))
+ if header_size < 20 or version != 1:
+ raise SyntaxError, "not a GIMP brush"
+
+ width = i32(self.fp.read(4))
+ height = i32(self.fp.read(4))
+ bytes = i32(self.fp.read(4))
+ if width <= 0 or height <= 0 or bytes != 1:
+ raise SyntaxError, "not a GIMP brush"
+
+ comment = self.fp.read(header_size - 20)[:-1]
+
+ self.mode = "L"
+ self.size = width, height
+
+ self.info["comment"] = comment
+
+ # Since the brush is so small, we read the data immediately
+ self.data = self.fp.read(width * height)
+
+ def load(self):
+
+ if not self.data:
+ return
+
+ # create an image out of the brush data block
+ self.im = Image.core.new(self.mode, self.size)
+ self.im.fromstring(self.data)
+ self.data = ""
+
+#
+# registry
+
+Image.register_open("GBR", GbrImageFile, _accept)
+
+Image.register_extension("GBR", ".gbr")