cfdg - image generator based on context-free grammars

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

       This manual page was written by Bram Senders <bram@luon.net>, for the Debian project (but may be used  by
       others).

3.3.1                                              2020-04-04                                     CONTEXTFREE(1)

       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.  Cfdg files can also be animated. The output can either be PNG files of individual frames or as
       a  QuickTime  .mov  file.  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/--outputtemplate option  or  -C/--check  option  is
       used.   If  the  --display  option is specified and there is no output file then the output is saved in a
       temporary file. Note that the output mode (PNG, SVG, or MOV) is not detected depending on  the  specified
       extension, but must be explicitly set using the -V/--svg or -Q/--quicktime option.

       cfdg - image generator based on context-free grammars

       All command-line options consist of a single letter, and an optional argument. Longer "GNU-style" options
       exist as well. A summary of options supported by cfdg is included below.

       -wWIDTH,--width=WIDTH
              Set width of the output image in pixels (for PNG) or millimeters (for SVG) (default: 500).

       -hHEIGHT,--height=HEIGHT
              Set height of the output image in pixels (for PNG) or millimeters (for SVG) (default: 500).

       -sSIZE,--size=SIZE
              Set  both width and height of the output image in pixels (for PNG) or millimeters (for SVG) to the
              same value.

       -sWIDTHxHEIGHT,--size=WIDTHxHEIGHT
              Set both width and height of the output image in pixels (for PNG) or millimeters (for SVG).

       -TSIZE,--tile=SIZE
              Multiply both width and height of the tiled output image by the same amount.

       -TWIDTHxHEIGHT,--tile=WIDTHxHEIGHT
              Multiply both width and height of the tiled output image by the given amounts.

       -mMAXSHAPES,--maxshapes=MAXSHAPES
              Set the maximum number of shapes rendered (default: no maximum).

       -xMINIMUMSIZE,--minimumsize=MINIMUMSIZE
              Set the minimum size for a shape to be rendered in pixels/mm (default: 0.3).

       -bBORDERSIZE,--bordersize=BORDERSIZE
              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.

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

       -DNAME=VALUE
              Declare a variable, configuration, or function. Any declaration that can be made at  global  scope
              can  be  entered  at  the  command  line  with this option. Command line declarations override any
              global-scope declarations in the cfdg file with the same name.  Note  that  function  declarations
              require a space-delimited type identifier in front, so quotes would be required to force the shell
              to group the function declaration parts as one entity.

       -oNAMETEMPLATE,--outputtemplate=NAMETEMPLATE
              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 %.

       -aNUM,--animate=NUM
              Generate NUM animation frames at 15 fps.

       -aTIMExFPS,--animate=TIMExFPS
              Generate TIME x FPS animation frames at the specified fps.

       -fFRAME,--frame=FRAME
              Generate animation FRAME only.

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

       -V,--svg
              Generate SVG (vector) output.

       -Q,--quicktime
              Generate Quicktime movie output.

       --prores
              Generate Quicktime movie output using the ProRes codec instead of the H.264 codec.

       --display=DISPLAYEXECUTABLE
              Display output with specified program.

       -c,--crop
              Crop image output.

       -q,--quiet
              Quiet mode; suppress non-error output.

       -C,--check
              Check the syntax of the cfdg file, then exit.

       -t,--time
              Time output; output the time taken to render the cfdg file.

       -d,--cleanup
              Delete old temporary files.

       -P,--paramdebug
              Enable debug mode to test if all parameter blocks are deallocated.

       -?,--help
              Show summary of options.

       More information can be found on the Context Free website, at https://www.contextfreeart.org/index.html

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