This file is public domain.
----------------------------------------------------------------------
What is new in MetaPost version 1.208:
----------------------------------------------------------------------
* Previous versions of MetaPost 1.20x were overeager to remove file
extensions from the end of the jobname.
----------------------------------------------------------------------
What is new in MetaPost version 1.207:
----------------------------------------------------------------------
* With the -file-line-error commandline option, MetaPost 1.20x always
reported the name of the most recently 'input' file instead of the
name of the actual current file.
----------------------------------------------------------------------
What is new in MetaPost version 1.206:
----------------------------------------------------------------------
Bug fixes:
* Many of the commands in the MP language cause strings in the string
pool to be printed to new strings that are also built up in the
string pool. This could cause crashes when the new string wouldn't
fit in the memory allocated.
* Failure to initialize the jobname in the MP_options struct could
cause crashes in library mode.
----------------------------------------------------------------------
What is new in MetaPost version 1.205:
----------------------------------------------------------------------
Bug fixes:
* Metapost did not handle well files with extensions other than .mp.
----------------------------------------------------------------------
What is new in MetaPost version 1.204:
----------------------------------------------------------------------
Bug fixes:
* Metapost could go into an endless output loop when characters in
bitmap fonts where used, because it tried to limit the %*Font output
line to a specific number of bytes.
----------------------------------------------------------------------
What is new in MetaPost version 1.203:
----------------------------------------------------------------------
Bug fixes:
* Building version 1.202 for source required X11 headers to be installed.
* Another infinite recursion trap added, now for erroneous vardefs
with suffixes (reported by Nicola Vitacolonna).
* Fix infinite loop recursion on integer overflow (reported by Nicola
Vitacolonna, fix based on a hint from Dan Luecking).
* In version 1.202, setting "job_name" from lua code caused a crash.
* The "filename" field on the lua figure object in 1.202 was just the
extension, instead of the whole file name.
----------------------------------------------------------------------
What is new in MetaPost version 1.202:
----------------------------------------------------------------------
Bug fixes:
* Fix greypart <numeric> (always returned 0).
* Make 'withcolor true' explicitly reset the color model to uninitialized.
* Report which mem file can't be found, and use 'plain' instead of PLAIN
in the mem search warning messages.
* Fix a crash on subsetting of some Type1 fonts because of a temporary
buffer overrun.
* Correct a crash on SVG text output when the 8th bit is set.
* Fix the use (reference) of 8-bit glyphs in SVG mode when prologues:=3.
* Fix the output of text strings that reference the character at index 0.
* Use ".ps" as file extension for negative charcodes (backward compatility).
* Metapost sometimes printed "mp_vacuous" instead of "vacuous".
* Fix rounding of negative scaled and fraction values.
* Restore the error for 'arctime' out-of-bounds.
* Moved the "turningnumber algorithms do not agree" message out of reach
(now only printed if tracingchoices>2 )
* Fix a problem with dash scaling during picture copying.
* TFM header bytes were written out with an offset of one.
* Updated the mptrap files.
----------------------------------------------------------------------
What is new in MetaPost version 1.201:
----------------------------------------------------------------------
Bug fixes:
* There was a bug where sometimes the outer contour of a glyph that was
asked for via 'glyph X of' was missing from te output, depending on
the path drawing order inside the Type1 font.
* Handling of MPTEXPRE label prefix files was broken.
* Font subsetting for 8-bit characters in Type1 fonts was broken.
* The use of "%{outputtemplate}" inside "outputtemplate" now generates
an error.
* The first letter of the input file name was swallowed in the log file.
* There is some rudimentary support for infinite recursion trapping now,
to help prevent segfaults&crashes due to C call stack exhaustion.
* An unlucky change in glibc made compilation fail on new GNU/Linux
systems due to multiple incompatible definitions of 'getline()'.
* There was a bug in the handling of quoted external commands for
MPXCOMMAND | MPXMAINCMD | TEX.
* The main input file's opening brace and filename were not shown in
the log file output.
* Non-colored picture objects (clipping and setbounds paths) are now
ignored when the color part is asked from within "within", for
backward compatibility reasons.
* The trip and trap files are now part of the distribution and the
mptrap files have been updated.
* The standard web2c argv[0] mem file mimicri was broken: 1.200 was
always looking for "mpost.mem" even when called under another name.
* The manual pages for "mpost" and "dvitomp" have been updated, and the
old "mp" manual page has been removed.
* The first letter of any missing input file name was not shown in the
terminal error message.
* Output files are now once again written in the current directory even
if an explicit source directory is given. This includes the creation
of mpx files, but some trickery is used so that up-to-date existing
mpx files from the source directory take precedence.
----------------------------------------------------------------------
What is new in MetaPost version 1.200:
----------------------------------------------------------------------
New features:
* It is now possible to get the actual path drawing routines from a
font glyph. The syntax is :
q := glyph 113 of "cmr10";
q := glyph "one.oldstyle" of "lmr10";
"glyph" is a primary binary operator (like "subpath") that accepts
a string or number and a string, and the result is a picture.
The second argument is a tfm name. This will be combined with
a fontmap entry to find the font's PostScript source file.
If the first argument is a string, then it should be a Charstring
name in the postscript font source. If the first argument is
an integer, it is an index into the encoding of the font, and
the Charstring that is mapped to that index is taken (it follows
that numeric values have to be integers between 0 and 255).
The returned picture can be empty (if the tfm or the pfb or the
encoding or the Charstring was not found), otherwise it consists
of a list of 'fill' objects that use the the 'grey' color model.
Counterclockwise paths receive the grey value matching 'white',
clockwise paths 'black'.
* MetaPost now supports string valued internal variables. Three of
these are predefined ("jobname", "outputformat", "outputtemplate"),
you can add more of them via "newinternal".
newinternal string s;
s := "hello";
The type of a new internal is either 'string' or 'numeric',
and defaults to numeric (this is for backward compatibility with
older versions of MetaPost). String internals are initialized to
the empty string, numeric internals are initialized to zero.
* MetaPost now has a second backend that generates Scalable Vector
Graphics output. This new backend was requested by Dave Crossland, who
also provided the funding to make it possible. Dave, thank you again!
The default value of "outputformat" is "eps"; when you assign "svg"
you will get SVG output.
If you use text labels with SVG, you will probably also want to set
prologues:=3;
With this setting, MetaPost will convert the font into curves
(of course you also need a correct font map line, just as for
PostScript output).
With any other value of "prologues" you will simply get the SVG
default text font in a system-dependant encoding. This is unlikely
to be what you want!
A simple example:
outputformat := "svg";
outputtemplate := "%j-%c.svg";
beginfig(1);
fill fullcircle scaled 100 withcolor .4red;
endfig;
end.
In the lua bindings, there is the new figure method "svg()", that
gives back the SVG output string. This is subtly different from the
direct file output: the lua method does not prepend an XML declaration
(this makes embedded use of the generated XML easier).
* The new internal string variable "outputtemplate" replaces
"filenametemplate". The big difference is that "outputtemplate"
is a true 'internal', so that you need a proper assignment.
On the positive side, this means that you can use its current
value with e.g. show and message.
* "outputtemplate" has a new type of replacement: internal variable
names. Instead of the short "%j.%c", you could write:
outputtemplate := "%{jobname}.%{charcode}" ;
this type of replacement works for all internal variables,
including those defined via "newinternal".
* There are two new numeric internals: "hour" and "minute".
(these are a consequence of the outputtemplate change)
* The primitive "jobname" is now a string internal instead of a
special case. This implies you can assign to "jobname", but
such an assignment will only affect the picture output. The
job name for the purposes of log and mem file names is fixed
permanently at startup time and cannot be altered.
* "mpost" can now pretend to be dvitomp. Either copy the executable
to the name "dvitomp", or pass the switch --dvitomp on the command
line.
* The command line option --halt-on-error has been reinstated.
* There is a new -s<internal>=<value> command line switch that can
be used to setup run time values. Such assignment will be executed
after initialization is complete (i.e. after mem file loading) but
before any other code is executed.
This works for all internal variables, including one defined
that may have been defined in the mem file via "newinternal".
* "tracingstats:=1;" now prints the highest and total input levels.
Bug fixes:
* The turningnumber calculation had a rounding error in the internal
arithmetic that could cause incorrect numbers to be calculated
(typically resulting in a 'turning numbers do not match' error).
* The parsing of command line arguments with options was broken.
* Reading of files with 8-bit names has been fixed.
* A patch by Melissa O'Neill fixes inclusion of some special Type1
formats.
* There was a bug where, when "prologues:=3;", the lists of the
DocumentResources/DocumentSuppliedResources could appear in the eps
output partially uncommented.
* Troff labels were completely broken in all MPlib-based versions.
Other changes:
* Many, many improvements to the manual and the tutorial. Sorry
Stephan, I don't know enough to list them all!
* The old executable build system has been replaced by the new build
system from the TeXLive 2009 repository.
* The MetaPost (and mplib) source code is now released under LGPL
instead of GPL, and uses a derivative of PyAvl instead of GNU libavl.
* The web2c 'mktexfmt' feature is enabled for the program "mpost" once
again.
----------------------------------------------------------------------
What is new in MetaPost version 1.102:
----------------------------------------------------------------------
* Printing of 8-bit string characters has been fixed.
* In previous versions, TFM files and PFB fonts would not be read
properly on big-endian machines (e.g. powerpc)
* The MetaPost distribution now contains "A Beginner's Guide to
MetaPost for Creating High-Quality Graphics" by Troy Henderson
and Stephan Hennig. This tutorial replaces Hobby's mpintro.tex.
----------------------------------------------------------------------
What is new in MetaPost version 1.101:
----------------------------------------------------------------------
This is just a bugfix release. The following bugs / problem areas in
MetaPost 1.100 have been fixed / improved:
* TFM file generation was completely broken.
* The job name discovery on the commandline has been improved.
* Under some (rare) conditions MetaPost forgot to create a log file.
* Labels containing char0 were exported to PostScript incorrectly.
* On Windows, the DVI file that is the result from the internal call
to TeX for btex .. etex lables was not deleted automatically.
----------------------------------------------------------------------
What is new in MetaPost version 1.100:
----------------------------------------------------------------------
CHANGES compared to the previous release, 1.005:
* This version is based on MPlib, the C conversion of MetaPost.
The one user-visible change is that the btex ... etex
label conversion is now handled internally instead of via
the external "mpware" programs. These programs are therefore
no longer distributed.
* There is a new manual, mplibapi.pdf, that describes the internal
interface to MPlib.
* The file 'mpintro' is no longer distributed because it is
obsolete (it has been that way for some time).
* The distribution now includes Dan Luecking's mpsproof.tex.
CHANGES compared to the previous beta, 1.091:
* The DVI -> mpx converter was bugged when virtual fonts were used.
* MP could crash when a string was added to the string pool that
was too large to fit.
* The string pool compaction routine was called much too often, thus
preventing unnecessary slowdowns.
* Various problems with uninitialized option settings and missing mem
files or pfb files have been fixed.
* There was a line buffer overrun possible in the file reader.
* mpost now honours --recorder and --file-line-error.
* MP now accepts file names with paths (separator is /) and with
embedded spaces (using " for quoting)
* There could be empty lines in the PS output.
* Full 8-bit fonts (i.e. font using character slot 255) could create
an eternal loop.
* The handling of equations with addition or substractions between two
unknowns in the right hand side was wrong.
* The first line of the PS font encoding output could be broken
inbetween a glyph name and its preceding slash.
* Font inclusion in the PS backend would fail for all fonts that had
glyph ids using the 8th bit.
----------------------------------------------------------------------
What is new in MetaPost beta version 1.091:
----------------------------------------------------------------------
* Dash lists were interfaced incorrectly by the lua bindings.
* The Type 1 Font inclusion in the previous version produced invalid
subsets.
* The configure script now also checks for sys/time.h
* The error message you get for invalid mem files now mentions the
name of the file as well as the nature of the problem.
----------------------------------------------------------------------
What is new in MetaPost beta version 1.090:
----------------------------------------------------------------------
This MetaPost release is based on MPlib. For those of you who are not
aware of the MPlib project yet:
MPlib is the name of the new, revamped version of the MetaPost
interpreter. It is implemented in Cweb, and internally consists
of a core library, an mpx generation library, and a frontend
driver program (mpost).
There are no changes to the MetaPost language, but nevertheless there
are some minor differences with the last pascal-web based version of
MetaPost (1.005):
* The MPlib distribution is released under the GPL version 2 or,
at your option, any later version.
* The commandline is slightly different, run mpost --help for details.
* The mem file format is changed, you have to regenerate any
existing ones.
* The new mpx generation library includes the label generation
functionality that was previously provided by 'makempx', and
this internal code will be used instead of an external program.
That is, unless the MPXCOMMAND variable is set in the environment
or texmf.cnf. The 'mpware' programs became obsolete and are no
longer included in the distribution.
* Most of the memory configuration variables from texmf.cnf
have become obsolete due to dynamic reallocation. The four remaining
ones are 'main_memory', 'hash_size', 'max_in_open', 'param_size'.
These are only taken into account at mem generation time, the
values are stored in and reloaded from the mem file.
* The core MPlib library does not interpret an initial '&' as anything
special and it does not support re-initialization using a different
mem file either. The command line program mpost _does_ interpret '&'
as an alias for the -mem switch to preserve (some) compatility.
* The MPlib distribution includes lua script language bindings.
Following are the NEWS items for the previous beta releases of MPlib.
----------------------------------------------------------------------
What is new in the beta release of MPlib 1.090:
----------------------------------------------------------------------
* The lua bindings to MPlib are added to the distribution, and
build.sh can now build an mplib.so loadable module for lua
(this needs an installed lua 5.1 distribution)
* Some internal macros are renamed so that the exported C structure
fields could have better names, and a new document (mplibapi.tex)
provides the documentation of the C api and Lua bindings.
* The texmf and manual trees are now included again.
* (un)dumping mem files is delegated to a separate cweb source file.
* All gcc-isms in the build and configure scripts have been removed.
* The kpathsea library is updated.
----------------------------------------------------------------------
What is new in the beta release of MPlib 1.085:
----------------------------------------------------------------------
* Determination of the mem name to use in non-ini mode is now much
closer to the web2c approach.
* There is now a magic word in the beginning of the mem file to make
sure it is written by the correct version of MPlib.
* Fixed the disappearing comment sign in the to-be-typeset document
created by the mpx generation subsystem.
* Various identifiers have been renamed to avoid clashes (that prevented
the source from building correctly on many platforms)
* A great many small changes and fixes have been added after running
splint on the generated C source.
----------------------------------------------------------------------
What is new in the beta release of MPlib 1.080:
----------------------------------------------------------------------
* The MPlib distribution is released under the GPL version 2 or, at
your option, any later version. The copyright statements in the source
files have been updated to reflect this.
* The mpost program banner now contains the kpathsea version, and no
longer mentions the fact that the source is now cweb at all.
* The mpost program once again supports 'E' error responses.
* There are some minor internal API changes, but there is still no
documentation for the API, so that is not very interesting yet.
----------------------------------------------------------------------
What is new in the beta release of MPlib 1.060:
----------------------------------------------------------------------
* The MPlib distribution is released under the GPL version 2.
* This release is the first that replaces the old metapost distribution
completely. The executable is now named 'mpost' with engine name
'metapost'.
* The release now includes a cweb implementation of the makempx
functionality that is linked into the mpost executable.
This internal code will be used unless the MPXCOMMAND variable is set.
Because of this functionality, the mpware directory is no longer
included and the standalone programs 'makempx', 'newer', 'mpto',
'dvitomp' and 'dmp'. are no longer maintained.
* This is the first development release of the new cycle, and contains
all of the functionality of Metapost 1.005. The mpost version is now
1.060, and the special version number for the cweb version has been
removed from the banner.
----------------------------------------------------------------------
What is new in the alpha release of MPlib (0.20.0):
----------------------------------------------------------------------
* Two bugs in MP 1.002 were fixed by Giuseppe Bilotta, both fixes
are about polygonals pens and will be included in the upcoming
MP 1.003 release also.
* It is now possible to ask for the envelope of a path drawn as
traced by a (non-elliptical) pen:
path p,q;
p = fullcircle scaled 30;
q = envelope pensquare of p;
* There is a lua interface now, and it is already used by luatex.
To play with this, currently the best solution is to fetch the
0.25.0 beta of luatex: http://foundry.supelec.fr/projects/luatex
This embeds MPlib 0.25.0 as well as its documentation.
* Many bugs were fixed.
----------------------------------------------------------------------
What is new in the alpha release of MPlib (0.10.0):
----------------------------------------------------------------------
* The source is converted to cweb, and split into a library part
(mpdir/lib/*.w) and a frontend executable (mpdir/mpost.w).
* The front end executable is named "newmpost", this takes
care of configuring the MPlib library via C code, and uses
kpathsea for file searching. There is no change file involved,
and the web2c runtime library is not used.
* Some of the internal arrays now grow dynamically when needed:
* the input buffer
* the string pool and number of strings
* the font memory and number of fonts
* the number of "readfrom" and "write" files
* the path segment size
* the input nesting stack
* the number of new internals
* the TFM writing arrays (but these are limited by TFM format)
Still not doing that (so these can only be changed in --ini mode):
* the main memory
* the hash size
* the number of simultaneous macro parameters
* the level of "input" file nesting
* The following command-line options are ignored by the front-end
command (for now):
-[no-]file-line-error
-halt-on-error
-output-directory=
-[no-]parse-first-line
-recorder
-translate-file=
-8bit
-T
The other web2c command-line options should work as normal.
* the mpware tools are not in this distribution, their functionality
will eventually be assimilated into the frontend application.
* the build process depends on a local "ctangle" command being in the
path, for now. The confiration and building system is not yet complete.
* API documentation is still missing, but the MetaPost input language
has not changed.
----------------------------------------------------------------------
What is new in version 1.005:
----------------------------------------------------------------------
* In MetaPost 1.004, mpost --version still incorrectly reported 1.003
* C Compilation of MetaPost 1.004 was broken on MacOS X 10.5
* The sources package did not contain mpboxes.pdf
* Some last-minute fixes to the manual
----------------------------------------------------------------------
What is new in version 1.004:
----------------------------------------------------------------------
* The picture color component commands misbehaved in 1.003:
the current (default) colormodel was not taken into consideration,
so all colors had to be explicit for "redpart" etc. to work.
(this bug is the one broke the graph.mp package)
In 1.004 for "defaulted" colors, the suitable value in the current
(default) colormodel is returned without any errors. This change
also reverts to silently defaulting a 'black' color when asking
for the redpart etc. of an object that cannot be colored at all.
* The picture color component commands misbehaved in 1.003 in
a different manner also: the defaults for uninitialized CMYK
color picture parts were still assuming 'black' was defined as
(1,1,1,1) instead of as (0,0,0,1).
* The macro Gwithpc_ in the graph.mp package did not work properly
with non-rgb colormodel objects.
* plain.mp has a new macro, 'colorpart', that returns the color
parts of a graphical object within a picture in a form suitable
for feeding it back to 'withcolor'.
* The latest kpathsea library from TeXLive is included.
* There is now a separate manual for the boxes package (mpboxes.pdf).
----------------------------------------------------------------------
What is new in version 1.003:
----------------------------------------------------------------------
* Polygonal pens now work better (bug #3 and #7 at supelec.fr).
* When asking for a color part in a picture object, the color models
now have to match each other, otherwise an error will be reported
and the return value will be set to a 'black' part.
* The Makefile fragment (metapost.mk) now defines a separate mpost
target for better integration in TeXLive.
* There was a bug in the internal handling of withprescript and
withpostscript, resulting in incorrect output when paths using
such scripts were stored in picture variables.
* A newline was missing from the PostScript output when the
procset internal variable was set, so the first line of that
accidentally became a PostScript comment.
* Applicable changes from Knuth's updates for MetaFont 2.718281
are incorporated.
* Mpto did not play nice with %&<format> verbatimtex lines, it now
automatically tries to detect comment-lines.
* Dvitomp 1.003 has higher limits for some internal constants like
the number of allowed fonts in DVI files.
* The manual is improved.
----------------------------------------------------------------------
What is new in version 1.002:
----------------------------------------------------------------------
* Version 1.001 introduced a memory allocation error in mpto that could
result in the program looping endlessly
----------------------------------------------------------------------
What is new in version 1.001:
----------------------------------------------------------------------
* The default cmyk 'black' color now uses only black, not all four
ink colors (after a discussion on the mailing list).
* Some issues were reported with the new turningnumber algorithm,
all known problems are now fixed.
* G�bor Braun discovered that mpost did not always download the font
encodings into all the created output files.
* Akira Kakuto and Hartmut Henkel found some small issues in mpto
regarding trailing and leading whitespace.
* A fix for the 'Helvetica' entries in trfonts.map was provided by
Werner Lemberg, and Michail Vidiassov supplied two extra font
entries for troff.map (Symbol and ZapfDingbats). Karl Berry
provided the new file troff-updmap.map, to be used by the updmap
tool in texlive.
* Mpost now supports web2c's --output-directory option.
* Any warnings about missing fonts and characters are now always
written to the terminal as well as to the log.
* Now that makempx is a C program, it needed a different install line
in build.sh. Also, Olaf Mersmann contributed a patch to recognize
'gmake' in build.sh
* Luigi Scarso found some typing errors in the web source that prevented
clean weaving of the source.
* Stephan Hennig fixed a number of problems in the manual (mpman.tex)
and the introduction paper (mpintro.tex). He also wrote new sections on
how to preview metapost graphics and on how to use metapost graphics
inside other documents. On top of that, the manual is now hypertext-aware,
and fixes for a whole series of small problems have been applied.
----------------------------------------------------------------------
What is new in version 1.000:
----------------------------------------------------------------------
* The use of DSC (document structuring) comments has been
been cleaned up, thanks to comments by Michail Vidiassov.
* By setting prologues to 2 or 3, you can ask MetaPost to
reencode and include the used labels fonts in the output,
thus creating proper Encapsulated PostScript files even
if labels are present.
* Support for greyscale and cmykcolor models is added.
* The new drawing options "withprescript" and withpostscript"
allow the user to attach PostSCript special text to a specific
drawing object.
* Setting the new internal "mpprocset" to 1 will make MetaPost
create a somewhat extended preamble that defines shortcuts
for the postscript commands (e..g "l" instead of "lineto").
For big images, this can help shrink the output a bit.
* The pool file is now integrated in the executable, so there
is not separate 'mp.pool' anymore, except at build time.
* Groff support is redone, and dmp now uses kpathsea searching.
Groff related changes are thanks to the efforts of Werner
Lemberg and Michail Vidiassov
* makempx is now a compiled executable on all systems,
thank you Akira Kakuto
* The error for 'special's longer then 255 characters
is removed, so specials can now be of any length.
* There is new turningnumber implementation that attempts
to find the mathematically correct "turningnumber" of a
path. The formulae are derived from a mailinglist discussion
between (especially) Dan Luecking and Giuseppe Bilotta.
* The manual is updated and modernized. It is currently
maintained by Stephan Hennig and Troy Henderson.
------------------------------------------------------------------
Changes in version 0.920:
----------------------------------------------------------------------
* Fixed a long-standing bug in web2c where changing values of the
memory_size setting in web2c could cause crashes and other random
problems. The memory array size is now written to the dump file
and loading is aborted if the values do not match.
* Implement configurable figure output filename templates.
* Implement cmyk, greyscale, and marking only color models.
* The mpost executable is now version 0.920
----------------------------------------------------------------------
Changes in version 0.902:
----------------------------------------------------------------------
* Fix a bug in mpto resulting in correctly placed labels (with
thanks to Dan Luecking)
* Fix a bug blocking compilation of dmp on MacOSX
* The mpost,dmp,mpto executables are now version 0.902
----------------------------------------------------------------------
Changes in version 0.901:
----------------------------------------------------------------------
* A corrected bugfix for bug item 3 from version 0.9 (the old fix
made metapost fail the trap test)
* Included mpost.mp for mem generation
* Updated the trap test output.
* The mpost executable is now version 0.901
----------------------------------------------------------------------
What is new in version 0.9:
----------------------------------------------------------------------
1. There is a new internal quantity called mpversion that reports the
current metapost version, and the version information is also written
to the PostScript file.
2. The LaTeX sources of the mpman, mpintro, and mpgraph manuals have
become part of the distribution package.
3. TEX.mp now has TeX format support through a pair of macros called
TEXPRE() and TEXPOST(). This llows you to process the contents of
the TEX() macro with, for example, LaTeX (instead of plain TeX).
An example is given in the manual.
4. metapost now writes a %%HiReSBoundingBox comment
5. The EPS output no longer contains actual spaces within PostScript
strings as for example output by label("a space"), but their
octal escape (\040) instead.
6. The EPS output now also has a %%BeginProlog DSC comment
as well as %%EndProlog
7. The comments in the Web source have been changed to point out
that on modern machines, acquiring the random seed has actually
become a system-dependant operation (a granularity of whole seconds
is not small enough on new machines).
8. The 'newer' command now accepts more than 2 arguments, testing
each of the files in turn.
----------------------------------------------------------------------
Bugfixes in version 0.9:
----------------------------------------------------------------------
1. Documentation improvements: all known errata and typos have been
removed, better explanations of e.g. dash patterns and dotlabel have
been provided, and a number of omissions has been rectified.
2. The BoundingBox was not computed correctly when a filldraw command
with a noticeable pen size was used at the edge of the picture.
3. Paths starting with degenerate constructions like (0,0)--(0,0)--(0,0)
could overflow memory.
4. The PostScript output could accidentally contain 8-bit characters
within PostScript strings in previous versions because a test was
shared between terminal printing and PostScript printing.
5. A bug has been found in the assignment of serial numbers to independant
variables in metafont 2.71828. This bug affected MP as well, and the
same patch has been applied.
6. The turningnumber was sometimes wrong in unexpected ways. The new
implementation is still sometimes wrong (when there are strange path
segments involved), but in a much more predictable way: the new code
always draws straight lines between the actual points, and calculates
the turningnumber based on that path instead of the actual path. The
effect is that cusps and loops within segments are now completely
ignored. A more thorough fix of turningnumber is planned for the
next release.
7. There was an 'off by one' error in dvitomp wrt. the interpretation
of virtual fonts.
8. mpto uses a new TeX macro for the generation of labels, making it
more robust wrt. strange user code within the actual label text.
9. A missing colon in boxes.mp has been added
10. A missing save in mfplain.mp has been added
11. The generisize in boxes.mp has been fixed so that it now accepts [[ as
a valid variable name
----------------------------------------------------------------------
Version 0.641:
----------------------------------------------------------------------
The only change was to fix the code for transforming a picture that
contains a filldraw. Version 0.64 introduced a bug that caused an
inappropriate memory reference in that case.
----------------------------------------------------------------------
What is new in Version 0.64:
----------------------------------------------------------------------
1. A new primitive command closefrom filename closes a readfrom file
so that subsequent calls to readfrom with that file name will go back
to the beginning of the file.
2. The ^^ notation for unprintable characters is now used only when printing
on the terminal or the log file. Internal computations and the write
command are all 8-bit clean. (This is partly due to material in mp.ch
that changes the initialization of the xchr array. Without these
system-dependent changes, the write command would map all non-ascii
characters to spaces.)
3. Arithmetic overflow during a comparison such as 20000>-20000 is now
ignored. This avoids extraneous error message when using the graph.mp
macro package.
4. Transformations with negative determinants now work properly on pictures
drawn with polygonal pens.
5. When the readfrom operator is applied to a file that does not exist,
an attempt to close a non-open file could cause problems in some
implementations. This has now been fixed.
6. Using draw picture_expression withpen where the picture_expression
was a scaled picture containing dashed lines, the dash lengths would
change. This bug has been fixed.
7. The dashpart operator could return an invalid picture or a picture that
is not properly scaled. This has also been fixed.
8. The |char_base| variable could become negative when using fonts that
do not start at character 0. There was also bad Pascal code in function
b_open_in. This has all been fixed.
9. Dvitomp has been fixed to avoid a font data structure problem that
could cause some characters to come out in the wrong font when you
mix virtual and non-virtual fonts.
10. Dvitomp now correctly prints font names when there is a checksum
mismatch, and it aborts instead of just printing an error if a tfm
or vf file is bad.
11. In plain.mp, the drawdblarrow macro now uses filldraw so that it works
better with large pen sizes.
----------------------------------------------------------------------
Version 0.632:
----------------------------------------------------------------------
When prologues is negative, the output files use full precision for
coordinates in "%%BoundingBox" comments. In btex..etex blocks,
"number too large" and "invalid character" errors are suppressed.
The result of btex..etex is now guaranteed to be in a setbounds path
so that a for...within iteration will always treat it as a unit.
There are also some obscure bug fixes involving string compaction when
scanning a file name or when mp is compiled in debug mode. Some possible
identifier name conflicts and range check errors have also been fixed.
----------------------------------------------------------------------
Version 0.631:
----------------------------------------------------------------------
This version fixes an obscure bug that could cause certain perfectly valid
strings to be printed as "???" or " NONEXISTENT". It also includes a minor
fix to the PATHEXPAND code that prevents running out of file descriptors.
----------------------------------------------------------------------
What is new in Version 0.63:
----------------------------------------------------------------------
1. Backslashes in the PostScript output are rendered correctly. They used
to come out as (\) instead of (\\).
2. Recycling an independent variable should no longer cause spurious overflows.
(This bug was recently found in mf.web.)
3. Pythagorean addition should now be faster in certain trivial cases.
4. Rotating text by arbitrary angles should no longer cause bad PostScript
output. The problem was that arguments to "fshow" could be inaccurate.
5. Obscure bugs inherited from mf.web are now fixed. These involve
balancing parentheses showing on the terminal, reporting the correct
line number in case of buffer overflow, and removing spurious reference
counts that could effect end-of-job statistics.
6. Fonts with ec=255 should no longer cause mp's PostScript output routines
to go into a loop.
7. When mp's string mechanism was heavily used, file names could occaisonally
be printed on the terminal and log file as "(?)". This has been fixed.
8. Setting PATHEXPAND in site.h causes mp, dvitomp and dmp to understand "//"
in path variables as "search multiple levels of subdirectories". This is
for compatibility with recent versions of the Web2c TeX distribution.
9. A typo in mpware/makempx and mpware/troffmpx has been fixed. Previous
versions of these scripts would not run on some systems.
10. Data files *.d have been added to the doc directory. These are used by
doc/mpgraph.mp which generates figures for "Drawing Graphs with MetaPost".
11. Typos in mpintro.tex and mp.web's TeX material have been fixed.
12. Files examples.mp, mpintro.tex and mpintro.bib have moved from mplib to
the doc directory.
13. The author's email address now appears in the README file.
----------------------------------------------------------------------
Macros added to the mplib directory between Versions 0.50 and 0.62:
----------------------------------------------------------------------
rboxes.mp is a slightly more general version of boxes.mp
TEX.mp provides a way of running tex dynamically instead of as a pre-processor
graph.mp, format.mp, and sarith.mp are documented in doc/mpgraph.ps
(This is the same as ftp://netlib.att.com/netlib/att/cs/cstr/164.ps.Z)
marith.mp, string.mp, texnum.mp, and troffnum.mp are low-level packages
used by graph.mp, format.mp, and sarith.mp.
----------------------------------------------------------------------
Other minor bug fixes subsequent to Version 0.60
----------------------------------------------------------------------
1. plain.mp has been fixed so that the x**y works properly when x<0 and y is
a negative integer.
2. Programs mptotex.c and mptotr.c which extract btex..etex material have been
fixed so they work properly with input files that do not end with a newline
character.
3. Program dmp.c which handles troff output from btex..etex blocks has been
modified to avoid outputting any non-ASCII characters that the C function
isprint() accepts.
4. Program dmp.c no longer gets troff graphics specials confused with text.
This seldom matters because btex..etex blocks are unlikely to contain
troff graphics.
5. Pictures containing clipped subpictures could come out with some colors
in the subpicture wrong.
6. Colors in PostSript output were not being restricted to the standard 0..1
range.
7. Transforming a path or a pen should no longer generate extraneous overflow
errors in certain unusual situations.
8. Drawing with a degenerate 2-vertex polygonal pen such as penrazor should
no longer cause an infinite loop in certain unusual situations.
9. There were some bugs in the mfplain macros. (These macros are designed
to similate plain METAFONT.) The drawing and filling macros now apply
currenttransform to the path but not the pen rather than vice versa.
The predefined modes now set o_correction to 1.0.
10. For security reasons, mp can no longer read or write files whose names
begin with '.'
----------------------------------------------------------------------
Changes to the MetaPost language between Version 0.50 and Version 0.60
----------------------------------------------------------------------
1. New operator `readfrom <filename>' and new command
`write <string expression> to <filename>' do file I/O. Plain defines
a special string EOF that readfrom returns to indicate end-of-file
and write..to understands as well.
2. New iteration type `for p within <picture expression>: <loop text> endfor'
iterates through the interior components of the picture. An `interior
component' is a single pen stroke, filled outline, or piece of typeset
text. A part of the picture enclosed in a clipping or setbounds path
also counts as an interior component. If the whole picture is enclosed
in such a path, the for..within iteration looks inside. Note that a
picture generated by btex..etex is enclosed in a setbounds path.
3. The length operator now applies to pictures. It returns the number of
interior components.
4. New boolean operators stroked, filled, textual, clipped, bounded test
the first component of a picture. A picture enclosed in a clipping or
setbounds path counts as a single component.
5. Part extraction operators now work for pictures. Standard operators
redpart, greenpart, bluepart apply to the color of the first component
and xpart, ypart, xxpart, xypart, yxpart, yypart extract parts of the
tranformation that has been applied to a text component. If `textual p'
is false, the transform components are all zero; if `clipped p' or
`bounded p' is true, the color parts are all zero. Additional operators
fontpart, textpart, pathpart, penpart, dashpart extract other information
from the first component of a picture. They all return null values when
the first component has the wrong type: fontpart and textpart return
null strings; pathpart returns the path (0,0); penpart returns nullpen;
and dashpart returns nullpicture.
6. The construction `dashed nullpicture' is now a no-op. It used to be
an error.
7. The clip and setbounds statements used to ignore operations on empty
pictures. Now they do not.
8. Structuring comments in the PostScript output are now based on EPSF-3.0
as described in the 2nd Edition of the PostScript Reference Manual.
When prologues is 0, some structuring comments are included but the
output is not flagged a `conforming document'. Previous versions of
MetaPost behaved similarly but used slightly different structuring
comments.
9. When warningcheck is 0, numeric tokens and results from the hex and
oct operators can be as large as 32767.99998. The old limit of about
4096 applies only when warningcheck is positive.
10. Various optimizations should make the output a little more compact.
11. For PostScript engines that obey the scan-conversion rules documented
in the 2nd edition PostScript Language Reference Manual, hrules and
vrules in btex..etex blocks should now come out to exactly the right
number of pixels. The change affects all pen strokes drawn in MetaPost
It is implemented via PostScripts dtransform and idtransform operators.
12. A bug involving setbounds and MetaPost's corner operators has been fixed.
13. Degenerate elliptical pens no longer cause PostScript to divide by zero.
14. Fixed a very obscure bug involving readstring and end-of-file.
15. String compaction statistics are now printed correctly when the job
terminates with tracingstats positive.
----------------------------------------------------------------------
Changes to the source files between Version 0.50 and Version 0.60
----------------------------------------------------------------------
CHANGES to ./README.MP
The installation instructions should now be clearer. They also explain
how to cope with verious versions of WEB2C.
CHANGES to ./site.h
I removed unused entries and clarified instructions in commentary material.
Confusing comments about possibly merging it with the WEB2C version of site.h
were removed--I think such merging is a bad idea.
CHANGES TO ./Makefile, mp/Makefile, mpware/Makefile:
Improved default settings, simplified the `install' recipe,
fixed a few missing depencies, portability problems, etc.
RENAMED FILES
mp/mp.defines, mpware/mpware.defines, mpware/dvitompext.c
TO mp/mp.def, mpware/mpware.def, mpware/dvimpext.c
(The names also changed in the Makefiles and convert scripts)
CHANGES TO mp/mp.web, mp/mp.ch, mp/mp.def, mp/mpext.c:
Lots of new features were added as noted above. The only new system-
dependencies are for `readfrom' and `write...to'.
The change file now increases max_read_files; it doesn't bother with
max_write_files, but perhaps it should. There is a new change entitled
"Path selector for..readfrom file". From the web2C sources I borrowed
a change "`logname' is declared in <unistd.h> in some systems". I also
added a PASCAL-like eof() routine to mpext, removed a change entitled
"avoid using eof() in read_psname_table" and added a new change
"[48.1199] `eof'...[in read_mem_file]".
Reorganization of math routines in the mp directory:
I moved the floating-point math routines from mpext.c to mpath.c. A
C-language version of the standard math routines was moved from mpmath.c
to a new file pmath.c for use in mathtest only. This required chages to
mathtest.c and time.c (also used only for mathtest). The point of all
this is that there is now just one copy of the floating-point math routines
and it is used for mathtest and (optionally) for mp itself.
Routines in doc and mp/trapdir:
The output was updated to Version 0.60. Another test file mptrap.mp
tests new features. There have also been minor updates to the manual,
although the new features for Version 0.60 are not included yet.
CHANGES to macros in mplib:
A minor change to boxes.mp should make it more robust. Changed default
setting of tracinglostchars in mfplain.mp and plain.mp. Added a string
constant EOF to plain.mp for use with readfrom and write..to.
Changed mproof.tex to make it more portable as suggested by Knuth.
CHANGES to mpware/dvitomp.web, mpware/dvitomp.ch:
The web file was changed to output rules as horizontal or vertical
penstrokes with butt endcaps. This also affected dvitomp.ch. Also in
dvitomp.ch, put terminal output on stdout instead of stderr and require
the output file to be given on the command line.
CHANGES to mpware/makempx, mpware/troffmpx:
Added comments explaining what path names need fixing. Portability improvements
and dvitomp's output change affect makempx only.
CHANGES to mpware/mptotex.c mpware/mptotr.c mpware/testex.err mpware/testex.mp:
Ignore an initial newline in the TeX (or troff) material to avoid generating
a blank line in the output file. The test file now covers this case.
CHANGE to mpware/newer.c
Minor changes to make it compile in strict ANSI/POSIX environments.