51 lines
1.7 KiB
Rust
51 lines
1.7 KiB
Rust
use image::{ImageBuffer, Rgba};
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const TILE_PX: u32 = 16;
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const ROWS: &[(&str, u8)] = &[
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("assets/sky.png", 0), // air (transparent)
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("assets/grass_floor.png", 1), // grass
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("assets/dirt_floor.png", 2), // dirt
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("assets/rock_floor.png", 3), // rock
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("assets/bedrock_floor.png", 4), // bedrock
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("assets/sky.png", 5), // sky (transparent)
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("assets/dirt_wall.png", 6), // dirt_wall fixture
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("assets/rock_wall.png", 7), // rock_wall fixture
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("assets/bedrock_wall.png", 8), // bedrock_wall fixture
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("assets/log.png", 9), // log fixture
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("assets/leaves.png", 10), // leaves fixture
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];
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fn main() {
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let rows = ROWS.len() as u32;
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let mut combined: ImageBuffer<Rgba<u8>, Vec<u8>> =
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ImageBuffer::from_pixel(TILE_PX, TILE_PX * rows, Rgba([0, 0, 0, 0]));
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for (i, (path, _id)) in ROWS.iter().enumerate() {
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let y = i as u32 * TILE_PX;
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match image::open(path) {
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Ok(img) => {
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image::imageops::overlay(&mut combined, &img, 0, y as i64);
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println!("cargo:rerun-if-changed={}", path);
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}
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Err(e) => {
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eprintln!(
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"Warning: could not open {} — leaving row {} blank ({})",
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path, i, e
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);
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let mut row_pixels = combined.rows_mut();
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if let Some(row) = row_pixels.nth(i) {
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for px in row {
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*px = Rgba([255, 0, 255, 255]);
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}
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}
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}
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}
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}
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combined
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.save("assets/tileset.png")
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.expect("Failed to write assets/tileset.png");
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println!("cargo:rerun-if-changed=build.rs");
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}
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