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#53 Add support for the ArtMaster88 IMG format
None
closed-fixed
5
2020-09-14
2019-11-02
No
ArtMaster88 was an image editor for the PC-88 and the files it saved had the .IMG extension.
This site has the documentation and source code on how to read ArtMaster88 IMG files.
I also attached here two sample files, kindly provided by Wakachan. The PNG folder contains reference renderings.
With the linked source code it's no problem to understand the format well enough to decode the sample files. However it doesnt's appear likely that this format is entirely specific to ArtMaster88 (that is the version of ArtMaster for the PC-8800 series). It uses ordinary bitplanes, which isn't very hardware specific to begin with. And it obviously has features ignored by the linked source code. It's also easy to imagine ways the format could be extended. So I assume at least all versions of ArtMaster (I know of four) could use the same format. The header contains the string "SS_SIF" which could be a hint to the formats actual name and maybe the scope of it's application.
I havn't yet been able to find more images or get hold of any version of ArtMaster (it would be a lot easier if I knew Japanese).
The program at http://nanyanen.jp/library/readart.html doesn't read the attached samples.
OK, so I implemented that.
The program was expecting "SS_SIF 0.02" while there's "SS_SIF 0.00" in the file. The other problem was the program was fixed for the 640x400 resolution. The files have the 640x200 resolution in the header. This is the resolution that RECOIL supports.