File Output

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

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 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; it generates an error on builds compiled without ImageMagick support.
--auto Determine file type automatically 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 Incremental Output
By default, ALE writes intermediate results periodically throughout the rendering process. This behavior can be disabled, however, so that output is written only after rendering is complete.
--inc Produce incremental output. [default] --no-inc Don't produce incremental output. Undefined Values
By default, ALE colors undefined values black. To assign nearest-neighbor colors to undefined pixels, the --def-nn option can be used.
--def-nn <R> Use nearest-neighbor defined values within radius <R>, zero outside. Default radius is 0.