up follow livre

venv/lib/python3.13/site-packages/PIL/GimpPaletteFile.py

@@ -0,0 +1,72 @@
+#
+# Python Imaging Library
+# $Id$
+#
+# stuff to read GIMP palette files
+#
+# History:
+# 1997-08-23 fl     Created
+# 2004-09-07 fl     Support GIMP 2.0 palette files.
+#
+# Copyright (c) Secret Labs AB 1997-2004.  All rights reserved.
+# Copyright (c) Fredrik Lundh 1997-2004.
+#
+# See the README file for information on usage and redistribution.
+#
+from __future__ import annotations
+
+import re
+from io import BytesIO
+from typing import IO
+
+
+class GimpPaletteFile:
+    """File handler for GIMP's palette format."""
+
+    rawmode = "RGB"
+
+    def _read(self, fp: IO[bytes], limit: bool = True) -> None:
+        if not fp.readline().startswith(b"GIMP Palette"):
+            msg = "not a GIMP palette file"
+            raise SyntaxError(msg)
+
+        palette: list[int] = []
+        i = 0
+        while True:
+            if limit and i == 256 + 3:
+                break
+
+            i += 1
+            s = fp.readline()
+            if not s:
+                break
+
+            # skip fields and comment lines
+            if re.match(rb"\w+:|#", s):
+                continue
+            if limit and len(s) > 100:
+                msg = "bad palette file"
+                raise SyntaxError(msg)
+
+            v = s.split(maxsplit=3)
+            if len(v) < 3:
+                msg = "bad palette entry"
+                raise ValueError(msg)
+
+            palette += (int(v[i]) for i in range(3))
+            if limit and len(palette) == 768:
+                break
+
+        self.palette = bytes(palette)
+
+    def __init__(self, fp: IO[bytes]) -> None:
+        self._read(fp)
+
+    @classmethod
+    def frombytes(cls, data: bytes) -> GimpPaletteFile:
+        self = cls.__new__(cls)
+        self._read(BytesIO(data), False)
+        return self
+
+    def getpalette(self) -> tuple[bytes, str]:
+        return self.palette, self.rawmode