Image generator based on context-free grammars
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.
Set width of the output image in pixels (for PNG) or millimeters (for SVG) (default: 500).
Set height of the output image in pixels (for PNG) or millimeters (for SVG) (default: 500).
Set both width and height of the output image in pixels (for PNG) or millimeters (for SVG) to the same value.
Set both width and height of the output image in pixels (for PNG) or millimeters (for SVG).
Multiply both width and height of the tiled output image by the same amount.
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.
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 %.
Generate num animation frames at 15 fps (only possible using PNG output).
Generate time x fps animation frames at the specified fps (only possible using PNG output).
Zoom out during animation, when producing an animation using -a.
Generate SVG (vector) output.
Generate Quicktime movie output (not available in this Debian package).
Crop image output.
Quiet mode; suppress non-error output.
Check the syntax of the cfdg file, then exit.
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).