mirror of
https://github.com/KrisKennaway/ii-pix.git
synced 2024-06-01 06:41:29 +00:00
88 lines
2.9 KiB
Python
88 lines
2.9 KiB
Python
import argparse
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import os.path
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import time
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from PIL import Image
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import numpy as np
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import dither as dither_pyx
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import dither_pattern
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import image as image_py
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import palette as palette_py
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import screen as screen_py
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# TODO:
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# - support alternate palettes properly
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# - include fringing in 140px output
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# - compare to bmp2dhr and a2bestpix
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# - support LR/DLR
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# - support HGR
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# - README
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument("input", type=str, help="Input image file to process.")
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parser.add_argument("output", type=str, help="Output file for converted "
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"Apple II image.")
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parser.add_argument(
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"--lookahead", type=int, default=6,
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help=("How many pixels to look ahead to compensate for NTSC colour "
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"artifacts."))
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parser.add_argument(
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'--dither', type=str, choices=list(dither_pattern.PATTERNS.keys()),
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default=dither_pattern.DEFAULT_PATTERN,
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help="Error distribution pattern to apply when dithering.")
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parser.add_argument(
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'--show_input', action=argparse.BooleanOptionalAction, default=False,
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help="Whether to show the input image before conversion.")
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parser.add_argument(
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'--show_output', action=argparse.BooleanOptionalAction, default=True,
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help="Whether to show the output image after conversion.")
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parser.add_argument(
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'--resolution', type=int, choices=(560, 140), default=560,
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help=("Double hi-res resolution to target. 140 treats pixels in "
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"groups of 4, with 16 colours that can be chosen independently, "
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"and ignores NTSC fringing. 560 treats each pixel individually, "
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"with choice of 2 colours (depending on NTSC colour phase), "
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"and looking ahead over next --lookahead pixels to optimize the "
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"colour sequence.")
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)
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args = parser.parse_args()
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palette = palette_py.Palette()
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if args.resolution == 560:
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screen = screen_py.DHGR560Screen(palette)
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lookahead = args.lookahead
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else:
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screen = screen_py.DHGR140Screen(palette)
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lookahead = 0
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image = image_py.open(screen.X_RES, screen.Y_RES, args.input)
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if args.show_input:
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Image.fromarray(image.astype(np.uint8)).show()
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dither = dither_pattern.PATTERNS[args.dither]()
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start = time.time()
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output_4bit, output_rgb = dither_pyx.dither_image(
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screen, image, dither, lookahead)
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print(time.time() - start)
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screen.pack(output_4bit)
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out_image = Image.fromarray(image_py.linear_to_srgb(output_rgb).astype(
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np.uint8))
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outfile = os.path.join(os.path.splitext(args.output)[0] + ".png")
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out_image.save(outfile, "PNG")
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if args.show_output:
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out_image.show()
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with open(args.output, "wb") as f:
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f.write(bytes(screen.main))
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f.write(bytes(screen.aux))
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if __name__ == "__main__":
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main()
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