-Add: add tool to extract real ICO file from DUNE2.ICO

tools/extracticon.py

@@ -0,0 +1,48 @@
+#!/usr/bin/python
+# vim: tabstop=4 shiftwidth=4 softtabstop=4 expandtab
+#
+# Extract ICONs from MZ/NE MS Windows executable file
+#
+
+from struct import *
+
+with open('../bin/data/DUNE2.ICO', 'rb') as content_file:
+    content = content_file.read()
+
+icon_header = {}
+icon_data = {}
+
+# RT_GROUP_ICON = 14 = 0x0e
+# RT_ICON = 3
+if content[0:2] == 'MZ':
+    newoffset, = unpack_from('<H', content, 0x3C)
+    if content[newoffset:newoffset+2] == 'NE':
+        resoffset, = unpack_from('<H', content, newoffset+0x24)
+        ressegcount, = unpack_from('<H', content, newoffset+0x34)
+        #print resoffset, ressegcount
+        rscAlignShift, = unpack_from('<H', content, newoffset+resoffset)
+        offset = newoffset+resoffset+2
+        while True:
+            rtTypeID, rtResourceCount, rtReserved = unpack_from('<HHI', content, offset)
+            if rtTypeID == 0:
+                break
+            offset = offset + 8
+            print 'resource type 0x%04x count %d :' % (rtTypeID, rtResourceCount)
+            for j in range(0, rtResourceCount):
+                rnOffset, rnLength, rnFlags, rnID, rnHandle, rnUsage = unpack_from('<HHHHHH', content, offset)
+                offset = offset + 12
+                realoffset = rnOffset << rscAlignShift
+                reallen = rnLength << rscAlignShift
+                print '  offset=0x%06x (0x%04x) len=%d (0x%04x) flags=%04x ID=%04x' % (realoffset, rnOffset, reallen, rnLength, rnFlags, rnID)
+                if rtTypeID == 0x800e:
+                    icon_header[rnID] = content[realoffset:realoffset+18] + '\x16\x00\x00\x00'
+                elif rtTypeID == 0x8003:
+                    icon_data[rnID] = content[realoffset:realoffset+reallen]
+
+for icon_id in icon_header.keys():
+    filename = '%04x.ICO' % icon_id
+    with open(filename, 'wb') as icon_file:
+        icon_file.write(icon_header[icon_id])
+        icon_file.write(icon_data[icon_id])
+        print '%s written' % filename
+