history3.txt

遗传算法工具箱 希望高手指点 GATOOLS

CCITTFaxEncode filter code). (gdevtfax.c)
	- tiffpack, to produce output in TIFF PackBits format. (gdevtfax.c)

Interpreter (PostScript)
------------------------

Fixes bugs:
	- If the current screen was set with a halftone, setcolorscreen
wouldn't accept what currentcolorscreen returned.  (gs_dps1.ps)
	- debug_print_full_ref didn't print t_oparray objects correctly.
(idebug.c)
	- The internal data for a font could be allocated in a different VM
space from the font dictionary, causing dangling pointers.  (zfont2.c)
	- definefont became confused if a program failed to delete the FID
from a re-encoded font.  (This is questionable PostScript, but dvips does
it.)  (zfont2.c)
	- If a BuildChar procedure did a save before the setcachedevice and
a restore afterwards, the memory manager would attempt to free the cache
device after it had already been freed by the restore, leading to damaged
freelists.  (gschar.c)
	- setresolution (in statusdict) was ignored.  (gs_lev2.ps,
gs_statd.ps)
	- If a string containing a string containing a \ was passed to the
token operator, the \ was not recognized properly in a Level 2 environment.
(iscan.c)
	- A couple of default dictionary sizes had become too small.
(iinit.c)

Makes DOS EOF (control-Z, 0x1a) a self-delimiting token, like left bracket.
THIS IS A NON-BACKWARD-COMPATIBLE CHANGE, but it should not have any adverse
effects.  (gs_init.ps, iscan.c, iscantab.c)

Distinguishes arch_small_memory from arch_ints_are_short, and adds a new
-Z. switch to force small-memory table sizes regardless of actual memory
size.  (dstack.h, idict.c, zpcolor.c, zvmem2.c)

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

Fixes bugs:
	- A page with no Contents caused an error.  (pdf_main.ps)
	- Executing a Form resource caused an error.  (pdf_draw.ps)
	- Outlines with open entries caused an error.  (pdf_main.ps)
	- Embedded Type 3 fonts caused an error.  (pdf_draw.ps, pdf_font.ps)
	- The Widths array of fonts was ignored.  (pdf_font.ps)

Library
-------

Fixes bugs:
	- Freeing an entry in the pattern cache didn't clear the pointers to
the raster data, producing a dangling reference that confused the garbage
collector.  (gxpcmap.c)
	- The test on FORCE_HINTS_TO_BIG_PIXELS was backwards.  (gstype1.c)
	- The pattern cache bookkeeping was incorrect.  (gxpcmap.c)
	- Depending on the order in which pointers were relocated, the
garbage collector could incorrectly relocate pointers from the character
cache.  (gxfcache.h, gsfont.c, gxccache.c, gxccman.c)

Changes the fast case of black-and-white images so it aligns scaled images
with the device coordinate system, to improve performance.  (gsimage1.c)

Extends the coordinate transformation routines to handle absurdly large
translation values in the CTM as long as the final device device coordinates
are within fixed-point range.  (gxmatrix.h, gxpath.h, gschar.c, gscoord.c,
gsmatrix.c, gxhint2.c, gxpath2.c)

Distinguishes arch_small_memory from arch_ints_are_short, and adds a new
-Z. switch to force small-memory table sizes regardless of actual memory
size.  (gdevprn.h, gxpcolor.h, gzht.h, std.h, gsfont.c, gsht1.c, gspaint.c,
gsstate.c, gxcht.c, gxht.c, gxpcmap.c)

Version 3.29(internal) (3/8/95)
======================

Another bug-fix release.  This release processes all but 7 of the 500+ files
on the Adobe Acrobat Sampler CD-ROM without giving an error.  The garbage
collector finally appears to be stable.  This version was created for a
customer; it was not released to the general public or even to the beta test
list.

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

Documents the possible need to set LD_RUN_PATH on SVR4 platforms.
(make.doc)

Expands the description of the device life cycle, and of the constraints on
put_params procedures.  (drivers.doc)

Adds an explicit copyright notice to the Aladdin Ghostscript Free Public
License.  (PUBLIC)

Clarifies that the Win32s documentation also applies to Windows NT.
(make.doc)

Procedures
----------

Removes the obsolete writeppmfile operator from the standard configurations.
(gs.mak)

Changes the Watcom makefiles to work properly with Watcom C/C++ 10.0.
(make.doc, msc.mak, watc.mak, watcwin.mak, wccommon.mak)

Utilities
---------

Adds a wftopfa utility for converting the Wadalab fonts to usable Type 0 and
Type 1 form.  (wftopfa)

Fonts
-----

Fixes bugs:
	- Entries added automatically by definefont (FontInfo, ExactSize)
could cause a font dictionary to become full.  (gs_fonts.ps, gs_type1.ps)
	- wrfont.ps couldn't deal with very long CharStrings.  (wrfont.ps)

Makes the name of the Fontmap file an easily editable parameter.
(gs_fonts.ps)

Adds a utility for converting the Wadalab font to usable Type 0 and Type 1
form.  (wrfont.ps, wftopfa.ps)

Drivers
-------

Fixes bugs:
	- The top margin for printer (and fax) devices was computed
incorrectly, using the X resolution rather than the Y resolution.
(gdevprn.h)
	- Changing the page size or resolution of a printer device closed
and reopened the device unnecessarily.  (gdevprn.c)
	- Changing the page size of the X11 device didn't change the initial
matrix, so (0,0) didn't wind up in the lower left corner.  (gdevx.c)
	- The bit devices didn't allow changing the number of bits per
pixel.  (gdevbit.c)

Adds a settable .IsPageDevice boolean device parameter to the X Windows
driver.  The default value is true.  (gdevx.h, gdevx.c)

Changes the PPM driver so that it chooses between PBM/PGM/PPM on a
page-by-page basis, rather retaining the most general format ever required
by any page.  (gdevpbm.c)

Interpreter (PostScript)
------------------------

Fixes bugs:
	- The current page device could be null, rather than an empty
dictionary.  (igstate.h, zchar.c, zdevice.c, zdevice2.c, zgstate.c)
	- The scanner didn't signal an error for names or strings that were
too long.  (iscan.c)
	- A missing header file upset the VAX compilers.  (ztype.c)
	- Some places expecting dictionary operands didn't check the type,
because they incorrectly assumed that the dict_check_read/write macro did
this.  (idict.h, zdevice2.c, zht2.c, zmisc2.c)
	- The definition of quit in systemdict wasn't disabled within
encapsulated jobs.  (gs_lev2.ps)
	- resetfile gave an error if the file was closed, rather than doing
nothing.  (zfileio.c)
	- The scanner attempted to free an uninitialized pointer if it
reached EOF after a / or //.  (iscan.c)
	- A restore in a different file than the corresponding save caused
an invalidrestore error.  (gs_init.ps)
	- The default value of EndOfData in RunLengthDecode streams was set
to false.  (zfilter.c)
	- .registerencoding didn't invoke the save machinery correctly,
leading to GC problems.  (zfont2.c)
	- The facility for overriding .printerror didn't work correctly.
(gs_init.ps)
	- gs_run_file_open wasn't public.  (gsmain.c)
	- The interpreter returned e_undefined for undefined error names,
rather than the error code.  (interp.c)
	- Allocation in system memory (specifically, adding a block to a
stack) couldn't trigger automatic garbage collection.  (interp.c, igc.c,
zvmem2.c)
	- A restore in a different invocation of gs_run_string than the
corresponding save would stop reading the string.  (files.h, gsmain.c,
iccinit.c, zfile.c)
	- The Type 1 rasterizer state included a pointer into the middle of
an object, confusing the garbage collector.  (zchar1.c, zfont1.c)
	- When the garbage collector deleted a name, it didn't zero out the
string pointer.  (iname.c)
	- On platforms where obj_align_mod > 4, the memory manager could
access 1 beyond the end of its freelists.  (iastate.h)
	- makefont and scalefont didn't check the type of their font operand
soon enough.  (zfont.c)
	- restore didn't finalize the objects it freed.  (isave.c)
	- restore didn't free system VM.  (isave.c)
	- Freeing a ref array that occupied an entire chunk didn't free the
chunk.  (ialloc.c)

Adds a .runexec operator which implements the 'close if error' function of
run.  (zfile.c, zfileio.c)

Moves the obsolete writeppmfile operator into a separate file.  (zfileio.c,
zwppm.c)

Makes the statistics returned by the memory manager more accurate.
(ialloc.c, zvmem.c)

Adds a (read-only) %Calendar% IODevice.  (zdevcal.c)

Adds a "hook" in the character operators to allow external code to
intervene; this is needed for a customer.  (ichar.h, zchar.c, zchar2.c)

Makes control-D (0x04) a self-delimiting token, like left bracket.  THIS IS
A NON-BACKWARD-COMPATIBLE CHANGE, but it should not have any adverse
effects.  (scanchar.h, iscan.c, iscantab.c)

Changes the error stack printout so that it puts line breaks between items
iff the items are being printed with ==.  (gs_init.ps)

Uses finalization to close streams being freed.  (igc.c, zfile.c, ziodev.c)

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

Fixes bugs:
	- Embedded Type 1 fonts that invoked save and restore while being
read caused an error.  (pdf_font.ps)
	- Large files that referenced a non-alphabetic font for the first
time late in the file could cause an error.  (pdf_main.ps)

Streams
-------

Fixes bugs:
	- SubFileDecode streams didn't copy partial matches of the EOD
string into their output.  (sfilter1.c)

Makes switching between read and write modes a stream procedure.  (stream.h,
sfile.c, sfileno.c, stream.c, zfileio.c)

Makes file streams close themselves when finalized.  (We can't do this for
other streams, because finalization procedures aren't allowed to free
storage explicitly.)  (stream.h, sfile.c, sfileno.c, stream.c)

Library
-------

Fixes bugs:
	- The obsolete files gcdefs.h and gsfile.c were still included in
the fileset.
	- A number of places didn't deal with null patterns properly (p_tile
== 0).  (gxdcolor.h, gspcolor.c, gxpcmap.c)
	- The pattern tiling algorithm was numerically unstable, especially
if the X/YStep vectors were close to the axes.  (gxcolor2.h, gspcolor.c,
gxpcmap.c)
	- setdeviceparams checked the values of read-only byte array
parameters incorrectly.  (gsdparam.c)
	- The statistics macros in gxfill.c didn't use DO_NOTHING when
disabled.  (gxfill.c)
	- Changing the orientation of a device closed and reopened the
device unnecessarily.  (gsdparam.c)
	- ioerrors occurring when writing command lists weren't reported
properly.  (gxclist.h, gxclist.c)
	- Errors from device procedures weren't always propagated up to
clients.  (gsimage1.c, gsimage3.c, gxclip2.c, gxclist.c)
	- Overflowing the fixed-point translation values in the CTM caused a
floating point exception rather than a limitcheck.  (gxmatrix.h, gscoord.c)
	- charpath set the current point correctly, but didn't append a
moveto element to the path.  (This mostly affected Mathematica output.)
(gzpath.h)
	- Image devices mapped colors incorrectly.  (gdevmem.c, gdevm16.c)
	- On devices with color capability but fewer than 4 bits per pixel,
color halftones didn't work (and could cause an arithmetic exception).
(gxdither.c)
	- Black-on-white memory devices didn't map colors properly.
(gdevprn.h, gxdevice.h, gxdevmem.h, gdevmem.c, gdevm1.c, gsdevice.c)
	- Memory devices with a non-zero origin in their initial matrix
clipped the image improperly.  (gsdevice.c)
	- The Type 1 rasterizer state included a pointer into the middle of
an object, confusing the garbage collector.  (gstype1.h, gxfont1.h,
gxtype1.h, gstype1.c, gxhint2.c)
	- The band rasterizer could produce garbled output for images
(including characters) on 64-bit architectures.  (gxclread.c)
	- Bounding boxes (for pathbbox and setbbox) could be slightly
inaccurate.  (gsmatrix.c)
	- On 64-bit architectures, halftone tiles less than 16 bits wide
were handled incorrectly.  (gxclist.c)

Adds an .IsPageDevice boolean device parameter (normally read-only).
(gsdparam.c)

Removes the library code for implementing the obsolete writeppmfile
operator.  (gswppm.c)

Makes the default matrix (for initmatrix and defaultmatrix) a settable
parameter in the graphics state.  (gscoord.h, gzstate.h, gscoord.c,
gsdevice.c, gsdparam.c)

Makes the statistics returned by the memory manager more accurate.
(gsmemory.h)

Adds a compile-time flag to choose whether or not to force Type 1 hints to
"big pixel" boundaries when oversampling.  (gstype1.c)

Changes the .PageCount device parameter back to PageCount, because the
change broke some scripts.  (gsdparam.c)

Adds optimization for 90 degree rotated images with pure colors.
(gximage.h, gsimage.c, gsimage1.c)

Changes the band rasterizer so that replicated halftone tiles are written on
the band list in unreplicated form.  (gsbitops.h, gxcldev.h, gsbitops.c,
gxclist.c, gxclread.c, gxht.c)

Changes the .HWBitsPerPixel device parameter to BitsPerPixel.  (drivers.doc,
language.doc, gdevcdj.c, gdevstc.c, gsdparam.c)

Version 3.28(beta) (2/13/95)
==================

Another bug-fix beta release.  The number of bugs being fixed in each of
these sub-releases does exceed the number of new bugs introduced, but the
latter number is discouragingly high.

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

Adds some information about handling VMS file attributes for files
transferred by FTP.  (use.doc)

Procedures
----------

Fixes bugs:
	- unix-gcc.mak said the static linkage switch for SunOS was -Bstatic
rather than -static.  (unix-gcc.mak)
	- Some dependency lists in gs.mak were out of date.  (gs.mak)

Utilities
---------

Fixes bugs:
	- markhint.ps didn't check for protected fonts.  (markhint.ps)

Drivers
-------

Fixes bugs:
	- The cdj driver had a byte/char agreement problem.  (gdevcdj.c)
	- The cdj driver attempted to initialize a dynamic array.
(gdevcdj.c)

Removes the setting of InputAttributes and OutputAttributes from the H-P
drivers, since this causes more problems than it solves.  (gdevdjet.c)

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

Fixes bugs:
	- makeoperator assigned incorrect attributes to operators. (bug
introduced in 3.27) (opdef.h, iinit.c, iutil.c, zmisc.c)