From c3b0fa04a663fe233765b83d3be41a42aa08c25d Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Mon, 3 May 2021 08:21:10 +0100
Subject: Initial import for public release

---
 tools/dump-pal.py | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100755 tools/dump-pal.py

(limited to 'tools/dump-pal.py')

diff --git a/tools/dump-pal.py b/tools/dump-pal.py
new file mode 100755
index 0000000..c87d7e7
--- /dev/null
+++ b/tools/dump-pal.py
@@ -0,0 +1,95 @@
+#!/usr/bin/env python
+
+__version__ = "1.0"
+
+from argparse import ArgumentParser
+from PIL import Image
+
+# firmware
+CPC_PAL = (
+    [0, 0, 0],
+    [0, 0, 128],
+    [0, 0, 255],
+    [128, 0, 0],
+    [128, 0, 128],
+    [128, 0, 255],
+    [255, 0, 0],
+    [255, 0, 128],
+    [255, 0, 255],
+    [0, 128, 0],
+    [0, 128, 128],
+    [0, 128, 255],
+    [128, 128, 0],
+    [128, 128, 128],
+    [128, 128, 255],
+    [255, 128, 0],
+    [255, 128, 128],
+    [255, 128, 255],
+    [0, 255, 0],
+    [0, 255, 128],
+    [0, 255, 255],
+    [128, 255, 0],
+    [128, 255, 128],
+    [128, 255, 255],
+    [255, 255, 0],
+    [255, 255, 128],
+    [255, 255, 255],
+        )
+
+# hardware
+CPC_PAL_HW = (
+    0x54, 0x44, 0x55, 0x5c, 0x58, 0x5d, 0x4c, 0x45, 0x4d,
+    0x56, 0x46, 0x57, 0x5e, 0x40, 0x5f, 0x4e, 0x47, 0x4f,
+    0x52, 0x42, 0x53, 0x5a, 0x59, 0x5b, 0x4a, 0x43, 0x4b,
+        )
+
+def main():
+
+    parser = ArgumentParser(description="PNG to CPC palette (firmware)",
+                            epilog="Copyright (C) 2015 Juan J Martinez <jjm@usebox.net>",
+                            )
+
+    parser.add_argument("--version", action="version", version="%(prog)s "  + __version__)
+    parser.add_argument("--hw", action="store_true", dest="hardware")
+    parser.add_argument("image", help="image to convert")
+    parser.add_argument("pal_dump", help="filename for the palette dump")
+
+    args = parser.parse_args()
+
+    try:
+        image = Image.open(args.image)
+    except IOError:
+        parser.error("failed to open the image")
+
+    if image.mode != "P":
+        parser.error("not an indexed image (no palette)")
+
+    palette = image.getpalette()
+    if not palette:
+        parser.error("failed to extract the palette (is this an indexed image?)")
+
+    colors = image.getcolors(maxcolors=16)
+    if not colors:
+        parser.error("failed to extract the palette (color limit is 16)")
+
+    rgb = []
+    for _, i in colors:
+        c = palette[i * 3:i * 3 + 3]
+        if c not in CPC_PAL:
+            parser.error("%r not in the CPC palette" % c)
+        if c not in rgb:
+            rgb.append(c)
+
+    out = [CPC_PAL.index(c) for c in rgb]
+    if len(out) < 16:
+        out.extend([i for i in range(16 - len(out))])
+
+    if args.hardware:
+        out = [CPC_PAL_HW[c] for c in out]
+
+    with open(args.pal_dump, "wb") as fd:
+        fd.write(bytearray(out))
+
+if __name__ == "__main__":
+    main()
+
-- 
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