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Documentation
-------------

Fixes bugs:
	- An installation directory name was wrong.  (make.txt,
unix-lpr.txt)
	- A URL was wrong.  (devices.txt)
	- A reference to use.doc hadn't been updated.  (gs.1)
	- Some references to /usr/local/lib hadn't been updated.  (gs.1)
	- The NEWS file and history* files still referred to *.doc rather
than *.txt.  (NEWS, history*.txt)

Adds a note about compilation on Digital Unix.  (make.txt)

Clarifies that calling gs_exit calls gs_finit automatically.  (imain.h)

Adds a pointer to the PDF encryption patch.  (Ridiculous U.S. export control
laws don't allow including the patch itself in the main fileset.)
(new-user.txt)

Adds a help file for VMS.  (gs-vms.hlp)

Procedures
----------

Fixes bugs:
	- vms.mak had gotten out of sync with the makefiles (again).
(vms.mak)
	- DEVICE{WIDTH,HEIGHT}POINTS didn't override PAPERSIZE.
(gs_init.ps)
	- The Microsoft C makefiles had gotten out of date.  (msc.mak)

The (few) GNU-Licensed drivers were accidentally omitted from the fileset.

Modifies a makefile for greater reusability.  (watclib.mak)

Adds a 'debug' target for making Unix debugging configurations.
(unix-end.mak)

Utilities
---------

Fixes bugs:
	- Some uses of 'run' should be changed to runlibfile.  (bdftops.ps,
impath.ps, markhint.ps, packfile.ps, showchar.ps, waterfal.ps, wftopfa.ps,
wrfont.ps)
	- Some debugging code hadn't been removed.  (gslp.ps)

Adds a new utility, viewcmyk.ps, for viewing 4-bit CMYK data.  (psfiles.txt,
unix-end.mak, viewcmyk.ps)

Improves pdf2dsc by including Title and CreationDate DSC comments (these are
displayed by Ghostview) and reducing the size of typical output files by a
factor of about 3.  (pdf2dsc.ps)

Incorporates major changes (claimed to be improvements) to ps2ascii
contributed by a user.  If you have problems with it, please contact him,
not Aladdin.  (ps2ascii.ps)

Platforms
---------

Fixes bugs:
	- The X value of a bounding box could be computed incorrectly.
(gdevbbox.c)

Platforms
---------

Fixes bugs:
	- The Windows DLL sometimes didn't clean up properly.  (dll.txt,
dpmainc.c, dwdll.cpp, dwmain.cpp, dwmainc.cpp, gsdll.c, gsdll.h)

Interpreter
-----------

Fixes bugs:
	- Reading from a filter could hang forever, because a buffer was
allocated 1 byte too small.  (zfilter.c)
	- The search path could become garbage under some circumstances.
(imain.c)
	- A dangling reference to a stack-allocated variable could corrupt
memory if a client mixed interpreter calls and direct C calls.  (interp.c)
	- Printing an object to a procedure-based filter could cause an
invalid memory access.  (zfileio.c)

Library
-------

Fixes bugs:
	- Setting parameters for an unopened device could cause an access
error or invoke the wrong put_params procedure.  (gsdparam.c)
	- Reading from a filter could hang forever, because a buffer was
allocated 1 byte too small.  (stream.h)
	- If the current device was the nullpage device, doing a [g]save,
selecting a different device, and doing a [g]restore caused an error.
(gsdparam.c)

Adds the ability to append arcs without the initial lineto, for PCL
emulation.  (gspath.h, gspath1.c)

Version 4.0 (6/28/96)
===========

This is the first public release since 3.53, with a few more last-minute
patches beyond 3.70.

Documentation
-------------

Fixes bugs:
	- Many makefiles still referred to .doc files rather than .txt.
(cfonts.mak, devs.mak, gs.mak, int.mak, libpng.mak, unix-end.mak, watc.mak,
watcwin.mak, wccommon.mak, zlib.mak)
	- Some FONTPATH-related information was out of date.  (use.txt)
	- The installation directory for fonts was incorrect.  (install.txt)
	- The libpng and zlib versions were out of date.  (libpng.mak,
zlib.mak)
	- Some information about GSview was incorrect or incomplete.
(new-user.txt)
	- make.txt said it described installation as well as building.
(make.txt)

Notes that the current release of zlib won't compile and link correctly with
Sun cc.  (make.txt)

Adds a little more detail to the C style document.  (c-style.txt)

Procedures
----------

Fixes bugs:
	- Some documentation files weren't installed.  (unix-end.mak)
	- Some dependencies were incorrect.  (bcwin32.mak)
	- 'make begin' and 'make clean' deleted too many and/or the wrong
files.  (bcwin.mak, bcwin32.mak)
	- libpng.mak didn't work with libpng version 0.89c.  (libpng.mak)
	- -d<var>=<name> was equivalent to -d<var>=/<name>, and there was no
way to set a variable to true, false, or null.  (use.txt, gs_init.ps,
iinit.c, imainarg.c)

Removes the modules.lis file, which is no longer used.

Undoes detecting automatically the need to run tar_cat -- the mechanism
didn't work, and caused confusion.  (unix-end.mak)

Updates the makefiles to libpng version 0.89, but allows them to work with
either 0.88 or 0.89.  (*.mak)

Utilities
---------

Fixes bugs:
	- Showing the details of a protected font caused an error.
(markhint.ps)

Drivers
-------

Fixes bugs:
	- A copyright notice was wrong.  (gs_pdfwr.ps)
	- PDF link annotations could get written with two Dest keys.
(gdevpdfm.c)
	- MakeProcInstance and FreeProcInstance were called on platforms
where it wasn't appropriate.  (gdevwpr2.c, gdevwprn.c, gp_mswin.c)
	- On X servers that return very large values for the "virtual
screen" size in millimeters but correct values for the screen size in
pixels, a rangecheck could occur.  (gdevxini.c)
	- The bounding box device could return garbage if stroke or fill was
ever invoked with an empty path.  (gdevbbox.c)

Replaces the LBP8 driver with a revised one contributed by a user.
(gdevlbp8.c, devs.mak)

Platforms
---------

Fixes bugs:
	- Some Windows menu parameters were incorrect.  (gsdll16.rc,
gsdll32.rc)

Interpreter
-----------

Fixes bugs:
	- .getdevparams sometimes returned duplicate entries for /Type.
(ziodev2.c)
	- File names weren't parsed or concatenated properly on all
platforms.  (gs_fonts.ps, zfile.c)
	- Filter lookahead caused problems with special files.  (zfproc.c)
	- If a TransformPQR procedure in a CIE color rendering dictionary
didn't pop its 4 array arguments, an error occurred.  (gs_lev2.ps, zcrd.c)

Streams
-------

Fixes bugs:
	- Filter lookahead caused problems with special files.  (bug
introduced in 3.70) (stream.h)

Library
-------

Fixes bugs:
	- .getdevparams sometimes returned duplicate entries for /Type.
(gxiodev.h, gsiodev.c)

Version 3.70 patch 1 (6/24/96)
====================

This contains a few last-minute patches before the release.

Procedures
----------

Comments out the color inkjet drivers in the cc-based makefile, because a
bug in Sun's cc prevents them from compiling.  (cc-head.mak)

Drivers
-------

Fixes bugs:
	- The os2prn driver smashed memory.  (gdevos2p.c)
	- Some initialized structures weren't declared 'static'.
(gdevpdf.c, gdevpdfm.c)
	- The PNG driver wouldn't compile with some older versions of the
PNG library.  (gdevpng.c)

Version 3.70(limited) (6/23/96)
=====================

This is the candidate fileset for 4.0.  Aside from one optimization for the
PDF writer, the only changes are bug fixes.

Documentation
-------------

Renames all the documentation files from *.doc to *.txt, since the .doc
extension didn't give any information about the format of the file.
(readme, *.doc, *.txt)

Notes that IJG JPEG library v6[a] is now required.  (jpeg.mak)

Brings ps2pdf.1 up to date.  (ps2pdf.1)

Adds a new file describing Aladdin's C coding practices.  (c-style.txt)

Updates the man pages to refer to version 4.0.  (gs.1, pdf2ps.1, ps2ascii.1,
ps2pdf.1)

Procedures
----------

Changes some file names to fit within the MS-DOS 8.3 limit.  (gs.mak)

Adds the PDF writer to the remaining 32-bit configurations (Watcom, OS/2,
MSC).  (watc.mak, watcwin.mak, os2.mak, msc.mak, msvcwint.mak)

Changes the -sFONTMAP= switch so it can take a list of font names, like a
search path.  (use.txt)

Drivers
-------

Fixes bugs:
	- Signed and unsigned values were mixed inconsistently.  (gdevcdj.c)
	- PDF files could contain e-format floating point numbers, which the
PDF specification doesn't allow.  (gdevpdfx.h, gdevpdf*.c)
	- The PDF writer didn't handle glyphshow properly.  (gs_pdfwr.ps)
	- The PDF writer did the wrong thing with fonts whose FontMatrix had
a non-zero translation component.  (gs_pdfwr.ps, gdevpdft.c)
	- The stand-alone bounding box device could crash when setting
parameters.  (gdevbbox.c)
	- The mswinpr2 driver smashed memory.  (gdevwpr2.c)

Changes the PDF writer so that if it encounters a re-encoded character, it
tries to map it to an encoded character in the standard (ISO Latin-1)
encoding rather than converting the entire string containing it to a bitmap.
This dramatically improves output file size for files with a few divergently
encoded characters, but it may cause the text in the PDF file to differ from
the text in the PostScript input.  (gdevpdft.c)

Disallows BitsPerPixel=16 in the MS Windows and OS/2 drivers, since this bit
depth is not supported by Windows and would require special extra buffering.
(install.txt, dwtext.h, dwtext.cpp, gdevmswn.c, gdevpm.c, gdevwpr2.c)

Platforms
---------

Fixes bugs:
	- On the PC platforms, file names weren't changed to reflect the
value of CONFIG.  (gs.mak, bc*.mak, ms*.mak, os2.mak, tc*.mak, watc*.mak,
wccommon.mak)

Modifies some makefiles for greater reusability.  (bclib.mak, watclib.mak)

Fonts
-----

Changes the font searching rules in the following NON-BACKWARD-COMPATIBLE
way: (gs_fonts.ps, gs_res.ps)
	- -sFONTMAP=files specifies a list of files containing fontmaps;
previously, it specified only a single fontmap file.
	- If -sFONTMAP= is not used, the interpreter reads the Fontmaps from
*all* directories on the search path, and does so even if FONTPATH or
GS_FONTPATH is set; previously, it read only the first Fontmap, and only if
[GS_]FONTPATH was not set.
	- Fontmap(s) take precedence over [GS_]FONTPATH; previously,
[GS_]FONTPATH caused Fontmap to be ignored.  (You can still force Fontmap to
be ignored with -dNOFONTMAP.)
	- Earlier [GS_]FONTPATH entries take precedence over later;
previously, later entries took precedence over earlier.  Note that this is
different from Fontmap: earlier Fontmaps in the search path take precedence
over later, but within a single Fontmap, later entries take precedence over
earlier (for backward compatibility).
	- [GS_]FONTPATH is consulted only if there is no Fontmap entry for a
font, or no Fontmap entry leads to successful loading; previously,
[GS_]FONTPATH was always consulted at startup.
	- If loading a font fails, the interpreter tries the next Fontmap
entry; previously, it fell back to font substitution.

Interpreter
-----------

Fixes bugs:
	- Filters didn't peek ahead for an EOD (see Streams below).
(zfileio.c, zpaint.c)

Splits up a file to allow internal access to user and system parameters even
in Level 1.  (zmisc2.c, zusparam.c)

Adds LIBPATH as a predefined name in systemdict.  Its value is an array of
strings comprising the library search path.  (imain.c)

Interpreter (PDF)
-----------------

Fixes bugs:
	- A Dests dictionary entry with an array (rather than a dictionary)
value caused an error.  (pdf_main.ps)
	- Rotated pages could have incorrect translation and/or clipping.
(pdf_main.ps)

Streams
-------

Fixes bugs:
	- If a buffer boundary fell just before an EOD, and the client read
exactly as much data as was present before the EOD, filters didn't consume
the EOD.  (This is required as a tricky consequence of the Adobe
specification.)  (stream.h, strimpl.h, stream.c)

Library