satscons/Dia2Png.py

   1 """Dia2Png SCons Builder: Build a PNG file given a DIA file.
   2
   3 Support the specification of a scalefactor in the DIA2PNGDPI Environment variable.
   4
   5 """
   6
   7 import os
   8 import SCons.Builder
   9
  10 def dia_getSize(env,source):
  11     size = None
  12     for line in popen(env['DIACOM']+" -e /proc/self/fd/1 -t eps "+source[0],"r"):
  13         if line.startswith("%%BoundingBox:"):
  14             size=map(int,line.split()[4:])
  15     return size
  16
  17 def dia2png_generator(source, target, env, for_signature):
  18     if for_signature:
  19         return "$DIACOM -t png -s $DIA2PNGDPI $TARGET $SOURCE"
  20     size = dia_getSize(env,source)
  21     if not size: return None;
  22     size[0] = size[0]*72/int(env['DIA2PNGDPI'])
  23     size[1] = size[1]*72/int(env['$DIA2PNGDPI'])
  24     return env.Action("$DIACOM -t png -s %dx%d $TARGET $SOURCE" % size)
  25
  26 Dia2Png = SCons.Builder.Builder(suffix = ".png",
  27                                 src_suffix = ".dia",
  28                                 generator = dia2png_generator,
  29                                 single_source = 1)
  30
  31 def generate(env):
  32     env['BUILDERS']['Dia2Png'] = Dia2Png
  33     env['DIACOM'] = "dia"
  34     env['DIA2PNGDPI'] = 115
  35
  36 def exists(env):
  37     return 1