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#!/usr/bin/env python3
__version__ = "1.0"
import sys
from argparse import ArgumentParser
from PIL import Image
DEF_W = 8
DEF_H = 16
def encode_byte(a, b):
return (
(a & 1) << 7
| (b & 1) << 6
| (a & 4) << 3
| (b & 4) << 2
| (a & 2) << 2
| (b & 2) << 1
| (a & 8) >> 2
| (b & 8) >> 3
)
def main():
parser = ArgumentParser(
description="Image to CPC tile/image",
epilog="Copyright (C) 2020-2023 Juan J Martinez <jjm@usebox.net>",
)
parser.add_argument(
"--version", action="version", version="%(prog)s " + __version__
)
parser.add_argument(
"-i",
"--id",
dest="id",
default="sprite",
type=str,
help="variable name (default: sprite)",
)
parser.add_argument(
"--width",
dest="w",
default=DEF_W,
type=int,
help="sprite width (default: %s)" % DEF_W,
)
parser.add_argument(
"--height",
dest="h",
default=DEF_H,
type=int,
help="sprite height (default: %s)" % DEF_H,
)
parser.add_argument(
"--transparent-color",
dest="tc",
default=None,
type=int,
help="palette index for the transparent color (default: None)",
)
parser.add_argument(
"-b",
"--binary",
dest="binary",
action="store_true",
help="output binary instead of C code",
)
parser.add_argument(
"-f",
"--frames",
dest="frames",
type=str,
default=None,
help="colon separated frame list to generate a frame map (default: no frame map)",
)
parser.add_argument("image", help="image to convert", nargs="?")
args = parser.parse_args()
if args.frames:
try:
frame_map = list(map(int, args.frames.split(":")))
except Exception as ex:
parser.error("Failed to parse frame map list: %s" % ex)
else:
frame_map = None
if not args.image:
parser.error("required parameter: image")
if args.tc:
try:
args.tc = int(args.tc)
if args.tc < 0 or args.tc > 15:
raise ValueError()
except ValueError:
parser.error("--transparent-color expects an integer in [0, 15]")
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)")
(w, h) = image.size
if w % args.w or h % args.h:
parser.error("%s size is not multiple of the image size" % args.image)
data = image.getdata()
out = []
for base_y in range(0, h, args.h):
for x in range(0, w, args.w):
frame = []
for y in range(base_y, base_y + args.h):
for i in range(0, args.w, 2):
a = data[x + i + (y * w)]
b = data[x + i + 1 + (y * w)]
if args.tc is not None:
mask_a = mask_b = 0
if a == args.tc:
mask_a = 0xF
a = 0
if b == args.tc:
mask_b = 0xF
b = 0
frame.append(encode_byte(mask_a, mask_b))
frame.append(encode_byte(a, b))
out.append(frame)
if args.binary:
for frame in out:
sys.stdout.buffer.write(bytearray(frame))
return
frames = len(out)
print(
"/* %sx%s (frames: %s, mask: %s, frame_map: %s) */"
% (args.w, args.h, frames, args.tc is not None, frame_map)
)
print("#ifdef LOCAL")
if frame_map:
for i, block in enumerate(out):
print(
"const unsigned char %s_frame%d[%d] = { %s };"
% (args.id, i, len(block), ", ".join(["0x%02x" % b for b in block]))
)
print(
"const unsigned char * const %s_frames[%d] = { %s };"
% (
args.id,
len(frame_map),
", ".join(["%s_frame%d" % (args.id, f) for f in frame_map]),
)
)
else:
data_out = ""
for block in out:
if data_out:
data_out += ",\n"
data_out += "{"
for part in range(0, len(block), 4):
if data_out and data_out[-1] != "{":
data_out += ",\n"
data_out += ", ".join(["0x%02x" % b for b in block[part : part + 4]])
data_out += "}"
print(
"const unsigned char %s[%d][%d] = {\n%s\n};\n"
% (args.id, len(out), len(out[0]), data_out)
)
print("#else")
if frame_map:
print(
"extern const unsigned char * const %s_frames[%d];"
% (args.id, len(frame_map))
)
else:
print(
"extern const unsigned char %s[%d][%d];\n"
% (args.id, len(out), len(out[0]))
)
print("#endif")
if __name__ == "__main__":
main()
|
