Image operations

1use oa::image::decode_file as decode_image;
2use oa::render::{blit, clear, save_texture_file, texture_from_image};
3use oa::{Engine, ImageFormat, Result};
4use std::path::PathBuf;
5
6fn main() -> Result<()> {
7	let args: Vec<String> = std::env::args().collect();
8	let default_input = oa::Path::asset_rel("image/coverMl.jpg");
9	let in_path: PathBuf = args
10		.get(1)
11		.map(PathBuf::from)
12		.unwrap_or(default_input.into());
13	let out_path: PathBuf = args
14		.get(2)
15		.map(PathBuf::from)
16		.unwrap_or_else(|| PathBuf::from("/tmp/oa_viewport_batch.png"));
17
18	// ── Engine bring-up — headless (pure compute) ─────────────────────────────
19	// No surface, no VK_KHR_swapchain.  Any GPU admitted by the driver works.
20	let engine = Engine::builder().build()?;
21
22	eprintln!(
23		"tu_viewer_image_headless: {} → {}",
24		in_path.display(),
25		out_path.display()
26	);
27
28	// ── Producer: decode a semantic image, then lower it to a Texture ────────
29	let image = decode_image(&engine, &in_path, ImageFormat::Rgba)?;
30	let tex = texture_from_image(&image)?;
31
32	// ── Sink: save to file (readback + encode + write) ────────────────────────
33	save_texture_file(&tex, &out_path, 90)?;
34	println!(
35		"OK: {}×{}  {} → {}",
36		tex.width(),
37		tex.height(),
38		in_path.display(),
39		out_path.display()
40	);
41
42	// ── Smoke: blit (GPU copy — should round-trip to original) ───────────────
43	let blit_path = PathBuf::from("/tmp/oa_viewport_batch_blit.png");
44	let clone = blit(&tex)?;
45	save_texture_file(&clone, &blit_path, 90)?;
46	println!("OK: Blit → {}", blit_path.display());
47
48	// ── Smoke: clear (solid red) ──────────────────────────────────────────────
49	let clear_path = PathBuf::from("/tmp/oa_viewport_batch_clear.png");
50	let red = clear(&clone, oa::Color::new(0.95, 0.10, 0.10, 1.0))?;
51	save_texture_file(&red, &clear_path, 90)?;
52	println!("OK: clear(red) → {}", clear_path.display());
53
54	Ok(())
55}
56