diff --git a/CHANGES b/CHANGES
deleted file mode 100644
index 05faf13051a7982169ab71e0ba03b53d6c4de2e1..0000000000000000000000000000000000000000
--- a/CHANGES
+++ /dev/null
@@ -1,1621 +0,0 @@
-
-This file is public domain.
-
-
-----------------------------------------------------------------------
-What is new in MetaPost version 2.01:
-----------------------------------------------------------------------
-* It's a version needed to mark the patch mpx_copy_mpto.
-
-
-----------------------------------------------------------------------
-What is new in MetaPost version 2.0rc2:
-----------------------------------------------------------------------
-
-* Small cleanup of the code
-* Bump to version 2.0rc2: the current version is 2.00
-* Added the envelope primitives to mpman
-
-
-----------------------------------------------------------------------
-What is new in MetaPost version 2.0rc1:
-----------------------------------------------------------------------
-
-* Mainly fixes for wrong path directions, minor issues on tfm and png
- backend. The version says "2.000" to keep the version as a valid
- number.
-
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.9991:
-----------------------------------------------------------------------
-
-* Some issues fixed, but really this is in preparation of metapost 2.0.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.999:
-----------------------------------------------------------------------
-
-* The numbersystem 'binary' is now operational.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.902:
-----------------------------------------------------------------------
-
-* Fixed a crash in 'decimal' mode during choose_scale calculations.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.901:
-----------------------------------------------------------------------
-
-* Fixed a bug in 'decimal' mode that affected (among other things)
- the directionpoint and bbox calculations.
-
-* Fixed a bug in 'decimal' mode calculation of sine / cosine that
- affected the precision of the answer in situations where
- 'numberprecision' was less than 34.
-
-* Updated the number parsing in 'decimal' mode to detect 'too precise'
- input and optionally generate an error in that case (depends on
- 'warningcheck')
-
-* Fixed a bug in the svg output where it could crash in 'decimal' mode.
-
-* Fixed a bug in the png output where it could get confused if there
- was more than one text label
-
-* Fixed a bug in the png output for stroked paths
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.900:
-----------------------------------------------------------------------
-
-* Updated the embedded libraries, and a few build system fixes.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.890:
-----------------------------------------------------------------------
-
-* The numbersystem 'decimal' is now operational.
-
-* New internal: 'numberprecision', for use with 'the 'decimal' number
- system. The (numeric) value expresses the desired calculation precision,
- in decimal places.
-
- system default min max
- ============================
- scaled 10 10 10 (assignment effectively ignored)
- double 16 16 16 (assignment effectively ignored)
- decimal 34 1 1000
-
-* Bug fix: in the 'double' numbersystem,
-
- if X = scantokens decimal X:
-
- will now always be true, because the 'decimal' operator now has
- the same resolution as the scanning routine (which is two decimal
- places more than in the previous release).
-
-* Fixed a bug in the handling of the / operator (wrong precendence).
-
-* Fixed a bug in arctime (did not handle negative values currectly).
-
-* Fixed TFM generation issues (various scale-related errors).
-
-* Fixed application crashes when there was no TEXMF tree to be found
- anywhere.
-
-* It is no longer possible to assign to the 'numbersystem' internal.
-
-* There is a new definition of 'drawdot' in plain.mp.
-
-* PNG output did not output anything for draws of a single point.
-
-* Metapost now prints the full name of any preloaded files.
-
-* Fixed a bug in the handling of labels with embedded ascii zero(es).
-
-* Fixed handling of unknown command-line options, the reporting
- on used libraries in the --version output, and the banner line.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.803:
-----------------------------------------------------------------------
-
-* Fixed a bug in the path tension handling that sometimes caused
- distorted output.
-
-* A number of small alterations to the build system making it easier
- to integrate metapost with W32TEX.
-
-* Fix the internal rounding functions in --numbersystem=double so that
- they round exactly like in --numbersystem=scaled mode.
-
-* From Elie Roux: a fix to graph.mp to prevent log-scaled graphs with
- large ranges from causing the "Value is too large" error.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.802:
-----------------------------------------------------------------------
-
-* Fixed a bug causing overly large characters in SVG output mode when
- prologues != 3.
-
-* Removed a crash during free-ing of TFM metric data at the end of the
- run.
-
-* Fixed a problem with colors in SVG output mode.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.801:
-----------------------------------------------------------------------
-
-* fixed an off-by-one error in the SVG output that prevented the last
- font's glyphs from actually being output to the svg file under
- prologues:=3;
-
-* fixed a bug in bbox calculations in that caused the max y to be set
- based on the maximum x coordinate internal value instead of the
- maximum y coordinate.
-
-* fixed a bug where metapost incorrectly produced a 'degenerate spec'
- error.
-
-* build fixes for various platforms imported from TeXLive 2013, as
- well as the latest kpathsea development etc.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.800:
-----------------------------------------------------------------------
-
-* A new string valued internal "outputformatoptions" is used by PNG
- output mode to control the png file format. In the future, this
- internal may also be used for options to the other output formats.
-
- The syntax for "outputformatoptions" is a space-separated list of
- settings. Individual settings are keyword+'='+value. The only
- currently allowed ones are:
- format=[rgba|rgb|graya|gray]
- antialias=[none|fast|good|best]
- No spaces are allowed on the left, nor on the right, of the equals
- sign inside a setting.
-
- The assignment that would match the compiled-in default setup is:
- outputformatoptions := "format=rgba antialias=fast";
- however, "outputformatoptions" is initially the empty string.
-
- Some notes on the (new) PNG output formats:
- - The 'rgb' and 'gray' subformats have a white background. The
- 'rgba' and 'graya' subformats have a transparent background.
- - Bitdepth is always 8.
- - In all cases, the image is initially created in 8-bit RGB
- mode. For 'gray' and 'graya', the RGB colors are reduced just
- before the actual PNG file is written, using a standard rule:
- g = 0.2126*r + 0.7152*g + 0.0722*b
- - CMYK colors are always converted to RGB during generation of
- the output image using:
- r = 1 - (c+k>1 ? 1 : c+k);
- g = 1 - (m+k>1 ? 1 : m+k);
- b = 1 - (y+k>1 ? 1 : y+k);
- - If you care about color conversions, you should be doing a
- "within <pic>" loop inside "extra_endfig". The built-in
- conversions are more of a fallback.
-
-* A new string-valued internal "outputfilename", which is set by
- "shipout" to the value of the just created file name. Until the
- first shipout has occurred, it is the empty string.
-
-
-* Fixed a number of bugs where Metapost loaded the default font map
- file multiple times, resulting in lots of "fontmap entry for
- `<fontname>' already exists, duplicates ignored" warnings.
-
-* The "glyph <> of <>" operation could crash on fonts with empty
- subpaths in the charstrings.
-
-* Fixed a bug in the postscript encoding reader that caused a buffer
- overflow (fatal error) for encoding files that do not end with a
- newline.
-
-* Sped up png creation a bit by using smarter libpng options.
-
-* In the 'double' numbersystem, lots of precision was lost due to a bad
- internal conversion of fractions to scaled values. This affected the
- "rotated by", "directiontime", "sind" and "cosd" primitives, as well
- as internal dependency calculations.
-
-* In the 'double' numbersystem, an internal rounding error caused
- "directiontime" to return bad results for requests near zero.
-
-* There was a big scaling miscalculation while outputting glyphs in SVG
- mode with "prologues:=3". The output labels were so big that they
- fell completely outside of the generated image.
-
-* A problem resulting in 'This can't happen (endinput)' caused by a
- missing "end" at the end of the run was fixed.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.790:
-----------------------------------------------------------------------
-
-* Lots of speedups.
-
-* Fixed bug in division expressions that started with a literal number.
-
-* A few problems with bad deallocations were solved.
-
-* A bug where after saving and redefinition of primitives, they later
- were restored to 'undefined' instead of to their primitive meaning.
-
-* The "double" literal number parser now only accepts scientific
- notation if the character following 'E' or 'e' is '+', '-', or
- a digit.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.780:
-----------------------------------------------------------------------
-
-* The turningnumber calculation in 1.770 was bugged.
-
-* The picture export in 1.770 forgot to add trailing zeroes to the
- log and term output channel resulting in rubbish output.
-
-* The arguments of the PS "dtransform" operator have been fixed
- (was wrong since 1.750).
-
-* The warning limit in numbersystem=double mode is now exactly 2**52.
-
-* A bunch of obvious memory leaks fixed. Not all yet, but now the
- MPlib seems to be usable even with many graphics.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.770:
-----------------------------------------------------------------------
-
-This is an alpha release for testing & debugging only!
-
-* The command line switch --numbersystem replaces --math.
-
-* Two new internals: numbersystem (string, read-only, either "scaled"
- or "double" at the moment) and numberprecision (numeric, currently
- a no-op).
-
-* There is a new bitmap backend:
-
- outputformat:="png";
-
- This backend uses cairo and libpng to generate PNG bitmap data.
- The created PNG used RGB + Alpha, with anti-aliasing, at 72dpi,
- and with a transparent background.
-
-* Associated with this, there are new internals "hppp" and "vppp",
- that are used by the bitmap backend to decide on the scale of
- the generated bitmap. Default value for both new internals is
- "1.0", i.e. one pixel per Metapost point.
-
- The internal names come from metafont.
-
-* There are two new primitives for use with picture item objects:
-
- prescriptpart
- postscriptpart
-
-* The C API has been extended to allow path control point resolution
- without going through the Metapost input language, see
- manual/mplibapi.tex for details.
-
-* The C API has been extended with a "math_mode" switch in the options
- structure, and the memory size options as well as "ini_mode" have
- been removed (the MPlib instance now always starts up in inimp mode)
-
-* The code for picture shipout now uses "double" for all floating point
- values. This can give small differences in the actual output files in
- traditional mode due to the required scaled -> double conversion, but
- was necessary to support the new numerical backend code.
-
-* The Lua API internals have been updated to reflect the C API changes.
-
-* All known crashes in earlier versions of Metapost have been fixed.
-
-Known issues:
-
-* The manual is not up-to-date yet on the metapost input language
- changes.
-
-* There are various memory leaks.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.750:
-----------------------------------------------------------------------
-
-This is an alpha release for testing & debugging only!
-
-* mpost now accepts --math=double as an argument. This switches the
- internal arithmetic functions from using a scaled 32-bit data type
- to 64-bit floating point.
-
-* With --math=double, the input scanner has been changed to allow
- a := 1.0E20
- as valid input format for a numerical value
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.504:
-----------------------------------------------------------------------
-
-* Small build system tweaks from TeXLive 2012.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.503:
-----------------------------------------------------------------------
-
-* String comparisons have been fixed, these were broken in previous
- 1.50x versions.
-
-* verbatimtex ... etex processing had a horrible bug that is now
- fixed.
-
-* A fix has been applied for a bug that made redeclared variable
- subscript tags disappear.
-
-* The behavior of the %{<internal>} escape sequence in 'outputtemplate'
- changed (but not that of the single-letter shortcuts). Internal
- variables within %{...} are neither rounded nor zero-padded.
-
-* A very long list of improvements to the manual.
-
-* MetaPost now adheres to the openin_any / openout_any settings in
- texmf.cnf
-
-* The 'prologues:=3 output' with embedded labels was unreliable,
- especially when the resulting eps was included into a TeX document
- via dvips.
-
-* 'newinternal numeric' has been fixed, it generated an error in
- metapost 1.211 and earlier 1.50x versions.
-
-* Label regeneration sometimes failed to run when the file time stamps
- were close together.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.502:
-----------------------------------------------------------------------
-
-* New build system and kpathsea imported from TeX Live.
-
-* Various bugfixes.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.501:
-----------------------------------------------------------------------
-
-* The maximum number of variable instances has increased from approx.
- 33 million (2^25-1) to 2 billion (2^31-1).
-
-* New build system and kpathsea imported from TeX Live.
-
-* Many small bugfixes to 1.500.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.500:
-----------------------------------------------------------------------
-
-* Actual memory dump files do not exist any more. --mem=<MEM> and
- all other methods of supplying a MEM file are now interpreted
- somewhat like this pseudo-metapost-code:
-
- begingroup;
- let dump = end;
- input MEM[.mp];
- endgroup;
-
- this process is supposed to be transparent besides the facto that
- there is some extra terminal output and logging.
-
-* All memory is now allocated and freed dynamically. There are only
- two remaining overflow errors(1):
-
- "expansion depth" : this is a guard against infinite recursion,
- the value is 10000.
- "sizes per font" : this is maxed out for data-structure reasons,
- the value is 32767.
-
- from texmf.cnf, now only the "error_line", "half_error_line" and
- "print_line settings" are used.
-
- (1) but now you can reach the operating system limits, of course.
-
-* As this is an alpha release containing lots and lots of new code,
- MetaPost starts up with the internal equivalent of 'loggingall;'
- in effect. This results in log files that can help in debugging.
-
-* Expect bugs and (minor) memory leaks.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.212:
-----------------------------------------------------------------------
-
-* Small build system tweaks from TeXLive 2011.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.211:
-----------------------------------------------------------------------
-
-* In previous 1.20X versions, the 'glyph infont' operator did not handle
- fonts with seac (old-style composite characters) properly.
-
-* Incorporated the latest versions of kpathsea and the build system
- from TeXLive.
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.210:
-----------------------------------------------------------------------
-
-* In previous 1.20X versions, btex ... etex handling forgot to take
- the passed directory location of input-ed files into account.
-
-* verbatimtex ... etex is now copied as is. Whitespace stripping
- and appending of % no longer happen.
-
-* The mpost executable now always strips exactly one extension from
- the jobname (unless explicit --jobname was given)
-
-----------------------------------------------------------------------
-What is new in MetaPost version 1.209:
-----------------------------------------------------------------------
-
-* Previous 1.20X mem files were architecture-dependent.
-
-* Metapost now uses getopt once again, which makes the commandline
- handling compatible with pre-1.20X versions. However, the syntax
- -sprologues=1 is now no longer supported (the space between -s
- prologues is now mandatory).
-
-* On some systems, metapost would crash inside the function that prints
- the 'fatal error' message.
-
-* The 'glyph infont' operator would sometimes cause crashes, and in
- other cases it generated bad output.
-
-* There was a space missing in the generated output when mpprocset
- was set. This was still legal PostScript, but it confused mptopdf.
-
-* In previous 1.20X versions, the font map file was read for each
- figure that contained a label, resulting in lots of harmless
- but scary warnings being reported.
-
-* The --debug switch is now documented in the command-line help.
-
-* The help text now mentions the metapost version.
-
-----------------------------------------------------------------------
-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.
-
-* Gábor 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
-* mpost no longer autoconverts r==g==b colors to grayscale in the
- postscript output.
-
-----------------------------------------------------------------------
-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.
diff --git a/CHANGES b/CHANGES
new file mode 120000
index 0000000000000000000000000000000000000000..9897c032f0ea599935434c379bf7bae803884b2f
--- /dev/null
+++ b/CHANGES
@@ -0,0 +1 @@
+./source/texk/web2c/mplibdir/NEWS
\ No newline at end of file
diff --git a/manual/mpman-app-numbersystems.tex b/manual/mpman-app-numbersystems.tex
index 0e9dfaf09e86de8b59e86a6e1c02eb05b25ca20d..7e82e29c8734f16b7b312ce763fe74ebe71aa848 100644
--- a/manual/mpman-app-numbersystems.tex
+++ b/manual/mpman-app-numbersystems.tex
@@ -1,10 +1,10 @@
\svnInfo $Id$
-\section{High-precision arithmetic with MetaPost}
+\section{High-precision and interval arithmetic with MetaPost}
\label{hparith}
In addition to the fixed-point arithmetics inherited from \MF, MetaPost
can also do higher-precision arithmetics. In total, MetaPost can handle
-numeric quantities in four internal representation formats or number
+numeric quantities in five internal representation formats or number
systems. Number systems differ in rounding errors\index{rounding error}
introduced by and the speed of arithmetic operations. Simply storing a
numeric value in a variable may already introduce a rounding error, so
@@ -14,7 +14,7 @@ The internal representation format used for numeric quantities can be
determined by a command-line switch
\texttt{-numbersystem}\index{command-line!mpost?\texttt{mpost}!-numbersystem?\texttt{-numbersystem}}
when invoking the MetaPost executable. Argument is a string and can be
-one of \texttt{scaled}, \texttt{double}, \texttt{binary}, or
+one of \texttt{scaled}, \texttt{double}, \texttt{binary}, \texttt{interval} or
\texttt{decimal}. The argument is stored in an internal string variable
\texttt{numbersystem}\index{numbersystem?\texttt{numbersystem}}\label{Dnumbersystem}.
Assigning a value to this variable at run-time triggers an error.
@@ -58,6 +58,26 @@ is an integer in the range $[-9,999,999; +9,999,999]$. All arithmetic
operations are done in software using the MPFR library~\cite{lib:mpfr}
and are usually orders of magnitude slower than in \texttt{double} mode.
+The \index{interval?interval number system}\texttt{interval} number
+system MPFI~\cite{lib:mpfi}, introduced in version \texttt{2.10}, is built on the top of the MPFR library
+and an interval quantity \texttt{[}\textit{number}\texttt{,}\textit{number}\texttt{]} is entered as
+\begin{center}\index{interval\_set?\texttt{interval\_set}}\label{Dintervalset}\texttt{w := interval\_set(}\textit{number}\texttt{,}\textit{number}\texttt{);}\end{center}
+An interval is a set, the left extrema being
+\begin{center}\index{interval\_get\_left\_endpoint?\texttt{interval\_get\_left\_endpoint}}\label{Dintervalleft}\texttt{l := interval\_get\_left\_endpoint(}\textit{interval}\texttt{);}\end{center}
+and the right extrema
+\begin{center}\index{interval\_get\_right\_endpoint?\texttt{interval\_get\_right\_endpoint}}\label{Dintervalright}\texttt{r := interval\_get\_right\_endpoint(}\textit{interval}\texttt{);}\end{center}
+and it's always $l\leq r$\,; a number \texttt{x} is always seen as the interval \texttt{[x,x]}, i.e. a set with one element.
+At first glance, interval arithmetic can be confusing: if $w$ is an interval,
+$w*w$ is the set $\left\{ x*x: x\in w\right\}$, but $f(w)=w^2$ is the set $\left\{f(x): x\in w\right\} = \left\{x^2: x\in w\right\}$:
+if $w=[-1,1]$ then $w*w=[-1,1]$ and $w^2=[0,1]$. On the other hand, it's easy to verify that $w*w*w = w^3$ always. For this reason,
+given that currently the
+implementation of the MetaPost functions in MPFI mimics those of MPFR and they are not adapted to the interval arithmetic,
+the main utility of interval mode is the implementation of algorithms in MetaPost language.
+
+
+
+
+
Number system \texttt{decimal}\index{decimal?\texttt{decimal}} provides
arbitrary precision floating-point arithmetics similar to the
\texttt{binary} number system. Except that it uses a base of~10 for the
diff --git a/manual/mpman-app-optab.tex b/manual/mpman-app-optab.tex
index 5cb62e5239078e32a4d0090f8d3cb41e8c4b877c..bd4b2a6d727be43e094330a49a35c1cb116a5086 100644
--- a/manual/mpman-app-optab.tex
+++ b/manual/mpman-app-optab.tex
@@ -79,6 +79,9 @@ hex\index{hex?\texttt{hex}}& --& string& numeric& --& Interpret as a hexade
infont\index{infont?\texttt{infont}}& string& string& picture& \pageref{Sinfont}& Typeset string in given font\\\hline
\pl intersec\-tionpoint\index{intersectionpoint?\texttt{intersectionpoint}}& path& path& pair& \pageref{Disecpt}& An intersection point\\\hline
intersec\-tiontimes\index{intersectiontimes?\texttt{intersectiontimes}}& path& path& pair& \pageref{Disectt}& Times ($t_l,t_r)$ on paths $l$ and $r$ when the paths intersect\\\hline
+interval\-\_get\-\_left\-\_endpoint\index{interval\_get\_left\_endpoint?\texttt{interval\_get\_left\_endpoint}} & --& numeric & numeric& \pageref{Dintervalleft}& The left endpoint of an interval quantity\\\hline
+interval\-\_get\-\_right\-\_endpoint\index{interval\_get\_right\_endpoint?\texttt{interval\_get\_right\_endpoint}}& --& numeric & numeric& \pageref{Dintervalright}& The right endpoint of an interval quantity\\\hline
+interval\-\_set\index{interval\_set?\texttt{interval\_set}}& --& pair & numeric& \pageref{Dintervalset}& Create an interval quantity\\\hline
\pl inverse\index{inverse?\texttt{inverse}}& --& transform& transform& \pageref{Dinv}& Invert a transformation\\\hline
known\index{known?\texttt{known}}& --& any& boolean& \pageref{Dknown}& Does argument have a known value?\\\hline
length\index{length?\texttt{length}}& --& path\par string\par picture& numeric& \pageref{Dlength}\par \pageref{DlengthString}\par \pageref{DlengthPicture}& Number of components (arcs, characters, strokes, \ldots) in the argument\\\hline
diff --git a/manual/mpman-app-refman.tex b/manual/mpman-app-refman.tex
index ad8b84bfb0ee05bf2ba11ced0313f7d8331bc14b..266bc9d7226de35bc3940582d1dd2a463bd95135 100644
--- a/manual/mpman-app-refman.tex
+++ b/manual/mpman-app-refman.tex
@@ -558,7 +558,8 @@ $\tt \descr{unary op} \rightarrow \descr{type}$\\
$\tt \qquad \;|\; abs \;|\; angle \;|\; arclength \;|\; ASCII \;|\; bbox \;|\; blackpart \;|\; bluepart \;|\; bot \;|\; bounded$\\
$\tt \qquad \;|\; ceiling \;|\; center \;|\; char \;|\; clipped \;|\; colormodel \;|\; cosd \;|\; cyanpart \;|\; cycle$\\
$\tt \qquad \;|\; dashpart \;|\; decimal \;|\; dir \;|\; floor \;|\; filled \;|\; fontpart \;|\; fontsize$\\
-$\tt \qquad \;|\; greenpart \;|\; greypart \;|\; hex \;|\; inverse \;|\; known \;|\; length \;|\; lft \;|\; llcorner$\\
+$\tt \qquad \;|\; greenpart \;|\; greypart \;|\; hex \;|\; interval\_get\_left\_endpoint \;|\; interval\_get\_right\_endpoint$\\
+$\tt \qquad \;|\; interval\_set \;|\; inverse \;|\; known \;|\; length \;|\; lft \;|\; llcorner$\\
$\tt \qquad \;|\; lrcorner\;|\; magentapart \;|\; makepath \;|\; makepen \;|\; mexp \;|\; mlog \;|\; not \;|\; oct \;|\; odd$\\
$\tt \qquad \;|\; pathpart \;|\; penpart \;|\; readfrom \;|\; redpart \;|\; reverse \;|\; round \;|\; rt \;|\; sind \;|\; sqrt$\\
$\tt \qquad \;|\; stroked \;|\; textpart \;|\; textual \;|\; top \;|\; ulcorner$\\
@@ -939,7 +940,7 @@ Here's a summary of the command-line switches provided by mpost:
in the current directory or specified via a full path.\\
\cmdindex{-numbersystem}=\tdescr{string}
& Set arithmetic mode to one of \texttt{scaled}, \texttt{double},
- \texttt{binary}, \texttt{decimal}\\
+ \texttt{binary}, \texttt{decimal}, \texttt{interval}\\
\cmdindex{-progname}=\tdescr{string}
& Pretend to be the \tdescr{string} executable.\\
\cmdindex{-recorder}
diff --git a/manual/mpman.bib b/manual/mpman.bib
index 7f089f8ba71691916764ee606e3fb248a5a1388a..378085678ca811965354712e3f9a8e3229829e2e 100644
--- a/manual/mpman.bib
+++ b/manual/mpman.bib
@@ -128,6 +128,23 @@
significant slowdown with respect to other arbitrary-precision tools
--- and discuss a few applications where such a library can be useful.",
}
+@article{lib:mpfi,
+ author = {Nathalie Revol and
+ Fabrice Rouillier},
+ title = {Motivations for an Arbitrary Precision Interval Arithmetic and the
+ {MPFI} Library},
+ journal = {Reliab. Comput.},
+ volume = {11},
+ number = {4},
+ pages = {275--290},
+ year = {2005},
+ url = {https://doi.org/10.1007/s11155-005-6891-y},
+ doi = {10.1007/S11155-005-6891-Y},
+ timestamp = {Thu, 16 Apr 2020 11:28:20 +0200},
+ biburl = {https://dblp.org/rec/journals/rc/RevolR05.bib},
+ bibsource = {dblp computer science bibliography, https://dblp.org}
+}
+
@misc{lib:decnumber,
key = "decnumber",
title = "dec{N}umber {ANSI} {C} implementation of General Decimal Arithmetic",
diff --git a/manual/mpman.tex b/manual/mpman.tex
index 80c7ce8d0c90ad5484335935132a587f86b55674..990ccd75e290ffcff728f35285a3f6109ef4f583 100644
--- a/manual/mpman.tex
+++ b/manual/mpman.tex
@@ -14,7 +14,7 @@
\usepackage[nofancy]{svninfo}% Access VCS information.
\svnInfo $Id$
%\svnInfo $Id$
-\newcommand*{\mpversion}{2.00}
+\newcommand*{\mpversion}{2.10}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
@@ -63,8 +63,9 @@
\usepackage{multicol}
\usepackage[rgb,x11names]{xcolor}% Optimize for screen reading.
-\usepackage{hyperxmp}
\usepackage{hyperref}
+\usepackage{hyperxmp}
+%%\usepackage{hyperref}
\hypersetup{
pdftitle={MetaPost: A User's Manual},
pdfauthor={John D. Hobby and the MetaPost development team},
diff --git a/source/texk/web2c/mplibdir/ChangeLog b/source/texk/web2c/mplibdir/ChangeLog
index edd54eadc2457317ce38809b48dd8f979c244b0e..1bce2fdae0d1913d60c2d07ee8f5450259ed3143 100644
--- a/source/texk/web2c/mplibdir/ChangeLog
+++ b/source/texk/web2c/mplibdir/ChangeLog
@@ -1,22 +1,43 @@
+2024-02-16 Luigi Scarso <luigi.scarso@gmail.com>
+ * Updated manual. MetaPost 2.1
+
+2024-02-12 Luigi Scarso <luigi.scarso@gmail.com>
+ * Fixed "warning: strncat specified bound 1 equals source length [-Wstringop-overflow=]" in mpxout.w
+
+2024-01-28 Luigi Scarso <luigi.scarso@gmail.com>
+ * Merge branch mpfi.
+
2024-01-26 Luigi Scarso <luigi.scarso@gmail.com>
- * Added source/libs/mpfi/TLpatches and source/libs/mpfi/m4
+ * Interval arithmetic: Added source/libs/mpfi/TLpatches and source/libs/mpfi/m4
2024-01-03 Luigi Scarso <luigi.scarso@gmail.com>
- * Fixed "++" and "+-+" by replacing a*a with sqr(a). Better error message for square root of negative numbers.
+ * Interval arithmetic: Fixed "++" and "+-+" by replacing a*a with sqr(a). Better error message for square root of negative numbers.
2024-01-02 Luigi Scarso <luigi.scarso@gmail.com>
- * fixed negate for mpfi.
+ * Interval arithmetic: fixed negate for mpfi.
2023-12-31 Luigi Scarso <luigi.scarso@gmail.com>
- * fixed check interval for square root
+ * Interval arithmetic: fixed check interval for square root
2023-12-30 Luigi Scarso <luigi.scarso@gmail.com>
- * Fixed allocation of the buffer for the file extension.
- * Fixed position of verbatim_written in mpxout.w
+ * Interval arithmetic: Fixed allocation of the buffer for the file extension.
+ * Interval arithmetic: Fixed position of verbatim_written in mpxout.w
+
+2023-09-17 Luigi Scarso <luigi.scarso@gmail.com>
+ * Interval arithmetic: mp.w: Fixed a buffer overflow.
+ * Interval arithmetic: decContext.{c,h}, decNumber.{c,h}, decNumberLocal.h: Convert newline from CRLF to LF (thanks to TANAKA Takuji).
2023-01-19 Luigi Scarso <luigi.scarso@gmail.com>
* MetaPost: svg->dx, svg->dy are now double (better precision) .
+2022-11-06 Luigi Scarso <luigi.scarso@gmail.com>
+ * Fixed the value of the clip-path attribute for the svg output.
+
+
+2022-09-20 Luigi Scarso <luigi.scarso@gmail.com>
+ * Interval arithmetic: code for remainder (work in progress).
+
+
2022-09-13 Luigi Scarso <luigi.scarso@gmail.com>
* Interval arithmetic: new primitives interval_get_left_endpoint,
interval_get_right_endpoint, interval_set.
@@ -24,6 +45,8 @@
2022-09-01 Luigi Scarso <luigi.scarso@gmail.com>
* Interval arithmetic: mpost compiles without errors.
+2022-08-25 Luigi Scarso <luigi.scarso@gmail.com>
+ * Interval arithmetic: support for interval arithmetic. Initial commit
2022-07-31 Luigi Scarso <luigi.scarso@gmail.com>
* MetaPost: Working on the file extension (work in progress).
@@ -44,7 +67,6 @@
* mp.w: MetaPost 2.02 (twice).
2022-01-10 Karl Berry <karl@freefriends.org>
-
* am/libmplib.am,
* am/mplib.am: do not silence tangle-sh.
diff --git a/source/texk/web2c/mplibdir/NEWS b/source/texk/web2c/mplibdir/NEWS
new file mode 100644
index 0000000000000000000000000000000000000000..32606d23b09f26a7a4dae83bafa07a35b2821956
--- /dev/null
+++ b/source/texk/web2c/mplibdir/NEWS
@@ -0,0 +1,1630 @@
+
+This file is public domain.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 2.10:
+----------------------------------------------------------------------
+* New interval number system based on MPFI. The implementation is somewhat experimental,
+ given the "unusual" nature of interval arithmetic.
+ The internal functions are almost verbatim copies of the MPFR-based binary system
+ (on which MPFI is based).
+* Several bugs fixes.
+
+
+----------------------------------------------------------------------
+What is new in MetaPost version 2.01:
+----------------------------------------------------------------------
+* It's a version needed to mark the patch mpx_copy_mpto.
+
+
+----------------------------------------------------------------------
+What is new in MetaPost version 2.0rc2:
+----------------------------------------------------------------------
+
+* Small cleanup of the code
+* Bump to version 2.0rc2: the current version is 2.00
+* Added the envelope primitives to mpman
+
+
+----------------------------------------------------------------------
+What is new in MetaPost version 2.0rc1:
+----------------------------------------------------------------------
+
+* Mainly fixes for wrong path directions, minor issues on tfm and png
+ backend. The version says "2.000" to keep the version as a valid
+ number.
+
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.9991:
+----------------------------------------------------------------------
+
+* Some issues fixed, but really this is in preparation of metapost 2.0.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.999:
+----------------------------------------------------------------------
+
+* The numbersystem 'binary' is now operational.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.902:
+----------------------------------------------------------------------
+
+* Fixed a crash in 'decimal' mode during choose_scale calculations.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.901:
+----------------------------------------------------------------------
+
+* Fixed a bug in 'decimal' mode that affected (among other things)
+ the directionpoint and bbox calculations.
+
+* Fixed a bug in 'decimal' mode calculation of sine / cosine that
+ affected the precision of the answer in situations where
+ 'numberprecision' was less than 34.
+
+* Updated the number parsing in 'decimal' mode to detect 'too precise'
+ input and optionally generate an error in that case (depends on
+ 'warningcheck')
+
+* Fixed a bug in the svg output where it could crash in 'decimal' mode.
+
+* Fixed a bug in the png output where it could get confused if there
+ was more than one text label
+
+* Fixed a bug in the png output for stroked paths
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.900:
+----------------------------------------------------------------------
+
+* Updated the embedded libraries, and a few build system fixes.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.890:
+----------------------------------------------------------------------
+
+* The numbersystem 'decimal' is now operational.
+
+* New internal: 'numberprecision', for use with 'the 'decimal' number
+ system. The (numeric) value expresses the desired calculation precision,
+ in decimal places.
+
+ system default min max
+ ============================
+ scaled 10 10 10 (assignment effectively ignored)
+ double 16 16 16 (assignment effectively ignored)
+ decimal 34 1 1000
+
+* Bug fix: in the 'double' numbersystem,
+
+ if X = scantokens decimal X:
+
+ will now always be true, because the 'decimal' operator now has
+ the same resolution as the scanning routine (which is two decimal
+ places more than in the previous release).
+
+* Fixed a bug in the handling of the / operator (wrong precendence).
+
+* Fixed a bug in arctime (did not handle negative values currectly).
+
+* Fixed TFM generation issues (various scale-related errors).
+
+* Fixed application crashes when there was no TEXMF tree to be found
+ anywhere.
+
+* It is no longer possible to assign to the 'numbersystem' internal.
+
+* There is a new definition of 'drawdot' in plain.mp.
+
+* PNG output did not output anything for draws of a single point.
+
+* Metapost now prints the full name of any preloaded files.
+
+* Fixed a bug in the handling of labels with embedded ascii zero(es).
+
+* Fixed handling of unknown command-line options, the reporting
+ on used libraries in the --version output, and the banner line.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.803:
+----------------------------------------------------------------------
+
+* Fixed a bug in the path tension handling that sometimes caused
+ distorted output.
+
+* A number of small alterations to the build system making it easier
+ to integrate metapost with W32TEX.
+
+* Fix the internal rounding functions in --numbersystem=double so that
+ they round exactly like in --numbersystem=scaled mode.
+
+* From Elie Roux: a fix to graph.mp to prevent log-scaled graphs with
+ large ranges from causing the "Value is too large" error.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.802:
+----------------------------------------------------------------------
+
+* Fixed a bug causing overly large characters in SVG output mode when
+ prologues != 3.
+
+* Removed a crash during free-ing of TFM metric data at the end of the
+ run.
+
+* Fixed a problem with colors in SVG output mode.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.801:
+----------------------------------------------------------------------
+
+* fixed an off-by-one error in the SVG output that prevented the last
+ font's glyphs from actually being output to the svg file under
+ prologues:=3;
+
+* fixed a bug in bbox calculations in that caused the max y to be set
+ based on the maximum x coordinate internal value instead of the
+ maximum y coordinate.
+
+* fixed a bug where metapost incorrectly produced a 'degenerate spec'
+ error.
+
+* build fixes for various platforms imported from TeXLive 2013, as
+ well as the latest kpathsea development etc.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.800:
+----------------------------------------------------------------------
+
+* A new string valued internal "outputformatoptions" is used by PNG
+ output mode to control the png file format. In the future, this
+ internal may also be used for options to the other output formats.
+
+ The syntax for "outputformatoptions" is a space-separated list of
+ settings. Individual settings are keyword+'='+value. The only
+ currently allowed ones are:
+ format=[rgba|rgb|graya|gray]
+ antialias=[none|fast|good|best]
+ No spaces are allowed on the left, nor on the right, of the equals
+ sign inside a setting.
+
+ The assignment that would match the compiled-in default setup is:
+ outputformatoptions := "format=rgba antialias=fast";
+ however, "outputformatoptions" is initially the empty string.
+
+ Some notes on the (new) PNG output formats:
+ - The 'rgb' and 'gray' subformats have a white background. The
+ 'rgba' and 'graya' subformats have a transparent background.
+ - Bitdepth is always 8.
+ - In all cases, the image is initially created in 8-bit RGB
+ mode. For 'gray' and 'graya', the RGB colors are reduced just
+ before the actual PNG file is written, using a standard rule:
+ g = 0.2126*r + 0.7152*g + 0.0722*b
+ - CMYK colors are always converted to RGB during generation of
+ the output image using:
+ r = 1 - (c+k>1 ? 1 : c+k);
+ g = 1 - (m+k>1 ? 1 : m+k);
+ b = 1 - (y+k>1 ? 1 : y+k);
+ - If you care about color conversions, you should be doing a
+ "within <pic>" loop inside "extra_endfig". The built-in
+ conversions are more of a fallback.
+
+* A new string-valued internal "outputfilename", which is set by
+ "shipout" to the value of the just created file name. Until the
+ first shipout has occurred, it is the empty string.
+
+
+* Fixed a number of bugs where Metapost loaded the default font map
+ file multiple times, resulting in lots of "fontmap entry for
+ `<fontname>' already exists, duplicates ignored" warnings.
+
+* The "glyph <> of <>" operation could crash on fonts with empty
+ subpaths in the charstrings.
+
+* Fixed a bug in the postscript encoding reader that caused a buffer
+ overflow (fatal error) for encoding files that do not end with a
+ newline.
+
+* Sped up png creation a bit by using smarter libpng options.
+
+* In the 'double' numbersystem, lots of precision was lost due to a bad
+ internal conversion of fractions to scaled values. This affected the
+ "rotated by", "directiontime", "sind" and "cosd" primitives, as well
+ as internal dependency calculations.
+
+* In the 'double' numbersystem, an internal rounding error caused
+ "directiontime" to return bad results for requests near zero.
+
+* There was a big scaling miscalculation while outputting glyphs in SVG
+ mode with "prologues:=3". The output labels were so big that they
+ fell completely outside of the generated image.
+
+* A problem resulting in 'This can't happen (endinput)' caused by a
+ missing "end" at the end of the run was fixed.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.790:
+----------------------------------------------------------------------
+
+* Lots of speedups.
+
+* Fixed bug in division expressions that started with a literal number.
+
+* A few problems with bad deallocations were solved.
+
+* A bug where after saving and redefinition of primitives, they later
+ were restored to 'undefined' instead of to their primitive meaning.
+
+* The "double" literal number parser now only accepts scientific
+ notation if the character following 'E' or 'e' is '+', '-', or
+ a digit.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.780:
+----------------------------------------------------------------------
+
+* The turningnumber calculation in 1.770 was bugged.
+
+* The picture export in 1.770 forgot to add trailing zeroes to the
+ log and term output channel resulting in rubbish output.
+
+* The arguments of the PS "dtransform" operator have been fixed
+ (was wrong since 1.750).
+
+* The warning limit in numbersystem=double mode is now exactly 2**52.
+
+* A bunch of obvious memory leaks fixed. Not all yet, but now the
+ MPlib seems to be usable even with many graphics.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.770:
+----------------------------------------------------------------------
+
+This is an alpha release for testing & debugging only!
+
+* The command line switch --numbersystem replaces --math.
+
+* Two new internals: numbersystem (string, read-only, either "scaled"
+ or "double" at the moment) and numberprecision (numeric, currently
+ a no-op).
+
+* There is a new bitmap backend:
+
+ outputformat:="png";
+
+ This backend uses cairo and libpng to generate PNG bitmap data.
+ The created PNG used RGB + Alpha, with anti-aliasing, at 72dpi,
+ and with a transparent background.
+
+* Associated with this, there are new internals "hppp" and "vppp",
+ that are used by the bitmap backend to decide on the scale of
+ the generated bitmap. Default value for both new internals is
+ "1.0", i.e. one pixel per Metapost point.
+
+ The internal names come from metafont.
+
+* There are two new primitives for use with picture item objects:
+
+ prescriptpart
+ postscriptpart
+
+* The C API has been extended to allow path control point resolution
+ without going through the Metapost input language, see
+ manual/mplibapi.tex for details.
+
+* The C API has been extended with a "math_mode" switch in the options
+ structure, and the memory size options as well as "ini_mode" have
+ been removed (the MPlib instance now always starts up in inimp mode)
+
+* The code for picture shipout now uses "double" for all floating point
+ values. This can give small differences in the actual output files in
+ traditional mode due to the required scaled -> double conversion, but
+ was necessary to support the new numerical backend code.
+
+* The Lua API internals have been updated to reflect the C API changes.
+
+* All known crashes in earlier versions of Metapost have been fixed.
+
+Known issues:
+
+* The manual is not up-to-date yet on the metapost input language
+ changes.
+
+* There are various memory leaks.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.750:
+----------------------------------------------------------------------
+
+This is an alpha release for testing & debugging only!
+
+* mpost now accepts --math=double as an argument. This switches the
+ internal arithmetic functions from using a scaled 32-bit data type
+ to 64-bit floating point.
+
+* With --math=double, the input scanner has been changed to allow
+ a := 1.0E20
+ as valid input format for a numerical value
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.504:
+----------------------------------------------------------------------
+
+* Small build system tweaks from TeXLive 2012.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.503:
+----------------------------------------------------------------------
+
+* String comparisons have been fixed, these were broken in previous
+ 1.50x versions.
+
+* verbatimtex ... etex processing had a horrible bug that is now
+ fixed.
+
+* A fix has been applied for a bug that made redeclared variable
+ subscript tags disappear.
+
+* The behavior of the %{<internal>} escape sequence in 'outputtemplate'
+ changed (but not that of the single-letter shortcuts). Internal
+ variables within %{...} are neither rounded nor zero-padded.
+
+* A very long list of improvements to the manual.
+
+* MetaPost now adheres to the openin_any / openout_any settings in
+ texmf.cnf
+
+* The 'prologues:=3 output' with embedded labels was unreliable,
+ especially when the resulting eps was included into a TeX document
+ via dvips.
+
+* 'newinternal numeric' has been fixed, it generated an error in
+ metapost 1.211 and earlier 1.50x versions.
+
+* Label regeneration sometimes failed to run when the file time stamps
+ were close together.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.502:
+----------------------------------------------------------------------
+
+* New build system and kpathsea imported from TeX Live.
+
+* Various bugfixes.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.501:
+----------------------------------------------------------------------
+
+* The maximum number of variable instances has increased from approx.
+ 33 million (2^25-1) to 2 billion (2^31-1).
+
+* New build system and kpathsea imported from TeX Live.
+
+* Many small bugfixes to 1.500.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.500:
+----------------------------------------------------------------------
+
+* Actual memory dump files do not exist any more. --mem=<MEM> and
+ all other methods of supplying a MEM file are now interpreted
+ somewhat like this pseudo-metapost-code:
+
+ begingroup;
+ let dump = end;
+ input MEM[.mp];
+ endgroup;
+
+ this process is supposed to be transparent besides the facto that
+ there is some extra terminal output and logging.
+
+* All memory is now allocated and freed dynamically. There are only
+ two remaining overflow errors(1):
+
+ "expansion depth" : this is a guard against infinite recursion,
+ the value is 10000.
+ "sizes per font" : this is maxed out for data-structure reasons,
+ the value is 32767.
+
+ from texmf.cnf, now only the "error_line", "half_error_line" and
+ "print_line settings" are used.
+
+ (1) but now you can reach the operating system limits, of course.
+
+* As this is an alpha release containing lots and lots of new code,
+ MetaPost starts up with the internal equivalent of 'loggingall;'
+ in effect. This results in log files that can help in debugging.
+
+* Expect bugs and (minor) memory leaks.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.212:
+----------------------------------------------------------------------
+
+* Small build system tweaks from TeXLive 2011.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.211:
+----------------------------------------------------------------------
+
+* In previous 1.20X versions, the 'glyph infont' operator did not handle
+ fonts with seac (old-style composite characters) properly.
+
+* Incorporated the latest versions of kpathsea and the build system
+ from TeXLive.
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.210:
+----------------------------------------------------------------------
+
+* In previous 1.20X versions, btex ... etex handling forgot to take
+ the passed directory location of input-ed files into account.
+
+* verbatimtex ... etex is now copied as is. Whitespace stripping
+ and appending of % no longer happen.
+
+* The mpost executable now always strips exactly one extension from
+ the jobname (unless explicit --jobname was given)
+
+----------------------------------------------------------------------
+What is new in MetaPost version 1.209:
+----------------------------------------------------------------------
+
+* Previous 1.20X mem files were architecture-dependent.
+
+* Metapost now uses getopt once again, which makes the commandline
+ handling compatible with pre-1.20X versions. However, the syntax
+ -sprologues=1 is now no longer supported (the space between -s
+ prologues is now mandatory).
+
+* On some systems, metapost would crash inside the function that prints
+ the 'fatal error' message.
+
+* The 'glyph infont' operator would sometimes cause crashes, and in
+ other cases it generated bad output.
+
+* There was a space missing in the generated output when mpprocset
+ was set. This was still legal PostScript, but it confused mptopdf.
+
+* In previous 1.20X versions, the font map file was read for each
+ figure that contained a label, resulting in lots of harmless
+ but scary warnings being reported.
+
+* The --debug switch is now documented in the command-line help.
+
+* The help text now mentions the metapost version.
+
+----------------------------------------------------------------------
+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.
+
+* Gábor 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
+* mpost no longer autoconverts r==g==b colors to grayscale in the
+ postscript output.
+
+----------------------------------------------------------------------
+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.