52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
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#!/usr/bin/env python3
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"""Convert a PNG to a prefixed RGBA8888 C array for DSK kernel embedding.
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Usage: python png_to_rgba_prefixed.py <input.png> <output.c> <prefix>
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Output symbols:
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static const int <prefix>_w / <prefix>_h / <prefix>_rgba[]
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"""
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import sys
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from PIL import Image
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# Cap so embedded arrays stay small relative to typical 1024x768 GOP mode
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MAX_W, MAX_H = 1000, 700
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def main():
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if len(sys.argv) != 4:
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print(f"Usage: {sys.argv[0]} <input.png> <output.c> <prefix>", file=sys.stderr)
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sys.exit(1)
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src_path, dst_path, prefix = sys.argv[1], sys.argv[2], sys.argv[3]
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img = Image.open(src_path).convert("RGBA")
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if img.width > MAX_W or img.height > MAX_H:
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scale = min(MAX_W / img.width, MAX_H / img.height)
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img = img.resize((max(1, round(img.width * scale)),
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max(1, round(img.height * scale))),
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Image.LANCZOS)
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w, h = img.size
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raw = img.tobytes() # RGBA byte order
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with open(dst_path, "w", encoding="utf-8") as f:
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f.write(f"/* Auto-generated from {src_path} - RGBA8888 pixel data */\n")
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f.write(f"/* DO NOT EDIT. Regenerate via: python png_to_rgba_prefixed.py {src_path} {dst_path} {prefix} */\n\n")
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f.write(f"static const int {prefix}_w = {w};\n")
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f.write(f"static const int {prefix}_h = {h};\n")
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f.write(f"static const unsigned char {prefix}_rgba[] = {{\n")
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bytes_per_row = w * 4
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for y in range(h):
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row_start = y * bytes_per_row
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row_data = raw[row_start:row_start + bytes_per_row]
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hex_vals = [f"0x{b:02x}" for b in row_data]
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f.write(" " + ", ".join(hex_vals) + ",\n")
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f.write("};\n")
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total = w * h * 4
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print(f"[png_to_rgba_prefixed] {src_path} -> {dst_path}: {w}x{h}, {total} bytes")
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if __name__ == "__main__":
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main()
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