png_io, a C code which reads and writes files in the Portable Network Graphics (PNG) format.
The information on this web page is distributed under the MIT license.
png_io is available in a C version.
pbma_io, a C code which handles the ASCII PBM (Portable Bit Map) format.
pbmb_io, a C code which handles the binary PBM (Portable Bit Map) format.
pgma_io, a C code which handles the ASCII PGM (Portable Gray Map) format.
pgmb_io, a C code which handles the binary PGM (Portable Gray Map) format.
ppma_io, a C code which can read or write ASCII PPM (Portable Pixel Map) graphics files.
ppmb_io, a C code which can read or write binary PPM (Portable Pixel Map) graphics files.