v2.34.2

• With the newly introduced macros, \mplibgroup ... \endmplibgroup, users
  can define a transparency group or a normal form XObject from TeX side.
  The LaTeX environment mplibgroup is identical to this pair of macros.
  See the document for details.

• document: be more precise about the color effect of a transparency group

• remove trailing zeros from numeric objects to get smaller PDF

v2.34.1

• transparency group is available with plain format as well
• transparency group once used is reusable in the TeX code or in other MetaPost code chunks.

v2.34.0

• support transparency group with metafun format
• fix regarding default value in circular fading mode
• fix regarging the scope of graphics state

v2.33.1

• refactor the manual, including some minor items undocumented so far
• improve fading routine to get possibly smaller pdf file

v2.33.0

• provide a new metapost operator withfademethod and related macros,
  which make the color of an object gradiently transparent.
• fix spot-color shading routine to support user-defined colorspace

v2.32.4

• make the variable patterns local
• math.randomseed on plain TeX
• remove redundant code fullcircle scaled 0

v2.32.3

• coloured is a synonym of the option colored in pattern definition.

• fix a bug related to pdf page resources in dvi mode

• users can access the lua table containing mplib instances luamplib.instances,
  through which metapost variables are also easily accessible as documented in
  LuaTeX manual 11.2.8.4.

v2.32.2

fix matrix conversion between MP and PDF

v2.32.1

• for the sake of convenience, width and height values of tiling patterns will be written down into the log file.
• table type is allowed as well as string type for matrix and bbox options in pattern definition.
• metapost code such as rotated 30 slanted .2 is allowed as well as the string or table of numbers for the matrix option in pattern definition.
• as for the resources option in pattern definition, luamplib automatically includes the resources of the current page.
• luamplib does not log info even if there's no beginfig ... endfig.

v2.32.0

• \mppattern{<name>} ... \endmppattern defines a tiling pattern which can be used with withpattern operator to fill a closed path by replicating the tile horizontally and vertically. \begin{mppattern} ... \end{mppattern} is exactly the same as \mppattern ... \endmppattern. See luamplib manual for details.