ppmtowinicon(1)                                               General Commands Manual                                              ppmtowinicon(1)

NAME

       ppmtowinicon - convert 1 or more portable pixmaps into a Windows .ico file

SYNOPSIS

       ppmtowinicon [-andpgms] [-output output.ico] [ppmfiles...]

DESCRIPTION

       Reads one or more portable pixmaps as input.  Produces a Microsoft Windows .ico file as output.

       A Windows icon contains 1 or more images, at different resolutions and color depths.

       Microsoft recommends including at least the following formats in each icon (size and bits-per-pixel):

       16 x 16 - 4 bpp

       32 x 32 - 4 bpp

       48 x 48 - 8 bpp

       Default I/O is STDIN/STDOUT.

OPTIONS

       -andpgms
              If  this  option  is  given, every second file is read as an "and mask" to be used by windows for transparency data for the previous
              image. (These are set to fully opaque by default). The and mask is a PGM image, where any pixel with maxval intensity  means  opaque
              and  any  other pixel means not opaque. Note that as with all Netpbm programs, you may use a PBM file here and it will be used as if
              it were the equivalent PGM.

              The and mask is like an alpha mask, except for what it signifies in the "not opaque" areas. In the usual case, the foreground  image
              is  black in those areas, and in that case the areas are fully transparent -- the background shows through the icon. But in general,
              a not opaque pixel signifies that the background and foreground should be merged as follows: The intensities of the color components
              in the forgeground and background are represented as binary numbers, then corresponding bits of the background and foreground inten-
              sities are exlusive-or'ed together. So there is a sort of reverse video effect.

       -output output.ico
              File to write.  By default, the icon is written to stdout.

SEE ALSO

       winicontoppm(1), ppm(5)

AUTHOR

       Copyright (C) 2000 by Lee Benfield.

                                                                    22 May 2000                                                    ppmtowinicon(1)