host-tools/imagetool/imagetool.py

   1 #!/usr/bin/python
   2 """
   3  Generate an image from a png which can be used by guilib.
   4
   5  Copyright (C) 2009 Daniel Mack <daniel@caiaq.de>
   6
   7  This program is free software: you can redistribute it and/or modify
   8  it under the terms of the GNU General Public License as published by
   9  the Free Software Foundation, either version 3 of the License, or
  10  (at your option) any later version.
  11
  12  This program is distributed in the hope that it will be useful,
  13  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  GNU General Public License for more details.
  16
  17  You should have received a copy of the GNU General Public License
  18  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 """
  20
  21 import gd
  22 import sys
  23 import struct
  24
  25 def usage():
  26         print "guilib image file generator"
  27         print "Usage: %s <image> <outfilename> <imagename>" % (sys.argv[0])
  28         print "This tool will output a 'static struct guilib_image' to <outfile>"
  29         print "containing the pixel information from <imagefile>. The struct will"
  30         print "be named <imagename>."
  31         print "All paramters are mandatory."
  32         sys.exit(1)
  33
  34 try:
  35         imagefile = sys.argv[1]
  36         outfile = sys.argv[2]
  37         imagename = sys.argv[3]
  38 except:
  39         usage()
  40
  41
  42 bit = 0
  43 outbyte = 0
  44 count = 0
  45
  46 try:
  47         im = gd.image(imagefile)
  48         (w, h) = im.size()
  49
  50         out =  "static struct guilib_image %s = {\n" % (imagename)
  51         out += "\t.width = %d,\n" % (w)
  52         out += "\t.height = %d,\n" % (h)
  53         out += "\t.data = {\n"
  54         out += "\t\t"
  55
  56         for n in range (0, w * h):
  57                 pixel = im.getPixel((n % w, n / w))
  58                 bit = n % 8;
  59
  60                 (r, g, b) = im.colorComponents(pixel)
  61                 color = (r + g + b) / 3
  62
  63                 if (color > 127):
  64                         outbyte |= 1 << (7 - bit);
  65
  66                 if bit == 7:
  67                         out += "0x%02x, " % outbyte
  68                         outbyte = 0
  69                         bit = 0
  70                         count += 1
  71
  72                         if (count % 16) == 0:
  73                                 out += "\n\t\t"
  74
  75         out += "}\n"
  76         out += "};\n"
  77
  78         if bit > 0:
  79                 out += struct.pack("B", outbyte)
  80
  81         #im.close()
  82
  83 except:
  84         print "unable to open bitmap file >%s<" % (imagefile)
  85         sys.exit(2)
  86
  87 f = open(outfile, 'w')
  88 print >> f, out
  89 f.close()
  90