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#!/usr/bin/env python3
#
# Copyright (C) 2018-2023 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 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) 2018-2023 Juan J Martinez <jjm@usebox.net>",
)
parser.add_argument(
"--version", action="version", version="%(prog)s " + __version__
)
parser.add_argument("image", help="image to convert")
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()
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