From 7eecabd6205d42266894f2f72a09fb95f055925a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miloslav=20=C4=8C=C3=AD=C5=BE?= <tastyfish@seznam.cz>
Date: Mon, 3 Sep 2018 13:43:38 +0200
Subject: [PATCH] Add image convertor

---
 convert_png.py | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 convert_png.py

diff --git a/convert_png.py b/convert_png.py
new file mode 100644
index 0000000..fffa452
--- /dev/null
+++ b/convert_png.py
@@ -0,0 +1,32 @@
+# Convert png image to 256 palette image for Pokitto.
+#
+# author: Miloslav Ciz
+# license: CC0
+
+import sys
+from PIL import Image
+
+def rgbToIndex(r, g, b):
+  return (r & 0b00000111) | ((g & 0b00000111) << 3) | ((b & 0b00000011) << 6) 
+
+image = Image.open(sys.argv[1])
+pixels = image.load()
+
+sys.stdout.write("const unsigned char image[] =\n{  ")
+sys.stdout.write(str(image.size[0]) + ", " + str(image.size[1]) + " // width, height")
+
+count = 0
+
+for y in range(image.size[1]):
+  for x in range(image.size[0]):
+    if count % 14 == 0:
+      sys.stdout.write("\n  ");
+
+    p = pixels[x,y]
+
+    sys.stdout.write(",0x{:02x}".format(rgbToIndex(p[0] / 32, p[1] / 32, p[2] / 85)))
+
+    count += 1
+
+print("\n};")
+