site_scons/site_tools/Dia2Png.py

   1 import os
   2 import SCons.Builder, SCons.Action
   3
   4 def dia_getSize(env,source):
   5     size = None
   6     for line in os.popen(env['DIACOM']+" -e /proc/self/fd/1 -t eps "+str(source[0]),"r"):
   7         if line.startswith("%%BoundingBox:"):
   8             size=map(int,line.split()[3:])
   9             break
  10     return size
  11
  12 def dia2png_generator(source, target, env, for_signature):
  13     if for_signature:
  14         return "$DIACOM -t png -s $DIA2PNGDPI,$DIA2PNGMAXWIDTH $TARGET $SOURCE"
  15     size = dia_getSize(env,source)
  16     if not size: return None;
  17     size[0] = size[0]*int(env['DIA2PNGDPI'])/72
  18     size[1] = size[1]*int(env['DIA2PNGDPI'])/72
  19     if size[0] > env['DIA2PNGMAXWIDTH']:
  20         size[1] = size[1]*env['DIA2PNGMAXWIDTH']/size[0]
  21         size[0] = env['DIA2PNGMAXWIDTH']
  22     return SCons.Action.Action("$DIACOM -t png -s %dx%d -e $TARGET $SOURCE" % tuple(size))
  23
  24 Dia2Png = SCons.Builder.Builder(suffix = ".png",
  25                                 src_suffix = ".dia",
  26                                 generator = dia2png_generator,
  27                                 single_source = 1)
  28
  29 def generate(env):
  30     env['BUILDERS']['Dia2Png'] = Dia2Png
  31     env['DIACOM'] = "dia"
  32     env['DIA2PNGDPI'] = 115
  33     env['DIA2PNGMAXWIDTH'] = 800
  34
  35 def exists(env):
  36     return env.Detect("dia")