V3.5 Update

Data/Utils/fb2png.py

@@ -0,0 +1,38 @@
+#!/usr/bin/python
+
+# Converts an RGB image to a framebuffer for the ST7789 display
+# The ST7789 display expects 16 bits (2 bytes) per pixel
+# encoded in RGB565 format (Least Significant Bit first).
+#
+# png2fb.py inputfile [outputfile]
+
+import sys
+from copy import deepcopy
+from PIL import Image
+
+def color(rgb565):
+    rgb565=int.from_bytes(rgb565,"little")
+    lsb = (rgb565 & 0b0000000011111111)<<8
+    msb = (rgb565 & 0b1111111100000000)>>8
+    rgb565=(lsb | msb)
+    red5 = rgb565 >> 11
+    green6 = (rgb565 >> 5) & 0b111111
+    blue5 = rgb565 & 0b11111
+    red8 = round(red5 / 31 * 255)
+    green8 = round(green6 / 63 * 255)
+    blue8 = round(blue5 / 31 * 255)
+    return red8, green8, blue8
+
+output= Image.new(mode="RGB", size=(480, 480))
+image="./out.bin"
+
+with open(image, "rb") as r:
+    for y in range(240):
+        for x in range(240):
+            data=r.read(2)
+            for y2 in range(2):
+                for x2 in range(2):
+                    output.putpixel((x*2+x2,y*2+y2),color(data))
+
+#output.show()
+output.save("out.png")