Added rotate tiles tool

1 files changed, 83 insertions, 0 deletions

diff --git a/tools/rotate.py b/tools/rotate.py
new file mode 100755
index 0000000..1fcc2c9
--- /dev/null
+++ b/tools/rotate.py
@@ -0,0 +1,83 @@
+#!/usr/bin/env python3
+#
+# Rotate tiles
+# Copyright (C) 2023 by Juan J. Martinez <jjm@usebox.net>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+__version__ = "1.0"
+
+import sys
+from argparse import ArgumentParser
+from itertools import chain
+
+try:
+    from PIL import Image
+except ImportError:
+    sys.exit("Please install PIP (or pillow)")
+
+
+def main():
+
+    parser = ArgumentParser(
+        description="Rotate tiles",
+        epilog="Copyright (C) 2023 Juan J Martinez <jjm@usebox.net>",
+    )
+
+    parser.add_argument(
+        "--version", action="version", version="%(prog)s " + __version__
+    )
+
+    parser.add_argument("image", help="image to convert")
+    parser.add_argument("width", help="witdth of the tiles", type=int)
+    parser.add_argument("height", help="height of the tiles", type=int)
+    parser.add_argument("dest", help="destination image")
+
+    args = parser.parse_args()
+
+    try:
+        image = Image.open(args.image)
+    except IOError:
+        parser.error("failed to open the image")
+
+    (w, h) = image.size
+
+    if w % args.width or h % args.height:
+        parser.error("%s size is not multiple of the tile size" % args.image)
+
+    data = list(image.convert("RGB").getdata())
+
+    ntiles = 0
+    out = []
+    for base_y in range(0, h, args.height):
+        for x in range(0, w, args.width):
+            tile = []
+            for y in range(base_y, base_y + args.height):
+                tile.extend(data[x + y * w : x + y * w + args.width])
+            out.extend(tile)
+            ntiles += 1
+
+    out_data = list(chain.from_iterable(out))
+    result = Image.frombytes("RGB", (args.width, args.height * ntiles), bytes(out_data))
+    with open(args.dest, "wb") as fd:
+        result.save(fd)
+
+
+if __name__ == "__main__":
+    main()