img-ppm - Portable pixmap format (ppm)

       Copyright (c) 1995-2024 Jan Nijtmans <nijtmans@users.sourceforge.net>
       Copyright (c) 2002-2024 Andreas Kupries <andreas_kupries@users.sourceforge.net>
       Copyright (c) 2003-2024 Paul Obermeier <obermeier@users.sourceforge.net>

img-ppm                                                2.0                                          img-ppm(3tk)

packagerequireimg::ppm

       Like  all packages of Img it does not provide new commands, but extends the existing Tk command image, so
       that it supports files containing raster images in the Portable pixmap format  (ppm).  More  specifically
       img::ppm extends Tk's photo [https://www.tcl.tk/man/tcl9.0/TkCmd/photo.html] image type.

       The  name  of the new format handler is ppm.  This handler provides additional configuration options. See
       section Options for more detailed explanations.

       All of the above means that in a call like imagecreatephoto ?name? ?options?

       [1]    Image data in ppm format (options -data and -file) is detected automatically.

       [2]    The format name ppm is recognized by the option -format.

       In addition the value of option -format is treated as a list and may contain any of the  special  options
       listed in section Options.

       The package img::ppm is a sub-package of Img. It can be loaded as a part of the complete Img support, via
       packagerequireImg, or on its own, via packagerequireimg::ppm.

       img-ppm - Portable pixmap format (ppm)

       The handler provides the following options:

       -verbosebool
              This option is supported for reading and writing. Available since version 1.4.0.

              If  set  to  true,  additional  information  about the read or written image is printed to stdout.
              Default is false.

       -scanorderstring
              This option is supported for reading only. Available since version 1.4.0.

              Specify the scanline order of the input image.  Possible values: TopDown or BottomUp.  Default  is
              TopDown.

       -mindouble
              This option is supported for reading only. Available since version 1.4.0.

              Specify  the  minimum  pixel value to be used for mapping 16-bit input data to 8-bit image values.
              If not specified or negative, the minimum value found in the image data.

       -maxfloat
              This option is supported for reading only. Available since version 1.4.0.

              Specify the maximum pixel value to be used for mapping 16-bit input data to  8-bit  image  values.
              If not specified or negative, the maximum value found in the image data.

       -gammadouble
              This option is supported for reading only. Available since version 1.4.0.

              Specify  a  gamma  correction  to be applied when mapping 16-bit input data to 8-bit image values.
              Default is 1.0.

       -asciibool
              This option is supported for writing only. Available since version 1.4.0.

              If set to true, the file is written in PPM 8-bit ASCII format (P3).  Default is false, i.e.  write
              in PPM 8-bit binary format (P6).

       img, img-bmp, img-dted, img-flir, img-gif, img-ico, img-jpeg, img-pcx, img-pixmap, img-png, img-ppm, img-
       ps, img-raw, img-sgi, img-sun, img-tga, img-tiff, img-window, img-xbm, img-xpm

       This  handler  supports  the  PPM  (Truecolor) and PGM (Grayscale) image formats.  There are two types of
       PPM/PGM files: Binary and ASCII.  The values stored in PPM/PGM files can be unsigned  8-bit  or  unsigned
       16-bit values.

       •      Grayscale (PGM): 8-bit and 16-bit, 1 channel per pixel.

       •      Truecolor (PPM): 8-bit and 16-bit, 3 channels per pixel.

               Image             |     Read      |     Write     |
               type              | -file | -data | -file | -data |
               ---------------------------------------------------
               PGM  8-bit ASCII  | Yes   | Yes   | No    | No    |
               PGM  8-bit BINARY | Yes   | Yes   | No    | No    |
               PGM 16-bit ASCII  | Yes   | Yes   | No    | No    |
               PGM 16-bit BINARY | Yes   | Yes   | No    | No    |
               PPM  8-bit ASCII  | Yes   | Yes   | Yes   | Yes   |
               PPM  8-bit BINARY | Yes   | Yes   | Yes   | Yes   |
               PPM 16-bit ASCII  | Yes   | Yes   | No    | No    |
               PPM 16-bit BINARY | Yes   | Yes   | No    | No    |

       package require img::ppm?2.0?

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