Added CAS support to the example game

1 files changed, 140 insertions, 0 deletions

diff --git a/tools/png2scr.py b/tools/png2scr.py
new file mode 100755
index 0000000..5d08915
--- /dev/null
+++ b/tools/png2scr.py
@@ -0,0 +1,140 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018-2022 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 PIL import Image
+from collections import defaultdict
+
+DEF_W = 8
+DEF_H = 8
+
+# TOSHIBA palette
+MSX_COLS = [
+    (255, 0, 255),
+    (0, 0, 0),
+    (102, 204, 102),
+    (136, 238, 136),
+    (68, 68, 221),
+    (119, 119, 255),
+    (187, 85, 85),
+    (119, 221, 221),
+    (221, 102, 102),
+    (255, 119, 119),
+    (204, 204, 85),
+    (238, 238, 136),
+    (85, 170, 85),
+    (187, 85, 187),
+    (204, 204, 204),
+    (238, 238, 238),
+]
+
+
+def main():
+
+    parser = ArgumentParser(
+        description="PNG to SCR file",
+        epilog="Copyright (C) 2018-2022 Juan J Martinez <jjm@usebox.net>",
+    )
+
+    parser.add_argument(
+        "--version", action="version", version="%(prog)s " + __version__
+    )
+
+    parser.add_argument("image", help="image to convert")
+
+    args = parser.parse_args()
+
+    try:
+        image = Image.open(args.image)
+    except IOError:
+        parser.error("failed to open the image")
+
+    if image.mode != "RGB":
+        parser.error("not a RGB image")
+
+    (w, h) = image.size
+
+    if w % 256 or h % 192:
+        parser.error("%s size is not 256x192" % args.image)
+
+    data = image.getdata()
+
+    color_idx = defaultdict(list)
+    color = []
+    out = []
+    ntiles = 0
+    for y in range(0, h, DEF_H):
+        for x in range(0, w, DEF_W):
+            # tile data
+            tile = [
+                data[x + i + ((y + j) * w)] for j in range(DEF_H) for i in range(DEF_W)
+            ]
+
+            # get the attibutes of the tile
+            # FIXME: this may not be right
+            for i in range(0, len(tile), DEF_W):
+                cols = list(sorted(set(tile[i : i + DEF_W])))
+
+                if len(cols) > 2:
+                    parser.error(
+                        "tile %d (%d, %d) has more than two colors: %r"
+                        % (ntiles, x, y, cols)
+                    )
+                elif len(cols) == 1:
+                    cols.append(MSX_COLS[1])
+
+                for c in cols:
+                    if c not in MSX_COLS:
+                        parser.error(
+                            "tile %d (%d, %d) has a color not in the MSX palette: %r"
+                            % (ntiles, x, y, c)
+                        )
+
+                # each tile has two coloributes per row
+                color_idx[ntiles * DEF_H + i // DEF_W] = cols
+                color.append((MSX_COLS.index(cols[1]) << 4) | MSX_COLS.index(cols[0]))
+
+            frame = []
+            for i in range(0, len(tile), 8):
+                byte = 0
+                p = 7
+                for k in range(8):
+                    # 0 or 1 is determined by the order in the coloributes for that row
+                    byte |= (
+                        color_idx[ntiles * DEF_H + i // DEF_W].index(tile[i + k]) << p
+                    )
+                    p -= 1
+
+                frame.append(byte)
+            ntiles += 1
+            out.extend(frame)
+
+    sys.stdout.buffer.write(bytes(out))
+    sys.stdout.buffer.write(bytes(color))
+
+
+if __name__ == "__main__":
+    main()