Changes in the most recent releases of Ghostscript

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: 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 5.50 (9/16/98)


This is the first public release since 5.10.  See the release summary
for a list of major additions and changes.


Documentation


Fixes problems:
	- Many files still referred to .txt rather than .htm files.
(DLL.htm, Make.htm, New-user.htm, Readme.htm, bcwin32.mak, cfonts.mak,
devs.mak, dvx-gcc.mak, dwmainc.cpp, gs-vms.hlp, gxdevcli.h, gxdevice.h,
int.mak, jpeg.mak, libpng.mak, msvc32.mak, msvclib.mak, openvms.mak,
os2.mak, unix-cc.mak, unix-gcc.mak, unixansi.mak, watc.mak, watcw32.mak,
wccommon.mak, zlib.mak)

Notes that ps2epsi.1 and ps2epsi.txt may be inconsistent or obsolete.
(ps2epsi.1, ps2epsi.txt)

Adds a reference to Thomas Merz's Ghostscript manual.  (Readme.htm)

Adds instructions for making RPMs.  (Install.htm, Make.htm)

Changes the URL for post-release notes.  (Bug-form.htm, Make.htm,
New-user.htm)

Notes problems with Watcom compilation.  (Make.htm)


Procedures


Fixes problems:
	- On Unix systems, the documentation files didn't get installed by
`make install'.  (unixinst.mak)
	- $() was missing around MAKEFILE in a Windows makefile.
(msvc32.mak)
	- The dfax drivers didn't include all the necessary files in the
linker list.  (contrib.mak)
	- The MSVC makefiles didn't allow building the executable in a
different directory.  (bcwin32.mak, gs.mak, lib.mak, msvc32.mak,
msvccmd.mak, msvclib.mak, msvctail.mak, os2.mak, watcw32.mak, winint.mak,
winlib.mak)
	- The default build directory for the Borland compiler was debugobj
rather than obj.  (bcwin32.mak)

Adds a patch file and some specification files for making RPMs.  (gs.rps,
gs-fonts.rps, rpm-conf.dif)

Removes the docs target in the makefile, since this function is now
performed by another program.  (unix-end.mak)


Drivers


Fixes problems:
	- The jpeg drivers caused a memory access error.  (bug introduced in
5.20 by an incorrectly made fix) (gdevjpeg.c)
	- The x11cmyk driver implemented map_rgb_color, which it should not
do.  (gdevxalt.c)


Utilities


Fixes problems:
	- echogs -h didn't work in environments where char is signed.
(echogs.c)


Platforms


Fixes problems:
	- MSVC++ 5.0 produced incorrect code with TDEBUG=0.  We "fixed" this
problem by noting in the makefile that TDEBUG must be left set to 1.
(msvc32.mak, msvclib.mak)

Updates the icons for the MS Windows and OS/2 platforms.  (gsgraph.icx,
gsos2.icx, gspmdrv.icx, gstext.icx)


Interpreter


Fixes problems:
	- setpagedevice didn't update the state correctly when switching to
a new type of device (different OutputDevice value).  (gs_setpd.ps)
	- The interpreter's initialization depended on BSS being initialized
to 0.  (files.h, zfile.c)

Removes all references to reloc_struct_ptr other than in gsstruct.h.
(igcref.c)

Adds DEBUG tracing for pdfmarks.  (gs_pdfwr.ps)

Disables TEST code for release.  (zcrd.c, zfdcte.c)


Interpreter (PDF)


Fixes problems:
	- Some third-party software still referred to the obsolete #?
procedure.  (pdf_main.ps)
	- Destinations with string names weren't properly converted to
pdfmarks.  (pdf_main.ps)
	- Destinations with S = /Named weren't supported.  (pdf_main.ps)


Library


Fixes problems:
	- Dropout prevention wasn't applied to landscape image masks.
(gximono.c)
	- When using async rendering, the renderer's allocator was allocated
with the wrong allocator.  (gdevprna.c)
	- gx_strip_bitmap and gx_device_mask_clip didn't have proper GC
descriptors, causing crashes if a GC occurred while rendering an ImageType 3
or 4 image.  (gsstruct.h, gxbitmap.h, gxclip2.h, gxclipm.h, gxmclip.h,
gspcolor.c, gxclipm.c, gxmclip.c)
	- The buffer for printer devices wasn't reallocated properly for
async devices when the page size changed.  We aren't entirely comfortable
with the fix, but it's the best we've got right now.  (gdevprn.c)
	- Some files wouldn't compile with -dNOPRIVATE.  (gxcspace.h,
gscdevn.c, gscolor2.c, gscscie.c, gscsepr.c)
	- gp_semaphore_close and gp_monitor_close were defined as not
returning an error code.  (gpsync.h, gp_nsync.c, gp_posem.c, gp_semon.c,
gp_win32.c)
	- Initialization code depended on BSS being initialized to 0.
(gsiodev.c)
	- The special PCL color mapping device didn't handle CMYK devices
correctly in other than "identity" mode.  (gdevcmap.c)

Cleans up a little formatting.  (gscie.h, gscpixel.c, gxmclip.c)

Removes all references to reloc_struct_ptr other than in gsstruct.h.
(gsstruct.h, gsalloc.c, gsdevice.c, gsfont.c, gxcpath.c)

Patches the async code so that it allocates twice as much space for the
renderer as should be needed, to deal with sandbars.  (gdevprna.c)





Version 5.40 (beta) (9/10/98)


A few more fixes.  This is intended as the candidate fileset for the 5.50
release.


Documentation


Fixes problems:
	- The current GNU Ghostscript version was documented as 3.33, not
4.03.  (New-user.htm)
	- The ansi2knr usage documentation didn't mention --filename.
(ansi2knr.1)
	- A projected completion date was too optimistic.  (ps2pdf.1)

Replaces all documentation files with new HTML versions.  (*.txt [deleted],
*.htm, index.html, imainarg.c)

Adds a contributed set of Emacs macros useful for working with Ghostscript
documentation.  (gsdoc.el)

Changes the version and date format slightly in one file for consistency.
(gs-vms.hlp)


Procedures


Adds a make target (make docs) to touch up documentation files before a
release.  (unix-end.mak)


Utilities


Removes the long-obsolete ps2image.ps utility.  (ps2image.ps [deleted])


Drivers


Adds a driver for the Color LaserJet 5.  (devs.mak, gdevclj.c)


Platforms


Fixes problems:
	- Blanks in command lines weren't handled properly.  (dwmain.cpp,
dwmainc.cpp)


Library


Fixes problems:
	- 16-bit devices didn't convert colors to RGB correctly.
(gdevm16.c)
	- 16- and 32-bit RasterOp didn't work, because pack_from_standard
didn't handle depths greater than 8.  (gdevdrop.c)
	- RasterOps with devices with non-standard color representation
sometimes substituted black or white for the source or target.  (gdevdrop.c)
	- The non-orthogonal case of Axial shading executed the axial-case
code as well.  (gxshade1.c)
	- copy_color on 4-bit-deep memory devices did an unnecessary
fit_copy check.  (gdevm4.c)
	- An upcast was missing.  (gdevbbox.c)
	- View clipping was applied to internal devices, incorrectly.
(gspath.c)

Revises the implementation of shading so as to reduce the use of macros,
update formatting, and help prepare for PatternType 2 patterns.  (gsshade.h,
gxshade.h, gxshade4.h, gscolor3.c, gsshade.c, gxshade.c, gxshade1.c,
gxshade4.c, gxshade6.c)





Version 5.39 (beta) (9/8/98)


A couple more small fixes.


Drivers


Fixes problems:
	- The pkm[raw] drivers didn't work with 32-bit pixels.  (gdevpbm.c)

Adds (fake) 8-, 16-, and 32-bit X11 CMYK devices, for debugging.
Unfortunately, the 16- and 32-bit devices consume the hardware color map and
then no longer behave reasonably; the 8-bit device produces output with
garbled colors (fixed in 5.40).  (devs.mak, gdevxalt.c)


Library


Fixes bugs:
	- All banded devices caused a memory access error.  (bug introduced
in 5.38)  (gsstate.c)
	- The special color mapping device didn't update its state after
put_params.  (gdevcmap.c)
	- RasterOp on 8-bit non-gray-scale devices didn't handle filling
with constant 0 or 1 properly.  (gdevmrop.c)
	- The halftone machinery didn't switch from full-size to strip
halftones early enough, possibly allocating very large halftone data
structures.  (gshtscr.c)
	- If an ioerror (such as a disk- or memory-full condition) occurred
while writing out the band list, the bookkeeping structures were left in an
inconsistent state, causing further problems.  (gxclutil.c)
	- Some shaded fills didn't check for errors when filling
sub-regions.  (gxshade1.c, gxshade4.c)

Cleans up some formatting.  (gxshade6.c)





Version 5.38 (beta) (9/3/98)


The sole purpose of this release was to fix some obscure bugs detected by
the Genoa tests and by another Aladdin project.


Documentation


Updates the list of implemented PostScript LanguageLevel 3 features.
(current.txt)


Drivers


Fixes problems:
	- The PDF writer did the wrong thing for multi-source images with
more than 180 bytes of data (total) per scan line.  (gdevpdfi.c)
	- If one used setdistillerparams, [g]restore caused a rangecheck in
.setpagedevice.  ****** DISABLED FOR DCT DICTS, SINCE THIS CAUSES A SEGV
****** (gdevpsdp.c)


Interpreter


Fixes problems:
	- 0-length parameter arrays were given an arbitrary type, confusing
clients.  (iparam.c)
	- EOD on a write stream caused an error.  (zfileio.c)


Library


Fixes problems:
	- 0-length parameter arrays confused clients that wanted arrays of a
particular type.  (gsparam.c)
	- Patterns with XStep or YStep smaller than the bounding box didn't
work properly.  (gxp1fill.c)
	- Resizing an object sometimes copied it unnecessarily.  (gsalloc.c)
	- Freeing the shared part of a graphics state didn't free its
sub-objects.  (gsstate.c)
	- The standard allocator didn't free its initial (self-containing)
chunk when asked to free itself.  (gsalloc.c)
	- The standard allocator didn't attempt to merge free blocks before
giving up.  We implemented this by adding another virtual procedure to
allocators, consolidate_free.  (gsmemory.h, gsmemraw.h, gsalloc.c,
gsmalloc.c, gsmemlok.c, gsmemory.c)
	- The free object merging algorithm thought there were free objects
even when there weren't.  (Small performance bug only.)  (gsalloc.c)

Adds some more tracing to pattern filling.  (gxclip2.c, gxp1fill.c)

Replaces the cs_alloc, cs_copy, and cs_undo_alloc macros with procedures.
(gxcspace.h, gscolor2.c, gscsepr.c, gscspace.c, gspcolor.c)

Moves the free-object merging code from gsnogc.c to gsalloc.c, so it can be
used even in systems that have a garbage collector.  (gsalloc.h, gxalloc.h,
gsalloc.c, gsnogc.c)





Version 5.37 (beta) (8/31/98)



Documentation


Mentions the new cid2code utility in the documentation.  (psfiles.txt)

Documents dpsnext.dev.  (gs.mak)

Notes that clients of ImageType 3 images are responsible for providing the
mask data before the pixel data.  (gsiparm3.h)


Procedures


Fixes problems:
	- The makefiles were missing a dependency of jconfig.h on arch.h.
With this fix, parallel builds (make -jN) work reliably.  (jpeg.mak)


Utilities


Adds a utility for creating maps from CIDs to Unicode.  (unixinst.mak,
cid2code.ps)


Drivers


Removes the %Fax% IODevice code, since it was only a skeleton and Adobe no
longer supports this facility.  (devs.mak, gdevpfax.c [deleted])


Fonts


Fixes problems:
	- TrueType fonts whose first code wasn't 0 or 0xf000 didn't display
correctly.  (bug introduced in 5.36) (gs_ttf.ps)
	- CIDFontType 0 fonts didn't handle being redefined with another
name.  (gs_cidfn.ps)
	- CIDFontType 0 fonts could get local-into-global-store errors.
(gs_cidfn.ps)
	- PDF files couldn't use already-defined CMap resources.
(pdf_font.ps)
	- Out-of-range CIDs gave an error rather than using a notdef
character.  (gs_cidfn.ps)


Interpreter


Fixes problems:
	- CIDFontType 4 fonts weren't recognized as CID-keyed.  (zchar2.c,
zchar32.c, zfont32.c)
	- When recovering from an error in an operator procedure, the
interpreter didn't update the dictionary stack caches.  (interp.c)
	- startjob didn't reinitialize the stacks or VM space.  (gs_lev2.ps)
	- Encoding filters with a Predictor always caused an error.
(zfilter2.c)
	- currenttrapparams gave an error.  (gs_ll3.ps)
	- settrapparams had no effect, and left the dictionary on the stack.
(gs_ll3.ps)

Finishes implementing Type 32 fonts.  These fonts don't actually work
directly with the cache -- they store the bitmaps in a compressed form in an
ordinary Dictionary -- but they do behave the way they are specified.
(gs_typ32.ps, zchar32.c, zfont32.c)

Cleans up formatting and macros in a few more files.  (ccfont.h, icharout.h,
icstate.h, iutil.h, iutil2.h, ibnum.c, iccfont.c, iccinit0.c, ilocate.c,
isave.h, isave.c, iscannum.c, iutil.c, iutil2.c)

Removes or capitalizes a few more macros.  (zcontext.c, zcssepr.c,
zusparam.c)


Interpreter (PDF)


Fixes problems:
	- Color spaces with subsidiary spaces (Indexed, Separation, DeviceN)
sometimes didn't work properly, because they were translated to PostScript
structures more than once.  (pdf_draw.ps)
	- Type 3 fonts didn't rebind the resource context when executing the
CharProc procedure.  (pdf_font.ps)


Streams


Fixes problems:
	- The CCITTFax decoder signaled an error if it saw an EOB with
EndOfBlock = false.  (According to e-mail from Adobe, EOBs should be
recognized even if EndOfBlock is false, even though the Red Book implies the
opposite.)  (scfd.c)

Cleans up macros and formatting in a few more files.  (slzwce.c, sfxfd.c,
sfxstdio.c)


Library


Fixes problems:
	- Landscape color images usually didn't display.  (bug introduced in
5.32)  (gxicolor.c)
	- If gs_heap_free_object was called with ptr != 0 but bp = 0 (which
is an error), an invalid memory access would occur.  (gsmalloc.c)
	- The left side bearing was still being added in a second time for
the accent of a seac.  (bug probably introduced in 5.20)  (gxtype1.c)
	- An access error occurred when rendering the very last glyph of a
TrueType font with a 2-byte loca table.  (gstype42.c)
	- In the fast portrait case of monochrome images, a numerical error
sometimes produced a 1-bit-wide vertical stripe of an incorrect color at the
right edge of the image.  (gxifast.c)
	- ImageType 3 images with InterleaveType = 3 gave memory access
errors.  (gximage3.c)
	- Hit detection ignored any part of the aperture that had negative X
or Y coordinates.  (gdevhit.c)
	- The special color mapping device didn't copy all necessary values
back from its target.  (gxdevice.h, gdevbbox.c, gdevcmap.c, gsdevice.c)
	- The special color mapping device didn't handle ordinary (Type 1)
images correctly.  (gdevcmap.c)
	- CMYK halftones complemented both the color and the halftone level:
this produced the right number of pixels turned on (only for linear spot
functions or threshold arrays), but wasn't consistent with either the Adobe
specification or the user's intentions.  (gxcht.c)
	- The phase of mask Patterns wasn't always set correctly.
(gxp1fill.c)
	- The reader side of overlapped band devices was confused about its
open/closed status.  (gdevprna.c)

Renames Type 32 fonts from ft_bitmap to ft_CID_bitmap.  (gxftype.h)

Adds some more tracing for composite font decoding.  (gsfcmap.c)

Adds some more tracing for images.  (gxiinit.c)

Cleans up formatting and macros in a few more files.  (gxifast.c)

Moves the image*_type_data and image*_enum_procs_data definitions from
header files into more appropriate .c files.  (gsiparm2.h, gsiparm3.h,
gsiparm4.h, gxiparam.h, gxiinit.c, gximage2.c, gximage3.c, gximage4.c)





Version 5.36 (beta) (8/25/98)


Another set of fixes.  The free-standing bbox device now produces convenient
%%BoundingBox messages.  This fileset also includes support for double-byte
TrueType fonts.


Documentation


Fixes problems:
	- There was a minor spacing glitch in one man page.  (gs.1)
	- The page printed by align.ps didn't make it clear enough what to
do with the numbers it asks users to calculate.  (align.ps)
	- The sample code for adding gamma adjustment didn't work most of
the time.  (devices.txt)
	- The prolog produced by pswrite was completely uncommented.
(gdevps.c)
	- The documentation didn't note that the string block freelist
(sfree) is sorted in address order.  (gxalloc.h)

Notes that FirstBitLowOrder and LowBitFirst are equivalent.  (slzwx.h)

Notes a change in the FTP site of the free Kanji ("Wadalab") fonts.
(fonts.txt)

Adds a pointer to the freely available Unicode CMaps.  (fonts.txt)

Changes an obsolete e-mail address for Carsten Emde.  (contrib.mak)


Utilities


Fixes problems:
	- The viewgif utility sometimes left 1-scan-line gaps when rendering
interlaced images.  (viewgif.ps)


Drivers


Fixes problems:
	- In the PDF writer, downsampled images were always written with 8
bits per sample, not the requested depth.  (gdevpsdi.c)
	- The 8-to-N-bit compression filter produced an extra byte at the
end of each row, and the N-to-8-bit expansion filter skipped an input byte
at the end of each row.  (gdevpsds.c)
	- In the PDF writer, the size of downsampled images for changing the
pixel width was set incorrectly, leading to inconsistent image parameters in
the output.  (gdevpsdi.c)
	- The subsampling filters didn't take a clear position about what to
do with excess input samples beyond a multiple of the reduction factor,
leading to inconsistent image parameters.  We added a Boolean to indicate
whether they should discard the samples or use them to create an additional
output sample.  (gdevpsds.h, gdevpsdi.c, gdevpsds.c)
	- The subsampling filters didn't provide the necessary set_defaults
procedures.  (gdevpsds.h, gdevpsds.c)
	- Because of a typo, pdfwrite and pswrite printed sequences of 4
decimal values wrong. (bug introduced during macro removal in 5.25)
(gdevpstr.c)

Makes the PS writer produce a %%HiResBoundingBox as well as a %%BoundingBox.
(gdevps.c)


Platforms


Fixes problems:
	- The Borland makefile didn't include the MT libraries.  We added a
MULTITHREAD option to this makefile.  (bcwin32.mak)
	- The MSVC makefile didn't include the MT switches in the right
place.  (msvccmd.mak)
	- 'make clean' in the Windows makefiles didn't clean up quite
enough.  (bcwin32.mak, msvc32.mak, msvccmd.mak)
	- The OS/2 makefile had gotten slightly out of date.  (os2.mak)

Cleans up some formatting.  (gp_win32.c)


Fonts


Fixes problems:
	- Loading large TrueType fonts caused excessive garbage collection.
(gs_ttf.ps)

Finishes implementing support for turning double-byte TrueType fonts into
CIDFontType 2 fonts.  (gs_ttf.ps)


Interpreter


Fixes problems:
	- We thought the dictionary returned by currentuserparams should
always be allocated in local VM, but in fact the correct definition is that
it should be allocated in the current VM.  The simplest way to make this
work is for setuserparams to copy any string values into global VM.
(gs_lev2.ps)
	- 1-input stitching functions didn't allow k = 0.  (ifunc.h,
zfunc.c)
	- OtherSubrs defined in PostScript no longer worked.  (bug probably
introduced when we rewrote the Type 1 code in C) (zchar1.c)

Cleans up a few compiler warnings (missing empty 'default' cases, unused
variables).  (igc.c, iname.c)

Replaces some uses of RELOC_*_PTR (now deprecated) with RELOC_*_VAR.
(isave.c, iscan.c)


Interpreter (PDF)


Fixes problems:
	- Resources were re-created on each page, causing (sometimes a lot
of) unnecessary computation.  We implemented most of the machinery for
avoiding this, but not the mechanism for actually storing resources in
global VM.  (pdf_base.ps, pdf_main.ps)

Adds a little more debugging code.  (pdf_draw.ps)


Streams


Cleans up formatting in a few more files.  (sbtx.h, sfilter.h, slzwx.h,
spngpx.h, srlx.h, sstring.h, seexec.c, sfilter1.c, sfilter2.c, smtf.c,
spcxd.c, srld.c, srle.c)

Replaces a couple of #defines with duplicated (small) structures.  (sbtx.h,
sfilter.h, sfilter1.c, sfilter2.c)

Replaces all uses of RELOC_*_PTR (now deprecated) with RELOC_*_VAR.
(stream.c)


Library


Fixes problems:
	- If a garbage collection occurred during a string show operation,
memory could be corrupted. (bug introduced in 5.24) (gstext.h, gstext.c)
	- A debugging check incorrectly indicated an error when
miter-checking lines with a 0 degree angle between them.  (gxstroke.c)
	- A structure created for bitmap/pixmap patterns was never freed.
(gspcolor.c)
	- Colored halftones didn't work with 24-bit devices.  (This case was
never actually used.)  (gxcht.c)
	- CIE colors didn't remap properly if the current color space was a
Pattern space.  (gscie.c)
	- In a non-garbage-collected environment, freeing a string in the
current chunk made an unnecessary test.  (Minor performance impact only.)
(gsnogc.c)

Cleans up a few compiler warnings (missing empty 'default' cases, unused
variables).  (gsht.c, gsht1.c, gshtscr.c, gsimage.c, gxacpath.c, gxclread.c,
gxicolor.c, gxshade4.c)

Replaces some uses of RELOC_*_PTR with RELOC_*_VAR.  (gsht1.c)

Changes the printed output of the free-standing bbox device so it produces
%%BoundingBox and %%HiResBoundingBox lines that can be dropped directly into
a DSC header.  (gdevbbox.c)

Speeds up the 4-bit case of copy_mono by about 30%.  (gdevm4.c)

Expands some macros and cleans up formatting, for easier reading and
debugging.  Speeds up the color halftone generation algorithm substantially
(up to 40%), by skipping the halftone computation for planes that are known
to be solid-color, and using copy_mono directly if only one plane is not
solid-color.  (gxcht.c)





Version 5.35 (beta) (8/18/98)


More updates for 5.3x, specifically fixing problems with halftones on banded
CMYK devices.


Documentation


Fixes problems:
	- The URLs for the third-party libraries were out of date.
(make.txt, jpeg.mak, libpng.mak, zlib.mak)


Drivers


Adds an x11gray4 device for help in debugging.  (devs.mak, gdevxalt.c)


Fonts


Fixes problems:
	- TrueType fonts with more than 64K of data before or after the
glyfs caused an error.  (gs_ttf.ps)


Interpreter


Fixes problems:
	- The dictionary returned by currentuserparams was allocated in the
current VM rather than always in local VM.  (gs_lev2.ps)


Interpreter (PDF)


Fixes problems:
	- CID-keyed fonts caused an error, because their CDevProc was
incorrect.  (pdf_font.ps)


Library


Fixes problems:
	- A comment was duplicated.  (gxht.h)
	- The main procedure of the command list reader was so large that it
couldn't be optimized by many compilers, and was very hard to read.
(gxclrast.c)
	- Banding devices using multi-screen halftones could get memory
access errors because they didn't clear the halftone caches when changing
halftone parameters.  (gxclrast.c)
	- Banding devices using multi-screen halftones didn't set the
halftone phase correctly.  (gxcht.c, gxclrast.c)
	- RasterOp didn't work for 2- or 4-bit gray-scale devices.  It still
doesn't work right, but it's closer.  (gdevm2.c, gdevm4.c, gdevmrop.c)
	- Undefined characters in CMap-based composite fonts caused errors
and possible invalid memory accesses.  (gschar0.c)





Version 5.34 (beta) (8/16/98)


More updates for 5.3x.


Documentation


Updates all of the man pages to new versions.  (gs-vms.hlp, gs.1, pdf2dsc.1,
pdf2ps.1, ps2ascii.1, ps2epsi.1, ps2pdf.1, ps2ps.1)


Procedures


Fixes problems:
	- The MSVC library makefile incorrectly included gp_msio.c.
(msvclib.mak, winlib.mak)


Drivers


Fixes problems:
	- The PDF writer unnecessarily checked for other parameters after a
failing show or pdfmark.  (gdevpdfp.c)
	- The device's BufferSpace parameter was ignored.  (bug introduced
by async rendering code in 5.30) (gdevprn.c)
	- Banding devices smashed the first 4 bytes of each scan line.  (bug
introduced in 5.28) (gxdevmem.h, gdevmem.c, gxclread.c)
	- The phase for colored halftones was set wrong.  (We have "fixed"
this innumerable times, and it is still probably wrong.)  (gxclrast.c)

Replaces the deprecated gx_device_image_xxx calls with the new gx_image_xxx
calls.  (gdevpdfi.c, gdevps.c, gdevpx.c, gdevvec.c)


Interpreter


Fixes problems:
	- The equality test for idiom recognition sometimes incorrectly
returned false.  (zmisc3.c)
	- shfill didn't take the BBox into account.  (It still doesn't.)
(gxshade.c)
	- The status operator could return an incorrect pages or bytes value
for files larger than 2 Gb, rather than giving an error.  (zfile.c)


Library


Fixes problems:
	- The hint tables weren't reset after processing the base character
of a 'seac', leading to incorrect hinting and (for Type 2 CharStrings)
possible mis-parsing of the outline data.  (gstype2.c)
	- When processing a 'seac', the left side bearing was added in
twice, displacing characters to the right.  (bug probably introduced in
5.20) (gstype1.c)
	- RasterOps didn't set the size of the RasterOp texture device,
which caused filling operations involving a colored halftone to be clipped
to an empty rectangle.  (gdevrops.c)
	- When filling with a colored halftone, the RasterOp source was
often disregarded.  (gxcht.c)
	- gx_device_image[_plane]_data and gx_device_end_image took an
unused dev argument, leading to potential confusion.  We deprecated the
gx_device_image_plane_data and gx_device_end_image procedures, replacing
them with macros that call their replacements gx_image_plane_data and
gx_image_end (which no longer have the spurious dev argument).  (gxdevcli.h,
gxdevice.h, gxiparam.h, gdevbbox.c, gdevddrw.c, gdevdflt.c, gsimage.c,
gslib.c, gxclimag.c, gxclrast.c, gximage2.c, gximage3.c, gximage4.c)
	- gs_color_adjust_count, introduced in 5.33 to address the problem
of freeing free-standing patterns, just made things worse.  We are replacing
them with gs_pattern_reference, essentially the procedure introduced in 5.31
that we deleted in 5.33.  (gsccolor.h, gspcolor.h, gscolor.c, gspcolor.c)

Changes hint suppression from a #define to a debugger-settable static.
(gxhint1.c)





Version 5.33 (beta) (8/14/98)


This is the third set of updates for 5.30.  These updates have been driven
mostly by the needs of another Aladdin project, so they haven't included as
many problem fixes as we would normally make.


Platforms


Fixes problems:
	- The thread creation procedure for Win32 called a Windows function
rather than the proper C library function.  (gp_win32.c)
	- In some MS-DOS implementations, the copy command doesn't recognize
the /Y switch.  (bcwin32.mak)


Fonts


Fixes problems:
	- TrueType fonts with *less* than 64K of glyf data stopped working.
(bug introduced in 5.31) (gs_ttf.ps)


Interpreter (PDF)


Fixes problems:
	- Using an Identity function left an extra element on the stack.
(pdf_draw.ps)
	- The syntax of # in names is different in PDF 1.1 and PDF 1.2, but
the PDF 1.2 syntax was always used.  (pdf_base.ps, pdf_main.ps)


Library


Fixes problems:
	- Color images still always caused an error. (bug introduced in
5.32) (gxicolor.c)
	- Because of a typo, the implementation of image types didn't
compile. (bug introduced in 5.32)  (gxiparam.h)
	- Free-standing colors (specifically pattern colors) and color
spaces couldn't be freed.  This required a NON-BACKWARD-COMPATIBLE change in
an internal API used for managing color and color space reference counts.
(gxcspace.h, gsccolor.h, gscdevn.c, gscolor.c, gscolor2.c, gscscie.c,
gscsepr.c, gscspace.c, gspcolor.c)

Cleans up a little more formatting.  (gscspace.h)





Version 5.32 (beta) (8/13/98)


This is the second set of updates for 5.30.


Procedures


Fixes problems:
	- The OS/2 makefile accidentally omitted the OS/2-PM driver.
(os2.mak)
	- The MSVC library makefile didn't work.  (msvclib.mak)
	- Debugging was turned on in the Borland Windows makefile.
(bcwin32.mak)
	- The BEGINFILES2 list was too long in the MSVC makefile.
(msvc32.mak)


Interpreter


Fixes problems:
	- .execn wouldn't accept pseudo-operators.  (iref.h)
	- inustroke with a matrix operand didn't work correctly.  (zupath.c)
	- ImageType 4 images didn't work.  (bug introduced in 5.31)
(zimage3.c)


Interpreter (PDF)


Fixes problems:
	- Forms used more than once caused an invalidaccess error.
(pdf_draw.ps)


Library


Fixes problems:
	- Using a colored pattern with a Pattern color space that included a
base space could access uninitialized floating point values, possibly
causing an arithmetic trap.  (gspcolor.c)
	- RasterOp wasn't implemented for 16- and 32- bit devices.
(gdevm16.c, gdevm32.c, gdevmrop.c)
	- The library test program relied on copysign, which some C
libraries lack.  (gslib.c)
	- The gs_free and gs_heap_free_all debugging printout were included
even if DEBUG wasn't defined. (bug introduced in 5.30) (gsmalloc.c)
	- Color images always caused an error. (bug introduced in 5.30)
(gxicolor.c)
	- Masked images with pis = NULL could cause an error.  (gximono.c)
	- In landscape orientation, masked images didn't guarantee that the
buffer of mask scan lines would be flushed to the mask clipping device
before processing the data being masked.  (gxiparam.h, gxidata.c, gxifast.c,
gximage3.c)
	- Images with source transparency set but CombineWithColor = false
could get an error because of trying to paint with an unloaded
color. (caused by a bug fix in 5.30) (gxdcolor.c, gxiinit.c)





Version 5.31 (limited) (8/11/98)


This is the first set of updates for 5.30.  They fix a few minor build
problems, and some significant problems with bitmap patterns that do not
affect the PostScript or PDF interpreters.

Missing DPS functionality:
	Contexts:
		Free L/G VM when num_contexts goes to 0
		quit should terminate only the current context
		  Contexts terminated on quit or error destroy stacks &
		    close stdin/out
		Monitor-lock oparrays?
		Global VM GC should collect (or at least scan) *all* local
		  VMs that reference it
		How to handle multi-client input?
	Type 2 images:
		UnpaintedPath (generating X exposure events)
		Transformed source
		Overlapping source/dest (affects order)
	NeXT extensions:
		Compositing
		    Storing alpha with X windows
		    Halftoning

Other partially implemented functionality:
  Internal:
	Directory restructuring
	  Create .dev files in GEN directories
	  'make clean' do the right thing
	Typed images in band list
	  (wrong in gxclimag.c, not implemented in gxclread.c)
	General image_plane_data for banding
	alpha/compositing-related:
	  Image alpha data in band list (gxclimag.c?)
	  Compositing through band list (stubbed in gxclimag.c)
	Driver text API (barely started, not documented)
  PDF-related:
	Acrobat Distiller 3.0 pdfmarks (see under Drivers) - untested
  PostScript Level 2+ leftovers:
	HalftoneTypes 6, 10, and 16 (in gs_ll3.ps)
	Type 32 fonts (gs_typ32.ps, zchar32.c, zfont32.c)
  PostScript LanguageLevel 3:
	clipsave/cliprestore (dummy)
	DeviceN color space (zcsdevn.c, gscdevn.c)
	  How to handle arbitrary numbers of colorants?
	  Caching transformed values
	ImageType 3 images (zimage3.c)
	  Library doesn't check ImageMatrix compatibility
	    (see Table 4.24 in PS3 RM draft)
	DevicePixel color space
	  Not enough bits in client or concrete color!
	  What is initial value?
	PatternTypes other than 1
	Functions
	  Monotonicity is implemented only for Exponential and ArrayedOutput
	    (may not be needed at all....)
	Shading
	  Doesn't handle Background, BBox, Extend, or clipping
	Streams
	  LZWDecode LowBitFirst
	  ReusableStreamDecode
	UseCIEColor (see Section 4.8.3 in PS3 RM draft)

Known problems:
	- Setting HWSize by itself with setpagedevice has no effect.
	- When shrinking oversize halftone cells, the current algorithm,
which progressively halves the size, can produce non-monotonic behavior; GS
should either use a monotonic algorithm or give a limitcheck.
(k/jdscreen.ps)
	- In Type 1 fonts, almost-vertical lines that straddle a stem edge
produce uneven output.
	- At some resolutions, gaps occur in some character outlines with
certain Type 1 fonts.  (? - no test file)
	- The Watcom MS Windows makefile (watcw32.mak) doesn't work.
	- The uniprint driver sometimes drops some output, and is very slow
at 720x720 resolution.
	- Halftones look relatively coarse: we should be using a small-scale
version of AccurateScreens (multiple small dot cells with an ordered dither
cell visiting pattern) to get both fine screens and many levels.
	- Since the x11alpha device uses saturation to emulate alpha,
writing anti-aliased objects over dark areas produces incorrect output.
(gdevxalt.c)
	- Setting OutputFile=- should redirect stdout to stderr (or provide
some other way to redirect stdout).
	- There is a problem on page 3 of k/microw-j.pdf, related to Type 0
fonts.
	- Ghostscript can't handle double-byte TrueType fonts.
(/import/fonts/cyberbit/CYBERBIT.TTF)
	- High-level output devices ([e]pswrite, pdfwrite, pxl*) always
produce a single output file rather than a separate file for each page, even
if there is a %d in the OutputFile name.
	- ps2pdf doesn't handle the Distiller 3.0 BP/EP/SP pdfmarks.
(k/pdfmark3.ps)
	- CTM is not set correctly for PostScript pass-throughs in the PDF
interpreter.
	- When attempting both RasterOp and anti-aliasing, the anti-aliasing
takes effect rather than the RasterOp.
	- Selecting the nullpage device initially, gsave, change page
device, grestore produces infinite recursion.
	- The MSVC library and Watcom makefiles are broken.
	- copy_rop doesn't work for 2- or 4-bit devices, because monobit
copy_rop may call other device procedures (fill_rectangle, copy_mono,
tile_rectangle).


Drivers


Moves some casting macros from generic files to the few specific files that
use them.  (gdev4693.c, gdevn533.c, gdevsnfb.c)


Interpreter


Changes ImageType 4 images to match the change in the library interface.
(zimage3.c)


Library


Fixes bugs:
	- The MaskColor elements of ImageType 4 images were defined as int
rather than uint, truncating the range by 1 bit and causing problems in
comparing the mask color against the pixel samples.  (gsiparm4.h,
gximage4.c)
	- A needed cast was missing from gs_malloc_memory_release.
(gsmalloc.h)
	- A needed cast from byte to char was missing.  (gsparams.c)
	- Patterns always allocated a mask for rendering, which for large
patterns specified directly as bitmaps allocated a lot of unnecessary
memory.  (gxcolor2.h, gspcolor.c, gxp1fill.c, gxpcmap.c)
	- Macros simply defining casted versions of variables made the code
hard to debug.  We have only removed the ones that are in generic code (not
drivers) and that cast pointers to gx_device or its subclasses: the only
ones removed from header files were prn_dev in gdevprn.h, mdev in gdevmem.h,
and ccdev, crdev, and cwdev in gxcldev.h.  gdevmem.h, (gdevprn.h, gxclist.h,
gdevabuf.c, gdevm1.c, gdevm2.c, gdevm4.c, gdevm8.c, gdevm16.c, gdevm24.c,
gdevm32.c, gdevmpla.c, gdevnfwd.c, gdevprn.c, gxacpath.c, gxclimag.c,
gxclist.c, gxclpage.c, gxclpath.c, gxclread.c, gxclrect.c)
	- There was no way to free a pattern instance outside the graphics
state.  (gspcolor.h, gspcolor.c)





Version 5.30 (limited) (8/10/98)


This is the first beta candidate for the 5.50 release.  It completes the
merge of the overlapped rasterizing code into the main development line.


Documentation


Fixes bugs:
	- Yves Arrouye's e-mail address was out of date.  (gdevbjc.h,
gdevcdj.c, contrib.mak, devices.txt, unix-lpr.txt)

Makes the warning against using SHARE_JPEG=1 even stronger.  (make.txt,
dvx-gcc.mak, ugcclib.mak. unix*.mak)

Removes information about using DCL files on VMS to build Ghostscript.
(make.txt)

Updates the documentation for begin_typed_image.  (drivers.txt)


Procedures


Fixes bugs:
	- The Unix build procedure didn't create the obj subdirectory
automatically.  (unixhead.mak, unix-end.mak)
	- gsdll_h wasn't defined for the OS/2 PM device.  Fixing this
properly required moving the OS/2 drivers into the same makefile as the MS
Windows drivers, and renaming the file.  (devs.mak, msdevs.mak => pcwin.mak,
winlib.mak)
	- gsiparm4_h was used before it was defined.  (lib.mak)
	- Building with shared libaries still used header files in
Ghostscript's directories, not the ones in /usr/include.  ****** NOT DONE
YET ******
	- The makefiles all assumed they were located in the current
directory, not in the source directory.  (*.mak)

Adds new 'debugclean' and 'pgclean' targets, parallel to 'debug' and 'pg',
for the Unix platforms.  (unix-end.mak)

Changes the management of .dev files so that on Unix platforms, one can
really maintain standard, debugging, and profiling builds simultaneously.
This is a hack, but a fairly reliable one.  (gs.mak, unixhead.mak,
unix-end.mak)

Adds a dummy thread / semaphore / monitor implementation to all platforms
other than Windows.  (dvx-tail.mak, openvms.mak, os2.mak, ugcclib.mak,
unixtail.mak, watc.mak, watclib.mak)


Drivers


Updates driver support to use the new write-position stream.  (gdevpsdf.c)


Platforms


Fixes bugs:
	- The Windows Registry calls didn't deal properly with a null
pointer.  (gp_wgetv.c)

Makes a small change in the platform semaphore / monitor API.  (gpsync.h,
gxsync.h, gp_win32.c, gxsync.c)

Adds a dummy thread / semaphore / monitor implementation.  Note that with
this implementation, async rendering WILL NOT WORK.  (gp_nsync.c)

Adds pthreads thread creation and POSIX semaphores for Unix platforms.  (We
still need to add System V semaphores, which is all that is available on
Solaris and BSDI.)  (gp_semon.c, gp_posem.c, gp_pthr.c).


Fonts


Fixes bugs:
	- CIDFontType 0 fonts didn't select the proper VM space for adding
entries to font dictionaries, and for loading Subrs strings.  (gs_cidfn.ps)
	- TrueType fonts with an odd glyfs length didn't work.  (gs_ttf.ps)
	- TrueType fonts with a Format 3 'post' table didn't work.
(gs_ttf.ps)
	- TrueType fonts where the encoding in the 'post' table didn't cover
the entire set of glyfs didn't work.  (gs_ttf.ps)
	- TrueType fonts with more than 128K of glyfs didn't work.
(gs_ttf.ps)
	- TrueType cmap format 6 didn't work.  (gs_ttf.ps)
	- CIDFontType 0 fonts with hex data didn't skip over the > at the
end of the data.  (gs_cidfn.ps)


Interpreter


Works around the fact that gs_shfill can't do a gs_setcolorspace for color
spaces that require interpreter assistance.  (gs_ll3.ps)

Moves clipsave and cliprestore to C code.  (gs_ll3.ps, zmisc3.c)

Updates some files to reflect the redivision of gsmemory.h and gsstruct.h.
(imemory.h, istruct.h, ialloc.c)


Streams


Adds a stream that just keeps track of the write position.  (stream.h,
stream.c)

Removes the compilation dependency that required all clients of the zlib
filters to be compiled with the zlib source directory in the search path.
(szlibx.h, szlibxx.h, szlib[cde].c)


Library


Fixes bugs:
	- ImageType 4 images with >1 input component didn't work.
(gximage4.c)
	- Sampled functions didn't keep the fractional part when
interpolating, possibly leading to infinite recursion in shading.
(gsfunc0.c)
	- The color error value for shadings was computed incorrectly for
CIE color spaces.  (gxshade.c)
	- The CharstringType 2 'roll' operator rolled the operands in the
wrong direction.  (gstype2.c)
	- Images with RasterOp or transparency didn't retain the current
color properly, leading to unpredictable results.  (gdevmrop.h, gsropt.h,
gdevddrw.c, gdevrops.c, gxdcolor.c, gxiinit.c, gximage3.c)
	- A cast to void * was needed to remove a const modifier.
(gscrdp.c)
	- On 8-bit non-gray-scale devices, RasterOp values of all-0s or
all-1s produced the wrong output.  (gdevmrop.c)
	- The GC procedure for halftone screen enumerators was wrong,
possibly causing invalid memory access errors.  This bug predates 5.10.
(gshtscr.c)
	- An extra pair of string quotes confused some compilers.
(gsshade.c)
	- There were several errors in the CharstringType 2 'flex'
operators.  (gstype2.c)
	- The structure descriptors for devices weren't initialized in
library-only configurations.  (int.mak, gconf.c)
	- The Pattern cache got confused if the current device when a
Pattern color was used wasn't the same as the current device when the
Pattern instance was created.  (gxpcmap.c)
	- The target of forwarding devices wasn't reference-counted
properly.  (gsdevice.c) ****** FIXING THIS PROPERLY WILL BE A LOT OF WORK:
WE ONLY FIXED gs_setdevice_no_erase ******
	- As a result of fixing a typo, the structure declaration for
gx_page_queue was private, causing clients not to compile.  We left it
private and added an instance allocation procedure.  (gxpageq.h, gdevprna.c,
gxpageq.c)
	- The mask for ImageType 3 images was clipped (incorrectly).
(gximage3.c)
	- Interpolated images with negative X->X values in the CTM were
displaced on the page.  (gxiscale.c)

Finishes integrating the asynchronous rendering code.  (gpsync.h, gxclist.h,
gdevprna.c, gsmemlok.c, gxclimag.c, gxclpath.c, gxclutil.c)

Updates the memory manager API for additional flexibility needed for
asynchronous rendering.  (gsmalloc.h, gsmemlok.h, gsmemraw.h, gsalloc.c,
gsmalloc.c, gsmemlok.c)

Updates the standard memory manager to work with a fixed (externally
supplied) set of chunks, needed for asynchronous rendering, removing some
macros in the process.  (gsalloc.h, gsalloc.c)

Updates some code to use more mnemonic variable names.  (gstype2.c,
gxicolor.c)

Removes some macros for better readability.  (gdevmrop.c)

Adds dummy implementations of clipsave and cliprestore.  (gsclipsr.h,
gsclipsr.c)

Implements an alternative, but completely untested, parameter list
serializer based on streams.  (gsparam2.c)

Moves more of the internal memory manager structures from gsmemory.h to
gsstruct.h.  (gsmemory.h, gsstruct.h, gsmemory.c)





Version 5.28 (limited) (8/3/98)


This fileset almost finishes merging in the code for overlapped
("asynchronous") interpretation and rasterizing that gave rise to the
side-branch versions 5.13 and 5.14; eliminates all initialized non-constant
globals from the graphics library (but not from the interpreter); and adds a
few more LanguageLevel 3 features (CIEBasedDEF[G] color spaces, CloseSource
and CloseTarget for streams, Separation base space for Indexed color
spaces).

We were not originally planning to produce another fileset until the code
merge was completed; however, the schedule demands of another Aladdin
project justify another intermediate fileset.


Documentation


Notes that the MSVC++ 5.0 compiler may lock up when compiling gxi12bit.c
with optimization.  (make.txt)


Procedures


Fixes bugs:
	- psl3 didn't include fzlib.  (int.mak)
	- The Windows makefile had the wrong name for a DLL.  (winint.mak)
	- The Borland Windows makefile had several errors.  (bcwin32.mak)

At the request of a user, changes the creation of jconfig.h so it #includes,
rather than copies, arch.h.  (jpeg.mak, gsjconf.h)


Utilities


Fixes bugs:
	- viewpbm.ps scaled the image wrong.  (viewpbm.ps)


Drivers


Fixes bugs:
	- clist_close was declared as an open proc rather than a close proc.
(As it happens, this didn't make any difference.)  (gxclist.c)
	- A comment was improperly terminated.  (gxpageq.h)
	- A needed #include of memory_.h was missing.  (gdevpsde.c)

Integrates nearly all the rest of the code for asynchronous rendering.
(gdevprn.h, gdevprna.h, gxcldev.h, gxclist.h, gxclpath.h, gxclmem.h,
gdevbmpa.c, gdevprn.c, gdevprna.c, gxclbits.c, gxclimag.c, gxclist.c,
gxclmem.c, gxclpath.c, gxclread.c, gxclrect.c)

Changes tracing of memory-based clists to occur only if -Z: is selected,
rather than always if the code was compiled with -DDEBUG.  Note that this is
a NON-BACKWARD-COMPATIBLE CHANGE (but only affects debugging).  (gxclmem.c)

Implements the NumCopies parameter for all page devices, not just printers.
(gxdevcli.h, gxdevice.h, gdevprn.c, gsdparam.c)

Splits off command list writing utilities into a separate file, since
gxclist.c was getting too large.  (gxclist.h, gxclist.c, gxclutil.c)

Splits command list reading into control (gxclread.c) and the actual list
interpreter (gxclrast.c), since the file was getting too large.  (gxcldev.h,
gxclrast.c, gxclread.c)

Distinguishes dev_proc_* (defining a general driver procedure) from
prn_dev_proc_* (defining a printer driver procedure).  Unfortunately, we
have to keep dev_proc_print_page and _print_page_copies for backward
compatibility.  (gdevprn.h)

Splits out of the BMP driver the parts shared with the async version
(gdevbmp.h, gdevbmp.c, gdevbmpc.c).

Changes the band rasterizer to implement get_bits_rectangle rather than
get_bits.  In some cases, this results in much less computation.
(gxclist.c, gxclread.c)

Makes the monochrome H-P printer drivers emit a printer reset when closing
the device.  According to a user, this helps prevent the ink nozzles from
clogging.  (gdevdjet.c)


Platforms


Fixes bugs:
	- The Windows DLL entry point procedure didn't return a value as it
was supposed to.  (gp_mswin.c)

Removes all remaining initialized but non-constant globals, and ensures that
all non-debugging-related BSS variables in the library are explicitly set to
0 at initialization time.  (gp_unix.c)

Improves an error message slightly.  (dwmainc.cpp)


Interpreter


Fixes bugs:
	- The tracing code for restore_resources could access an invalid
address.  (isave.c)
	- sizeof(procedure) is not allowed in ANSI C++.  (opdef.h,
iccfont.c, interp.c, ireclaim.c)
	- A variable was declared incorrectly as bin_token_type_t rather
than bin_seq_type_t.  (iscanbin.c)
	- The behavior of copypage didn't change in LanguageLevel 3.
(gs_init.ps)
	- When grestore et al reactivated a page device, they performed an
initgraphics, which should only be performed by showpage.  (gs_setpd.ps)
	- The RunLengthEncode filter was broken in cases where the caller
supplied a record size.  (bug introduced in 5.2x) (zfilter.c)
	- A needed #include of memory_.h was missing.  (zfreuse.c)
	- On machines with sizeof(long) > sizeof(int), the dictionary form
of image and imagemask didn't work.  (bug introduced in 5.2x) (zimage2.c)
	- exitserver left a 'true' on the operand stack.  (gs_lev2.ps)

Replaces the STACK_LOOP_BEGIN/END macros with procedures.  (We retain the
macros for backward compatibility.)  (istack.h, istack.c, zchar.c,
zcontrol.c, zdict.c, zvmem.c)

Reviews the remaining operator files for ease of reading / debugging,
including removing macros where appropriate.  (z*.c)

Changes the dictionary stack printer to indicate whether the dictionary is
allocated in global or local VM.  (gs_init.ps)

Redefines countexecstack and execstack as operators, solely for the sake of
the Genoa [count]execstack tests.  (gs_init.ps, zcontrol.c)

Changes array/string/packedarray forall not to keep an index on the stack,
solely for the sake of the Genoa [count]execstack tests.  (zgeneric.c)

Finishes implementing CIEBasedDEF[G] color spaces.  (icie.h, zcie.c)

Adds a ColorSpace resource instance for sRGB.  (gs_lev2.ps, gs_res.ps)

Implements CloseSource and CloseTarget for filters.  ****** DOESN'T WORK IF
AN EXCEPTION OCCURS DURING A NESTED CLOSE. ****** (zfile.c)

Allows Separation and DeviceN color spaces as the base space for an Indexed
color space.  (zcsdevn.c, zcsindex.c, zcssepr.c)


Interpreter (PDF)


Fixes bugs:
	- In PDF files, Indexed color spaces with a CIEBasedABC base space
gave an /undefined error.  (pdf_draw.ps)


Streams


Fixes bugs:
	- The report_error member of the DCT streams wasn't initialized
early enough.  (ifilter.h, zfdctd.c, zfdcte.c, zfile.c)

Changes the zlib filters to use the stream's allocator, rather than the
default allocator, for their private storage.  Note that this requires the
stream itself to keep pointers to this storage, for garbage collection.
(szlibx.h, szlibc.c, szlibd.c, szlibe.c)

Updates some clients to use new, simpler GC structure descriptors.  (sdct.h,
sfilter.h, sdctc.c, sfilter1.c)

Adds a close_strm member for the interpreter's use (CloseSource /
CloseTarget).  (stream.h, stream.c)


Library


Fixes bugs:
	- gstate, currentgstate, and setgstate didn't handle the effective
clip path properly, possibly leading to dangling pointers.  (gsstate.c)
	- setrasterop, setsourcetransparent, and settexturetransparent
should all return int rather than void, since they can fail.  (gsrop.h,
gsrop.c)
	- FunctionType 1 functions didn't clip the output value to the
Range.  (gsfunc3.c)
	- A needed cast from byte * to char * was missing.  (gscrdp.c)
	- Some needed #includes of *_.h were missing.  (gscrd.c, gscrdp.c,
gxshade6.c)
	- The prototype for gx_effective_clip_path wasn't #included in a
needed place.  (gsimage.c)
	- RasterOp sometimes didn't work properly for devices whose
representation of white wasn't a pixel value of 0.  (gxdcolor.h, gdevbbox.c,
gdevdbit.c, gdevvec.c, gslib.c, gxdcolor.c)
	- The variable used to detect double declaration of
gs_get_bits_params_t was named incorrectly.  (gxdevcli.h, gxgetbit.h)
	- gs_[eo]clip never retained the clipping path in its original form.
These routines now retain it in the simple case (the old clipping path is a
rectangle, and the new path is completely contained within it).  This
requires a small NON-BACKWARD-COMPATIBLE change in the gx_cpath_intersect
procedure: it no longer updates the new path, and it flattens the path if
needed.  To avoid problems, we renamed this procedure as gx_cpath_clip.
(gsdps.c, gspath.c, gxcpath.c)
	- If the image was empty, gs_image_common_init didn't free the
lower-level enumerator.  (gsimage.c, gxccache.c)

Removes all remaining initialized but non-constant globals, and ensures that
all non-debugging-related BSS variables in the library are explicitly set to
0 at initialization time.  (gxdevice.h, gconf.c, gsdevice.c, gshtscr.c,
gsiodev.c, gsutil.c, gxcht.c)

Finishes implementing table-driven GC descriptors.  We expected it to save
considerable space at negligible time cost; it actually shrank the 1Mb
executable by only about 5K, and slowed down garbage collection by about
2%. (gsfcmap.h, gsstrtab.h [deleted], gsstruct.h, gzpath.h, gsfcmap.c,
gsmemory.c, gsstrtab.c [deleted])

Finishes implementing CIEBasedDEF[G] color spaces.  (gscie.h, gscie.c)

Simplifies some code by removing or redefining macros.  (gxi12bit.c)

Removes all patches made for easier retrofitting of 5.2x code into 5.1x
filesets.  (gdevdrop.c, gdevmrop.c, gslib.c, gspcolor.c)

Reviews a few more files for style and readability.  (gxbitfmt.h,
gxgetbit.h)

Allows Separation (and, if included, DeviceN) color spaces as the base space
of an Indexed color space.  Unfortunately, this involves introducing a new
distinction in color space types, which entails NON-BACKWARD-COMPATIBLE
changes in the color space and color space type structures.  (gxcspace.h,
gscdevn.c, gscolor1.c, gscolor2.c, gscpixel.c, gscscie.c, gscsepr.c,
gscspace.c, gspcolor.c)

Makes a small addition in order to fix an interpreter bug.  (gxfixed.h,
gdevbbox.c)





Version 5.27 (limited) (7/18/98)


This is another "in-flight" snapshot made in preparation for the 5.2x / 5.1x
code merge.  It completes the driver CRD API.


Documentation


Fixes bugs:
	- The reference to psview was out of date.  (new-user.txt)

Adds some pointers to Aladdin Ghostscript mirror sites.  (new-user.txt)

Updates the C style guide a little further.  (c-style.txt)

Adds documentation on driver-supplied CRDs.  (drivers.txt)

Updates the JPEG makefile to mention IJG release 6b.  (jpeg.mak)

Updates documentation to reflect the devs.mak / contrib.mak split.  (README,
devices.txt, drivers.txt, make.txt, new-user.txt, source.txt, use.txt)


Procedures


Fixes bugs:
	- sjpegerr.o was needed even when using the shared JPEG library.
(jpeg.mak)

Changes the name of the jpeg library directory from jpeg-<version> to just
jpeg, to parallel libpng and zlib.  (make.txt, *.mak)

Creates a separate makefile for contributed drivers.  Eventually these
drivers will go in a separate directory.  (devs.mak, contrib.mak, *.mak)


Drivers


Fixes bugs:
	- The pkm driver was absurdly inefficient.  (gdevpbm.c)
	- The psfax driver (which, admittedly, doesn't come close to
working) no longer compiled.  (gdevpfax.c)
	- The ARCHAIC mode of the Epson driver emitted an incorrect
character ('r' instead of ^R).  (gdevepsn.c)
	- The X driver didn't check the calls of XInitImage for error
status.  (gdevx.c)

Updates a client for the change in the names of the gb_ values.  (gdevx.c)

Updates a client for the added param_request procedure.  (gdevpsdf.c)

Reformats all Aladdin-maintained drivers to the new Ghostscript standard
format, using indent.  We deliberately did not reformat user-contributed
drivers, since indent mangles a line once in a while and we do not want to
take responsibility for fixing others' code.  (*.h, *.c)

Adds a default CRD specification to the 'bit' device, for testing.
(gdevbit.c)

Integrates a bit more of the support code for asynchronous rasterizing.
(gxband.h, gxclio.h, gxclist.h, gxclmem.h, gxclfile.c, gxclist.c, gxclmem.c,
gxclread.c, gxpageq.h, gxpageq.c)


Platforms


Adds thread support to the Win32 platform.  (gp_win32.c)


Interpreter


Fixes bugs:
	- Composite fonts with CID-keyed descendants didn't run the
BuildGlyph procedure.  (zchar.c)
	- The internal representation of CMaps was built incorrectly.
(zfcmap.c)
	- Category resources didn't load from files automatically.
(gs_res.ps)

Reformats all files to the new Ghostscript standard format, using indent.
(*.h, *.c)

Reviews most of the operator files for ease of reading / debugging,
including removing macros where appropriate.  (z*.c)

Updates a client for the change in the names of the gb_ values.  (zdevice.c)

Updates a client for the added param_request procedure.  (iparam.c)

Updates clients for the completion of the CRD API.  (zcie.c, zcrd.c)

Increases the initial size of systemdict a little more, to allow for -d and
-s.  (iinit.c)


Interpreter (PDF)


Fixes bugs:
	- Text modes other than 0 didn't work with multiple-byte fonts.
(pdf_ops.ps)
	- There were many bugs in the code for Type 0 and CIDFontType 0
fonts.  (pdf_font.ps)


Library


Fixes bugs:
	- cshow returned a character code of -1 for composite fonts with
FMapType 9 (CMap-based).  (gsfcmap.h, gschar0.c, gsfcmap.c)
	- The GC procedure for enumerating show enumerators was broken.
(bug introduced in 5.24 or 5.25) (gschar.c)
	- dashpath always copied the path, instead of only copying it if
needed.  (gspath1.c)
	- The hint replacement fix in 5.24 sometimes thought a path was
closed when it wasn't, producing gross distortions of some characters.
(gxhint3.c)

Cleans up code for debugging by expanding macros, etc.  (gstext.h,
gschar0.c)

Changes the gb_ values to all caps, in line with general C convention.  This
is a NON-BACKWARD-COMPATIBLE change to an as yet rarely-used API.
(gxbitfmt.h, gdevalph.c, gdevdgbr.c, gdevmem.c, gsalphac.c, gximage2.c)

Enhances the default implementation of parameter lists to allow requesting
individual parameters.  This is needed for the driver CRD API.  (gsparam.h,
gscparam.c, gsparam.c)

Completes the API for driver CRDs, also moving some code from gscie.c to
gscrd.c.  This involves a NON-BACKWARD-COMPATIBLE change in the prototype of
the TransformPQR procedures.  (gscie.h, gscrd.h, gscrdp.h, gscie.c, gscrd.c,
gscrdp.c)

Reformats all files to the new Ghostscript standard format, using indent.
(*.h, *.c)

Splits up gdevmrop.c into 3 files: gdevmrop.c (RasterOp implementation for
memory devices), gdevdrop.c (default and device-independent RasterOp
algorithms), and gdevrops.c (RasterOp-source device).  (gdevmrop.h,
gdevdrop.c, gdevmrop.c, gdevrops.c)





Version 5.26 (limited) (7/7/98)


The purpose of this fileset is to add an API for drivers to provide one or
more device-appropriate CIE rendering dictionaries.  Like 5.25, it is a
"snapshot" fileset not made available even to beta testers.


Procedures


Fixes bugs:
	- An !endif was omitted.  (msvc32.mak)
	- A newly needed Windows library was omitted.  (msvctail.mak)
	- The /Za and /Ze switches were set incorrectly for MSVC.
(bcwin32.mak, msvccmd.mak, watcw32.mak, winint.mak, winlib.mak)


Drivers


Fixes bugs:
	- A closing bracket was omitted (in code that is ifdef'd out).
(gdevpdf.c)


Fonts


Changes the font loader so that instead of pushing systemdict and a small
empty dictionary on the stack before loading a font, it pushes userdict.
This is what Adobe interpreters do, but this will probably break some
PostScript files, specifically ones that redefine 'index'.  I don't see how
the Adobe interpreters can possibly do the right thing for such files.
(gs_fonts.ps, gs_type1.ps)


Interpreter


Updates clients for changes in CRD API.  This involves some changes in
internal procedures.  (gs_lev2.ps, icie.h, zcie.c, zcrd.c)


Library


Fixes bugs:
	- Pickling string, name, and array parameters tried to force
inappropriate alignment.  (gsparams.c)
	- Pickling dictionary parameters wrote the result in the wrong
place.  (gsparams.c)
	- An occurrence of dev_t should have been gx_device.  The compiler
didn't catch this because there happens to be a type named dev_t in
<types.h> (!).  (gxclread.c)

Adds an API for drivers to provide one or more CRDs (as device parameters).
Makes a small but NON-BACKWARD-COMPATIBLE change in the names and argument
lists of the existing CRD API (which is not used by anything in the standard
configuration).  (gscie.h, gscrd.h, gscrdp.h, gscie.c, gscrd.c, gscrdp.c,
gslib.c)





Version 5.25 (limited) (7/1/98)


This is a "snapshot" fileset created for the purpose of merging with a
separate development branch.  While it fixes some significant bugs in 5.24,
it doesn't represent substantial additional progress.


Documentation


Completely rearranges the C style guide, updates it to reflect current
practice, and adds a 1-page summary of the most important points.
(c-style.txt)

Updates the man pages for consistency and to correct minor errors.  (*.1)

Notes that the pjxl300 driver works with the H-P CopyJet.  (devices.txt,
devs.mak).

Notes that in order to deal with over-zealous Solaris security checking,
additional linker switches are needed.  (make.txt, unix*.mak)


Procedures


Fixes bugs:
	- 'make install' didn't get the executable from the right place.
unixinst.mak)
	- COMPILE_INITS=1 didn't work.  (int.mak, geninit.c)
	- The MSVC makefile updates hadn't been applied to the MSVC-only
devices.  (devs.mak)
	- The other PC makefiles didn't define GLCCWIN.  (bcwin32.mak,
watcw32.mak)

Adds bounding box testing to the library test program.  (ugcclib.mak)

Reviews and reformats code for maintainability.  (genarch.c, geninit.c)

Moves the MS Windows-specific devices to a new file.  (bcwin32.mak,
devs.mak, msdevs.mak, msvc32.mak, watcw32.mak)


Platforms


Reviews and reformats header files for maintainability.  (vmsmath.h,
windows_.h)

Removes some no-longer-used files from the fileset.  (overlay.h, gp_itbc.c)


Fonts


Fixes bugs:
	- Substituted fonts had their FontName set to the requested one.
There was a comment in the code saying that some files that depend on this
happening, but Adobe implementations don't do it.  However, aliased fonts in
Fontmap will continue to have the FontName set to the Fontmap key.
(gs_fonts.ps)

Adds the euro symbol at position 240 (0360) in SymbolEncoding.  This is a
PostScript 3 addition, but it's too much work to make it appear there only
if languagelevel >= 3.  (gs_sym_e.ps)


Interpreter


Fixes bugs:
	- The bbox device didn't work if its target was itself a forwarding
device.  (gdevbbox.c)
	- User parameters maintained at the PostScript (as opposed to VM)
level didn't work.  (gs_init.ps)
	- Idiom recognition didn't work.  (gs_init.ps, gs_ll3.ps, zmisc3.c)
	- .beginpage and .endpage could cause an error if the current device
was a page device but was installed with setdevice rather than
setpagedevice.  (gs_setpd.ps)

In the interest of readability, replaces all casting macros with separate
variables, other than those used in enum_ptrs and reloc_ptrs procedures.
Note that doing this for rptr in gc_trace in igc.c will have a significant
performance cost on Intel CPUs, unless the compiler has a very good
optimizer, because it introduces another variable competing for scarce
registers in the most performance-critical section of code in the garbage
collector.  (ialloc.c, igc.c, iparam.c, isave.c, istack.c, zchar42.c,
zfproc.c, zusparam.c)

Changes some macros to procedures.  (igc.c, ilocate.c, zusparam.c)

Changes some macros to static quasi-constants (only variable for debugging).
(zvmem.c)

Adds #include "errors.h" to oper.h, removing it from z*.c.  (oper.h, z*.c)

Reviews and reformats some header files for maintainability.  This is an
ongoing project.  (bfont.h, errors.h, iinit.c)

Consolidates and simplifies the reading and writing of binary tokens and
binary object sequences.  (bseq.h [deleted], btoken.h, ibnum.h, ibnum.c,
iscanbin.c, zbseq.c)

Adds dummy user and system parameter entries for all the parameters listed
in Appendix C of the PostScript Red Book: even though the book clearly says
that no PostScript program should rely on the presence of any particular
parameter, PostScript files routinely assume the existence of the parameters
listed in Appendix C.  (gs_init.ps, gs_lev2.ps, gs_res.ps)

Adds dummy user and system parameter entries for the new parameters listed
in the 3010 Supplement.  (gs_ll3.ps)

Adds double-inclusion protection to all header files.  (*.h)

Moves the creation of binary object sequence headers from C to PostScript
code.  (zbseq.c, gs_btokn.ps)

Adds support for multiple FormTypes and ColorRenderingTypes.  (gs_init.ps,
gs_lev2.ps, gs_res.ps, zcrd.c)

Updates structures and clients for the introduction of "raw memory"
allocators.  (ialloc.h, igc.h, ialloc.c, imain.c, isave.c)

In the interest of readability and being able to use GNU indent to create
standard formatting, changes the operator tables from procedures back to
data structures.  This change is backward-compatible for all operator files,
although we also edited all of Ghostscript's own operator definitions to
remove the BEGIN_OP_DEFS and END_OP_DEFS macros (which now have to generate
a little unnecessary code for backward compatibility). (opdef.h, iconf.c,
iinit.c, iutil.c, z*.c)

Splits zchar2.c into a Level 1+ part and a Level 2 part.  (zcfont.c,
zchar2.c)


Interpreter (PDF)


Adds font synthesis based on the FontDescriptor.  Currently this is very
rudimentary.  (pdf_font.ps)


Drivers


Fixes bugs:
	- The PDF writer didn't default to A4 paper size if A4 was selected
as the default in the makefile.  (gdevpdf.c)
	- The default implementation of the begin_image procedure always
called the image's begin_image implementation, rather than the device's
begin_typed_image implementation.  (gdevddrw.c)
	- The bbox device didn't initialize its reference count.
(gdevbbox.c)
	- A necessary cast was omitted.  (gdevpsde.c)

Changes some macros to procedures.  (gdevpstr.h, gdevpstr.c)

Adds an internal device to implement the PCL5 special color mapping
algorithms.  (gdevcmap.h, gxdevice.h, gdevcmap.c, gdevnfwd.c)

Adds double-inclusion protection to all header files.  (*.h)

Updates drivers for the change in begin_image.  (gdevbbox.c, gdevpdfi.c,
gdevvec.c, gxclimag.c)


Library


Fixes bugs:
	- The non-ANSI definitions of CLEAR_MARKS_PROC, ENUM_PTRS_BEGIN_PROC
and RELOC_PTRS_BEGIN were missing a parameter.  (gsstruct.h)
	- A few necessary casts were omitted.  (gsparam.c, gxpcmap.c)
	- Images or Patterns with non-default RasterOps could cause crashes.
(gdevmrop.c, gxp1fill.c)
	- Exponential Interpolation functions with non-integral positive
exponents incorrectly required the lower bound of the domain to be strictly
positive rather than only non-negative.  (gsfunc3.c)
	- The attempt to achieve the desired color smoothness when shading
could compute (nearly) forever.  (gxshade.c, gxshade1.c)
	- The arc change in 5.24 caused arcs to render incorrectly.
(gspath1.c)
	- The macro-reducing cleanup in 5.24 introduced a bug in handling
copy operations with negative skew.  (gdevm1.c)

Adds unmasked images and bounding box testing to the library test program.
(gxdevcli.h, gslib.c)

Changes some macros to procedures.  (gxfunc.h, gsfunc.c, gsfunc0.c,
gsfunc3.c)

Adds double-inclusion protection to all header files.  (*.h)

Reviews and reformats header files for maintainability.  (*_.h, dodebug.h
[deleted])

Changes the structure of the common part of the image enumerator to include
the device (which may be different from the original device, because of
forwarding), and to access the procedures through a pointer to a const
structure.  This is a NON-BACKWARD-COMPATIBLE CHANGE for implementors of
begin_image, since they now must pass the device to
gx_image_enum_common_init.  (gximage.h, gxiparam.h, gdevddrw.c, gdevdflt.c,
gxiinit.c, gximage3.c, gximage4.c)

Adds tests of the new color mapping device to the library test program.
(gslib.c)

Removes the last vestiges of segmented pointers.  (genarch.c, std.h)

Introduces a "raw memory" API, primarily for managing the underlying memory
pool for embedded systems.  This involves a NON-BACKWARD-COMPATIBLE-CHANGE
in the implementation (but not ordinary clients) of allocators.
(gsmemory.h, gsmemraw.h, gxalloc.h, gsalloc.c, gsmalloc.c, gsmemory.c)





Version 5.24 (limited) (6/17/98)


In addition to the usual bug fixes, and a few enhancements where temptation
proved irresistible or in response to an external need, this fileset:

	- Takes the first steps on a major readability cleanup
	(4-space indentation instead of 2, replacement of macros by
	procedures, ....)

	- Implements a bit more of the DPS functionality, including view
	clipping, and gstate stack copying for 'fork'.

	- Starts to sketch a text API for drivers.

	- Changes the Unix makefiles so that they create production binaries
	in a separate directory.

Again, there are some non-backward-compatible changes required by other
architectural improvements.  As always, we have tried to minimize the impact
of such changes on users' code.


Documentation


Fixes bugs:
	- The -Kn switch wasn't documented.  (use.txt)
	- The term "Software" was used instead of "Program" in the last
paragraphs of the license.  (PUBLIC)

Adds a couple of missing operators to the list at the end of ostack.h.
(ostack.h)

Documents more precisely which gstate points to which objects after various
gstate operations.  (gsstate.c)

Corrects some addresses for the Free Software Foundation.  (commprod.txt,
new-user.txt)

Improves the documentation for memory management of color spaces.  (gscie.h,
gscolor2.h)

Updates the list of hardware available to Aladdin.  (new-user.txt)

Documents ReopenPerPage.  (language.txt)

Moves the documentation of image rendering procedures to a better place.
(gximage.h, gxiinit.c)

Clarifies that old slzwe.c files may not work with current Ghostscript
versions.  (make.txt)


Procedures


Fixes bugs:
	- psl3.dev didn't include func.dev.  (int.mak)
	- device and device2 devices weren't sorted together, causing
devices to appear in the list out of order (including, possibly, selecting
the wrong device as default).  (genconf.c)
	- The mswindll module definition omitted some needed files.
(devs.mak)

Changes the optimization level for gcc from -O to -O2 for both standard and
profiling builds.  (unix-gcc.mak)

Defines 3 new makefile macros for the Unix platforms,
CFLAGS_{STANDARD|DEBUG|PROFILE}, that give the additional compiler switches
for these 3 compilation options.  (unixansi.mak, unix-cc.mak, unix-gcc.mak)

Changes the Unix makefiles so that by default they create the binaries in an
'obj' subdirectory of the source directory.  (unixansi.mak, unix-cc.mak,
unix-gcc.mak, unix-end.mak)

Updates the MSVC++ makefiles so they allow setting any configuration
parameter from the make command line.  (msvc32.mak, msvccmd.mak, msvccom.mak
[deleted], msvclib.mak, msvctail.mak)


Utilities


Fixes bugs:
	- ps2ascii was broken.  (ps2ascii.ps)

Adds capability to gslp.ps:

	- Variable-width fonts (but without automatic line breaking);

	- Pair kerning (from AFM file);

	- Inter-character and space width adjustment.

This project was done for a paying customer.  (gslp.ps)


Drivers


Fixes bugs:
	- The name of the plan9bm device was wrong.  (gdevpbm.c)
	- The PDF writer wrote incorrect parameters for the CCITTFax filter
used to compress Type 3 font bitmaps.  (bug introduced in 5.23) (gdevpdfi.c)
	- The PDF writer emitted two 'endobj' lines for Type 3 bitmap fonts.
(gdevpdf.c)

Removes all remaining uses of _ds and _ss in Aladdin's drivers.  (gdevprn.h,
gdevsvga.h, gdevbit.c, gdevcgm.c, gdevdjet.c, gdevmsxf.c, gdevpbm.c,
gdevpccm.c, gdevpcfb.c, gdevpdfi.c, gdevprn.c, gdevsvga.c, gdevtfax.c)

Renames a local macro named END.  (gdevcgml.c)

Removes all uses of far_data other than for device (but not device2)
prototypes.  (gdevbit.c, gdevdjet.c, gdevemap.c, gdevmsxf.c, gdevpbm.c,
gdevpcfb.c, gdevpcx.c, gdevpdf.c, gdevpng.c, gdevps.c, gdevpsim.c, gdevpx.c,
gdevtfax.c, gdevtfnx.c, gdevvglb.c, gdevx.c, gdevxalt.c)

Adds a psrgb driver that writes PostScript (Level 2) planar,
run-length-compressed, 24-bit RGB images.  (gdevpsci.c)

Starts to define and implement a driver procedure for text.  This interface
will certainly change in the future as we get more insight into the division
of responsibility and control flow between generic code, individual drivers,
and internal and external fonts.  This involves a major
NON-BACKWARD-COMPATIBLE CHANGE in the gs_show_enum structure (which no
client should be accessing directly).  (gdevmem.h, gdevprn.h, gstext.h,
gxchar.h, gxdevcli.h, gxdevice.h, gxtext.h, gdevbbox.c, gdevht.c,
gdevnfwd.c, gschar.c, gschar0.c, gstext.c, gxacpath.c, gxclip.c, gxclip2.c,
gxclipm.c, gxclist.c, gxpcmap.c)

Extends the parameter list printer to handle names and arrays.  (gdevpsdf.c)

Implements the ability to write out a Type 1 font definition, for embedding
fonts in PDF output.  Currently this code isn't called from anywhere, and it
will certainly be subject to change in the future.  (gdevpsdf.h, gdevpdfi.c,
gdevpsde.c, gdevpsdf.c)

Adds the PCL XL Protocol Class 2.0 operators, attributes, and enumerated
values to the relevant header files.  (gdevpxat.h, gdevpxen.h, gdevpxop.h)

Converts some additional devices to -dev2, to make them const.  (devs.mak,
gdevjpeg.c)

To help in debugging, changes all uses of
	#define ss ((stream_xxx_state *)st)
to
	stream_xxx_state * const ss = (stream_xxx_state *)st;
(gdevpdfi.c, gdevpsdi.c, gdevpsdp.c, gdevpsds.c)

Massages mem_mono_copy_mono and mem_mono_strip_tile_rectangle to reduce the
use of macros somewhat.  (gdevm1.c, gdevmem.h)

Makes a change to support the change in gs_param_list_common.  (gdevpsdf.c)

Replaces all remaining uses of do { ... } while (0) with BEGIN ... END.
(gdevpdfm.c, gdevpx.c, gdevx.c, gdevxalt.c)

Adds a ReopenPerPage Boolean device parameter for printers, which causes the
output file to be closed and reopened for each page.  This may be helpful in
persuading spoolers to start printing as soon as the first page is
available.  (gdevprn.h, gdevprn.c)

Makes the %-format validator for output file names a procedure, even though
it's only called in one place.  (gdevprn.c)

Updates some clients for the change from std_procs to procs.  (gdevp2up.c,
gdevpbm.c, gdevupd.c,

Removes the use of the CleanFaxData tag (327) from TIFF output, since many
applications don't recognize it and it isn't in the TIFF 6 documentation.
(gdevtifs.h, gdevtfax.c)


Platforms


Adds a new gp_setmode_binary platform procedure, to set a file into binary
mode on platforms that distinguish text and binary.  (gp.h, gp_*.c)


Fonts


Fixes bugs:
	- The derived (Bold, Oblique, ...) Hershey fonts were broken.
(fonts/makeher.ps, fonts/h*.ps)


Interpreter


Fixes bugs:
	- As always, gcc failed to report some signed/unsigned char *
mismatches.  (imainarg.c)
	- Some needed #includes were missing.  (zcrd.c, ztype.c)
	- Contexts were always allocated in global VM (should be local VM),
and were freed in the current VM (should be local VM).  Fixing this required
changing some internal interfaces defined in icontext.h.  (icontext.h,
icontext.c, interp.c, zcontext.c)
	- restore did some unnecessary gsaves.  (zvmem.c)
	- Creating a new context didn't initialize the graphics state
properly, and didn't do the first gsave that grestoreall relies on.
(gs_dps.ps)
	- The bookkeeping for open files didn't work with multiple contexts.
Fixing this required a substantial (simplifying) redesign of the
interpreter's bookkeeping for streams in general: this may have introduced
new bugs.  (files.h, ireclaim.c, isave.c, zfile.c)
	- fork didn't copy the graphics state stack.  (zcontext.c)
	- The space bits were set incorrectly in the array reference for the
operand stack, causing the garbage collector not to mark the operand stack
of contexts other than the current one.  (interp.c)
	- LanguageLevel 3 facilities weren't enabled when desired.
(gs_ll3.ps, ilevel.h, opdef.h, iinit.c, zcsdevn.c, zimage3.c, zmisc2.c,
zmisc3.c, zshade.c, ztrap.c)
	- flushfile with a procedure-target stream didn't pass the buffered
data to the procedure.  We tinkered with this a little, but it still isn't
fixed.  (zfilter.c, zfproc.c)
	- The top-level color space objects allocated by the CIE color space
setting operators were never freed (until garbage collection).  (zcie.c)
	- setpagedevice with a 0-size page didn't fail.  (gs_setpd.ps,
zmedia2.c)
	- If one or more of the matrices in a CIE color space or CRD was
singular, setcolorspace or setcolorrendering could cause a stackoverflow.
(zcie.c)
	- defineuserobject didn't work.  (I don't see how it could ever have
worked.)  (gs_dps2.ps)
	- The version string wasn't read-only.  (gs_init.ps, gs_lev2.ps,
gs_ll3.ps)
	- Some standard resource categories weren't defined (which they need
to be, even if they have no instances).  (gs_res.ps, gs_ll3.ps)
	- The Trapping ProcSet was empty.  (gs_ll3.ps)
	- setvmthreshold didn't accept a value of -1.  (gs_lev2.ps,
gs_pdfwr.ps, zusparam.c, zvmem2.c)
	- Binary tokens containing native reals with swapped byte order
didn't read in properly.  (ibnum.c, iscanbin.c)
	- In binary object sequences, many executable objects were
incorrectly written out as literal.  (zbseq.c)
	- String DataSources for shadings didn't work.  (zshade.c)
	- Parameter dictionaries with integer keys didn't work.  (iparam.c)
	- A "can't happen" condition caused massive confusion instead of a
rangecheck error.  (gs_setpd.ps)
	- setcachelimit and setcacheparams were broken, because they no
longer interacted correctly with setuserparams and setsystemparams.
(gs_lev2.ps)
	- The source width and height of images was arbitrarily limited to
32767.  (zimage2.c)
	- The optional dictionary parameter for filters was the last
operand, not the first.  (zfbcp.c, zfdecode.c, zfilter.c, zfilter2.c,
zfilterx.c, zfzlib.c)
	- If the current color space was Indexed, Separation using the
alternative space, or DeviceN using the alternative space,
currentgray/cmykcolor/hsbcolor/rgbcolor returned 0 rather than the
underlying color.  (This was a correction to the Red Book in the 3010
Language Supplement, Section D.2.4 and D.2.5.)  (gscolor.c, gscolor1.c,
gxcspace.h)

Implements some additional LanguageLevel 3 stream facilities:
	- CloseSource and CloseTarget (parsing only).  (ilevel.h, zfilter.c)
	- Dictionary argument for SubFileDecode.  (zfilter.c)
	- UnitSize (fully implemented) and LowBitFirst (parsing only) for
	LZWDecode. (zfdecode.c)
	- ReusableStreamDecode (incomplete).  (gs_ll3.ps, zfreuse.c)

Removes all remaining uses of _ds and _ss.  (bfont.h, errors.h, files.h,
icie.h, idict.h, idparam.h, ifunc.h, iscan.h, iutil2.h, opdef.h; iccfont.c,
idict.c, idparam.c, igc.c, iinit.c, iparam.c, iscan.c, iscannum.c, iutil2.c,
zcid.c, zcie.c, zdevice2.c, zfdecode.c, zfile.c, zfileio.c, zfont0.c,
zfont2.c, zfont42.c, zfunc.c, zht2.c, zusparam.c)

Removes the use of gs_if_debug_c.  (zvmem2.c)

Updates clients for the change in color space num_components.  (zcolor2.c,
zcsindex.c, zcssepr.c, zpcolor.c)

Changes the stack manager so it can ensure an unused margin above the top
element.  This is needed for a possible change in the operator API.
(istack.h, istack.c)

Decouples the definition of the interpreter instance from the definition of
the exported procedures that use it, so that we can use it in more places
internally.  (iminst.h, main.h)

Removes all initialization of static per-context state.  (iinit.c, iscan.c,
zmath.c)

Makes the freeing of VM spaces entirely dependent on the number of contexts
referencing them, removing the special handling of interpreter termination.
(icontext.h, gsalloc.c, icontext.c, inouparm.c, interp.c, zcontext.c,
zusparam.c)  ****** IN PROGRESS ******

Enables printing of time and memory usage even in non-DEBUG systems, for
benchmarking.  (imain.c)

Adds a .forceundef operator to parallel .forceput.  (gs_init.ps, zdict.c)

Rewrites the Form caching code to use the Pattern cache.  (gs_fform.ps)

Removes all uses of far_data.  (imain.c, imainarg.c, iname.c, opdef.h)

Moves responsibility for null page devices from C code to PostScript code.
(gs_setpd.ps, igstate.h, zdevice2.c, zgstate.c)

Changes the context scheduler to not store or reload the state when
switching from a context to the same context.  (zcontext.c)

Moves .registerencoding from C code to PostScript code.  (gs_init.ps,
zfont2.c)

Splits off inames.h (API for names and the name table) from iname.h (API for
the interpreter's name table); renames the_nt as the_gs_name_table, and
moves it to imain.c.  We would like to rename iname.h as names.h, but there
are too many places that include it.  (igc.h, iname.h, inamedef.h, inames.h,
imain.h, idict.c, idstack.c, igc.c, iname.c, interp.c, isave.c)

Splits off iestack.h and iostack.h from estack.h and ostack.h, as was done
for [i]dstack.h in 5.23.  (estack.h, iestack.h, iostack.h, ostack.h,
interp.c)

Splits off the hit detection device from the user path code, moving it to
the library level where it belongs.  (zupath.c)

Updates the interpreter for the changes in the enum_ptrs, reloc_ptrs, and
clear_marks memory management procedures.  (igc.c, igcref.c, ilocate.c,
zcontext.c)

Removes all uses of 'near' from the interpreter: if short and long calls
have different formats, we rely on the compiler to generate the most
efficient one.  (iccfont.c, imainarg.c, iparam.c, zdevice2.c, zdouble.c,
zdps.c, zgstate.c, zmatrix.c, zpath.c, zpath1.c, zrelbit.c, ztype.c)

Makes a couple of minor changes to support the change in
gs_param_list_common.  (iparam.h, iparam.c)

Changes internaldict to an operator, and executive and findencoding to
procedures, in order to satisfy the Genoa FTS.  (gs_dps.ps, gs_init.ps,
gs_res.ps)

Updates clients for the addition of device reference counting.  (zpcolor.c,
zupath.c)

Replaces all remaining uses of do { ... } while (0) with BEGIN ... END.
(istruct.h, opcheck.h)

Adds a debugging operator for printing out a Type 1 font.  (zfont1.c)

Updates the Type 1 font operators for the change in the procedure structure.
(zchar1.c, zfont1.c)

Updates one client for the change in the gs_show_enum structure.  (zchar.c)

Removes an obsolete "hook" put in for a customer.  (zchar.c)

Removes the BigStringEncode filter, which was only used by a former
customer.  (zfilter.c)


Interpreter (PDF)


Fixes bugs:
	- Images defined in non-Device color spaces were broken.
(pdf_draw.ps)

Removes some vestiges of the old pdf2ps.  (pdf_draw.ps, pdf_main.ps)

Adds some leftover PDF 1.2 features:

	- F, FFilter, and FDecodeParms keys in stream dictionaries.
	(pdf_base.ps)

	- Functions, including predefined spot functions.  (pdf_draw.ps)

	- Name trees.  (pdf_base.ps)

Adds some PDF 1.3 features.  Note that these require a fair amount of
PostScript LanguageLevel 3 support.  Note also that none of these have been
tested yet, because we don't have any source of test files.

	- DeviceN and (stubbed) ICCBased color spaces.  (pdf_draw.ps,
	pdf_ops.ps)

	- Additional extended graphics state parameters.  (pdf_draw.ps)

	- Number trees.  (pdf_base.ps)

	- Masked images.  (pdf_draw.ps)

Works around a bug in pdfTeX, which can generate Encoding vectors containing
nulls.  (pdf_font.ps)


Streams


Fixes bugs:
	- A needed #include of memory_.h was missing.  (sdeparam.c)
	- The needed input buffer size for the RunLengthEncode filter was
128, but should be 129.  (srle.c)
	- The ASCII85Encode and ASCIIHexEncode filters sometimes didn't
insert \n characters often enough.  (sfilter2.c, sstring.c)
	- In one obscure boundary case, the CCITTFaxEncode filter with K =
-1 could emit an extra, incorrect code.  (scfe.c)
	- The CCITTFaxDecode filter didn't default DamagedRowsBeforeError to
0.  (scfx.h)

Removes all remaining uses of _ds and _ss.  (sfilter.h, sbcp.c, scfe.c,
seexec.c, sfilter1.c, sstring.c)

Removes the use of do_debug.  (scfd.c)

Removes all uses of far_data.  (scf.h, scfdgen.c, scfdtab.c, scfetab.c,
sjpegerr.c)

Removes the save_count member of streams, which is now no longer needed.
(stream.h)

To help in debugging, changes all uses of
	#define ss ((stream_xxx_state *)st)
to
	stream_xxx_state * const ss = (stream_xxx_state *)st;
(sbcp.c, sbhc.c, sbwbs.c, scfd.c, scfe.c, sdctc.c, sdctd.c, sdcte.c,
seexec.c, sfilter1.c, sfilter2.c, sfxfd.c, sfxstdio.c, siscale.c, slzwc.c,
slzwce.c, slzwd.c, smtf.c, spdiff.c, spngp.c, srld.c, srle.c, sstring.c,
szlibc.c, szlibd.c, szlibe.c)

Changes all groups of statistic-gathering variables to be structure
variables named stats_*.  (scfe.c)

Rewrites the CCITTFaxEncode filter to cut down one particularly large and
obnoxious macro, and to simplify the code by allocating an output buffer as
well as an input buffer.  (scf.h, scfdgen.c, scfe.c, scfetab.c)


Library


Fixes bugs:
	- The masked image clipper sequenced through mask rows incorrectly.
(gxclipm.c)
	- gx_[c]path_init_local_shared were declared as returning void, but
could actually return an error.  (gxpath.h, gxcpath.c, gxpath.c)
	- As always, gcc failed to report some static/non-static
inconsistencies.  However, to my dismay, I find that the ANSI C standard
allows these, so I'll have to stop complaining about them.  (gxclimag.c,
gxclipm.c)
	- As always, gcc failed to report some signed/unsigned char *
mismatches.  (gdevpdfi.c, gsparam.c)
	- A loop counted on a non-existent zero value to mark the end of the
IODevice table.  (gsiodev.c)
	- Some needed #includes of memory_.h were missing.  (gdevddrw.c,
gscolor2.c, gscrdp.c, gscspace.c, gxclipm.c, gximage3.c, gxshade4.c)
	- Pattern device colors didn't have access to the original halftone
phase, making it impossible to handle non-standard X/YStep correctly.
(gsdcolor.h, gspcolor.c)
	- Pattern filling disregarded the phase.  THIS MAY UNDO A FIX MADE
IN 5.02.  WE NEED TO RE-TEST PATTERNS CAREFULLY.  (gxp1fill.c)
	- restore did some unnecessary gsaves.  (gsstate.h, gsstate.c)
	- The reference counting macros could read from an object after
freeing it.  (gsrefct.h)
	- setgstate and currentgstate freed the view clipping path, which
they shouldn't do.  (gsstate.c)
	- If no view clipping path was set, viewclippath returned the entire
extent of the device, not the imageable area.  (gxpath.h, gsdps.c, gspath.c)
	- Assigning one stack-allocated path to another incorrectly wound up
sharing their segments.  (gxcpath.c, gxpath.c)
	- dot_length_absolute was incorrectly declared as float rather than
bool.  (gxline.h)
	- The test for varying-depth banded images was incorrect, causing
varying-depth images to be treated as constant-depth.  (This only affected
ImageType 3 images.)  (gxclimag.c)
	- Failure to clamp Y values when processing banded images could
cause crashes or invalid band list data.  (gxclimag.c)
	- The changes in gsparam.c introduced in 5.23 made the coercion of
int arrays to float arrays fail.  (gsparam.h, gsparam.c)
	- Interpolated banded images could be transmitted incompletely,
causing narrow stripes to be chopped out of their rendering.  (gxclimag.c)
	- FunctionType 0 functions with 32-bit samples didn't read their
data correctly.  (gsfunc0.c)
	- Lattice-form Shadings with packed coordinates could crash or
produce incorrect results.  (gxshade.c)
	- Lattice-form Shadings with packed coordinates always returned an
error.  (gxshade4.c)
	- If the PaintProc of a Pattern or a Form, or a CharString
procedure, or a similar callback copied the current graphics state with
gstate or currentgstate, a dangling reference to the device could result.
Fixing this required adding a reference count to devices: internally created
devices initialize it to 0, externally visible devices initialize it to 1.
THIS IS A DELICATE CHANGE AND WILL PROBABLY HAVE A BUG TAIL.  (gsdevice.h,
gxdevcli.h, gxdevice.h, gdevmem.c, gdevmrop.c, gdevnfwd.c, gschar.c,
gsdevice.c, gsmemory.c, gspaint.c, gsstate.c, gxacpath.c, gxccman.c,
gxclip.c, gxmclip.c, gxpcmap.c)
	- The return_if_error macro referred to code rather than code_.
(gserror.h)
	- Non-monotonic halftones didn't allocate enough slots in the
halftone cache.  (gxht.c)
	- setpagedevice with a 0-size page didn't fail.  Fixing this
required making the nullpage device provide explicit InputAttributes.
(gdevnfwd.c)
	- Halftone angles were often slightly off.  (gshtscr.c)
	- Banded fill_mask operations (used for characters) were sometimes
broken.  This bug was obviously introduced since 5.10; I'm surprised that it
didn't have more serious effects.  (gxclread.c)
	- Partially transparent patterns didn't work with non-default
RasterOp values.  (gxp1fill.c)
	- The default implementation of strip_copy_rop didn't handle color
space conversion properly.  (gdevmrop.c)
	- Hint replacement could cause the initial moveto and final
closepath of a Type 1 outline to differ, confusing the filling code.
(gxhint3.c)
	- Interpolated images were truncated at the bottom.  (but probably
introduced in 5.23) (gxiscale.c)
	- Using an unsigned type for the index passed to enum_ptrs
procedures caused comparisons against signed values to be incorrect.
(gsstruct.h)

Rewrites the rectangle list and mask clipping algorithms to use callback
procedures rather than macros.  The rectangle list source code grew by 20%,
but the compiled code shrank from 10K to less than 4K; the mask clip source
code and compiled code both shrank.  (gxclip.h, gxmclip.h, gxclip.c,
gxclip2.c, gxclipm.c, gxcpath.c)

Removes all remaining uses of _ds and _ss.  (gsmemory.h, gsstruct.h, gzht.h,
stdpre.h, gp_dosfb.c, gsbitops.c, gscie.c, gsht.c, gstype1.c, gstype2.c,
gxclpath.c, gxclread.c, gxcmap.c, gxfill.c, gxi12bit.c, gxop1.h, gxpflat.c,
gxstroke.c, gxtype1.c)

Changes some GC procedures from explicit code to standard macros.
(gsstruct.h, gscscie.c, gxcht.c)

For easier debugging, changes gs_debug_c to a procedure; removes
gs_if_debug_c and do_debug.  (gdebug.h, gsht1.c, gsmisc.c, gspaint.c,
gxcht.c, gxht.c, gxpcmap.c)

Changes the num_components member of the color space structure to a
procedure, which is needed because DeviceN color spaces have a variable
number of components; also makes Pattern spaces return -1 - the correct
num_components instead of -1.  This is a NON-BACKWARD-COMPATIBLE CHANGE.
Also adds a base_space procedure.  (gxcspace.h, gscdevn.c, gscolor1.c,
gscolor2.c, gscpixel.c, gscscie.c, gscsepr.c, gscspace.c, gspcolor.c,
gxiinit.c, gxiscale.c)

Changes all groups of statistic-gathering variables to be structure
variables named stats_*.  (gxclip.c, gxclist.c, gxclpath.c, gxfill.c,
gxifast.c)

Starts to pull apart gs_makebitmap/pixmappattern to remove the dependency on
masked images.  (gspcolor.c)

Splits the C heap allocator from generic allocator support.  (gsmemory.c,
gsmalloc.c)

Removes all uses of far_data other than references to device (but not
device2) prototypes.  (gdevmem.h, gdevmrop.h, gxdevcli.h, gconf.c,
gdevabuf.c, gdevht.c, gdevm*.c, gdevmpla.c, gdevmrop.c, gdevnfwd.c,
gsbittab.c, gsflip.c, gsroptab.c, gxcht.c)

Adds a streams member to gs_ref_memory_t.  The library doesn't use this, but
it greatly simplifies the interpreter's bookkeeping.  (gsalloc.h, gxalloc.h,
gsalloc.c)

Adds some more opaque types to the graphics state structure, rather than
using naked struct types.  (gsccolor.h, gzstate.h)

Introduces the notion of the "effective clip path" in a graphics state.
Painting operators should now call gx_effective_clip_path rather than using
the clip_path member directly.  (gxpath.h, gschar.c, gsdps1.c, gsimage.c,
gspaint.c, gspath.c, gxccache.c, gxpaint.c)

Implements view clipping.  (gzstate.h, gspath.c, gsstate.c)

Starts to pare down the fit_* macros in gxdevice.h, since some people feel
strongly they are hard to follow, and also adds BEGIN/END wrapping.
(gxdevice.h, gdevabuf.c, gdevmem.c, gxclpath.c)

Refactors the structure definition macros in anticipation of moving to a
more table-driven approach.  Replaces ENUM_CALL, ENUM_RETURN_CALL, and
RELOC_CALL with ENUM_USING and RELOC_USING.  (gsstruct.h, gdevmem.c,
gshtscr.c, gxcpath.c, gxiinit.c)

Sketches a table-driven rather than procedural representation for GC
descriptors.  We believe this will improve readability, reduce code size,
and perhaps reduce cache thrashing during garbage collection.  This requires
a NON-BACKWARD-COMPATIBLE CHANGE to the enum_ptrs, reloc_ptrs, and
clear_marks procedures (to add the structure descriptor as a parameter).
This should not affect any ordinary clients, because they should already
define these procedures using the macros in gsstruct.h, which *are*
backward-compatible; however, they do affect two internal clients that use
their own type tags with unions (color spaces and device colors).
(gsstrtab.h, gsstruct.h, gsalloc.c, gsstrtab.c)

Updates color spaces for the change in enum_ptrs and reloc_ptrs.
(gxcspace.h, gscdevn.c, gscolor1.c, gscolor2.c, gscpixel.c, gscscie.c,
gscsepr.c, gscspace.c, gspcolor.c)

Updates device colors for the change in enum_ptrs and reloc_ptrs.
(gsdcolor.h, gxdcolor.h, gxpcolor.h, gspcolor.c, gxcht.c, gxcmap.c,
gxdcolor.c, gxht.c, gxp1fill.c)

Implements a hit detection device at the library level.  (gserrors.h,
gdevhit.c)

Changes some configuration parameters from #defines to statics.  (gschar.c)

Changes "simple" structures so they no longer have 0 for the enum_ptrs or
reloc_ptrs procedure.  This is a NON-BACKWARD-COMPATIBLE CHANGE for
structure-definers that don't use the macros in gsstruct.h (of which there
shouldn't be any).  (gsstruct.h, gsalloc.c)

Adds the structure type name to the debugging printout for freeing objects.
(gsalloc.c)

To help in debugging, changes all uses of
	#define ss ((stream_xxx_state *)st)
to
	stream_xxx_state * const ss = (stream_xxx_state *)st;
(gxclread.c)

Removes all uses of 'near' from the library: if short and long calls have
different formats, we rely on the compiler to generate the most efficient
one.  (gscie.c, gscoord.c, gsimpath.c, gsstate.c, gstype2.c, gxclpath.c,
gxclread.c, gxfill.c, gxhint1.c, gxhint2.c, gxhint3.c, gxstroke.c)

Adds 'inline' to stdpre.h, defined as the empty string on compilers other
than the ones we know accept it.  (stdpre.h)

Adds printout of the subrectangle to ImageType 1 tracing.  (gxiinit.c)

Replaces a few uses of gs_memory_default with dev->memory.  (gdevdbit.c,
gxclread.c)

Improves support for halftone objects not associated with graphics states.
This involves a minor change to the definitions of gs_spot_halftone and
gs_threshold_halftone, to define the transfer function as a closure.  This
is slightly NON-BACKWARD-COMPATIBLE in that it requires clients to set
transfer_closure.proc to 0 if they also set transfer to 0.  NOTE: the API
defined in gshtx.h is subject to future change.  (gscsepnm.h, gshtx.h,
gxdht.h, gxfmap.h, gxht.h, gxtmap.h, gscolor.c, gsht.c, gsht1.c, gshtx.c)

Changes the Bezier approximation of arcs to cut arcs at absolute multiples
of 90 degrees rather than at intervals of 90 degrees (e.g., an arc from 45
to 105 would now be cut at 90 rather than being treated as a single
60-degree curve) in order to produce more uniform output and also to ensure
that the bounding box for arcs is more accurate (to pacify the Genoa FTS).
(gxfarith.h, gsmisc.c, gspath1.c)

Replaces all remaining uses of do { ... } while (0) with BEGIN ... END.
(gsbitops.h, gsdsrc.h, gserror.h, gsmdebug.h, gsrect.h, gxcldev.h, gxfunc.h,
gxop1.h, gxtype1.h, gsalphac.c, gsshade.c, gstype2.c, gstype42.c,
gxclread.c, gxcpath.c, gximage4.c, gxpath.c)

Adds a user-defined halftone type, to support non-monotonic halftones.  We
could make any of the following structures fully object-oriented:
	- Halftones (client level)
	- Halftone orders (device level, but not rendered)
	- Device halftones (device level, fully rendered)
The right place to do this for non-monotonic halftones, which are specified
directly by bit masks, is at the device halftone level.  However, there are
too many places that know too much about the implementation of device
halftones and halftone orders right now.  WE NEED TO REVISIT THIS AFTER THE
5.1x CODE BRANCH IS TERMINATED.  SHOULD ALSO CONVERT UNION TO TYPED UNION
FOR GC -- CODE IS DUPLICATED IN gsht.c VS gshtx.c.  (gxdht.h, gxht.h,
gxhttype.h, gshtx.h, gsht.c, gsht1.c, gshtx.c)

Moves the procedures in Type 1 font data into a structure.  This is a
NON-BACKWARD-COMPATIBLE CHANGE, but an internal one.  (gxfont1.h, gstype1.c,
gstype2.c, gxtype1.c)

Extends Type 1 / 2 / 4 fonts to require that they be able to enumerate the
set of glyphs that they define, to allow writing them out.  We may propagate
this to all base fonts in the future.  (gxfont1.h)

Provides some utilities for devices that want to define their own
InputAttributes and OutputAttributes.  (gdevprn.h, gxdevice.h, gdevprn.c,
gsdparam.c)

Removes all of the text-display procedures that took null-terminated C
strings as operands.  This is NON-BACKWARD-COMPATIBLE.  However, since the
memory manager required that all such operands be allocated using
gs_alloc_string, the procedures were never usable with arbitrary C strings
anyway.  (gschar.h, gschar.c)

Renames the gx_device procedure record from std_procs to procs, in
anticipation of more unified support for "objects".  This is a
NON-BACKWARD-COMPATIBLE CHANGE for a surprisingly large number of clients
that should have been using dev_proc and set_dev_proc.  (gdevbbox.h,
gxdevcli.h, gxdevice.h, gdevdflt.c, gdevdgbr.c, gdevmem.c, gdevprn.c,
gsalphac.c, gsdevice.c, gsropc.c, gxccache.c, gxifast.c)

Disallows setting of the RasterOp-related graphics state parameters when
a cache device is active.  (gsrop.c)

Changes the tracing printout of path segments to provide enough accuracy to
cover all the fraction bits of a 'fixed'.  (gxpath.c)





Version 5.23 (limited) (5/14/98)


This fileset adds a number of PostScript LanguageLevel 3 features: library
support for ImageType 3 and 4 (masked) images, PostScript-level support for
ImageType 4, and the shfill operator for smooth shading.  It also adds RCS
$Id$ lines to all the files we maintain.  It also changes the Unix makefiles
so that they create debugging or profiling binaries in separate directories.

This fileset includes an unusually large number of non-backward-compatible
API changes.  Most of them don't affect ordinary library clients, but a few
do.  These changes, and a few more to come, result from the next (large)
increment in our ongoing project to make the code completely re-entrant (no
non-idempotent writable globals in our own code).  This necessarily involves
putting some things that used to be global into structures, some of which
must be added to some interfaces.

NOTE: because of a combination of hardware problems, time pressure, and
belated discovery of sloppiness by the original developers of the PC
makefiles, none of the PC makefiles in this fileset work.  The Borland
makefiles probably come the closest.


Documentation


Adds documentation for:
	- The changes in begin_image and related facilities.  (drivers.txt)
	- The addition of -Z/.  (use.txt)
	- The new ps2ps utility.  (ps2ps.1)
	- The new get_hardware_params procedure.  (drivers.txt)
	- The new -B<size> / -B- switch.  (use.txt).

Improves the documentation for the sample_ macros.  (gsbitops.h)

Adds some documentation on how the debugging/tracing flags work.  (gdebug.h)

Improves the documentation of DDAs.  (gxdda.h)

Documents a subtle change in the meaning of a flag in the PDF
FontDescriptor.  (pdf_font.ps)

Changes the location of the authoritative site for zlib sources.  (zlib.mak)

Corrects a typo.  (gsht1.h)

Removes pdf_2ps.ps from the fileset.  (psfiles.txt)

Adds standard file name comments to all .c and .h files that didn't already
have them.  (dodebug.h, gdev3b1.c, gdev8510.c, gdevadmp.c, gdevhl7x.c,
gdevimgn.c, gdevo182.c, gdevpdfx.h, gdevpe.c gdevsco.c, gdevsj48.c,
gdevvglb.c, gsalpha.c, gscolor1.c, gscsepr.h, gsdsc.c, scfetab.c string_.h,
zfunc3.c, zmedia2.c)

Unifies the nroff styles of the various man pages a bit.  (*.1)

Adds a reference to the CTAN mirror sites.  (new-user.txt)

Notes that the result of rect_intersect may be anomalous.  (gsrect.h)

Improves the documentation for the Distiller parameter handling code.
(gdevpdfp.c, gdevpsdp.c)

Corrects an ambiguity in the definition of the int_keys argument of
param_begin_xmit_dict.  (gsparam.h)

Adds a new file that will evolve into a reasonable guide to the source code.
(README, source.txt)

Adds the convention for 'status' and 'code' to the C style guide.
(c-style.txt)

Improves the documentation for the '-' pseudo-switch.  (use.txt)

Updates the problem reporting form to include the URL for known post-release
problems.  (bug-form.txt)

Documents the availability of sources and binaries for Plan 9.
(new-user.txt)


Procedures


Fixes bugs:
	- The 'tags' target in the Unix makefiles had an incorrect directory
name.  (bug probably introduced since 5.20)  (unix-end.mak)
	- The ld_tr and CCFLAGS macros were used in the makefiles before
they were defined, causing problems with `make' implementations that
substitute macros into definitions at definition time rather than at use
time.  (*.mak)
	- Recent Digital Unix versions (4.0 and later) require -std1 when
compiling.  (make.txt)
	- The Unix library-only makefile had gotten out of date.
(ugcclib.mak)
	- pf2afm[.bat] were omitted from the fileset.  (master/package.tcl)
	- The Borland makefile didn't work, because the Borland compiler
requires specifying the output file name (-o) before the input file name
(-c)!  This required changing the order of every compilation command in
every platform-independent makefile.  The win*.mak files still need work.
(*.mak)
	- None of the non-Unix makefiles specified directory names for the
auxiliary programs.  (dvx-tail.mak, os2.mak, wctail.mak, winlib.mak)
	- The Windows makefiles lacked build rules for gp_ntfs and gp_win32.
(msvclib.mak, winlib.mak)

Adds a new debugging switch -Z/ that prints the file name and line number on
all trace messages.  (gdebug.h, std.h)

Changes the Unix 'pg' and 'debug' build targets so that they create the
binaries in a 'pgobj' or 'debugobj' subdirectory of the standard build
directory.  This allows keeping all 3 configurations active.  (unix-end.mak)

Adds GEN directories for jpeg, libpng, and zlib.  (devs.mak, gs.mak,
jpeg.mak, lib.mak, libpng.mak, zlib.mak)

Adds a gendev.c that will eventually replace genconf.c.  (gendev.c, *.mak)

Adds -Wcast-align to the gcc compilation switches.  (unix-gcc.mak)

Adds support for libpng 1.0.1.  (libpng.mak)

Notes the use of -R on Solaris and other SVR4 systems.  (unix*.mak)

Removes pdf_2ps.ps from the fileset.  (int.mak, unixinst.mak,
pdf_2ps.ps[deleted])

Ensures that every file that is copyright, maintained, and distributed by
Aladdin Enterprises has a RCS $Id$ line (actually, $Id: <filename> $).  In
.c and .h files, these lines currently are only comments, but they could be
converted easily to static strings later if we want to.  We had to touch
almost every file in the fileset to do this, but we did *not* change the
write dates.  (*)

Makes the build procedure auto-detect whether the installed version of gcc
has the 'const' code generation bug.  (gs.mak, lib.mak, unix-gcc.mak)

Removes 'makefile' as a precondition for ccf32.tr.  (I can't quite figure
out why it was there in the first place.)  (msvccom.mak)

Replaces the -F<file> switch with a -B<buffer size> switch that forces all
files to use the run_string interfaces.  -B- turns it off.  (iminst.h,
imainarg.c)

Adds a new resource to genconf.c, -replace <module>.  This causes <module>
*not* to be included if the module with the -replace resource *is* included.
If two modules -replace each other, either directly or indirectly through
-includes, the result is undefined.  (genconf.c)

Uses -replace to implement a default roplib package.  (lib.mak)


Utilities


Fixes bugs:
	- unprot.ps stopped working because of the stricter prohibition
against storing local-VM objects into systemdict.  (unprot.ps)

Adds a new ps2ps utility, like pdf2ps, that "distills" PostScript.
(ps2ps, ps2ps.bat)

Modifies the ps2epsi utility so it can be run outside the ps2epsi script for
testing.  (ps2epsi.ps)

Changes the pdf2ps utility to use the pswrite device.  This gets rid of all
conversion problems, at the expense of larger and stupider output files.
(pdf2ps, pdf2ps.bat)


Drivers


Fixes bugs:
	- Two procedures were declared 'private' inconsistently (thank you
again, gcc).  (gdevps.c)
	- The author of the uniprint driver sent a fix for an
allocation-related bug and an off-by-one bug.  (gdevupd.c)
	- The PDF writer incorrectly converted open stroked rectangles (only
3 sides drawn) to closed (4 sides drawn).  (gxpath.h, gzpath.h, gdevpdfd.c,
gxpath2.c)
	- When banding, filling a character within the PaintProc of a
Pattern could produce memory access errors.  (The problem was in
gx_forward_fill_mask, which might affect filling characters in other
situations as well.)  (gdevnfwd.c)
	- The [e]pswrite driver produced incorrect line widths for stroked
graphics.  (gdevps.c)
	- The [e]pswrite driver didn't invoke colorimage correctly, so
didn't handle Patterns right.  (gdevps.c)
	- Vector devices didn't set the color before writing trapezoids,
possibly causing incorrectly colored output.  (gdevvec.c)
	- Vector devices could give errors on Pattern fills.  (gdevvec.c)
	- The bbox device retained a pointer to the clipping path, which,
since the path was embedded in the gs_state_contents, confused the garbage
collector, causing memory access errors.  We fixed this by de-embedding the
path object: see below.  (gsstate.c)
	- On some Linux systems, the X driver could get a memory access
error when displaying patterns.  We fixed this by adding calls on XInitImage
in the necessary places when running X11R6.  (gdevx.c)
	- PDF output didn't check names for unusual characters, and could
produce invalid output if the input included names with those characters.
(gdevpdfx.h, gdevpdf.c, gdevpdfm.c, gdevpdfo.c)
	- In the PDF writer, DEST pdfmarks with /Dest but no /Page or /View
didn't generate named destinations.  (gdevpdfm.c)
	- Printer devices didn't allow . in %-formats in the output file
name.  (gdevprn.c)
	- The x11cmyk driver didn't read bits back from the screen
correctly.  (gdevxalt.c)
	- The pcxmono and pcxgray drivers used colored rather than
gray-scale palettes.  (gdevpcx.c)
	- The PCX drivers could emit repetition counts greater than 15,
confusing some readers.  (gdevpcx.c)

Removes some vestiges of the obsolete draw_line driver procedure.  We also
rename the draw_line member of the driver procedure structure as
obsolete_draw_line, so that any uses of it will cause compilation errors,
but we don't remove it from the structure, so that existing driver procedure
vectors will continue to compile (although the draw_line procedure will
never be called).  (gxdevcli.h, gdevbbox.c, gdevddrw.c, gdevdflt.c)

To repair a design error, and at the same time add flexibility needed for
ImageType 3:

	- Removes the image_data and end_image driver procedures,
associating them with the gx_image_enum(_common)_t structure instead.
Clients should call gx_device_image_data and gx_device_end_image instead: we
set the image_data and end_image procedures in the device structures to
these procedures when filling in defaulted procedures.  This is a
NON-BACKWARD-COMPATIBLE CHANGE for drivers that implement begin_image, since
they now have to fill the procedures into the enumerator structure.
(gsiparm*.h, gxdevcli.h, gxdevice.h, gxiparam.h, gdevbbox.c, gdevddrw.c,
gdevdflt.c, gdevnfwd.c, gsimage.c, gxclist.c, gxidata.c, gxifast.c,
gxiinit.c, gximage3.c, gximage4.c)

	- Replaces the image_data driver procedure with a plane_data
procedure (now associated with the image enumerator, not the device) that
allows specifying the X offset and raster independently for each plane, and
(depending on the image type) may allow omitting some planes.  We provide a
gx_device_image_plane_data procedure parallel to _image_data and _end_image
(see above).  (gsiparm*.h, gxdevcli.h, gxiparam.h, gdevbbox.c, gdevddrw.c,
gxidata.c, gxiinit.c, gximage3.c, gximage4.c)

Updates clients for image processing changes.  (gdevvec.h, gdevpdf.c,
gdevpdfi.c, gdevps.c, gdevpx.c, gdevvec.c)

Enhances [e]pswrite to detect other kinds of opportunities for producing
smaller output.  This involves a change in the moveto procedure in the
'vector' interface.  (gdevps.c)

Changes the bbox device so that it automatically detects whether it is being
used as a component in a device pipeline or as a free-standing device,
rather than having to select this in the makefile.  (lib.mak, gdevbbox.h,
gdevbbox.c)

Moves the halftoning driver a bit closer to real usability.  (gdevht.h,
gdevht.c)

Adds some tracing to the color mapping code in the X driver.  (gdevx.c)

Implements setting the Dict and ACSDict parameters for pswrite and pdfwrite.
Dict is effective with the CCITTFaxEncode filter for black-and-white images;
otherwise, these parameters still don't do anything.  (gdevpdfi.c,
gdevpsdp.c) ****** READING HUFFMAN TABLES IS NYI, SEE sdcparam.c; SETTING
DOESN'T WORK BECAUSE DCT_set_defaults DOESN'T DO WHAT IT SHOULD ******

Updates the PS/PDF writers to reflect the fact that the ASCIIHexEncode
filter now has a state.  (gdevpsdf.c)

Modifies the X driver so that it can draw multiple platform characters at a
time rather than one character per call.  (gdevx.h, gdevx.c, gdevxxf.c)

Takes advantage of the filter stream procedures now available in stream.c.
(gdevjpeg.c, gdevpdf.c, gdevpsdf.c)

Adds a get_hardware_params procedure, similar to get_params except that it
reads parameters whose values depend on hardware state that may change
without program intervention (e.g., panel switches).  The default is that
there are no hardware parameters.  (gdevmem.h, gdevprn.h, gsdevice.h,
gxdevcli.h, gxdevice.h, gxacpath.c, gxclip2.c, gxclipm.c, gxclist.c,
gxcpath.c, gdevbbox.c, gdevdflt.c, gdevht.c, gdevmrop.c, gdevnfwd.c,
gdevprn.c, gsdparam.c)

Updates the PS/PDF writer for the change in the parameter list API.
(gdevpsdf.c)

Makes a few more writable statics const.  (gdevos2p.c, gdevpipe.c,
gdevpsim.c, gdevx.c)

Removes the rrgb sample device, since it now no longer serves any purpose.
(gdevrrgb.c[deleted])

Converts some additional devices to -dev2, to make them const.  (devs.mak,
gdevbit.c, gdevpbm.c, gdevpcx.c, gdevpsim.c, gdevpng.c, gdevtfax.c,
gdevtfnx.c, gdevx.c, gdevxalt.c)

Updates a client accessing the preallocated color spaces.  (gdevpsdi.c)

Renames the debugging-related statics in the X driver as X_SOMETHING.
(gdevx.c)


Platforms


Makes a few minor changes to support Plan 9.  (make.txt, devs.mak, stat_.h,
stdio_.h, time_.h, gdevpbm.c)


Fonts


Documents the availability of a free Chinese font.  (fonts.txt,
new-user.txt)

Works around a bug in the Adobe PostScript driver.  We though it just output
the FontBBox for Type 42 fonts in the 2048- or 4096-unit character space
rather than a 1-unit space, but in fact it outputs garbage.  (zfont42.c,
gstype42.c)

Augments the handling of Type 42 fonts to recognize the gdir /
GlyphDirectory method of outline definition in addition to the loca / glyf
method, per Adobe versions 2015 and later (undocumented!).  (ifont.h,
zfont42.c)


Interpreter


Fixes bugs:
	- Memory management for argument strings was wrong.  (gsargs.h,
gsargs.c)
	- 1 .setlanguagelevel was broken, because it didn't allow for the
possibility that values could get deleted from systemdict that existed in
level2dict.  (bug introduced in 5.x, x <= 10) (zmisc2.c)
	- -dFAKEFONTS was broken.  (gs_fonts.ps, gs_init.ps)
	- copyscanlines was broken.  (bug introduced in 5.20) (gs_init.ps)
	- The matrix returned by sizeimage was incorrect.  (zdpnext.c)
	- The implementation of .buildpattern for PatternType 2 was wrong.
(gs_ll3.ps)
	- Ghostscript couldn't load TrueType fonts where the amount of data
either before or after the glyf section exceeds 64K.  (gs_ttf.ps) ****** WE
BACKED OUT THIS CHANGE, BECAUSE WE HAD TO BACK OUT THE NEXT ONE. ******
	- Ghostscript couldn't load TrueType fonts where the total data is
more than 64K and the offset or length of the glyfs is odd.  (gs_ttf.ps)
****** WE BACKED OUT THIS CHANGE: IT BROKE THE PDF INTERPRETER, BECAUSE IT
IMPOSES A NEW REQUIREMENT THAT TTF FILES BE POSITIONABLE. ******
	- Some compilers complained about arithmetic on enums.  (interp.c)
	- The CIE color space and CRD GC structure definitions were in the
interpreter rather than the library.  (zcie.c, zcrd.c)
	- NullFont was still present in FontDirectory when currentglobal was
false.  (gs_init.ps)
	- execform failed with Form resources, because it tried to insert
the Implementation in a read-only dictionary.  (gs_fform.ps, gs_lev2.ps)

Finishes implementing ImageType 4 images, and moves closer to implementing
ImageType 3.  (iimage.h, zdps.c, zimage.c, zimage2.c, zimage3.c)

Updates tracing output to use the new dlprintf macros.  (idict.c, igc.c,
igcref.c, igcstr.c, iname.c, interp.c, isave.c, iscan.c, zcie.c, zcontext.c)

Implements multiproc=true for readimage.  (gs_dpnxt.ps)

Does a bit more work on implementing shading with PatternType 2.
(gs_ll3.ps, zfunc.c, zshade.c)

Adds a .bitadd operator for adding integers modulo the word size.
(zarith.c)

Updates filter operators to use the new stream parameter facility.
(iparam.h, iparam.c, zfdecode.c, zfdctc.c[deleted], zfdctd.c, zfdcte.c)

Updates the implementation of parameter lists for the change from _dict to
_collection.  (iparam.c, iparam.h)

Takes advantage of the filter stream procedures now available in stream.c.
(zfilter.c)

Adds get_hardware_params to one device procedure vector.  (zupath.c)

Adds .gethardwareparams to parallel .getdeviceparams.  (zdevice.c)

Updates the interpreter's parameter list machinery to match the change in
gsparam.h.  (iparam.h, iparam.c)

Makes more writable statics const.  (gs_init.ps, btoken.h, dstack.h, iref.h,
opextern.h, icontext.c, idict.c, igc.c, igcref.c, iinit.c, imainarg.c,
interp.c, iscanbin.c, iutil.c, zbseq.c, zcie.c, zcontrol.c, zdevcal.c,
zdevice2.c, zdps.c, zdps1.c, zfont2.c, zgeneric.c, zgstate.c, ziodev.c,
ziodev2.c, ztype.c)

Removes an inappropriate reference to PROGRAM_NAME.  (imainarg.c)

Removes set/currentrenderalgorithm, since they are useless for the purpose
for which they were intended.  (zrop.c)

Uncomments code for CIEBasedDEF[G] color spaces, even though these aren't
fully implemented yet.  (zcie.c)

Reimplements StartJobPassword and SystemParamsPassword as no-access strings
in systemdict.  (gs_lev2.ps, iutil2.h, iutil2.c, ziodev2.c, zusparam.c)

Splits off the context state record from icontext.h, so that places that
only need access to state variables don't need to import the
procedures. (icontext.h, icstate.h)

Updates a client for the change in gs_malloc_limit.  (imainarg.c)

Updates clients for the change in the accessors for predefined color spaces.
(zcolor1.c, zimage.c, zimage2.c)

Renames the (few) debugging-related statics as I_SOMETHING.  (igc.c)

Splits off idstack.h (API for dictionary stacks) from dstack.h (API for the
interpreter's dictionary stack), and idstack.c (dictionary stack
implementation) from idict.c (dictionary implementation).  We should have
done this a long time ago!  (dstack.h, idictdef.h, idstack.h, idict.c,
idstack.c, iinit.c, ireclaim.c)

Folds the cached currentfile pointer into the exec-stack structure.
(estack.h, interp.c)

Changes clients of gs_register_*_root to eliminate statically allocated
roots.  (iinit.c, iname.c, interp.c, zbseq.c, zcontext.c, zfile.c, zfont.c,
zfont2.c, zgstate.c, ziodev.c)

Adds a ref_free_stack procedure, and reformats the implementation of stacks.
(istack.h, interp.c, istack.c)


Interpreter (PDF)


Fixes bugs:
	- Pattern colors sometimes caused errors.  (gs_pdf.ps)
	- A file ending with %%EOF without an EOL caused an error.
(pdf_main.ps)
	- Fl wasn't recognized as an abbreviation for FlateDecode in in-line
images.  (pdf_draw.ps)

Removes all code related to converting PDF to PS: it never worked reliably,
and we now support this function with the pswrite device instead.
(gs_pdf.ps