feat(tools): Add tool to convert images to header files

tools/imageconvert.py

+#!/usr/bin/env python
+
+from PIL import Image
+import sys
+
+if len(sys.argv) < 2:
+    print("Usage: %s <image file>" % sys.argv[0])
+    sys.exit(1)
+
+im = Image.open(sys.argv[1])
+
+out_name = '.'.join(sys.argv[1].split('.')[:-1])
+
+print out_name
+out = open(out_name + ".h", 'w')
+
+out.write("const unsigned char %s[] = {\n" % out_name.split('/')[-1])
+
+for x in range(im.size[1]):
+    for y in range(im.size[0]):
+        px = im.getpixel((y, x))
+
+        px16 = ((px[0] >> 3) << 11) | ((px[1] >> 2) << 5) | (px[2] >> 3)
+
+        px16h = (px16 & 0xFF00) >> 8
+        px16l = px16 & 0xFF
+
+        out.write("0x%02x, 0x%02x,\n" % (px16l, px16h))
+
+out.write("};\n")