const func PRIMITIVE_WINDOW: readPpm (inout file: ppmFile)

Reads a PPM (portable pixmap) image file into a pixmap.

Parameters:

ppmFile - File that contains a PPM image.

Returns:

A pixmap with the PPM image, or PRIMITIVE_WINDOW.value if the file does not contain a PPM magic number.

Raises:

RANGE_ERROR - The file is not in the PPM file format.

const func PRIMITIVE_WINDOW: readPpm (in string: ppmFileName)

Reads a PPM file with the given ppmFileName into a pixmap.

Parameters:

ppmFileName - Name of the PPM file.

Returns:

A pixmap with the PPM image, or PRIMITIVE_WINDOW.value if the file cannot be opened or does not contain a PPM magic number.

Raises:

RANGE_ERROR - The file is not in the PPM file format.

const func string: str (in PRIMITIVE_WINDOW: pixmap, PPM)

Converts a pixmap into a string in PPM format.

Parameters:

pixmap - Pixmap to be converted.

Returns:

a string with data in PPM format.