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#!/usr/bin/env python3
#
# Copyright (C) 2019 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.
#
from argparse import ArgumentParser
from PIL import Image
__version__ = "1.0"
DEF_W = 16
DEF_H = 16
TRANS = (28, 28, 28)
def to_hex_list_str(src):
out = ""
for i in range(0, len(src), 8):
out += ", ".join(["0x%02x" % b for b in src[i : i + 8]]) + ",\n"
return out
def to_hex_list_str_asm(src):
out = ""
for i in range(0, len(src), 8):
out += "\tdb " + ", ".join(["#%02x" % b for b in src[i : i + 8]])
out += "\n"
return out
def main():
parser = ArgumentParser(
description="PNG to MSX sprites",
epilog="Copyright (C) 2019 Juan J Martinez <jjm@usebox.net>",
)
parser.add_argument(
"--version", action="version", version="%(prog)s " + __version__
)
parser.add_argument(
"-i",
"--id",
dest="id",
default="sprites",
type=str,
help="variable name (default: sprites)",
)
parser.add_argument(
"-a",
"--asm",
dest="asm",
action="store_true",
help="ASM output (default: C header)",
)
parser.add_argument(
"-c",
"--colors",
dest="frame_colors",
action="store_true",
help="include frame color as a comment",
)
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 % DEF_W or h % DEF_H:
parser.error(
"%s size is not multiple of sprite size (%s, %s)"
% (args.image, DEF_W, DEF_H)
)
data = image.getdata()
out = []
frame_colors = []
for y in range(0, h, DEF_H):
for x in range(0, w, DEF_W):
tile = [
data[x + i + ((y + j) * w)] for j in range(DEF_H) for i in range(DEF_W)
]
cols = set([c for c in tile if c != TRANS])
if not cols:
continue
for c in cols:
frame_colors.append(c)
frame = []
for i, j in ((0, 0), (0, 8), (8, 0), (8, 8)):
for m in range(8):
byte = 0
p = 7
for k in range(8):
b = 1 if tile[i + (j + m) * 16 + k] == c else 0
byte |= b << p
p -= 1
frame.append(byte)
out.append(frame)
if args.asm:
print("%s_LEN = %d" % (args.id.upper(), len(out) * 32))
print("%s_FRAMES = %d\n" % (args.id.upper(), len(out)))
print("%s:\n" % args.id)
for i, frame in enumerate(out):
print("%s_frame%d:" % (args.id, i))
if args.frame_colors:
print(
"\t; color: #%02x%02x%02x"
% (frame_colors[i][0], frame_colors[i][1], frame_colors[i][2])
)
print(to_hex_list_str_asm(frame))
else:
print("#ifndef _%s_H" % args.id.upper())
print("#define _%s_H\n" % args.id.upper())
print("#define %s_LEN %d\n" % (args.id.upper(), len(out) * 32))
print("#define %s_FRAMES %d\n" % (args.id.upper(), len(out)))
data_out = ""
for i, frame in enumerate(out):
if args.frame_colors:
data_out += "/* color: 0x%02x%02x%02x */\n" % (
frame_colors[i][0],
frame_colors[i][1],
frame_colors[i][2],
)
data_out += "{\n" + to_hex_list_str(frame) + "}"
if i + 1 < len(out):
data_out += ",\n"
print("#ifdef LOCAL")
print(
"const unsigned char %s[%d][%d] = {\n%s\n};\n"
% (args.id, len(out), len(out[0]), data_out)
)
print("#else\n")
print(
"extern const unsigned char %s[%d][%d];" % (args.id, len(out), len(out[0]))
)
print("#endif // LOCAL\n")
print("#endif // _%s_H\n" % args.id.upper())
if __name__ == "__main__":
main()
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