iff2png is a command-line tool for converting IFF (Interchange File Format)
bitmap images to PNG format. It supports all major IFF image formats
including ILBM, PBM, RGBN, RGB8, DEEP, ACBM, 24-bit ILBM, and FAXX.
Features:
- Supports all major IFF formats (ILBM, PBM, RGBN, RGB8, DEEP, ACBM, FAXX)
- Handles 24-bit ILBM (deep ILBM with true-color RGB)
- Automatic optimal PNG encoding based on source image properties
- Preserves transparency and alpha channels
- Supports HAM (Hold And Modify) and EHB (Extra Half-Brite) modes
- Preserves metadata (copyright, author, annotations) unless stripped
Requirements:
- AmigaOS 3.1 or higher
Usage:
iff2png SOURCE TARGET [OPTIONS]
Arguments:
SOURCE - Input IFF image file (required)
TARGET - Output PNG file (required)
Options:
FORCE - Overwrite existing output file without prompting
QUIET - Suppress normal output messages
OPAQUE - Keep color 0 opaque instead of transparent (legacy behavior)
STRIP or NOMETADATA - Remove metadata from output PNG
Examples:
iff2png source.iff ram:target.png
iff2png source.iff target.png FORCE QUIET
iff2png source.iff target.png OPAQUE
N.B. file extension is not used to recognize file types
Supported IFF Formats:
- ILBM (InterLeaved BitMap) - Standard Amiga bitmap with bitplanes
- PBM (Packed BitMap) - Packed pixel format
- RGBN - RGB with N planes (true-color)
- RGB8 - RGB 8-bit format (24-bit color, 32-bit with alpha)
- DEEP - High bit-depth format for professional graphics
- ACBM (Amiga Continuous BitMap) - Format with separate alpha channel
- 24-bit ILBM - Deep ILBM with 24 bitplanes for true-color RGB
- FAXX - Facsimile image format using ITU-T T.4 compression
The tool automatically selects the optimal PNG encoding based on the source
image properties, including color type, bit depth, palette optimization,
and transparency handling.
For more information, and to report issues, visit:
- GitHub: https://github.com/amigazen/iff2png/
- Web: http://www.amigazen.com/toolkit/
This software is Free and Open Source Software distributed on BSD-2 license terms:
Copyright (c) 2025 amigazen project
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Acknowledgements:
- zlib compression library by Jean-loup Gailly and Mark Adler
- libpng PNG Reference Library by the PNG Development Group
amigazen project philosophy is based on openness:
Open to anyone and everyone - Open source and free for all - Open your mind and create!
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