History of Ghostscript versions 5.n

Table of contents

This document is a record of changes in Ghostscript releases numbered 5.n. For earlier versions, see the the history documents:

History of Ghostscript versions 4.n
History of Ghostscript versions 3.n
History of Ghostscript versions 2.n
History of Ghostscript versions 1.n

For other information, see the Ghostscript overview.

Within each release, news appears in the following order: Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, Fonts, Interpreter, Streams (included under Interpreter through release 2.9.9), Library. Changes marked with a * were made available as patches to a previous release.

Version 5.99 (beta) (1999-12-18)

Incompatible changes


(Procedures)
	- All platform-specific makefiles must now define the Q macro.
	- Ghostscript now exits with an error status if an error occurs in a
file named on the command line, a -c command, or piped input.
(Utilities)
	- ps2epsi now disables setpagedevice: the bounding box of the EPSI
output file is recorded only in the %%BoundingBox comment.
(Drivers)
	- The return type of gdev_vector_close_file is changed from void
to int.
(Interpreter)
	- The name of the predefined stochastic halftone is changed to
StochasticDefault.  (This change was actually made in 5.98.)
	- The compht feature is replaced by stocht.
	- Font searching now looks in FontResourceDir.
	- The ASCIIHexEncode filter now produces upper-case output.
(Library)
	- The type returned by compiled halftone resource access procedures
is changed.

Documentation


Fixes problems:
	- A stray character had gotten added to the beginning of a file.
(doc/Use.htm)
	- Many minor HTML errors had crept in.  (doc/*.htm, doc/gsdoc.el)

Updates the docmentation on the mswinpr2 driver.  (doc/Devices.htm)

Notes that GNU make currently does not work on OpenVMS.  (doc/Make.htm)

Documents the fact that x/y_pixels_per_inch are deprecated.  (gxdevcli.h)

Documents certain bugs in ps2pdf.  (doc/Ps2pdf.htm)

Documents the addition of FontResourceDir to the font search process.
(doc/Use.htm)

Documents the new arrangement for B paper sizes.  (doc/Psfiles.htm,
doc/Use.htm, doc/gs-vms.hlp, man/gs.1)

Removes the "under development" warning from the text API and
get_bits_rectangle documentation, and adds a little more detail.
(doc/Drivers.htm)

Adds new user-contributed documentation for installing and using Ghostscript
fonts with X Windows.  (doc/Fonts.htm, doc/Readme.htm, doc/Use.htm)

Adds building with the Watcom compiler to the release process.
(doc/Release.htm)

Adds an "Improving performance" section to the user documentation.
(doc/Use.htm)

Adds a note to the C style guide about order of evaluation.
(doc/C-style.htm)

Documents the new stocht.ps file.  (doc/Psfiles.htm)

Procedures


Fixes problems:
	- A missing dependency caused builds on certain platforms to fail.
(int.mak)
	- $(EXP) was missing before various utility invocations.  (int.mak)
	- VMS converts all unquoted arguments to lower case.  In order to
work around this, we have added a platform-specific makefile macro Q, which
is defined as a quote mark on VMS and as an empty string on all other
platforms, and used it to quote the few mixed-case values in the makefiles.
We removed the obsolete QQ macro from os2.mak as well.  (cfonts.mak,
dvx-head.mak, int.mak, openvms.mak, openvms.mmk, os2.mak, unixhead.mak,
wccommon.mak, winlib.mak)
	- PSRCDIR was incorrectly referenced as PNGSRCDIR in one place.
(all-arch.mak)
	- winint.mak had a conditional that Watcom's make program didn't
accept.  (winint.mak)

Adds a makefile entry to allow compilation with libpng 1.0.5.  (libpng.mak)

Updates the Borland C++ makefile to work with C++Builder 4.  (bcwin32.mak)

Updates the Unix installation makefile to install stocht.ps.  (unixinst.mak)

Utilities


Fixes problems:
	- ps2epsi didn't disable setpagedevice.  (lib/ps2epsi)
	- geninit needed <stdlib.h> for 'exit'.  (geninit.c)
	- Some invocations of utilities didn't deal with VMS's habit of
converting arguments to lower case.  (geninit.c, cfonts.mak)
	- The ps2pdf*.bat files didn't produce a usage message if no
arguments were provided.  (lib/ps2pdf.bat, lib/ps2pdf12.bat,
lib/ps2pdf13.bat)
	- Removes some warnings from the Windows uninstaller.
(dwuninst.cpp)

Upgrades the halftone compiler to handle Type 5 halftones.  (genht.c)

Makes the initialization string compiler recognize sections of the code
where binary tokens are allowed, and convert literal hex strings within such
sections to binary-token strings, which take less space and load faster.
(geninit.c)

Adds a utility file to define b0 ... b6 as selecting JIS B paper sizes.
(unixinst.mak, lib/jispaper.ps)

Modifies the font printing utility to sort unencoded characters.
(lib/prfont.ps)

Adds a small utility to help use the StochasticDefault halftone.
(lib/stocht.ps)

Drivers


Fixes problems:
	- The output of the epswrite driver couldn't be embedded in another
file, because it assumed it was invoked with an empty operand stack.
(gdevps.c)
	- "Vector" drivers didn't detect I/O errors such as filling up the
disk.  (gdevvec.h, gdevpdf.c, gdevps.c, gdevpx.c, gdevvec.c)
	- The bookkeeping for image color spaces when banding was incorrect,
possibly causing memory access errors.  (gxclist.h, gxclimag.c, gxclist.c)
	- The cljet5 driver didn't place the image on the page correctly.
(gdevclj.c)
	- 16-bit X11 devices with R/G/B widths other than 5/6/5 sometimes
failed to map colors correctly.  (gdevxcmp.h, gdevxcmp.c)
	- The cljet5c driver omitted a needed cast.  (gdevcljc.c)

Adds new x11rg16x and x11rg32x devices to test X Windows with unusual pixel
layout.  (devs.mak, gdevxalt.c)

Works around a bug in Acrobat Distiller 4 (and perhaps some other PostScript
interpreters) that causes an error if CCITTFaxDecode with /EndOfBlock = true
is given data with no EOB (terminated by the end of the data stream
instead).  (gdevps.c)

Platforms


Fixes problems:
	- The absence of mktemp on the Watcom platform caused a linking
error under Windows.  (watc.mak, watcw32.mak, gp_iwatc.c, gp_mktmp.c)

Fonts


Fixes problems:
	- findfont, /Font resourcestatus, and /Font resourceforall weren't
consistent.  (lib/gs_fonts.ps, lib/gs_res.ps)
	- Very large TrueType fonts caused a stackoverflow.  (lib/gs_ttf.ps)

PDF writer


Fixes problems:
	- Errors in pdfmark and setdistillerparams were ignored (!).
(lib/gs_pdfwr.ps)
	- The PUT pdfmark didn't allow adding dictionaries to stream-type
objects.  (The pdfmark documentation says this isn't allowed, but we think
this is an oversight, since it is reasonable and unambiguous and Acrobat
Distiller allows it.)  (gdevpdfm.c)
	- The token scanner used to substitute object names in pdfmark
parameters sometimes added an extra character on the end.  (gdevpdfr.c)
	- ashow and [a]widthshow produced incorrect text spacing.  (bug
introduced by an optimization in 5.97) (gdevpdft.c)
	- setdistillerparams left its argument on the stack.
(lib/gs_pdfwr.ps)
	- 0-height images caused errors either at conversion or at rendering
time.  (gdevpdfi.c)
	- If the FontMatrix included a translation component, text was
positioned incorrectly.  NOTE: this fix may not handle x/y/xyshow.
(gdevpdft.c)
	- Out-of-range user-space coordinates could get generated for
rectangles.  NOTE: they can still get generated for general paths.
(gdevpdfd.c)
	- Widths weren't written for renamed built-in fonts.  We fixed this
partly by improving the algorithm for recognizing built-in fonts.
(gdevpdff.h, gdevpdff.c, gdevpdft.c)

Works around the Acrobat limitation that user-space coordinates must not
exceed 32K.  (fix from Artifex) (gdevpdfp.c)

Works around an Acrobat Reader 3 bug with printing files including Type 3
fonts: with the "Download Fonts Once" option, AR3 only emits the font subset
referenced on the first page where the font appears.  (gdevpdfx.h,
gdevpdf.c, gdevpdft.c)

Interpreter (PDF)


Fixes problems:
	- Type 3 fonts weren't handled properly as a marking context, so if
a CharProc referenced a resource in the font, an error would occur.
(lib/pdf_fonts.ps)
	- 0-height images caused an error.  (lib/pdf_draw.ps)

Interpreter


Fixes problems:
	- Errors weren't propagated properly.  (bug introduced in 5.98 by
enhanced error recovery code) (imainarg.h, gs.c, imainarg.c)
	- Errors in -c commands or in files named on the command line
sometimes allowed execution to continue, and did not terminate with an
abnormal status.  (lib/gs_init.ps)

Changes the binary token scanner so that if the stream buffer is in foreign
space, binary-token strings will not be copied, but will be referenced
directly in the buffer.  This parallels what is done for name strings.
(iscanbin.c)

Changes the stochastic halftone from multiple Type 3s to a Type 5.
(lib/ht_ccsto.ps, int.mak)

Replaces the compht feature with a new feature called stocht.  If this
feature is selected, the StochasticDefault halftone resource will be
pre-loaded into Ghostscript.  If COMPILE_INITS=1, all the halftone data
(threshold array, order and bits arrays) will be efficiently compiled into
the executable.  (int.mak)

Replaces (...\n) print with (...) = everywhere.  (lib/gs_cmdl.ps,
lib/gs_fonts.ps, lib/gs_init.ps, lib/gs_setpd.ps, lib/pdf_base.ps,
lib/pdf_font.ps, lib/pdf_main.ps, lib/pdf_sec.ps)

Adds support for JIS B paper sizes: statusdict will now include isob0..6 and
jisb0..6 operators, with b0..6 normally aliased to the former.
(lib/gs_statd.ps, lib/jispaper.ps)

Adds a b5tray procedure; limits the valid arguments for setpagetype to the
Adobe-defined values 0 and 1.  (lib/gs_statd.ps)

Updates clients for the change in the gs_image_* API.  (zimage.c)

Makes the default halftone lookup procedure more reasonable.
(lib/gs_init.ps, lib/gs_ll3.ps)

Streams


Fixes problems:
	- An error condition when closing a file stream wasn't reported
properly.  (sfxfd.c, sfxstdio.c)

For greater Adobe compatibility, changes the ASCIIHexEncode filter to
produce upper-case output.  (sstring.c)

Library


Fixes problems:
	- The gs_image_* API didn't work for ImageType 3 images.  Fixing
this required a small (but backward-compatible) API change.  (fix mostly
provided by Artifex)  (gsimage.h, gsimage.c)
	- The change in the bbox device in 5.95 broke it for the case where
it was being used in a pipeline.  (gdevbbox.c)
	- A possible overflow wasn't detected when stroking lines with very
large coordinates.  (gxstroke.c)
	- A mask was sized incorrectly.  (gsdcolor.h)

Updates the runtime support for compiled halftones.  (gxdhtres.h, gscdefs.h,
gconf.c, gxclrast.c, gxhtbit.c)

Replaces all references to the now-deprecated x/y_pixels_per_inch with
HWResolution[0/1].  (gsdevice.c, gxclist.c, gxpcmap.c)

Version 5.98 (beta) (1999-12-01)

Incompatible changes


(Library)
	- The return type of init_proc is changed from void to int.
	- The return types of gs_lib_init* are changed from void to int.
(Interpreter)
	- The return types of gs_[main_]init*, gs_[main_]add_lib_path,
gs_[main_]set_lib_paths, and a number of internal initialization-related
procedures are changed from void to int.

Documentation


Improves the documentation of the clist_render_rectangle procedure.
(gxclist.h)

Makes it clear that pre-public-release filesets should not be redistributed.
(doc/Tester.htm)

Clarifies that the parameters for the X driver are command line switches,
not X resources.  (doc/Use.htm)

Improves the documentation of ps2pdf in response to some user comments.
(doc/Ps2pdf.htm)

Documents the initial settings of the distiller parameters.
(doc/Ps2pdf.htm)

Documents the UniqueIDs assigned to Aladdin.  (lib/gs_fonts.ps)

Updates the documentation for the stochastic halftone mask.  (doc/Make.htm)

Removes some obsolete material.  (doc/Release.htm)

Procedures


Fixes problems:
	- The new ps2pdf* scripts weren't included in the Unix install list.
(unixinst.mak)
	- The directory names were missing in BEGINFILES.  (openvms.mak)
	- The .pl and .sh scripts weren't included in the Unix install list.
(unixinst.mak)

Updates all-arch.mak with a newer version from its contributor.
(all-arch.mak)

Updates the makefiles for a change in eexec modularization.  (devs.mak,
int.mak, lib.mak)

Utilities


Fixes problems:
	- The dvipdf usage message was incorrect.  (lib/dvipdf)

Adds a utility for mechanically adding the Adobe extended Latin characters
(primarily Central European accented letters) to a font.  Eventually we
would like to integrate this into the font loader and/or make extended
versions of the standard 35 fonts.  (lib/addxchar.ps)

Drivers


Fixes problems:
	- psdf_sorted_glyphs_include didn't handle empty lists correctly.
(gdevpsdf.c)
	- A reference to a #defined constant hadn't been converted to upper
case.  (gdevpsdf.h)
	- Acrobat Reader couldn't handle <> as the definition of
Notice in an embedded font's FontInfo dictionary: it requires a () 
string. (gdevpsd1.c)
	- The [e]pswrite driver didn't take stroked paths into account when
computing the bounding box.  (gdevps.c)

Updates gdevwpr2.c with a new version from its most recent author.
(gdevwpr2.c)

Fonts


Fixes problems:
	- The FONTPATH file scanner wasn't protected against errors.
(lib/gs_fonts.ps)
	- Some badly designed Chinese TrueType fonts, whose 'post' table
gives the name .null to all glyphs, didn't work properly.  (lib/gs_ttf.ps)
	- The shareware Katakana font had an incorrect UniqueID.
(fonts/fkarw.gsf)

Adds all of the PostScript 3 fonts to the intelligent substitution tables.
(lib/gs_fonts.ps)

Changes the FONTPATH scanner to allow a %%BeginFont: line as the first line
of a font.  Nothing in Adobe's documentation suggests that this is
acceptable, but some fonts have it.  (lib/gs_fonts.ps)

Releases an updated set of the URW fonts, fixing the braceleftbt problem in
the Symbol font and a couple of missing characters in the ZapfDingbats
fonts, and adding the Euro glyph to the alphabetic fonts.  The new archive
also includes fonts.scale and fonts.dir files for use with X Windows
(mkfontdir and xfs).

Centralizes the definition of Aladdin's XUIDs.  (lib/gs_fonts.ps,
lib/gs_ttf.ps)

PDF writer


Fixes problems:
	- The algorithm for making font names unique didn't take subset
prefixes into account.  (gdevpdff.h, gdevpdff.c, gdevpdfw.c)
	- Computing character bounding boxes was taking an inordinate amount
of time.  (performance problem only) (gdevpdff.c)
	- The pdf_image_writer and pdf_image_enum structures didn't have GC
descriptors, possibly causing memory corruption.  (gdevpdfi.c)
	- PostScript files containing images with premature end-of-data were
converted to PDF files with premature end-of-data, which Acrobat doesn't
accept. (gdevpdfo.h, gdevpdfx.h, gdevpdfi.c, gdevpdfo.c, gdevpdfu.c)
	- Pattern resources whose image was written in-line omitted a needed
gsave (q).  (bug introduced in 5.94) (gdevpdfi.c)
	- The similarity between a font and a base font wasn't computed
correctly, leading to some unnecessary writing of Widths for standard fonts.
(gdevpdft.c)
	- Embedding a stream in the psdf_binary_writer caused garbage
collector problems, because there could be pointers to that stream from
elsewhere.  (gdevpsdf.h, gdevpsdf.c)
	- The algorithms for deciding whether a font was script or serif
were very inaccurate.  (The revised ones are only somewhat better.)
(gdevpdff.c)
	- Re-encoded characters in subset fonts weren't handled correctly.
We work around this by writing the entire font if the character doesn't
appear in the font's encoding.  This is inefficient but will always produce
correct output.  (gdevpdff.h, gdevpdff.c, gdevpdft.c, gdevpdfw.c)
	- The meaning of bit 6 in the Flags was supposed to have changed in
PDF 1.2, but didn't.  (gdevpdff.h, gdevpdff.c, gdevpdfw.c)
	- The Widths array didn't get written out for embedded subsets of
the built-in fonts.  (gdevpdfw.c)
	- Planar images weren't handled correctly, and could cause memory
corruption.  (gdevpdfi.c)
	- Patterns still weren't scaled correctly; in fact, the "fix" in
5.94 can't possibly have worked, and we don't understand why it seemed to.
(gdevpdfi.c)

Recants the belief that the default encoding for embedded fonts is
StandardEncoding (see 5.95): the appearance of this was a symptom of having
multiple fonts with the same name.  (gdevpdft.c)

Removes FONT_EMBED_UNKNOWN, which is meaningless (a decision is always made
about whether to embed a font).  (gdevpdff.h, gdevpdff.c, gdevpdft.c)

Changes the algorithm for picking the base font so that it produces more
efficient output for certain cases of re-encoded fonts.  (gdevpdft.c)

Interpreter (PDF)


Fixes problems:
	- Fonts were getting renamed unnecessarily.  (performance and PDF
output size problem only) (lib/pdf_font.ps)
	- Fonts with Widths but no FontDescriptor caused an error.
(lib/pdf_font.ps)
	- TrueType fonts processed the Encoding key in the font the same way
as other font types, which is not correct.  (lib/pdf_font.ps)
	- For embedded Type 3 fonts, the Widths entry in a font didn't
override the width in the CharProc.  (lib/pdf_font.ps, lib/pdf_ops.ps)
	- If a page had multiple Contents streams, and one of the streams
ended with values on the operand stack, an error might occur.
(lib/pdf_main.ps)
	- Ts and Tz within a text object didn't take effect immediately.
(lib/pdf_ops.ps)
	- sc[n] and SC[N] could cause an error because Do left an extra item
on the stack temporarily.  (lib/pdf_draw.ps)

Interpreter


Fixes problems:
	- Getting the unscaled outline for a Type 1 font didn't disable
hinting.  (mostly a performance problem) (zchar1.c)
	- Error conditions during initialization weren't recognized.  Fixing
this required changing various return types from void to int.  (ialloc.h,
iinit.h, imain.h, interp.h, ialloc.c, iinit.c, imain.c)
	- HalftoneMode didn't affect setscreen or setcolorscreen.
(lib/gs_init.ps, lib/gs_ll3.ps)

Makes the interpreter quit with a message, rather than a stack dump, if it
can't open the initial device and DEBUG is not set.  (lib/gs_init.ps)

Adds .setlimitclamp and .currentlimitclamp operators to access the limit
clamp flag in the graphics state.  (zgstate.c)

Changes the names of the stochastic halftone mask to be more descriptive.
(lib/ht_ccsto.ps, int.mak, unixinst.mak)

Streams


Adds the ability to forbid using hex encoding when writing strings.
(spsdf.h, spsdf.c)

Library


Fixes problems:
	- Computing the width of a glyph unnecessarily constructed the
entire outline.  (performance problem only) (gxtype1.c)
	- Getting the unscaled width of a glyph in a Type 1 font didn't
disable hinting.  (mostly a performance problem) (gxtype1.c.)
	- The "unknown device" GC descriptor is no longer used.  (gsdevice.c)
	- Some compilers *still* complained about end-of-loop code not being
reached.  (gxpath2.c)
	- Mixing float and double values sometimes caused spurious lines to
be drawn when stroking very short lines with large widths.  (fix from
Artifex) (gxpdash.c)
	- The code for handling crossing lines in the path filling algorithm
sometimes computed line crossings incorrectly, causing excessive
computation.  (gxfill.c)
	- When oversampling for anti-aliasing, the flatness parameter was
not scaled, leading to unnecessarily accurate curve rendering.  (gspaint.c)
	- An extra grestore in a Pattern PaintProc could cause a crash.
(gxpcmap.c)
	- Error conditions during initialization weren't recognized.  Fixing
this required changing the return type of init_proc, and various other
internal procedures, from void to int.  (std.h, gslib.h, gscdefs.h,
gshtscr.c, gsiodev.c, gslib.c, gsutil.c)

Splits off the Type 1 encryption/decryption code into a separate file for
sharing with the eexec streams.  (gscrypt1.c, gxtype1.c)

Version 5.97 (beta) (11/22/99)

This is the next beta for 6.0. We believe the pdfwrite driver (ps2pdf) now finally produces Acrobat-acceptable output, with reasonable handling of fonts, and have also fixed the problem with high-level image banding. We are cautiously hopeful that this is a "real" beta candidate.

Incompatible changes


(Drivers)
	- The default CompatibilityLevel in the pdfwrite driver is now back
to 1.3.
(Library)
	- The seac_data procedure of a Type 1 font must now be able to
return the glyph and/or the actual outline data.

Documentation


Fixes problems:
	- A <br> was missing.  (doc/Release.htm)
	- The final step of copying releases to www.aladdin.com was missing.
(doc.Release.htm)

Documents the new situation with the ps2pdf* scripts.  (doc/Ps2pdf.htm)

Documents the simplification of the pthreads code.  (doc/Helpers.htm,
doc/Make.htm)

Adds a requirement to the license that modifications include the name and
e-mail address of the author, and the date and purpose of the modification.
(doc/Public.htm)

Adds a link to the documentation for setdistillerparams.  (doc/Ps2pdf.htm)

Procedures


Fixes problems:
	- On OpenVMS, the test for whether the bin and obj subdirectories
already existed was incorrect.  (openvms.mak, openvms.mmk)
	- The recently updated Borland/Inprise makefile deleted some temp
files prematurely.  (bcwin32.mak)
	- The dependencies for the Unix install-scripts and install-data
targets were incorrect.  (unixinst.mak)

Updates the RPM spec files.  (gs.rps, gs-fonts.rps, rpm-conf.dif)

Adds support for compilation with Borland/Inprise C++Builder 3.
(bcwin32.mak, winint.mak)

Adds a note on font installation under Red Hat Linux 6.  (doc/Install.htm)

Utilities


Adds ps2pdf12 and ps2pdf13 scripts to select the PDF output level
explicitly; makes ps2pdf a wrapper for ps2pdf12.  (lib/ps2pdf,
lib/ps2pdf.bat, lib/ps2pdf12, lib/ps2pdf12.bat, lib/ps2pdf13,
lib/ps2pdf13.bat, lib/ps2pdfwr, lib/ps2pdfwr.bat)

Updates the Windows install/setup program to display the Aladdin start menu
folder on a successful install, so that the user gets some feedback that all
went well.  (dwinst.cpp, dwsetup.cpp)

Drivers


Fixes problems:
	- The lj5{mono,gray} drivers didn't send the page size to the
printer.  (gdevpxut.h, gdevlj56.c, gdevpx.c, gdevpxut.c)
	- The pxl drivers didn't handle out-of-range points properly.
(gdevvec.c, gdevpx.c)
	- The bmpa drivers didn't produce multi-page output files correctly
-- all pages but the first were blank.  (The bmp format is supposed to be
single-page, but at least some readers handle multi-page files correctly.)
(gdevbmpa.c)
	- The code for writing embedded TrueType fonts was broken.  (bug
probably introduced in 5.9x) (gdevpsdt.c)

Removes an unused variable.  (gdevbmpa.c)

Platforms


Replaces the 4 pthreads files, which included a dependence on the non-POSIX
<semaphore.h>, with a single file that uses only pthreads procedures.
(gp_psync.c, gp_posem.c [deleted], gp_pthr.c [deleted], gp_ptsem.c
[deleted], gp_semon.c [deleted])

PDF writer


Fixes problems:
	- Whether or not to write the Widths array was implicit in the data
structures rather than explicit, so it was sometimes written unnecessarily.
(gdevpdfx.h, gdevpdff.c, gdevpdft.c)
	- Fonts based on the 14 built-in fonts didn't set BaseFont to the
name of the built-in font.  (gdevpdff.c)
	- The determination of whether a glyph was available was incorrect
for embedded fonts, leading some glyphs to be turned into bitmaps
unnecessarily.  (gdevpdft.c)
	- Apparently Acrobat Reader gets confused if different subsets of
the same font have different FirstChar and LastChar values, so we have to
write the full Widths array each time.  (gdevpdfx.h, gdevpdff.c, gdevpdft.c)
	- A structure member wasn't initialized when processing pdfmark
annotations, possibly causing a memory access error.  (gdevpdfm.c)
	- The typedef for gx_device_pdf had a typo.  (gdevpdfx.h)
	- Each embedded font subset had its own FontDescriptor and its own
font data, confusing Acrobat Reader.  Fixing this required sharing
FontDescriptors among multiple fonts and making FontDescriptors
pseudo-resources.  (gdevpdff.h, gdevpdfx.h, gdevpdf.c, gdevpdff.c,
gdevpdft.c, gdevpdfw.c)
	- Incrementally defined embedded Type 1 fonts didn't write out
correct Widths.  (gdevpdff.c)
	- PDF resources didn't consistently record the gs_id of the
structure they represented, possibly causing resources to be duplicated
unnecessarily.  (gdevpdff.c, gdevpdfu.c)

Reinstates PDF text output.  (gdevpdf.c)

Changes the default CompatibilityLevel in the pdfwrite device back to 1.3,
since the ps2pdf scripts now make it easy to choose the PDF level.
(gdevpdf.c)

When possible, uses the widths obtained from the font, rather than the
default implementation of text_process, to complete the text_process
operation.  This greatly speeds up the conversion process.  (gdevpdft.c)

Allows character remapping (but not reencoding) of TrueType fonts.
(gdevpdft.c)

Factors the definitions for cos objects and font-related objects into header
files more thoroughly.  (gdevpdff.h, gdevpdfo.h, gdevpdfx.h, gdevpdf.c,
gdevpdff.c, gdevpdfi.c, gdevpdfm.c, gdevpdfr.c, gdevpdft.c, gdevpdfu.c)

Makes the names of some structure elements correspond more directly to keys
in PDF directories.  (gdevpdff.h, gdevpdff.c, gdevpdft.c)

Splits off the font-writing code, since a source file was getting too big.
(gdevpdff.h, gdevpdff.c, gdevpdfw.c)

Adds CharSet information to embedded Type 1 font descriptors.  (gdevpdfw.c)

Makes all font names in the output unique, selected by static bool
MAKE_FONT_NAMES_UNIQUE.  (gdevpdff.h, gdevpdff.c, gdevpdft.c)

Reinstates support for one special case of composite fonts (8/8 mapping with
the high order byte always zero) that is used by the AdobePS4 Windows
driver.  (gdevpdft.c)

Changes the assumption about the default encoding for embedded TrueType
fonts from StandardEncoding to no known encoding.  (gdevpdft.c)

Changes FONT_EMBED_BASE14 to FONT_EMBED_STANDARD for greater
descriptiveness.  (gdevpdff.h, gdevpdff.c, gdevpdft.c)

Interpreter


Fixes problems:
	- The same-font test for Type 1 fonts didn't correctly identify
re-encoded fonts with unchanged metrics.  (zfont1.c)
	- If a save level was split into multiple internal save objects,
some changes could get undone before objects were finalized.  (isave.c)
	- When releasing all of memory, stable allocators weren't finalized.
(isave.c)
	- Some compilers gave annoying and needless warnings about integer
overflow.  (store.h)
	- There was a signed/unsigned char * mismatch.  (iccfont.c)

Adds a debugging procedure.  (idebug.h, idebug.c)

Changes the Type 1 font seac_data procedure to match the new API.
(zchar1.c)

Library


Fixes problems:
	- The GC didn't know about the pointers to the tables for Indexed
color spaces when banding, occasionally causing the tables to be written as
garbage.  This is the real fix for the problem discovered in 5.96.
(gsiparam.h, gxclist.h, gxiparam.h, gxclimag.c, gxclist.c, gxclpath.c)
	- With 'async' drivers, multi-page files didn't render properly
(they got a rangecheck error on every page after the first one).
(gdevprna.c)
	- Some compilers still complained about end-of-loop code not being
reached.  (gxpath2.c)
	- The scaled font cache required that a font have a UID in order to
be a candidate for caching.  (gsfont.c)
	- An obsolete check caused slight discrepancies between banded and
non-banded output.  (gxstroke.c)
	- The glyph_outline procedure for TrueType fonts transformed the
width by the scaling matrix twice.  (gstype42.c)

Removes some now-unnecessary extern_st declarations.  (gdevbbox.c,
gdevplnx.c, gximage3.c)

Removes some initializations that read uninitialized locations and are
logically unnecessary.  (gsalloc.c, gscolor.c)

Adds makefile rules for compiling the MD5 implementation.  (lib.mak)

Makes the seac_data of a Type 1 font return the glyph and/or the actual
outline data.  This is necessary because some Type 1 fonts don't have the
accents in the same positions as StandardEncoding, but use seac anyway.
(gxfont1.h)

Changes the Type 1 font interpreter to match the new seac_data API.
(gxtype1.c)

Version 5.96 (beta) (11/12/99)

This is the next beta for 6.0. To meet a need of our commercial licensing partner for a PostScript LL3 release, we are releasing this fileset with all font handling in the PDF writer disabled, as well as high-level image banding. This is a temporary measure: we will reinstate PDF text in 5.97, and high-level image banding as soon as we can straighten out its memory management problems.

Incompatible changes


(Procedures)
	- All Unix 'make' programs must now predefine MAKE as the name of
the program.
(Interpreter)
	- zcolor_remap_one now returns o_push_estack rather than 0 in the
case where it doesn't actually have to sample the procedure.
(Library)
	- Multi-plane halftones (when needed) are now used for all CMYK
devices, not only if setcolorscreen was executed.
	- Font implementors must now provide a same_font procedure.

Documentation


Makes it clear that gsnup.ps is very simple and naive.  (doc/Psfiles.htm,
lib/gsnup.ps)

Documents the new -Z_ switch.  (doc/Use.htm)

Documents that SYNC=nosync allows building on systems that don't support
multi-threading.  (doc/Make.htm)

Adds documentation for building on Macintosh Rhapsody systems.
(doc/Make.htm)

Adds a reference to the new all-arch.mak file.  (doc/Helpers.htm,
doc/Make.htm)

Notes that ps2pdf does preserve the color space for images.
(doc/Ps2pdf.htm)

Documents the new self-extracting archive for MS Windows.  (doc/Install.htm,
doc/Release.htm)

Further improves the documentation of the PDF text machinery.  (gdevpdfx.h)

Reorganizes the build information for Unix.  (doc/Make.htm)

Adds information on building Ghostscript under BSDI.  (doc/Make.htm)

Notes that versions of zlib before 1.1.3 may cause an error on rare
occasions.  (zlib.mak)

Fixes a few other minor problems.  (doc/Current.htm, doc/Devices.htm,
doc/DLL.htm, doc/Install.htm, doc/Language.htm, doc/Make.htm,
doc/New-user.htm, doc/Ps2pdf.htm, doc/Source.htm, doc/Use.htm)

Procedures


Fixes problems:
	- dctd.dev and dcte.dev were defined in $(PSD), but referenced in
$(GLD).  (devs.mak, int.mak, lib.mak)
	- pipe.dev was defined in $(GLD), but referenced in $(PSD).
(bcwin32.mak, dvx-gcc.mak, msvc32.mak, unix-gcc.mak, unixansi.mak,
unixtrad.mak)
	- XLIBDIRS was included in the linker command even if none of the
X drivers were used.  (devs.mak, dvx-tail.mak, ugcclib.mak, unixlink.mak)
	- The OpenVMS makefile didn't create the obj and bin directories
properly.  (openvms.mak)
	- 'make debug' and 'make pg' didn't work on Unix systems where the
make program was named something other than make.  (unix-end.mak)

Introduces a new top-level makefile macro, STDLIBS, that is -lm for all
reasonable platforms but null for Rhapsody.  (dvx-gcc.mak, dvx-tail.mak,
ugcclib.mak, unix-gcc.mak, unixansi.mak, unixlink.mak, unixtrad.mak)

Adds Nelson Beebe's contributed multi-architecture Unix makefile.
(all-arch.mak)

Makes it theoretically possible in theory to build the new Windows
install/uninstall program with the Borland compiler.  However, since this
requires Borland C++ 4.52 and we only have 4.5, this is disabled in
bcwin32.mak.  (bcwin32.mak, winint.mak)

Utilities


Fixes problems:
	- The default for gsnup.ps was 3x2 landscape, rather than 2x2
portrait.  (lib/gsnup.ps)
	- gslp.ps was broken (by the changes made to support gsnup.ps).
(lib/gslp.ps)

Adds a -link switch to genconf, to allow verbatim copying of commands into
the linker command line.  (genconf.c)

Edits files to add missing $Id lines and module summary comments, and to
delimit module summary comments from further material.  (dwinst.h,
dwsetup.h, dwuninst.h, bench.c, dwuninst.cpp)

Makes it possible to build the new Windows install/uninstall program with
the Borland compiler.  (dwinst.cpp, dwsetup.cpp, dwsetup.def, dwsetup.rc,
dwuninst.cpp, dwuninst.def)

Drivers


Fixes problems:
	- Embedded Type 1 fonts lacked some 'def' commands.  (gdevpsd1.c)
	- Multiple Master Font instances weren't written out correctly.
(gdevpsd1.c)

Edits files to add missing $Id lines and module summary comments, and to
delimit module summary comments from further material.  (gdev8bcm.h,
gdevht.h, gdevpccm.h, gdevpcl.h, gdevsvga.h, gdevx.h, gdev3852.c,
gdev8510.c, gdevadmp.c, gdevcd8.c, gdevcif.c, gdevclj.c, gdevhl7x.c,
gdevifno.c, gdevimgn.c, gdevl31s.c, gdevmeds.c, gdevmswn.c, gdevos2p.c,
gdevpe.c, gdevpm.c, gdevsj48.c, gdevtknk.c, gdevupd.c, gdevwddb.c,
gdevwpr2.c, gdevwprn.c)

Platforms


Fixes problems:
	- The pthreads wrapper had a procedure type mismatch.  We fixed this
by making it allocate and free a wrapper object, as the Windows wrapper
does.  (gp_pthr.c)

Edits files to add missing $Id lines and module summary comments, and to
delimit module summary comments from further material.  (dwimg.h, dwmain.h,
gsdll.h, gp_msio.c, gp_mswin.c)

Removes an unnecessary #include <semaphore.h>.  (gp_semon.c)

Adds a module that implements semaphores using the pthreads mutex
facilities, as an alternative to gp_posem.c.  Unfortunately, using this
module causes immediate crashes on both Linux and BSDI, and we don't know
why.  (Let us know if you figure it out.)  (gp_ptsem.c)

PDF writer


Fixes problems:
	- The character and word spacing weren't recognized as being reset
by a PDF grestore.  (gdevpdfx.h, gdevpdfu.c)
	- Fonts that couldn't be embedded were always converted to bitmaps,
rather than becoming candidates for non-embedded representation (if
EmbedAllFonts is false and the font doesn't appear on the AlwaysEmbed list).
(gdevpdfx.h, gdevpdff.c, gdevpdft.c)
	- Stream-type Cos objects were written with no (0-length) data.
(gdevpdfm.c)
	- Reencoded base 14 fonts were not recognized as such, leading to
excessive font embedding.  (gdevpdfx.h, gdevpdf.c, gdevpdff.c, gdevpdft.c)
	- Fonts were embedded by default even if EmbedAllFonts was false.
(gdevpdft.c)

Changes MaxSubsetPct to 35 to match Acrobat Distiller.  (gdevpsdf.h)

Adds some tracing output (-Z_).  (gdevpdff.c, gdevpdft.c)

Temporarily disables font handling in the PDF writer, to meet a need of our
commercial licensing partner.  All text will be converted to code-scrambled
Type 3 bitmap fonts.  (gdevpdf.c)

Interpreter (PDF)


Fixes problems:
	- The sh operator caused an invalidaccess error for shadings that
required a DataSource.  (lib/pdf_draw.ps)
	- The test for whether a Widget appearance was a Form or a
collection of sub-appearances was incorrect, causing an /undefined error in
the latter case.  (lib/pdf_draw.ps)
	- If the FontName in a Font descriptor differed from the BaseFont
name in the Font object, the interpreter used the two inconsistently,
sometimes causing the wrong font to be used.  (lib/pdf_font.ps)
	- ICCBased color spaces caused an error.  (lib/pdf_draw.ps)

Works around the fact that Acrobat Distiller produces files in which a
Widget's Form appearance lacks Type and Subtype keys.  (lib/pdf_draw.ps)

Interpreter


Fixes problems:
	- Failure in allocating the name table would cause a crash.
(iname.c)
	- Shadings with procedure-based filters didn't work.
(lib/gs_ll3.ps, ifilter.h, zfileio.c, zfproc.c)
	- Some compilers complained about arithmetic on an enum.  (iparam.c)
	- Setting a transfer or similar function to the identity function
didn't set the cached values, so the setting didn't consistently take
effect.  (icolor.h, zcolor.c)
	- If the C library's implementation of sprintf with a %g format ever
produced a number with an exponent but no decimal point, a crash would
occur.  (iutil.c)
	- The PageDeviceName page device parameter wasn't supported.
(lib/gs_lev2.ps, lib/gs_setpd.ps)
	- A public procedure wasn't declared extern if DEBUG wasn't set.
(igc.h)
	- Because of a typo, loading resources automatically from a file
always failed.  (bug introduced in 5.94) (lib/gs_res.ps)

Edits files to add missing $Id lines and module summary comments, and to
delimit module summary comments from further material.  (files.h, iastate.h,
ibnum.h, ichar.h, ifilter.h, iimage.h, iimage2.h, iparam.h, isave.h,
iscan.h, isstate.h, istream.h, iutil.h, opcheck.h, scanchar.h)

Adds a font similarity testing procedure for Type 1/2/4 fonts.  (zfont1.c)

Streams


Edits files to add missing $Id lines and module summary comments, and to
delimit module summary comments from further material.  (sbhc.h, sbtx.h,
sbwbs.h, sdct.h, scfdgen.c, scfdtab.c, shcgen.h, siscale.h, sjpeg.h,
slzwx.h, smtf.h, spdiffx.h, spngpx.h, srlx.h)

Library


Fixes problems:
	- Making a transformed font inappropriately copied the font's
notification list.  (gsfont.c)
	- Some compilers complained about end-of-loop code not being
reached.  (gxpath2.c)
	- The first two arguments of scale_delta was swapped, causing
anomalous output for certain Type 1 fonts with curves where the starting and
ending points had the same X or Y coordinate.  (gxhint3.c)
	- Large smoothness values produced blocky output.  (gxshade.c)
	- When banding, in a region where a CMYK halftone had no K at all,
the output was likely to be black rather than the correct color.  (gxcht.c)
	- Interpolated images with mirrored X scaling weren't mirrored.
(gxiscale.c)
	- Interpolated images were truncated.  (gxiscale.c)
	- Halftone caches could have a dangling pointer to a transfer map in
the halftone order.  (gxht.c)
	- The next-character code returned for kshow was the same as the
current character.  (bug probably introduced in 5.86) (gstext.c)
	- The GC didn't know about the pointers to the tables for Indexed
color spaces when banding, occasionally causing the tables to be written as
garbage.  In the process of investigating this, we discovered that the GC
didn't know about *any* of the pointers in the structures used to track
banded images.  ****** NOT FIXED, TOO MUCH RISK OF INTRODUCING FURTHER
BUGS. ****** Instead, we disabled high-level image banding in this fileset.
(gxclimag.c)

Changes the name of a variable from ppc to ppcr, because an Apple compiler
inappropriately defines the name ppc when compiling on a PowerPC.
(gxshade6.c)

Edits files to add missing $Id lines and module summary comments, and to
delimit module summary comments from further material.  (gdevbbox.h,
gscoord.h, gscpixel.h, gsfname.h, gsfont.h, gsimage.h, gslib.h, gsmdebug.h,
gspaint.h, gspath.h, gspath2.h, gxalloc.h, gxclipm.h, gxclpage.h,
gxclpath.h, gxcmap.h, gxcoord.h, gxcpath.h, gxdda.h, gxdevmem.h, gxfcache.h,
gxfont.h, gximage.h, gxiodev.h, gxpaint.h, gxpath.h, gxpcolor.h, gzacpath.h,
gzcpath.h, gzht.h, gzpath.h, md5.h, gxdither.c, md5.c)

Adds a prototype for debug_find_pointers.  (gxalloc.h)

Adds a font procedure for testing whether two fonts are the same in various
ways.  This is needed so that the PDF writer can do a reasonable job of
identifying reencoded and renamed versions of the base 14 fonts.  (gxfont.h,
gsfont.c)

Changes a macro to a procedure and improves some commenting.  (gxhint3.c)

Changes the halftoning code so that multi-plane halftones are always used on
CMYK devices, even if only a single halftone is set (setscreen or
HalftoneType 1).  (gxcht.c, gxdither.c)

Version 5.95 (beta) (11/1/99)

There were several new problems in 5.94, some of them severe. We hope this beta candidate fixes them without introducing any new ones. It also fixes some minor problems not reported in 5.93.

We think we have finally found the right workarounds for Acrobat and specification problems so that pdfwrite output (with CompatibilityLevel either 1.2 or 1.3) both conforms as closely as possible to the published PDF specification and works with Acrobat Reader (3 or 4 respectively) for both displaying and printing.

NOTE: The default level of output from the pdfwrite device (ps2pdf) has been changed back to PDF 1.2 (Acrobat 3 compatible), because this is what the majority of users want. For PDF 1.3 output, use -dCompatibilityLevel=1.3.

Note: some post-6.0 code is included under an #ifdef POST60.

Incompatible changes


(Drivers)
	- The default CompatibilityLevel in the pdfwrite device (ps2pdf) is
now 1.2 rather than 1.3.
	- pdfwrite now discards information after the last showpage rather
than producing an additional page.
(Library)
	- The is_monotonic procedure of a function now returns a result that
indicates the direction of monotonicity of each value separately.
	- The coordinate system used internally by the bbox device is now
upright (lower left corner = (0,0) rather than upper left corner).  (This
should not make any difference to clients, who should always have been using
default user space coordinate.)

Documentation


Fixes problems:
	- A couple of URLs were incorrect or out of date.  (doc/Readme.htm,
doc/Use.htm)
	- There was a typo in a comment.  (gxfont.h)
	- An old bug had been fixed, but the documentation had not been
updated to reflect this.  (doc/Current.htm)

Documents the requirement to change SYNC from posync to fbsdsync on FreeBSD.
(doc/Make.htm)

Adds references to Adobe's on-line documentation.  (doc/Readme.htm)

Updates the release procedure to mention adding .ps files.
(doc/Release.htm)

Adds documentation for the bbox device.  (doc/Use.htm)

Documents the new gsnup.ps utility.  (doc/Psfiles.htm)

Modifies the gslp utility for greater page independence and smaller output
files.  (lib/gslp.ps)

Documents the fact that the default output from pdfwrite is PDF 1.2.
(doc/Ps2pdf.htm)

Adds Inprise (as the new name of the Borland tools) in a few places.
(doc/Make.htm)

Updates the release documentation slightly.  (doc/Release.htm)

Procedures


Fixes problems:
	- FreeBSD uses a different name for the pthreads implementation.
(lib.mak, unixansi.mak, unix-gcc.mak, unixtrad.mak)

Encapsulates gsnogc.$(OBJ) in a gsnogc.dev module, to make it more sharable.
(lib.mak)

Utilities


Fixes problems:
	- guilsinglleft and guilsinglright were misspelled.
(lib/ps2ascii.ps)
	- The ps2pdf script didn't handle the -I switch correctly.  We fixed
this by including the options twice, both before and after the automatically
supplied options.  (lib/ps2pdf, lib/ps2pdf.bat)

Adds an install/uninstall program for Windows 9x, including optional
generation of a self-extracting executable, written by Ghostgum Software Pty
Ltd.  This program is not actually used yet.  (msvc32.mak, winint.mak,
dwinst.*, dwsetup.*, dwuninst.*)

Adds a new environment parameter to arch.h, ARCH_DIV_NEG_POS_TRUNCATES.
(genarch.c)

Adds a utility for N-up printing.  (unixinst.mak, lib/gsnup.ps)

Changes ps2pdf so that if showpage has ever been executed, any partial page
after the last showpage is discarded rather than made into an additional
page.  This is consistent with printers, and correctly handles BeginPage
procedures that draw backgrounds.  (gdevpdf.c)

Drivers


Fixes problems:
	- The TIFF drivers could produce incorrectly sorted tag tables.
(gdevtifs.c)
	- The OS/2 PM driver had an incorrect #include.  (gdevpm.c)
	- Embedded Type 1 fonts that used seac didn't automatically include
the constituent glyphs.  (gdevpsd1.c)
	- Embedded Type 1 fonts wrote the wrong font name in the first
(comment) line.  (gdevpsd1.c)
	- Deleting elements from the AlwaysEmbed or NeverEmbed list could
cause a memory access error.  (gdevpsdp.c)
	- The string and string array members of psdf_distiller_params were
omitted from the GC descriptor, causing memory corruption.  (gdevpsdf.h,
gdevpsdf.c, gdevpsdp.c)
	- When using "async" printing, the buffer device was destroyed too
soon.  (fix from Artifex) (gdevbmpa.c)

Adds (partial) parsing for the new Acrobat Distiller 4.0 parameters, under
#ifdef POST60.  The put_params code isn't finished.  (gdevpsdf.h,
gdevpsdp.c)

Platforms


Changes product to productfamily as the Windows registry key.  (gp_wgetv.c)

Fonts


Fixes problems:
	- guilsinglleft and guilsinglright were misspelled in
MacRomanEncoding and MacGlyphEncoding.  (lib/gs_mro_e.ps)
	- plusminus was misspelled in MacGlyphEncoding.  (lib/gs_mgl_e.ps)
	- braceleftbt was misspelled as bracelefttbt in the Symbol font.
(fonts/s050000l.pfb)  ****** NOT DISTRIBUTED YET ******
	- euro was incorrectly included at position 240 in the Symbol
encoding.  (lib/gs_sym_e.ps)
	- Zcaron and zcaron weren't included in WinAnsiEncoding (this is new
for PDF 1.3).  (lib/gs_wan_e.ps)
	- Euro replaced currency in MacRomanEncoding.  We had to change this
back, even though the Mac does use code 219 for Euro, for compatibility with
Adobe documentation.  (lib/gs_mro_e.ps)
	- TrueType fonts with more glyphencoding entries than glyphs could
cause errors.  (lib/gs_ttf.ps)

Adds the Adobe Central European encoding.  (lib/gs_ce_e.ps, unixinst.mak)

Adds more tracing to the TrueType font loader.  (lib/gs_ttf.ps)

Adds the remaining PDF Encodings to the predefined set.  (lib/gs_lgo_e.ps,
lib/gs_lgx_e.ps, lib/gs_mex_e.ps, lib/gs_mgl_e.ps, lib/gs_mro_e.ps)

PDF writer


Fixes problems:
	- When printing an error message, a pointer/length string was
incorrectly treated as a C string.  (gdevpdfm.c)
	- The treatment of text was completely broken by "improvements" made
in 5.94.  We think we've put things back to a state that at least isn't any
worse than 5.93.  (gdevpdfx.h, gdevpdff.c, gdevpdft.c)
	- The test for whether a glyph was present in a glyph set was wrong,
possibly causing an infinite loop.  (This never happened, because the code
was masked by other bugs.)  (gdevpdft.c)
	- Testing the PDF compatibility level didn't work correctly, because
of float/double mismatches.  (gdevpdfx.h, gdevpdfp.c)
	- Embedded TrueType fonts were still written in binary even if
ASCII85EncodePages was true.  (gdevpdff.c)
	- Embedded TrueType subsets didn't use Flags to indicate that they
had a non-standard cmap.  (gdevpdff.c)
	- Contrary to the obvious reading of the PDF specification, it
appears that the default encoding for embedded fonts, if no BaseEncoding is
specified, is StandardEncoding, *not* the built-in encoding of the font
itself; and that any differences from StandardEncoding must be listed
explicitly.  (gdevpdft.c)

Adds parsing for the new Acrobat Distiller 4.0 parameters, under #ifdef
POST60.  (lib/gs_pdfwr.ps, gdevpdfx.h, gdevpdfp.c)

Ensures that the Mac encodings are loaded when writing PDF.  (devs.mak)

Works around an Acrobat 3 bug: The only cmap table that works in TrueType
fonts is format 0, which can only reference glyphs up to 255.  Consequently,
a TrueType font whose Encoding references glyphs above 255 cannot be
embedded (as a font).  (gdevpdft.c)

Changes the default CompatibilityLevel from 1.3 to 1.2.  The majority of
users are running Acrobat 3.  (gdevpdf.c)

Interpreter (PDF)


Fixes problems:
	- The T* operator was changed incorrectly to use the negative of the
leading value.  (lib/pdf_ops.ps)
	- The Tz value scaled the X offset for Td and TD (which it
shouldn't), occasionally causing strings to be displaced horizontally.
(lib/pdf_ops.ps)
	- sc[n]/SC[N] didn't work with 1-value color spaces, because the
code incorrectly assumed the operand stack contained only the values on the
PDF operand stack.  (bug introduced by Annotation rendering in 5.94)
(lib/pdf_base.ps, lib/pdf_draw.ps, lib/pdf_main.ps, lib/pdf_ops.ps)
	- The HTP key in the graphics state caused an error if the
interpreter didn't implement sethalftonephase.  (lib/pdf_draw.ps)
	- If there was no Names tree, invalid links (string Dest values)
caused an error instead of being ignored.  (lib/pdf_main.ps)
	- An annotation with a Thread action caused an error.
(lib/pdf_main.ps)

Adds table entries, but not implementation, for the op and OPM keys in
ExtGState dictionaries.  (lib/pdf_draw.ps)

Works around a bug in Adobe Acrobat Distiller 4.0 for Windows: it uses the
value /Default with the BG, UCR, and TR keys in an ExtGState.
(lib/pdf_draw.ps, lib/pdf_main.ps)

Adds additional tracing for Functions.  (lib/pdf_draw.ps)

Implements the BG2, UCR2, and TR2 keys in ExtGStates.  (lib/pdf_draw.ps)

Interpreter


Fixes problems:
	- There was a (harmless) signed/unsigned mismatch.  (imainarg.c)
	- If build_gs_simple_font had to add any elements to the font
dictionary, a temporary pointer to the CharStrings could become invalid,
causing crashes or confusion.  (zbfont.c)
	- The check for known Encodings included some pseudo-Encodings.
(zbfont.c)
	- The error object wasn't reset to null before each call of the
interpreter, possibly causing the garbage collector to mark it even if it no
longer existed.  (interp.c)

Adds productfamily as a new predefined name, for the benefit of the Windows
registry.  (iinit.c)

Changes the default color smoothness to 0.02 to match Adobe RIPs.
(lib/gs_ll3.ps)

Adds using the glyph_info procedure for Type 1 fonts, needed to fix the
problem with seac and Type 1 embedded fonts.  (zfont1.c)

Library


Fixes problems:
	- Memory devices that may execute RasterOp must be initialized with
an allocator (for temporary bitmaps), but sometimes they weren't.
(gdevdrop.c)
	- The computation of colors_used for images could cause arithmetic
exceptions and/or produce incorrect results.  (fix from Artifex)
(gxclimag.c)
	- A dead variable was getting incremented in a loop.  (Small
performance bug only.)  (gsfunc0.c)
	- The cached is_monotonic value in a function head was incorrectly
declared bool rather than int.  (gsfunc.h)
	- The clip operators didn't always recognize empty clipping regions:
sometimes they retained a 1-pixel-wide region.  (gxcpath.c)
	- The bbox device could get into a recursion loop if it had a
non-null target with a non-standard fill_path procedure.  (gdevbbox.c)
	- The procedure u32 was defined in two places.  (gsutil.h,
gdevpsdt.c, gsutil.c, gstype42.c)
	- The DataSource member of a sampled function wasn't reported to the
garbage collector.  (gsfunc0.h, gsfunc0.c)  ****** MUST DO THE SAME FOR
SHADINGS ******
	- All name-type parameters (device and other) were converted as
strings rather than names.  (gsparam.c)
	- Using a mask Pattern with an anti-aliased device could make
invalid memory accesses and cause a crash.  (gxpcmap.c)
	- math_.h was included unnecessarily.  (gxfill.c, gxhint3.c)
	- In a few places, (fixed-point) coordinates were truncated towards
zero rather than taking the floor.  (It's likely that this had no effect.)
(gxfill.c, gxpcopy.c)
	- The join and cap values weren't taken into account when dividing a
stroked path into bands, possibly causing some caps or joins to be dropped
if they fell exactly at band boundaries.  (gxclpath.c)
	- An arithmetic overflow in gx_adjust_if_empty could produce
incorrect output.  (gxfill.c)
	- Because the bbox device used a Y-inverted coordinate system, it
could produce incorrect results for out-of-bounds coordinates.  (gdevbbox.c)
	- The default font_info procedure didn't compute MISSING_WIDTH if
IS_FIXED_WIDTH wasn't requested.  (gsfont.c)
	- space_params wasn't managed properly, causing problems if the
device altered the default values.  (fix from Artifex) (gdevprn.c)
	- The Macintosh cmap table for embedded TrueType fonts was written
incorrectly.  (gdevpsdt.c)
	- The OS/2 table for embedded TrueType fonts could be inconsistent
with the cmap table.  (gdevpsdt.c)
	- In embedded subset TrueType fonts, loca entries beyond the last
occupied glyph contained garbage.  (gdevpsdt.c)
	- Embedded TrueType subsets didn't include the components of
composite glyphs.  (gdevpsdf.h, gdevpsd1.c, gdevpsdf.c, gdevpsdt.c)

Changes the is_monotonic procedure of Functions so that it reports the
direction of monotonicity of each value independently.  This allows a larger
class of functions to be detected as monotonic.  (gsfunc.h, gsfunc0.c,
gsfunc3.c)

Works around a bug in Fontographer that causes it to produce (or at least
allow users to produce) Type 1 fonts using seac in which the side bearing of
the accented character differs from the side bearing of the base glyph.  The
published Type 1 specification and Adobe's engineers agree that such fonts
are invalid, but the authors of Fontographer don't seem to care (this is the
4th Fontographer bug that we have had to patch around so far).  (gxtype1.h,
gstype1.c, gxtype1.c)

Adds gs_productfamily, for the benefit of the Windows registry.  (gscdefs.h,
gscdef.c)

Adds a glyph_info procedure for Type 1 fonts, needed to fix the problem with
seac and Type 1 embedded fonts.  (gxfont1.h, gxtype1.c)

Adds a gs_resize_struct_array procedure that either allocates or resizes an
object.  We have wanted this for quite a while.  (gsmemory.h, gsmemory.c)

Adds the remaining PDF Encodings to the predefined set.  Also adds string
names for the "real" encodings.  (gsccode.h)

Adjusts the format of embedded TrueType fonts to be closer to that produced
by Acrobat Distiller, in the hope of making Acrobat Reader accept them.
(gdevpsdf.h, gdevpsdt.c)

Version 5.94 (beta) (9/30/99)

This is (intended to be) the last beta candidate for the 6.0 release. Most changes other than added documentation are bug fixes. In order to address a last-minute problem report, we implemented a subset of Annotation rendering for PDF files.

At the request of the Free Software Foundation, we removed support for GNU readline from the Aladdin Ghostscript fileset. See here for more information.

We suspect that Acrobat's bugs and limitations still prevent embedded TrueType fonts in files created by the pdfwrite device from working properly, but we have neither the time nor the means to test this properly.

Incompatible changes


(Procedures)
	- For OpenVMS with MMK or MMS, the third-party libraries are now
located in [.<lib>] rather than [-.<lib>].
	- The OpenVMS makefiles now select the same set of devices as the
Unix makefiles.
	- The MS Windows and MS-DOS default installation directory is now
c:\Aladdin\gs#.# rather than c:\gs.
	- All top-level makefiles now need a definition of BUILD_TIME_GS.
(Drivers)
	- The cljet5 driver is renamed cljet5pr; there is a new cljet5
driver that doesn't attempt (and fail) to handle page rotation.
(Interpreter)
	- .getiodevice may return null.
(Library)
	- IODevices may now have a null name.

Documentation


Fixes problems:
	- The documentation of font searching was still wrong in both
places.  (doc/Fonts.htm, doc/Use.htm)

Notes that certain CodeWarrior code generation options produce incorrect
code.  (doc/Make.htm)

Removes an inaccurate and obsolete comment.  (lib/pdf_font.ps)

Notes that newer versions of the SGI compiler use a different switch for
setting the optimization limit.  (doc/Make.htm)

Notes that there may be code generation bugs in MSVC5 and later.
(doc/Make.htm)

Documents the new Fontmap.SGI file.  (doc/Use.htm)

Updates the documentation on installing Ghostscript on MS Windows.
(doc/Install.htm)

Documents the removal of the GNU readline interface.  (doc/Current.htm,
doc/Make.htm)

Procedures


Fixes problems:
	- The instcopy script, supposed to handle incompatibilities between
Unix `install' commands, didn't work.  (instcopy, unixinst.mak)
	- The Windows makefiles had an extra occurrence of `.' at the
beginning of the default search path.  (bcwin32.mak, msvc32.mak,
msvclib.mak, watc*.mak)
	- The OpenVMS makefile didn't automatically create the bin and obj
directories if needed.  (openvms.mak)

Changes the OpenVMS MMK/MMS makefile to expect the third-party libraries in
a subdirectory of the current directory, rather than a subdirectory of the
parent.  This makes it compatible with all the other makefiles.
(openvms.mmk)

Changes the OpenVMS makefiles to select the same set of devices as the Unix
makefiles.  (openvms.mak, openvms.mmk, unixansi.mak)

Changes the Windows and OS/2 default search paths to match the new
convention of installation rooted at c:\Aladdin.  (bcwin32.mak, msvc32.mak,
msvclib.mak, os2.mak, watc.mak, watclib.mak, watcw32.mak)

Utilities


Fixes problems:
	- The Type 1/2 CharString printer didn't handle undefined opcodes
correctly.  (lib/type1ops.ps)
	- There was no Unix script for pf2afm.  (lib/pf2afm)
	- The Type 1/2 font printing utilities didn't default lenIV to -1
for Type 2, and didn't handle lenIV = -1 correctly in some places.
(lib/type1ops.ps)
	- The font2c utility used the version of font2c.ps from whatever
existing Ghostscript executable was in the search path.  Fixing this
required adding a new parameter in all top-level makefiles, BUILD_TIME_GS.
(cfonts.mak, bcwin32.mak, dvx-gcc.mak, msvc32.mak, openvms.mak, openvms.mmk,
os2.mak, unix-gcc.mak, unixansi.mak, unixtrad.mak, watc.mak, watcw32.mak)
	- The pfbtopfa usage message was incorrect.  (lib/pfbtopfa.ps)

Drivers


Fixes problems:
	- The pswrite driver didn't reset the clipping path when writing
low-level images, possibly causing output to be clipped incorrectly.
(gdevps.c)
	- The PNG drivers implicitly declared png_init_io.  Fixing this is
only possible in libpng versions 1.0.3 and later.  (gdevpng.c)
	- The cljet5 driver (now cljet5pr) set rotated = true if the page
was rotated, but didn't set it to false if the page wasn't rotated.
(gdevclj.c)
	- Embedded Type 1 fonts didn't include any FontInfo elements.
(gdevpsd1.c)
	- Specifying the DCTEncode filter for compressing images caused a
crash.  This problem is hard to fix correctly because of the complicated
initialization requirements of the JPEG encoder.  We patched around it by
substituting FlateEncode (when available) for DCTEncode.  (gdevpsdi.c)

Renames the cljet5 driver, which has special (and incorrect) hacks to handle
page rotation for the PCL interpreter, as cljet5pr; adds a new cljet5 driver
without the hacks.  (gdevclj.c)

Platforms


Fixes problems:
	- On MS Windows and OS/2 systems, the wstdio pseudo-IODevice showed
up as an instance of the IODevice resource category, causing problems.
(gp_msio.c, gp_os2.c)

Adds a set of XBM/XPM icons in 4 sizes, contributed by Gintautas Grigelionis
(eragigr@ki.ericsson.se).  (lib/gs*.xbm, lib/gs*.xpm, unixinst.mak)

Brings the Windows and OS/2 code up to date, fixing some minor problems.
(gdevpm.c, gp_os2.c, gsos2.rc, gspmdrv.rc, os2.mak, pcwin.mak)

Fonts


Fixes problems:
	- The font directory scanner (FONTPATH) didn't recognize TrueType
fonts tagged as 'true' rather than 0x00010000.  (lib/gs_ttf.ps)

Changes the TrueType font loader to use ISOLatin1Encoding for constructing
the CharStrings if there is a Microsoft Unicode cmap and no glyph names in
the post table.  This seems like a hack, but we aren't sure what the right
approach would be.  (lib/gs_ttf.ps)

Adds a Fontmap for SGI IRIX.  This just comments out those fonts that are
provided by DPS.  (lib/Fontmap.SGI)

PDF writer


Fixes problems:
	- Writing Patterns could cause a memory access error.  (bug
introduced recently) (gdevpdfi.c)
	- Filling with a pattern didn't reset the clipping path, possibly
causing output to be clipped incorrectly.  (gdevpdfi.c)
	- Patterns weren't scaled correctly.  (gdevpdfi.c)
	- The data for large Patterns could exceed Acrobat Reader's limit on
the length of a string.  (gdevpdfi.c)
	- copy_color did an extra gsave and concat.  (gdevpdfi.c)
	- Repeated color images weren't detected (performance bug only).
(gdevpdfi.c)
	- Names including control characters or spaces produced invalid
output.  (gdevpdfx.h, gdevpdfu.c)
	- A matrix multiply was in the wrong order, causing fonts with
non-zero translation in the FontMatrix to render at incorrect coordinates
(sometimes off the page).
	- If a font had one of the 14 standard names but had some characters
defined by PostScript procedures, the output file would be invalid.
(gdevpdft.c)
	- The graphics state line parameters were kept in two different
copies, causing bookkeeping errors.  (gdevpdfx.h, gdevpdf.c, gdevpdfd.c,
gdevpdfu.c)
	- If a page's BeginPage procedure did anything other than erase the
page to white, the resulting PDF file was invalid.  (gdevpdf.c)
	- Articles with the same title weren't merged properly.
(gdevpdfm.c)
	- The Threads element of the catalog wasn't an indirect object.
(gdevpdf.c)
	- Thread actions incorrectly converted the destination (thread
title) to a name, rather than leaving it as a string.  (gdevpdfm.c)
	- Fonts with the same name as the built-in ones, but not the
standard definitions, produced possibly incorrect output.  (gdevpdff.c)
	- The writer didn't recognize attempts to use Encodings with the
standard fonts that mentioned characters not present in the font's glyph
set.  (gdevpdft.c)

Ensures that the WinAnsiEncoding is loaded when writing PDF.  (devs.mak)

Interpreter (PDF)


Fixes problems:
	- The default (identity) CMap didn't map CID 0 to glyph 0.
(pdf_fonts.ps)
	- TrueType fonts with an explicit Encoding didn't work properly.
(lib/gs_ttf.ps)
	- If an embedded Type 1 font executed definefont more than once,
the wrong thing would happen.  (lib/pdf_font.ps)
	- The T* operator used the negative of the leading value.
(lib/pdf_ops.ps)

Implements a subset of Annotation rendering: only Widget annotations, only
Normal appearance, only S and D borders, no rounded-corner borders.  We did
this at the very last minute before the release, in order to respond to a
bug report, and it probably has some bugs.  (lib/pdf_draw.ps,
lib/pdf_main.ps)

Interpreter


Fixes problems:
	- If an input buffer boundary fell at exactly the wrong place, an
image whose input was coming from a stream could fail to read the stream EOD
marker.  (This is quite an old bug.)  (zimage.c)
	- On MS Windows and OS/2 systems, the wstdio pseudo-IODevice showed
up as an instance of the IODevice resource category, causing problems.
(lib/gs_res.ps, ziodev.c)
	- errorinfo in $error was undefined, rather than null, initially and
after errors that didn't set it deliberately.  (lib/gs_init.ps)
	- The InkParams resource category was defined even in systems that
didn't support in-RIP trapping.  (lib/gs_ll3.ps, lib/gs_res.ps,
lib/gs_trap.ps)
	- CID fonts with 0-length data caused an error.  (lib/gs_cidfn.ps)
	- Type 10 halftone dictionaries were broken -- perhaps they never
had worked.  (lib/gs_ll3.ps)

Makes FontInfo entries available through the extended font API, needed to
allow embedded Type 1 fonts to include those entries.  (zfont1.c)

Makes it possible to determine whether the current file is a resource file,
needed to allow distinguishing between built-in and input-embedded fonts.
(lib/gs_ccfnt.ps, lib/gs_fonts.ps, lib/gs_init.ps, lib/gs_res.ps,
lib/gs_type1.ps, zfont.c)

Moves support for GNU readline from the main Ghostscript fileset to the
GNU-specific fileset.  (unix-gcc.mak, int.mak, gp_gnrdl.c =>
src/gnu/gp_gnrdl.c, gnu/src/gnudevs.mak)

Streams


Fixes problems:
	- The CCITTFaxDecode filter didn't correctly handle the case where
the last code of a 1-D row was a black code and occurred less than 7 or 8
bits before the end of the input stream.  (We thought we fixed this in 5.86,
but we missed one case.)  (scfd.c)
	- If an input buffer boundary fell at exactly the wrong place, an
image whose input was coming from a stream could fail to read the stream EOD
marker.  (This is quite an old bug.)  Fixing this involved a possibly risky
change to the definition of sbuf_min_left and the already fragile logic in
sreadbuf: the fix does solve this problem, but we aren't at all certain it
didn't introduce new ones.  (stream.h, stream.c)

Library


Fixes problems:
	- The default implementation of copy_tile didn't pass the bitmap id
for complete tiles, missing potential optimizations (performance bug only).
(gdevdbit.c)
	- The patch edges of ShadingType 7 shadings were ordered
incorrectly, producing incorrect output in some cases where the surface
folds over itself.  (gxshade6.c)
	- Flushing internal buffers when rendering an image didn't clip the
flushed data, producing incorrect output.  (gxidata.c)
	- Non-zero data_x values for banded images produced incorrect band
list data.  (It's astounding that this problem hasn't shown up before.)
(gxclimag.c)
	- Banded images rotated by 90 degrees could produce "seams" or
garbage if they crossed band boundaries.  (This is at least the third time
we have "fixed" this problem.)  (gxclimag.c, gxifast.c)
	- Circles or ellipses defined by pairs of 180-degree arcs produced
incorrect output when banding.  (gxclpath.c, gxclrast.c)
	- setgray et al simply cleared the Pattern pointer in the client
color rather than adjusting its reference count.  (gscolor.c, gscolor1.c)
	- The saved graphics state for bitmap/pixmap patterns contained a
reference to the Pattern color, causing Patterns to be retained when they
shouldn't be and causing unwanted recursion when freeing them.  (gsptype1.c)
	- Patterns containing halftoned CMYK colors rendered as all black.
(bug probably introduced in 5.6x) (gxcht.c)
	- Because of a typo, CMYK halftoning with only a single plane could
put too much yellow into the output.  This appears to be quite an old bug.
(gxdither.c)
	- The error code from running out of band list memory wasn't
propagated if the condition was detected in cmd_put_drawing_color, causing
low-memory recovery not to be invoked.  (gxclpath.c)
	- (Same error code problem) in clist_change_tile.  (gxclbits.c)

Adds more font attributes to the set available through a standard API.
(gxfont.h)

Adds more statistics to the filling algorithm.  (gxfill.c)

Adds an is_resource flag to fonts, to indicate that they originated from a
resource rather than being embedded in an input file.  (gxfont.h, gsfont.c)

Version 5.93 (beta) (9/11/99)

This is the next candidate for the 6.0 release. As with 5.92, all changes other than added documentation are bug fixes.

Incompatible changes


(Library)
	- Every stream whose state includes any GC-traceable pointers must
now have a set_defaults procedure that clears those pointers.

Documentation


Fixes problems:
	- There was an extra /ul tag.  (doc/Release.htm)
	- Fontmap.GS wasn't mentioned as needing to be installed.
(doc/Install.htm)
	- Some documentation for the handling of seac was incorrect.
(gxtype1.c)

Removes references to installbsd, which are no longer relevant.
(doc/Install.htm)

Updates the information on building with NeXTSTEP.  (doc/Make.htm)

Procedures


Fixes problems:
	- The install command had unpredictably different syntax from one
"standard" Unix system to another, causing `make install' to fail.  We
replaced the install command with our own script.  (instcopy, dvx-gcc.mak,
unix-gcc.mak, unixansi.mak, unixtrad.mak)

Utilities


Fixes problems:
	- pcharstr.ps loaded type1ops.ps with run rather than runlibfile,
causing an error.  (lib/pcharstr.ps)

Drivers


Fixes problems:
	- Attempting to embed a font whose Encoding included characters not
present in the font produced invalid output.  (gdevpsd1.c)
	- Allocating a stream state didn't (automatically) clear all its
internal pointers, possibly causing GC memory access errors.  (gdevpsds.c)
	- An #include of string_.h should have been memory_.h.  (gdevpsdf.c)

Disables compression for very small images.  (gdevpsdi.c)

Platforms


Fixes problems:
	- Compiling gp_msio with MSVC's /MD switch caused a compile-time
error.  (gp_msio.c)

PDF writer


Fixes problems:
	- A bookkeeping object was allocated with the wrong allocator,
possibly causing access errors or garbage output.  (gdevpdfu.c)
	- Certain Patterns weren't treated as such, leading to very large
output files.  (gdevpdfi.c)
	- If one of the base 14 fonts had a non-standard FontMatrix, the
output disregarded this fact.  This could cause double obliquing.
(gdevpdfx.h, gdevpdff.c, gdevpdft.c)
	- Articles never got an object ID assigned.  (bug introduced in
5.91) (gdevpdfm.c)

Interpreter (PDF)


Changes the PDF interpreter to allow abbreviated filter names like /Fl for
all streams, not just in-line images.  This directly contradicts the
published PDF specification, but Acrobat Reader allows it.
(lib/pdf_base.ps)

Interpreter


Fixes problems:
	- Compiled fonts were broken by the introduction of i_ctx_p.
(lib/font2c.ps, ccfont.h, iccfont.c)
	- Allocating a stream state didn't (automatically) clear all its
internal pointers, possibly causing GC memory access errors.  (zfproc.c)

Streams


Fixes problems:
	- Allocating a stream state didn't (automatically) clear all its
internal pointers, possibly causing GC memory access errors.  (scfx.h,
slzwx.h, spngpx.h, strimpl.h, sbwbs.c, sdctc.c, seexec.c, sfilter1.c,
siscale.c, szlibc.c)
	- The PNG predictor streams could fail to process some data at the
end of the input.  (spngp.c)

Library


Fixes problems:
	- Some obsolete definitions for Turbo C could produce references to
an undefined procedure (setmem) at link time.  (memory_.h, string_.h)

Version 5.92 (beta) (9/2/99)

This is the next candidate for the 6.0 release. All changes other than added documentation are bug fixes.

Documentation


Fixes problems:
	- The News for 5.91 didn't include a summary.  (doc/News.htm)
	- The documentation for Microsoft platforms didn't mention that you
must add the Ghostscript bin and lib directories to the PATH.  (doc/Use.htm)

Adds a file describing Aladdin's process for building, testing, and
releasing Ghostscript.  (doc/Readme.htm, doc/Release.htm)

Procedures


Fixes problems:
	- Fontmap.GS is now required, but wasn't installed.  (unixinst.mak)
	- A couple of documentation files weren't installed.  (unixinst.mak)

Utilities


Fixes problems:
	- The ps2pdf script for MS Windows used the wrong name for the
executable.  (lib/ps2pdf.bat)

Drivers


Fixes problems:
	- An uninitialized variable annoyed some compilers.  (gdevpsdt.c)
	- The PostScript-writing driver used the wrong allocator, causing
possible memory access errors.  (gdevps.c)
	- The PostScript-writing driver didn't clear a pointer, causing
possible GC errors.  (gdevps.c)
	- The PostScript-writing driver didn't have a correct GC descriptor,
causing pointers to be corrupted.  (gdevpsdf.h, gdevps.c, gdevpsdf.c)
	- Embedded Type 1 fonts unnecessarily filled individual Encoding
slots with /.notdef.  (gdevpsd1.c)
	- A large constant produced warnings on some compilers.  (gdevpsdt.c)

PDF writer


Fixes problems:
	- Once again, gcc didn't complain about an ANSI-illegal extra
semicolon in a declaration list.  (gdevpdfo.h)
	- Adds a cast to work around the fact that some compilers declare
the return type of memchr as char * rather than void *.  (gdevpdfr.c)
	- The bookkeeping for whether a font had been written and freed was
inverted, causing some fonts to be written many times and other fonts not to
be written at all.  (gdevpdf.c)

Interpreter


Fixes problems:
	- More places needed workarounds for the alignment aliasing gcc bug.
The bug only occurs if a pointer variable is dereferenced through a cast to
a stricter alignment and then dereferenced later in its original form, so it
doesn't affect very many places.  (igc.c, igcref.c, isave.c)

Streams


Makes the stream GC descriptor public for subclassing.  (stream.h, stream.c)

Version 5.91 (beta) (8/30/99)

This is the next beta for 6.0. It includes a major rewrite of the parts of the PDF writer that deal with resources and pdfmarks, as well as the usual bug fixes. There are still problems with embedded fonts, both TrueType (which sometimes don't show up at all) and Type 1 (which sometimes confuse Acrobat Reader 3).

Documentation


Fixes problems:
	- An HTML tag was misplaced in the News file.  (doc/News.htm)

Notes that the Solaris FONTPATH scanning problem may be fixed.
(doc/Use.htm)

Utilities


Fixes problems:
	- Many of the margin and width computations in ps2epsi.ps (not
written by Aladdin) were wrong -- off by 1.  It's only because the bugs
masked each other or cancelled each other out that the code didn't produce
errors more of the time.  (lib/ps2epsi.ps)

Drivers


Fixes problems:
	- Font subset glyphs weren't sorted early enough, causing Type 1
embedded fonts to be written with inconsistent lengths.  (gdevpsd1.c)

Changes the BMP drivers so that they set the resolution in the BMP header
rather than leaving it at 0.  This solves some problems reported by users,
but may cause others.  (gdevbmpc.c)

Platforms


Fixes problems:
	- A change made in 5.90 was incorrect (we couldn't test it, because
MS Windows and OS/2 systems can't be used over a network).  (gp_msio.c,
gp_os2.c)

Adds some conditionalization to work around a bug in some recent versions of
gcc/egcs.  (stdpre.h, interp.c)

Fonts


Fixes problems:
	- If the extension of a font file name on GS_FONTPATH included any
upper-case characters, the font would not be found.  (lib/gs_fonts.ps)

Allows fontmaps to contain <string> run or .runlibfile, to get rid of the
Fontmap -> Fontmap.GS link that VMS can't handle.  (lib/gs_fonts.ps)

PDF writer


Fixes problems:
	- Very long arguments for pdfmark caused an ioerror, because the
buffer used for converting them was fixed-length.  (lib/gs_pdfwr.ps)
	- pdfmarks couldn't refer to objects that hadn't been defined yet.
(gdevpdfx.h, gdevpdfo.c)
	- When a DOCVIEW pdfmark added an OpenAction key to the Catalog,
it omitted the / before the name.  (gdevpdfm.c)
	- Font resources could be written in the middle of a page contents
stream.  (bug introduced in 5.90) (gdevpdff.c, gdevpdfu.c)
	- As usual, there were some signed/unsigned char * mismatches that
gcc didn't detect.  (gdevpdff.c, gdevpdfm.c, gdevpdfo.c)
	- Fonts used on a page but freed before the end of the page were
omitted from the page's resource dictionary.  (gdevpdfx.h, gdevpdf.c,
gdevpdff.c, gdevpdft.c)
	- /D or /Dest keys in Action pdfmark dictionaries dropped the first
character of their value.  (gdevpdfm.c)
	- If a pdfmark added annotations to a page after the end of that
page had been reached, those annotations would be lost.  (gdevpdf.c)
	- ANN, LNK, DEST, and PS pdfmarks ignored the object name, if any.
(Only OBJ and BP processed the name.) Unfortunately, fixing this required a
complete overhaul of the way that resources and PDF objects were represented
internally.  The result is both simpler and more general, but it involved a
major upheaval in the PDF writer code.  (lib/gs_pdfwr.ps, gdevpdfo.h,
gdevpdfx.h, gdevpdf.c, gdevpdff.c, gdevpdfi.c, gdevpdfm.c, gdevpdfo.c,
gdevpdfr.c, gdevpdft.c, gdevpdfu.c)
	- EP pdfmarks didn't close any open text context.  (gdevpdfm.c)

Adds debugging code to check the consistency of the embedded Type 1 font
writer.  (gdevpdff.c)

Makes /A and /F at the top level of an annotation or outline pdfmark
equivalent to /Action and /File respectively.  See the code for more
information.  (gdevpdfm.c)

Library


Fixes problems:
	- Degenerate Bezier curves could cause a division by zero.
(gxpcopy.c)
	- Some macros used in non-FPU configurations were missing some
needed uses of const, and in one case an additional cast.  (gxfarith.h,
gxfixed.h)

Changes the discard macro to upper-case.  (stdpre.h)

Version 5.90 (beta) (8/20/99)

This is the first real candidate for the 6.0 release. It does not fix all known bugs, but it includes all planned functionality. New in this fileset:

Incompatible changes


(Interpreter)
	- ref_stack_init now takes an additional argument.
	- no_time_slice_proc is removed -- use 0 instead.
(Library)
	- Notification client procedures and the gs_notify_ procedures
take different arguments.
	- The common part of a gs_function_t structure has changed.
	- gs_text_enum_init now returns a value that can indicate an error.
	- The font font_info procedure now takes an additional argument.
	- The IODevice open_device procedure is now defined as returning
0 or 1 under specific circumstances.
	- gxp1fill.h is renamed gxp1impl.h.
	- Allocators now have an additional procedure they must implement,
and a state member they must initialize.
	- Most of the gs..basic.. structure definition macros have been
renamed.  The ptrs1_stringsN structure definition macros are removed.
	- Implementations of the text API now must provide a resync
procedure rather than a restart procedure.

Documentation


Documents the new -dUsePrinterImages switch, and the expanded meaning of
-Z~.  (doc/Use.htm)

Updates FSF's address in documentation.  (lib/Fontmap.GS, lib/Fontmap.Sol,
gdevcd8.c)

Brings the PDF writer (ps2pdf) documentation up to date.  (doc/Ps2pdf.htm)

Updates the current-release documentation.  (doc/Current.htm,
doc/Readme.htm)

Updates the problem-reporting procedure for contributed drivers, and some
other new-user information.  (doc/New-user.htm)

Procedures


Fixes bugs:
	- Because of a typo, the file gs_mgl_e.ps wasn't installed (on Unix
systems) by 'make install'.  (unixinst.mak)
	- The .dev files for drivers didn't depend on devs.mak.  (devs.mak)
	- The X driver didn't include a needed dependency on the bbox
device.  (devs.mak)

Incorporates the pdfmin package into the pdf package, since pdfmin was only
provided for very small-memory environments and is no longer useful.
(int.mak)

Adds additional prototype-checking switches, which are important on 64-bit
platforms and useful on all platforms, to the gcc compilation line.
(unix-gcc.mak)

Utilities


Fixes bugs:
	- A backquote was misplaced in the Unix ps2pdf script.  (lib/ps2pdf)
	- Some example files didn't have %! headers.  (examples/alphabet.ps,
examples/waterfal.ps)
	- ansi2knr didn't handle preprocessor directives within a function
header.  (ansi2knr.c)

Cleans up some minor compiler complaints.  (genarch.c, genconf.c, echogs.c)

Drivers


Fixes bugs:
	- The PostScript writer sometimes failed to reset the clip path,
causing parts of the output to be omitted or to appear incorrectly.
(gdevvec.c)
	- There was a type mismatch in a conditional.  (gdevxini.c)
	- A constant array wasn't declared as static.  (gdevpsdt.c)
	- Once again, there were some signed / unsigned char mismatches that
gcc apparently can't be forced to detect.  (gdevpsdt.c)
	- The alternative X drivers didn't have GC descriptors, which could
lead to memory corruption.  (gdevxalt.c)
	- The alternative X drivers didn't handle the closing of the
underlying X driver correctly, leading to a dangling pointer.  (gdevxalt.c)
	- Font subsetting didn't eliminate duplicate glyphs (glyphs
referenced more than once from the Encoding vector.)  (gdevpsd1.c,
gdevpsdt.c)
	- Type 1 font subsetting didn't ensure the presence of .notdef.
(gdevpsd1.c)
	- The embedded TrueType font writer wrote all 16-bit values
incorrectly.  This could explain a lot!  (gdevpsdt.c)

Cleans up public functions with no previous prototype.  (gdevtfax.h,
gdevx.h, gdevdfax.c, gdevtfax.c, gdevx.c, gdevxini.c, gdevxxf.c)

Adds some procedures to support font subsetting.  (gdevpsdf.h, gdevpsdf.c)

Adds an alternate font name for writing TrueType fonts.  (gdevpsdt.c)

Makes the TrueType font writer generate an OS/2 table, a Macintosh cmap, and
a name table (for the font name), as well as a Windows cmap and post, if
necessary.  (gdevpsdf.h, gdevpsdt.c)

Platforms


Updates a couple of clients for the change in the IODevice open_device
procedure, eliminating some undesirable externs.  (gp_msio.c, gp_os2.c)

Fonts


Adds OS/2 and maxp to the list of tables that must be preserved when loading
TrueType fonts.  (lib/gs_ttf.ps)

Registers the complete lists of glyphs in the Adobe Latin fonts as
pseudo-encodings.  (lib/gs_lgo_e.ps, lib/gs_lgx_e.ps, unixinst.mak)

PDF writer


Fixes bugs:
	- One built-in font was sometimes substituted for another.
(gdevpdff.c)
	- Use of composite fonts often produced a rangecheck error.
(gdevpdft.c)
	- The structures for named objects were freed twice.  (gdevpdfx.h,
gdevpdf.c, gdevpdfo.c)
	- The code to avoid writing a blank between a Td command and
following text was fragile and still incorrect after being "fixed" twice.
We removed this minor optimization, at a small cost in file size when not
compressing.  (gdevpdft.c)
	- No Names tree was generated for named destinations specified as
strings.  Rather than do this, we now convert string destinations to names.
This doesn't scale up well, but it is simple and also is compatible with all
PDF versions from 1.1 on.  (gdevpdfm.c)
	- Fonts that define characters incrementally, such as the TrueType
fonts written by some versions of the AdobePS Windows driver, could omit
characters if embedded.  Fixing this required delaying writing out fonts
until the font was about to be freed or the writer was closed.  (gdevpdfx.h,
gdevpdff.c, gdevpdft.c)

Cleans up public functions with no previous prototype.  (gdevpdfx.h,
gdevpdf.c, gdevpdfm.c)

Updates client code for the change in gs_text_enum_init.  (gdevpdft.c)

Makes some changes towards handling show operations that must be split up
internally into multiple operations using different fonts.  (gdevpdfx.h,
gdevpdff.c, gdevpdft.c)

Implements the PUT pdfmark for the built-in objects (Catalog, DocInfo,
Page<#>, ThisPage, PrevPage, NextPage).  This required deferring writing out
page objects until the end of the document.  (lib/gs_pdfwr.ps, gdevpdfx.h,
gdevpdf.c, gdevpdff.c, gdevpdfm.c, gdevpdfo.c, gdevpdfu.c)

Adds table entries, but not parsing, checking, or functionality, for the new
Acrobat 4 pdfmarks related to document logical structure.  (gdevpdfm.c)

Implements stream-type Cos objects.  (lib/gs_pdfwr.ps, gdevpdfx.h,
gdevpdf.c, gdevpdfm.c, gdevpdfo.c, gdevpdfp.c, gdevpdfu.c)

Implements BP/EP/SP pdfmarks.  (gdevpdfx.h, gdevpdf.c, gdevpdfi.c,
gdevpdfm.c)

Changes enumeration and #defined names to upper case, and adds _t to type
names.  (gdevpdfx.h, gdevpdf*.c)

Adds an OS/2 table for embedded fonts if missing.  (gdevpdff.c)

Makes the allocator for the PDF device's internal structures be the stable
allocator of the device's allocator, not the C heap.  This required
correcting a number of GC descriptors.  (gdevpdfx.h, gdevpdf.c, gdevpdfu.c)

Replaces the text restart procedure with the new resync procedure.
(gdevpdft.c)

Interpreter (PDF)


Fixes problems:
	- Failure to find a font in the Resources dictionary signalled an
/undefinedfont error (which does not exist) rather than /invalidfont.
(lib/pdf_font.ps)

Implements FunctionType 4 functions.  (lib/pdf_draw.ps, zfunc4.c)

Implements the -dUsePrinterImages switch to use "alternate" printer images
when rendering.  (lib/pdf_draw.ps)

Interpreter


Fixes problems:
	- Some pointers were declared as ref * that actually could be
ref_packed *, potentially confusing compilers that follow the new, stricter
ANSI C rules about alignment aliasing.  (idebug.h, idebug.c, igc.c,
igcref.c, zmisc.c)
	- cshow didn't restore the root font after executing the procedure,
producing incorrect results if the procedure did a setfont.  (ichar.h,
zcfont.c, zchar.c)
	- A needed const-breaking cast was omitted.  (zmisc.c)
	- The memory validator could cause an unaligned access.  (ilocate.c)
	- restore could free parts of the stacks that were still in use.  We
fixed this long-standing problem using the new concept of stable allocators.
(interp.c)

Moves the implementation of the abs operator to C, required for FunctionType
4 support.  (lib/gs_init.ps, zarith.c)

Makes more operator procedures public, required for FunctionType 4 support.
(zarith.c, zmath.c, zrelbit.c, ztype.c)

Adds an additional parameter to ref_stack_init, to allow creating a
temporary stack without having an allocator.  (istkparm.h, istack.h,
interp.c, istack.c)

Cleans up public functions with no previous prototype.  (files.h, ichar.h,
icstate.h, ifilter2.h, ifrpred.h, ifwpred.h, igcstr.h, iimage.h, iimage2.h,
iinit.h, imain.h, interp.h, iscanbin.h, ivmem2.h, oparc.h, opextern.h,
icontext.c, igc.c, iinit.c, imain.c, inobtokn.c, interp.c, iscan.c,
iscanbin.c, zchar.c, zcharout.c, zcolor.c, zcolor1.c, zcontrol.c, zdevice.c,
zdpnext.c, zdps.c, zfdecode.c, zfile.c, zfilter2.c, zfont0.c, zfunc0.c,
zfunc3.c, zfzlib.c, zgeneric.c, zht1.c, zht2.c, zimage.c, zimage2.c,
ziodev.c, zmath.c, zpath1.c, zupath.c, zusparam.c, zvmem.c, zvmem2.c)

Updates client code for the tweak in the definition of the IODevice
open_device procedure.  (ziodev.c)

Implements stable local and global VM allocators.  This required changing
more places than we would have liked.  (ialloc.c, igc.c, ilocate.c, imain.c,
interp.c, ireclaim.c, isave.c, zcontext.c)

Removes the global member of gs_ref_memory_t, since it isn't used.
(gxalloc.h, ialloc.c, zcontext.c)

Adds more tracing to the relocation phase of the garbage collector.
(igcref.c)

Streams


Fixes problems:
	 - jpeg_open_backing_store no longer had the correct arguments.
(This had no effect in practice, since the procedure was never called.)
(sjpegc.c)

Cleans up public functions with no previous prototype.  (scfdgen.c,
scfetab.c, sjpegc.c, slzwce.c, slzwd.c, stream.c)

Adds some tracing to the image scaling stream.  (siscale.c)

Library


Fixes bugs:
	- A null OutputFile name could cause an error.  (gxdevice.h,
gsdevice.c, gsfname.c)
	- Shading with non-monotonic Functions produced incorrect output.
(gxshade1.c)
	- An #undef didn't match the #define it was supposed to cancel.
(gxchar.c)
	- The default next_char_glyph procedure didn't handle FROM_CHARS or
FROM_SINGLE_CHAR data sources.  (gstext.c)
	- When finalizing a forwarding device, the target pointer in the
device wasn't cleared, leading to an incorrect attempt to access it later.
(gdevnfwd.c)
	- Interpolated images were broken, probably since 5.81.
(gxiscale.c)
	- Some color space implementation procedures hadn't been updated to
add 'const' to the color space argument.  (gscie.c)
	- A constant had a signed/unsigned ambiguity on systems where
sizeof(long) > 4.  (gsccode.h)
	- The font font_info procedure didn't provide for scaling.
(gxfont.h)

Simplifies the notification mechanism to remove the concept of client and
generating object.  Registration now just takes a closure (procedure +
opaque data); events pass the closure data and event data.  (gsnotify.h,
gsfont.c, gsnotify.c)

Changes gs_notify_unregister so that it can unregister all registrations of
a particular client rather than only one.  (gsnotify.h, gsnotify.c)

Adds support for "vanilla" Functions at the library level.  (gsfunc.h,
gsfunc.c)

Adds some tracing for Functions.  (gsfunc3.c)

Redefines function monotonicity to indicate whether the function is
increasing or decreasing, and implements monotonicity correctly for all
FunctionTypes except 4.  (gsfunc.h, gxfunc.h, gsfunc0.c, gsfunc3.c)

Makes Type 0 fonts check that they are being used with a string, not a
character or (a) glyph(s).  (gxtext.h, gschar.c, gschar0.c, gstext.c,
gxchar.c)

Cleans up public functions with no previous prototype.  (gdevmem.h,
gpcheck.h, gscie.h, gserror.h, gsmemory.h, gxcie.h, gxcldev.h, gxclpath.h,
gxcmap.h, gxcspace.h, gxfixed.h, gxfont0.h, gxp1fill.h [deleted],
gxp1impl.h, math_.h, std.h, gconf.c, gdevdrop.c, gdevm1.c, gdevm2.c,
gdevm4.c, gdevm8.c, gdevm24.c, gdevmr1.c, gdevmr2n.c, gdevprn.c, gsbittab.c,
gscdef.c, gscie.c, gsciemap.c, gscspace.c, gscscie.c, gsdevmem.c,
gsdparam.c, gshtscr.c, gsimpath.c, gsiodev.c, gsmisc.c, gsnorop.c, gspath.c,
gspcolor.c, gsptype1.c, gsropc.c, gsutil.c, gxacpath.c, gxclist.c,
gxcpath.c, gxi12bit.c, gxicolor.c, gxifast.c, gximono.c, gxiscale.c,
gxp1fill.c, gxpath2.c)

Gets rid of some remaining vestiges of 16-bit ints.  (gdevm1.c, gsbitops.c)

Adds procedures to register clients for notification when a font is freed.
(gxfont.h, gsfont.c)

Defines the IODevice open_device procedure as returning 1 if it opened a new
stream, 0 if it returned an existing stream.  This eliminates some awkward
externs.

Adds the concept of a stable allocator -- an allocator that allocates from
the same heap and in the same VM space as another allocator, but is not
subject to save and restore.  (gsmemory.h, gsmemraw.h, gsalloc.c,
gsmalloc.c, gsmemlok.c, gsmemret.c, gsnogc.c)

Adds some new macros to make defining new kinds of fixed-format structures
simpler.  (gsstruct.h)

Replaces the text processing restart procedure with a more general resync
procedure, which can be used to restart partway through a string.  We retain
gs_text_restart for backward compatibility and general usefulness.
(gstext.h, gxtext.h, gdevbbox.c, gstext.c, gxchar.c)

Adds the Adobe Latin glyph sets as pseudo-encodings.  (gsccode.h)

Version 5.88 (tester) (8/3/99)

This fileset adds the ability to reference and embed TrueType fonts in PDF output. Unfortunately, even though the resulting PDF files work fine with Ghostscript itself, Acrobat Reader apparently can't handle embedded TrueType fonts with non-standard Encodings. We hope to fix this problem during the 6.0 beta test period.

This fileset also adds the ability to buffer X Windows output in a client-side bitmap. This is typically more efficient than trying to push many small commands through the X client/server knothole, especially if bitmap images or RasterOp are involved.

Some reported problems have been deliberately left unfixed: we will need every minute of the 13 days before the start of the 6.0 beta test period to implement the last few items of functionality scheduled for the 6.0 release, and we can fix problems (but not add functionality) during the beta test period.

Incompatible changes


(Library)
	- The box_device member of the bbox device is replaced by the
box_data member, with a different meaning.
	- The x_rect structure is removed; all uses are changed to
gs_int_rect.
	- gdevpstr.h is renamed spprint.h.
	- The parameter printing procedures are moved from gdevpsdf.[hc] to
spsdf.[hc].
	- Clients must now allocate gs_font* objects using gs_font_alloc or
gs_font_base_alloc, not directly with gs_alloc_struct.
	- The first (vptr) argument of enum_ptrs procedures is now const *.
EV_CONST is no longer defined.
	- The pep argument of enum_ptrs procedures is now enum_ptr_t *
rather than const void **.
	- The font glyph_pieces procedure is replaced with an option for
glyph_info.
	- The font encode_char procedure now takes an additional glyph_space
argument.
	- The o_large flag in object headers is renamed o_alone; o_lmark and
o_lsize no longer exist.  The DO_LARGE and DO_SMALL macros for enumerating
objects in a chunk are also removed.

Documentation


Fixes problems:
	- News entries since 5.72 had a missing <li> in the table of
contents entry.  (doc/News.htm)
	- gs_text_params_t still referred to REPLACE_X_WIDTHS and
REPLACE_Y_WIDTHS rather than REPLACE_WIDTHS.  (gstext.h)

Clarifies that the font glyph_outline procedure must append a final moveto
for the advance width.  (gxfont.h)

Clarifies that the font enumerate_glyph procedure enumerates glyphs in an
unpredictable order.  (gxfont.h)

Documents that reference counted freeing procedures for structures with
finalization must free the structure itself first rather than last.
(gsrefct.h)

Updates documentation on building Ghostscript on MS-DOS and MS Windows.
(doc/Make.htm)

Adds some documentation on how the makefiles are / should be structured.
(doc/Source.htm)

Documents the new parameters for the X driver.  (doc/Use.htm)

Updates the language documentation to refer properly to PostScript
LanguageLevel 3 and PDF 1.3. (doc/Language.htm)

Procedures


Fixes problems:
	- An omitted space in a makefile caused an incompatibility with the
VMS build utilities.  (lib.mak)
	- The gsindent script was omitted from the fileset.  (gsindent)
	- The core library didn't include stream.c, which is now required.
(lib.mak)
	- The workaround for the peculiarities of the Watcom compiler's
command line syntax didn't work.  (zlib.mak)
	- A DOS command line overflowed in the makefile.  We patched this by
deleting the bmpgray device from the Borland Windows platform.
(bcwin32.mak)

Provides a .lnk file required by the revised linking procedures on MS
Windows.  (gsdll32w.lnk)

Straightens out the Watcom makefiles so that it is possible to build a
Windows executable and DLL using the Watcom compiler.  This required moving
some parameters around in the other PC makefiles.  (bcwin32.mak,
msvccmd.mak, watc.mak, watcw32.mak, wccommon.mak, winint.mak, winlib.mak)

Drivers


Fixes problems:
	- The X driver reported the wrong parameter name for errors in th