PGMA_IO
Portable Gray Map (ASCII) Files
Read and Write Utilities

PGMA_IO is a C++ library which reads and writes files in the ASCII PGMA format for 2D grayscale graphics information.

There are many graphics programs, such as XV and GIMP, that can display images in this format, or translate them to other formats such as BMP, GIF, JPEG, MacPaint, X Window, and so on.

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Related Data and Programs:

PBMA_IO is a C++ library which handles the Portable Bit Map format.

PGMA is a data directory which contains examples of PGMA files.

PGMA_IO is available in a C++ version and a FORTRAN90 version and a MATLAB version.

PGMA_TO_PGMB is an executable C++ program which converts an ASCII PGM file to a binary PGM file.

PGMB_IO is a C++ library which handles the (binary) Portable Gray Map format.

PGMB_TO_PGMA is an executable C++ program which converts a binary PGM file to an ASCII PGM file.

PPMA_IO is a C++ library which handles the Portable Pixel Map format.

1. the NETPBM homepage.

Source Code:

• pgma_io.C, the source code;
• pgma_io.H, the include file for PGMA_IO;
• pgma_io.csh, commands to compile the source code;

Examples and Tests:

• pgma_io_prb.C, the sample calling program.
• pgma_io_prb.csh, commands to compile, link and run the sample calling program.
• pgma_io_prb_output.txt, the output file.

List of Routines:

• I4_MIN returns the smaller of two integers.
• PGMA_CHECK_DATA checks the data for an ASCII portable gray map file.
• PGMA_EXAMPLE sets up some data for an ASCII portable gray map file.
• PGMA_READ reads the header and data from an ASCII portable gray map file.
• PGMA_READ_DATA reads the data in an ASCII portable gray map file.
• PGMA_READ_HEADER reads the header of an ASCII portable gray map file.
• PGMA_READ_TEST tests the ASCII portable gray map read routines.
• PGMA_WRITE writes the header and data for an ASCII portable gray map file.
• PGMA_WRITE_DATA writes the data for an ASCII portable gray map file.
• PGMA_WRITE_HEADER writes the header of an ASCII portable gray map file.
• PGMA_WRITE_TEST tests the ASCII portable gray map write routines.

You can go up one level to the C++ source codes.