utils: gen-shader-headers: Add a utility to generate headers from shaders

Two simple script to generate a header that contains GLSL shaders translated
to C arrays.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

utils/gen-shader-header.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2025, Bryan O'Donoghue.
+#
+# Author: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
+#
+# A python script which takes a list of shader files and converts into a C
+# header.
+#
+import sys
+
+try:
+    with open(sys.argv[2]) as file:
+        data = file.read()
+        data_len = len(data)
+
+        name = sys.argv[1].replace(".", "_")
+        name_len = name + "_len"
+
+        j = 0
+        print("unsigned char", name, "[] = {")
+        for ch in data:
+            print(f"0x{ord(ch):02x}, ", end="")
+            j = j + 1
+            if j == 16:
+                print()
+                j = 0
+        if j != 0:
+            print()
+        print("};")
+
+        print()
+        print(f"const unsigned int {name_len}={data_len};")
+
+except FileNotFoundError:
+    print(f"File {sys.argv[2]} not found", file=sys.stderr)
+except IOError:
+    print(f"Unable to read {sys.argv[2]}", file=sys.stderr)