cfdg (1)

cfdg [options] input.cfdg [output.png/svg]

Context Free is a system that produces images based on context-free grammars. cfdg is the command-line program to generate the actual images (in PNG or SVG format) from the input.cfdg file containing these grammars. If - is specified instead of an input file, the grammar is read from standard input. The output filename can be left out if the -o option is used. Note that the output mode (PNG or SVG) is not detected depending on the specified extension, but must be explicitly set using the -V option.

All command-line options consist of a single letter, and an optional argument. A summary of options supported by cfdg is included below.

-w width

Set width of the output image in pixels (for PNG) or millimeters (for SVG) (default: 500).

-h height

Set height of the output image in pixels (for PNG) or millimeters (for SVG) (default: 500).

-s size

Set both width and height of the output image in pixels (for PNG) or millimeters (for SVG) to the same value.

-s widthxheight

Set both width and height of the output image in pixels (for PNG) or millimeters (for SVG).

-T size

Multiply both width and height of the tiled output image by the same amount.

-T widthxheight

Multiply both width and height of the tiled output image by the given amounts.

-m maximum shapes amount

Set the maximum number of shapes rendered (default: no maximum).

-x minimum shape size

Set the minimum size for a shape to be rendered in pixels/mm (default: 0.3).

-b border size

Set the border size: -1 for a -8 pixel border, 0 for no border, 1 for an 8 pixel border, or 2 for a variable-sized border.

-v variation code

Set the variation code (default: random). This code determines what the final image will look like when the input contains non-deterministic rules.

-o filename

Set the output filename. In this filename, %f is replaced by the animation frame number (if any), %v and %V are replaced by the variation code (in lower or upper case, respectively), and %% is replaced by a literal %.

-a num

Generate num animation frames at 15 fps (only possible using PNG output).

-a timexfps

Generate time x fps animation frames at the specified fps (only possible using PNG output).

-z

Zoom out during animation, when producing an animation using -a.

-V

Generate SVG (vector) output.

-Q

Generate Quicktime movie output (not available in this Debian package).

-c

Crop image output.

-q

Quiet mode; suppress non-error output.

-C

Check the syntax of the cfdg file, then exit.

-t

Time output; output the time taken to render the cfdg file.

-?

Show summary of options.

More information can be found on the Context Free website, at http://contextfreeart.org/.

Context Free was written by Chris Coyne, John Horigan and Mark Lentczner.

This manual page was written by Bram Senders <[email protected]>, for the Debian project (but may be used by others).