ALE File Output

File output options determine the format in which rendered images are written. Depending on the compilation options used, available file output options vary.

PPM Output

All builds of ALE support PPM output. PPM can be written in plain (ASCII) or raw (binary) format. If ALE has been built without ImageMagick support, or if the file type cannot be automatically determined by file extension, then raw PPM output is used by default.

--raw             Write raw PPM output
--plain           Write plain PPM output

Extension-based file type determination

If ALE has been built with ImageMagick support, then the output file type can be determined automatically by file extension. This is the default behavior for ImageMagick builds. The --auto flag explicitly specifies that the default behavior should be used. This flag generates an error on builds compiled without ImageMagick support.

--auto            Determine file type automatically

Output Color Depth

Output color depth of 8 or 16 bits of precision per color channel can be specified, for 24-bit or 48-bit color, respectively.

--8bpc            Write 8 bit per channel output [default]
--16bpc           Write 16 bit per channel output

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