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The Dust Council
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138
lenser/cli.py
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138
lenser/cli.py
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"""Headless entry point: convert an image, write a disk image and/or a preview PNG."""
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from __future__ import annotations
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import argparse
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import sys
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from PIL import Image
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from . import imageprep
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from .convert import MODES, convert_image, render_preview
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from .palette import COLOR_NAMES
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def build_parser() -> argparse.ArgumentParser:
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p = argparse.ArgumentParser(prog="8bitlenser", description=__doc__)
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p.add_argument("image", help="source image (png/jpg/gif/bmp/webp)")
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p.add_argument("-o", "--output", help="disk image path (.d64/.d71/.d81/.atr)")
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p.add_argument("--platform", default="c64",
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choices=["c64", "atari", "apple", "ti99", "coco", "bbc",
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"coleco", "a2600", "intv", "vic20", "spectrum", "a5200",
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"a7800", "c128", "c16", "plus4", "cpc", "coco3",
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"nes", "iigs", "pet2001", "pet4032", "pet8032",
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"superpet", "sms", "amiga", "ansi"],
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help="target machine (coleco = ColecoVision/Adam, "
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"a2600 = Atari 2600/VCS, intv = Mattel Intellivision, "
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"vic20 = Commodore VIC-20, spectrum = Sinclair ZX Spectrum, "
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"a5200 = Atari 5200, a7800 = Atari 7800, "
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"c128 = Commodore 128 VDC 80-column, "
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"c16 = Commodore 16 TED hires, "
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"plus4 = Commodore Plus/4 TED hires, "
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"cpc = Amstrad CPC, "
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"coco3 = Tandy CoCo 3 GIME, "
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"nes = Nintendo NES/Famicom, "
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"iigs = Apple IIGS Super Hi-Res, "
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"pet2001/pet4032 = 40-col PET/CBM, "
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"pet8032/superpet = 80-col PET/CBM, "
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"sms = Sega Master System, "
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"amiga = Commodore Amiga)")
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p.add_argument("-m", "--mode", default="auto",
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choices=["auto", *MODES, "gr15", "gr9", "gr8", "gr15dli",
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"hgr_mono", "dhgr", "hgr_color", "gm2",
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"pmode4", "pmode3",
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"mode0", "mode1", "mode2", "mode5", "stic", "pf_il",
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"c160", "color", "hicolor", "gr16", "gr4", "bg",
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"shr", "lowres", "80x25", "80x50"],
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help="display mode (c64: hires/multicolor/fli/interlace/mono; "
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"atari: gr15/gr9/gr8/gr15dli; apple: hgr_mono/dhgr; "
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"ti99: gm2; coco: pmode4/pmode3; bbc: mode0/1/2/5; "
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"intv: stic; ansi: 80x25/80x50)")
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p.add_argument("-f", "--format", default=None,
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choices=["d64", "d71", "d81", "crt", "atr", "car", "ccc",
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"ssd", "col", "a26", "int", "a0", "sna", "a52", "a78",
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"prg", "nes", "sms", "adf", "ans"],
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help="output format: c64 disk d64/d71/d81 or cartridge crt; "
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"atari disk atr or cartridge car (default: from -o ext)")
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p.add_argument("-p", "--palette", default="colodore",
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choices=["colodore", "pepto"])
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p.add_argument("-d", "--dither", default=None,
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choices=["bayer", "bluenoise", "yliluoma", "floyd",
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"atkinson", "stucki", "jarvis", "sierra",
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"sierra_lite", "burkes", "riemersma",
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"ostromoukhov", "none"],
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help="dithering (default: atkinson; none for intv -- "
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"per-platform defaults that suit each format)")
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p.add_argument("--mono-base", default="grayscale",
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choices=["grayscale", *COLOR_NAMES],
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help="base colour for 'mono' mode (default greyscale)")
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p.add_argument("-a", "--aspect", default="fit",
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choices=["fit", "fill", "stretch"])
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p.add_argument("--video", default="pal", choices=["pal", "ntsc"],
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help="target video standard (affects the FLI viewer timing)")
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p.add_argument("--intensive", action="store_true",
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help="exhaustive background search + slower, higher-quality passes")
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p.add_argument("--brightness", type=float, default=1.0)
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p.add_argument("--contrast", type=float, default=1.0)
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p.add_argument("--saturation", type=float, default=1.0)
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p.add_argument("--gamma", type=float, default=1.0)
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p.add_argument("--tint", type=float, default=0.0,
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help="hue rotation in degrees (-180..180)")
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p.add_argument("--red", type=float, default=1.0, help="red level (gain)")
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p.add_argument("--green", type=float, default=1.0, help="green level (gain)")
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p.add_argument("--blue", type=float, default=1.0, help="blue level (gain)")
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p.add_argument("--preview", help="also write a PNG preview to this path")
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p.add_argument("--disk-name", default=None, help="disk + viewer name (PETSCII)")
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p.add_argument("--display", default="key",
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choices=["forever", "key", "seconds"],
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help="how long the viewer holds the picture (C64): forever, "
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"until a key, or --seconds N then exit to BASIC")
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p.add_argument("--seconds", type=int, default=10,
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help="seconds to display when --display seconds")
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p.add_argument("--viewer", default="unified",
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choices=["unified", "separate"],
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help="unified = one self-contained file; separate = viewer "
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"binary + a standalone 'data' image file (C64 disk)")
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return p
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def main(argv=None) -> int:
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args = build_parser().parse_args(argv)
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prep = imageprep.PrepOptions(
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aspect=args.aspect, brightness=args.brightness, contrast=args.contrast,
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saturation=args.saturation, gamma=args.gamma,
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tint=args.tint, red=args.red, green=args.green, blue=args.blue,
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)
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from . import platforms
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# Atkinson is the default dither (only used when -d is not given): its lighter
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# error diffusion bleeds less across constrained colour cells and keeps clean
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# local contrast. The one exception is the Intellivision, whose 64-tile GRAM
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# dictionary bloats under any diffusion, so it defaults to no dithering.
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_def_dither = {"intv": "none"}
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dither = args.dither or _def_dither.get(args.platform, "atkinson")
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conv = platforms.convert(args.platform, args.image, args.mode, args.palette,
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dither, args.intensive, prep, args.mono_base)
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_dsz = len(conv.data) if isinstance(conv.data, (bytes, bytearray)) else None
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print(f"platform={args.platform} mode={conv.mode} mean dE={conv.error:.2f}"
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+ (f" data={_dsz}B" if _dsz is not None else ""))
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if args.preview:
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rgb = render_preview(conv, args.palette, scale=2)
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Image.fromarray(rgb, "RGB").save(args.preview)
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print(f"wrote preview {args.preview}")
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if args.output:
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path = platforms.export(args.platform, conv, args.output, args.format,
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args.image, args.video, display=args.display,
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seconds=args.seconds, layout=args.viewer)
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kind = "ANSI art" if args.platform == "ansi" else "disk image"
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print(f"wrote {kind} {path}")
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if not args.output and not args.preview:
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print("nothing to do: pass -o DISK and/or --preview PNG", file=sys.stderr)
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return 1
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return 0
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if __name__ == "__main__":
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raise SystemExit(main())
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