image2array: add an image to C-array converter

projects/briey/vga/build/util/image2array/image2array.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+
+from PIL import Image
+import sys
+
+def convert_888_to_565(pixel):
+    red, green, blue = pixel
+    red >>= 3
+    green >>= 2
+    blue >>= 3
+
+    return (red << 11) | (green << 5) | (blue << 0)
+
+def generate_struct(imagedata, width):
+    imagedata = list(imagedata)
+    return ',\n'.join(
+            '\t{\n%s\n\t}' % (',\n'.join(
+                '\t\t0x%04x' % convert_888_to_565(pixel) for pixel in imagedata[i:i+width]))
+            for i in range(0, len(imagedata), width))
+
+def generate_array(image):
+    width, height = image.size
+    print("""#include <stdint.h>
+
+static uint16_t image[%d][%d] = {
+%s
+};""" % (width, height, generate_struct(image.getdata(), width)))
+
+generate_array(Image.open(sys.argv[1]))

projects/briey/vga/build/util/image2array/requirements.txt

@@ -0,0 +1 @@
+Pillow==7.0.0