1NEWS/Changelog 2 30.1-7 2013-12-03 4 o fix endianness issue in writePNG() on big-endian machines 5 when using nativeRaster 6 70.1-6 2013-07-02 8 o add support for text tags as well as R object metadata 9 which is serialized into the text field 10 (Thanks to Duncan Temple Lang for the idea) 11 12 130.1-5 2013-06-03 14 o add dpi and asp to writePNG() which allows to store the 15 image resolution or aspect ratio (via the sPHYs PNG tag). 16 17 o add info flag to readPNG() which interprets some optional 18 tags to return additional information such as dpi, asp 19 or gamma if stored. 20 21 o try to detect local libpng via LOCAL_SOFT on Windows. 22 Note that if you use LOCAL_SOFT, you are taking full 23 responsibility over the libraries that png will be linked 24 against. 25 26 270.1-4 2011-12-10 28 o writePNG() now supports binary connection as target and the 29 default target is now raw() 30 31 320.1-3 2011-09-02 33 o remove debugging output 34 35 o added a missing call to png_set_interlace_handling to allow 36 libpng to de-interlace images 37 38 o prevent warnings in readPNG() example for the windows device 39 which is incapable of any transparency 40 41 420.1-2 2011-01-19 43 o support raw array as input to writePNG (RGBA only) 44 45 o do not truncate 16-bit images in readPNG() if the resulting 46 output is not nativeRaster 47 48 o Windows binary on RForge has been updated to libpng 1.5.0 49 50 510.1-1 2010-04-06 52 o add tolerance to writePNG() to avoid shifts by one in 53 color because of numerical representation of discretized 54 values 55 56 o adapt to a last-minute change in R 2.11.0 from raster() to 57 rasterImage() 58 59 o add support for more efficient nativeRaster format 60 61 620.1-0 2010-03-17 63 o first release on CRAN, supports readPNG() and writePNG() 64 for files and raw vectors. readPNG() supports any input 65 color type but will convert to 1-4 planes with 8-bit 66 accuracy each. writePNG() will write out 1-4 planes 67 8-bit each. writePNG() has currenty no provision for 68 generating or stroring a palette. 69 70