png2iff

Converts indexed or truecolor PNG files to classic Amiga IFF format.

Supports color quantization, palette remapping, and multiple dithering modes.

Compression: ByteRun1 (optional with --nocompress)

Usage:
  png2iff input.png output.iff [options]
Options:
  --quantize N            Quantize RGB image to N colors.
                          Allowed: 2, 4, 8, 16, 32, 64, 128, 256
  --remap palette.png     Remap RGB image to existing palette image.
                          Must contain ≤ 256 unique colors.
  --dither TYPE           Apply dithering before quantize/remap.
                          Supported types:
                            bayer2x2    - 2x2 ordered dither
                            bayer4x4    - 4x4 ordered dither
                            bayer8x8    - 8x8 ordered dither
                            floyd       - Floyd-Steinberg error diffusion
                            sierra      - Sierra Lite error diffusion
                            checks      - Checkered matrix pattern
                            hatch       - Cross-hatch pattern
                            horizontal  - Horizontal line
                            vertical    - Vertical line
                            diagonal    - Diagonal line
  --strength VALUE        Dither intensity (0.0 to 1.0, default: 1.0)
  --nocompress            Disables ILBM ByteRun1 compression.
  --about                 Show program info and version.