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NEWS/Changelog

0.1-8   2022-11-29
    o   minor change to avoid protect and registration warnings

0.1-7   2013-12-03
    o   fix endianness issue in writePNG() on big-endian machines
        when using nativeRaster

0.1-6   2013-07-02
    o   add support for text tags as well as R object metadata
        which is serialized into the text field
        (Thanks to Duncan Temple Lang for the idea)

0.1-5   2013-06-03
    o   add dpi and asp to writePNG() which allows to store the
        image resolution or aspect ratio (via the sPHYs PNG tag).

    o   add info flag to readPNG() which interprets some optional
        tags to return additional information such as dpi, asp
        or gamma if stored.

    o   try to detect local libpng via LOCAL_SOFT on Windows.
        Note that if you use LOCAL_SOFT, you are taking full
        responsibility over the libraries that png will be linked
        against.

0.1-4   2011-12-10
    o   writePNG() now supports binary connection as target and the
        default target is now raw()

0.1-3   2011-09-02
    o   remove debugging output

    o   added a missing call to png_set_interlace_handling to allow
        libpng to de-interlace images

    o   prevent warnings in readPNG() example for the windows device
        which is incapable of any transparency

0.1-2   2011-01-19
    o   support raw array as input to writePNG (RGBA only)

    o   do not truncate 16-bit images in readPNG() if the resulting
        output is not nativeRaster

    o   Windows binary on RForge has been updated to libpng 1.5.0

0.1-1   2010-04-06
    o   add tolerance to writePNG() to avoid shifts by one in
        color because of numerical representation of discretized
        values

    o   adapt to a last-minute change in R 2.11.0 from raster() to
        rasterImage()

    o   add support for more efficient nativeRaster format

0.1-0   2010-03-17
    o   first release on CRAN, supports readPNG() and writePNG()
        for files and raw vectors. readPNG() supports any input
        color type but will convert to 1-4 planes with 8-bit
        accuracy each. writePNG() will write out 1-4 planes
        8-bit each. writePNG() has currenty no provision for
        generating or stroring a palette.