From 4f6910c131cda52b187f2caa42c9cf2ce0885a5d Mon Sep 17 00:00:00 2001
From: Victor Oliveira <rhapsodyv@gmail.com>
Date: Sun, 14 Mar 2021 14:14:09 -0300
Subject: [PATCH] Script to generate Marlin TFT Images (#21340)

---
 buildroot/share/scripts/gen-tft-image.py | 64 ++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 buildroot/share/scripts/gen-tft-image.py

diff --git a/buildroot/share/scripts/gen-tft-image.py b/buildroot/share/scripts/gen-tft-image.py
new file mode 100644
index 0000000000..d89245fea4
--- /dev/null
+++ b/buildroot/share/scripts/gen-tft-image.py
@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+#
+# Marlin 3D Printer Firmware
+# Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+#
+# Based on Sprinter and grbl.
+# Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+# Generate Marlin TFT Images from bitmaps/PNG/JPG
+
+import sys,re,struct
+from PIL import Image,ImageDraw
+
+def image2bin(image, output_file):
+	if output_file.endswith(('.c', '.cpp')):
+		f = open(output_file, 'wt')
+		is_cpp = True
+		f.write("const uint16_t image[%d] = {\n" % (image.size[1] * image.size[0]))
+	else:
+		f = open(output_file, 'wb')
+		is_cpp = False
+	pixs = image.load()
+	for y in range(image.size[1]):
+		for x in range(image.size[0]):
+			R = pixs[x, y][0] >> 3
+			G = pixs[x, y][1] >> 2
+			B = pixs[x, y][2] >> 3
+			rgb = (R << 11) | (G << 5) | B
+			if is_cpp:
+				strHex = '0x{0:04X}, '.format(rgb)
+				f.write(strHex)
+			else:
+				f.write(struct.pack("B", (rgb & 0xFF)))
+				f.write(struct.pack("B", (rgb >> 8) & 0xFF))
+		if is_cpp:
+			f.write("\n")
+	if is_cpp:
+		f.write("};\n")
+	f.close()
+
+if len(sys.argv) <= 2:
+	print("Utility to export a image in Marlin TFT friendly format.")
+	print("It will dump a raw bin RGB565 image or create a CPP file with an array of 16 bit image pixels.")
+	print("Usage: gen-tft-image.py INPUT_IMAGE.(png|bmp|jpg) OUTPUT_FILE.(cpp|bin)")
+	print("Author: rhapsodyv")
+	exit(1)
+
+output_img = sys.argv[2]
+img = Image.open(sys.argv[1])
+image2bin(img, output_img)