make_oled_pic.py: script can transform an image into correct format for oled-13xx...

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

diff --git a/examples/python/make_oled_pic.py b/examples/python/make_oled_pic.py
new file mode 100755 (executable)
index 0000000..85b3ca0
--- /dev/null
+++ b/examples/python/make_oled_pic.py
@@ -0,0 +1,74 @@
+#!/usr/bin/env python
+
+# Author: Brendan Le Foll <brendan.le.foll@intel.com>
+# Copyright (c) 2014 Intel Corporation.
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE
+
+from __future__ import print_function
+
+from PIL import Image
+import sys
+
+# Pixels are arranged in one byte for 8 vertical pixels and not addressed individually
+# We convert the image to greysacle and end up making it monochrome where we
+# consider that every pixel that is '40' is black.
+
+width = 128
+height = 64
+
+if len(sys.argv) != 2:
+  print('Please specify an image to use as the only argument')
+  exit(1)
+
+im = Image.open(sys.argv[1])
+im = im.convert('L').resize((width, height))
+
+data = list(im.getdata())
+
+byteblock = [0 for i in range(width)]
+widthblock = [list(byteblock) for i in range(int(height/8))]
+numblock = 0
+pixcount = 0
+i = 0
+
+# we split the list by width * 8, to create data chunks of 8rows
+datachunks=[data[x:x+(width*8)] for x in range(0, len(data), (width*8))]
+
+# grab every pixel of image (or datachunk)
+while i < len(widthblock):
+  pixcount = 0
+  for y in datachunks[i]:
+    xcoor = pixcount % width
+    ycoor = int(pixcount/width)
+    blknum = xcoor % len(widthblock)
+    blkycoor = ycoor
+
+    # 40 is what we consider 'black'
+    if y > 40:
+      widthblock[i][xcoor] |= (1 << blkycoor)
+
+    pixcount += 1
+  i += 1
+
+flatlist = [y for x in widthblock for y in x]
+
+carray = 'static uint8_t image[] = {\n' + ', '.join(str(x) for x in flatlist)
+print(carray + '\n};')