conversion script for Image to source code conversion

Author: georgik

resources/convert-png-to-lvgl-rgb565a.py

@@ -0,0 +1,41 @@
+from PIL import Image
+import numpy as np
+import sys
+
+def rgb888_to_rgb565(r, g, b):
+    """Convert from RGB888 to RGB565."""
+    return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3)
+
+def convert_image_to_rgb565_a8_header(png_filepath, header_filepath):
+    """Convert a PNG image to RGB565 with Alpha format and save as a C header file in uint8_t array format."""
+    img = Image.open(png_filepath).convert('RGBA')
+    pixels = np.array(img)
+    height, width, _ = pixels.shape
+
+    with open(header_filepath, 'w') as header_file:
+        header_file.write("#ifndef IMAGE_H\n")
+        header_file.write("#define IMAGE_H\n\n")
+        header_file.write("#include <stdint.h>\n\n")
+        header_file.write(f"static const uint32_t image_width = {width};\n")
+        header_file.write(f"static const uint32_t image_height = {height};\n")
+        header_file.write("static const uint8_t image_data[] = {\n")
+
+        for y in range(height):
+            for x in range(width):
+                r, g, b, a = pixels[y, x]
+                rgb565 = rgb888_to_rgb565(r, g, b)
+                # Write RGB565 in two parts (high byte, low byte) and then Alpha
+                header_file.write(f"    0x{rgb565 >> 8:02X}, 0x{rgb565 & 0xFF:02X}, 0x{a:02X},")
+            header_file.write("\n")
+
+        header_file.write("};\n\n")
+        header_file.write("#endif // IMAGE_H\n")
+
+if __name__ == "__main__":
+    if len(sys.argv) != 3:
+        print("Usage: python script.py input.png output_image.h")
+        sys.exit(1)
+
+    png_filepath = sys.argv[1]
+    header_filepath = sys.argv[2]
+    convert_image_to_rgb565_a8_header(png_filepath, header_filepath)