#!/usr/local/bin/fontforge -lang=ff

if ( Strtol($version)<20080616 )
  Error( "Please upgrade to a more recent version of fontforge" )
endif

lines=[]
width = -1
height = -1
outfile = ""
pixelsize = 24
foundfont = 0

while ( $argc > 1 )
  if ( Strsub($1,0,1)!='-' )
    if ( foundfont )
      Print("Warning: Multiple font files have been given. Only the last will be used." )
    endif
    foundfont = 1
    Open($1,1)
  else
    temp = $1
    if ( Strsub(temp,1,2)=='-' )
      temp = Strsub(temp,1)
    endif

    if ( temp=="-width" && $argc>2 )
      shift
      width = Strtol($1)
    elseif ( temp=="-height" && $argc>2 )
      shift
      height = Strtol($1)
    elseif ( temp=="-pixelsize" && $argc>2 )
      shift
      pixelsize = Strtol($1)
    elseif ( temp=="-o" && $argc>2 )
      shift
      if ( outfile!="" )
        Print("Multiple output files given; only the last will be used")
      endif
      outfile = $1
    elseif ( temp=="-fontname" )
      lines = lines + [ pixelsize, 0 ]
    elseif ( temp=="-text" && $argc>2 )
      shift
      lines = lines + [ pixelsize, $1 ]
    elseif ( temp=="-version" )
      Print( "Version 1.0" )
return(0)
    else
      Print( "fontimage: [--version] [--width num] [--height num] [--pixelsize num] [--fontname] [--text str] [-o outputfilename] fontfile" )
      Print( " Produces an image containing representative glyphs of the font" )
      Print( " --width num  Specifies the number of pixels wide to make the" )
      Print( "    output image. If this is omitted (or specified as -1) then" )
      Print( "    the image will be made as wide as it needs to be." )
      Print( " --height num Specifies the number of pixels high to make the" )
      Print( "    output image. If this is omitted (or specified as -1) then" )
      Print( "    the image will be made as high as it needs to be." )
      Print( " --fontname   Include the fontname as a line of text." )
      Print( " --text str   Specifies a line of text to be printed on the image." )
      Print( "    This may be specified multiple times to get multiple lines." )
      Print( "    If this is omitted fontimage will chose a default set of strings" )
      Print( "    based on what characters it thinks are likely to be interesting." )
       Print( " --pixelsize num  Specifies the size at which the next piece(s) of" )
      Print( "    text will be printed. This may also be specified multiple times." )
      Print( " --o outputfilename  Specifies the name of the output image file." )
      Print( "    It must have an extension of either '.png' or '.bmp'." )
      Print( "    The image format will be determined by the extension." )
      Print( "    If omitted fontimage will chose a filename based on the font name." )
      Print( "    (png files are only supported if fontforge were compiled with png" )
      Print( "     support and has access to a png library)" )
return( 0 )
    endif
  endif
  shift
endloop

if ( !foundfont )
  Error( "You must specify a font." )
endif

if ( SizeOf(lines)==0 )
# I used to have the script generate default lines, but have moved that logic
# into fontforge
  lines = [ pixelsize ];
else
  i=1;
  while ( i<SizeOf(lines))
    if ( TypeOf(lines[i])=="Integer" && lines[i]==0 )
      lines[i] = " " + $fontname + " ";
    endif
    i=i+2;
  endloop
endif

if ( outfile=="" )
  outfile = $fontname + ".png"
endif

FontImage(outfile,lines,width,height)
