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 os.popen(env['DIACOM']+" -e /proc/self/fd/1 -t eps "+str(source[0]),"r"):
  13         if line.startswith("%%BoundingBox:"):
  14             size=map(int,line.split()[3:])
  15             break
  16     return size
  17
  18 def dia2png_generator(source, target, env, for_signature):
  19     if for_signature:
  20         return "$DIACOM -t png -s $DIA2PNGDPI $TARGET $SOURCE"
  21     size = dia_getSize(env,source)
  22     if not size: return None;
  23     size[0] = size[0]*int(env['DIA2PNGDPI'])/72
  24     size[1] = size[1]*int(env['DIA2PNGDPI'])/72
  25     return env.Action("$DIACOM -t png -s %dx%d -e $TARGET $SOURCE" % tuple(size))
  26
  27 Dia2Png = SCons.Builder.Builder(suffix = ".png",
  28                                 src_suffix = ".dia",
  29                                 generator = dia2png_generator,
  30                                 single_source = 1)
  31
  32 def generate(env):
  33     env['BUILDERS']['Dia2Png'] = Dia2Png
  34     env['DIACOM'] = "dia"
  35     env['DIA2PNGDPI'] = 115
  36
  37 def exists(env):
  38     return env.Detect("dia")