dvipng: Debug options

 
 7.2 Debug options
 =================
 
 The '-d' flag to dvipng helps in tracking down certain errors.  The
 parameter to this flag is an integer that tells what errors are
 currently being tracked.  To track a certain class of debug messages,
 simply provide the appropriate number given below; if you wish to track
 multiple classes, sum the numbers of the classes you wish to track.  To
 track all classes, you can use '-1'.
 
    Some of these debugging options are actually provided by Kpathsea
 (See(kpathsea)Debugging).
 
    The classes are:
 1
      Normal dvi op-codes
 2
      Virtual fonts
 4
      PK fonts
 8
      TFM files
 16
      Glyph rendering
 32
      FreeType calls
 64
      Encoding loads
 128
      Color specials
 256
      GhostScript specials
 512
      Kpathsea 'stat' calls
 1024
      Kpathsea hash table lookups
 2048
      Kpathsea path element expansion
 4096
      Kpathsea path searches