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33 lines
1.1 KiB
Python
33 lines
1.1 KiB
Python
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#!/usr/bin/env python3
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import argparse
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def decode_rgba5551(short, max=False):
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red = (short & 0xF800) >> 8
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green = (short & 0x07C0) >> 3
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blue = (short & 0x003E) << 2
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alpha = 1 if (short % 2) else 0
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if max:
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red |= red >> 5
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green |= green >> 5
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blue |= blue >> 5
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return (red, green, blue, alpha)
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def u16(x):
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x = int(x, 16)
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if x > 0xFFFF:
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raise argparse.ArgumentTypeError("expecting a short (u16) representing a single color.")
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return x
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def main():
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parser = argparse.ArgumentParser(description="Decodes a color encoded in rgba5551.")
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parser.add_argument("short", type=u16, help="u16 raw value of the color to decode")
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args = parser.parse_args()
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print("Min: GPACK_RGBA5551(%d, %d, %d, %d)" % decode_rgba5551(args.short, max=False))
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print("Max: GPACK_RGBA5551(%d, %d, %d, %d)" % decode_rgba5551(args.short, max=True))
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print("Note: All RGB values between these encode to the given value.")
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print(" Use the representation that makes the most sense.\n")
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if __name__ == "__main__":
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main()
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