
			Brief History of Changes to the
				SDSC Image Tools


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Version 1.0
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Status
	-  First public release.
	-  Released March 1991.

New Features
	-  New tool:  imconv.
	-  New tool:  imfile.
	-  New tool:  imformats.
	-  Manual pages for tools and file formats included.
	-  No source included.

Released for hosts
	-  Alliant FX/80
	-  Alliant FX/2800
	-  Cray Y-MP
	-  SGI 4D
	-  Sun 4



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Version 1.1
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Status
	-  Internal release only.

File format enhancements
	-  TIFF updated to version 5.0 of the TIFF spec.

File format bug fixes
	-  PICT problem with writing bad PackBits files fixed.



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Version 2.0
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Status
	-  Major update.
	-  Second public release.
	-  Released October 1991.

New Features
	-  New tool:  imcopy.
	-  New tool:  imflip.
	-  New tool:  imgray.
	-  New tool:  immono.
	-  New tool:  impaste.
	-  New tool:  imscale.
	-  New library:  libim.a
	-  New Mac application:  SDSC ImageTyper.
	-  Manual pages for tools, library routines, and file formats included.
	-  Source for tools included.
	-  Source for library *not* included.

General Enhancements
	-  Tool help no longer printed on command-line syntax errors.
	-  -help shortend to brief option listing.
	-  -fullhelp added for full option listing.
	-  Term 'interlace' replaced with more common term 'interleave'.

New image file formats
	-  Device-independent Encapsulated PostScript (EPSI) file format.
	-  Sun Icon and Cursor file format.
	-  PCX PC Paintbrush file format.

File format enhancements
	-  PBM restructured to treat each file type as a new file format.
	-  PICT enhanced to include more drawing opcodes.
	-  PostScript enhanced to generate grayscale and color PostScript files.
	-  Sun Rasterfiles enhanced to support 32-bit images.
	-  XWD enhanced to support 24-bit RGB images.

File format bug fixes
	-  HDF "NT" tag changed to 'bitwise numeric' from 'ASCII'.
	-  IFF alpha channel write fixed.
	-  PBM monochrome black-and-white reversal fixed.
	-  PIC problem with finding start of data in files fixed.
	-  PICT occasional core dump from memory problem fixed.
	-  RAS 24-bit code reversed to byte order B-G-R from R-G-B.
	-  TIFF problem with mono images not multiple of 8-pixels wide fixed.
	-  TIFF alpha channel write fixed.
	-  X alpha channel write fixed.
	-  Monochrome-to-RGB incorrect mapping of white to (1,1,1) fixed.

Removed features
	-  CGM support removed.
	-  HDF write of compressed 24-bit images temporarily removed.
	-  Alliant FX/80 no longer supported.

Released for hosts
	-  Alliant FX/80
	-  Alliant FX/2800
	-  Cray-2
	-  Cray Y-MP
	-  DECStation
	-  DEC VAX
	-  IBM RS/6000
	-  NeXT
	-  SGI 4D
	-  Stardent
	-  Sun 3
	-  Sun 4
