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minedmap: skip generation steps when the inputs are unchanged

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This commit is contained in:
Matthias Schiffer 2023-07-31 00:23:06 +02:00
parent 6077138292
commit 80781c9c20
Signed by: neocturne
GPG key ID: 16EF3F64CB201D9C
4 changed files with 97 additions and 50 deletions
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42
src/bin/minedmap/tile_renderer.rs
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@ -1,4 +1,4 @@
use std::time::SystemTime;
use std::path::Path;
use anyhow::{Context, Result};
@ -19,12 +19,8 @@ impl<'a> TileRenderer<'a> {
TileRenderer { config }
}
fn load_region(&self, coords: TileCoords) -> Result<(ProcessedRegion, SystemTime)> {
let processed_path = self.config.processed_path(coords);
let timestamp = fs::modified_timestamp(&processed_path)?;
let region =
storage::read(&processed_path).context("Failed to load processed region data")?;
Ok((region, timestamp))
fn load_region(processed_path: &Path) -> Result<ProcessedRegion> {
storage::read(processed_path).context("Failed to load processed region data")
}
fn render_chunk(image: &mut image::RgbaImage, coords: ChunkCoords, chunk: &ProcessedChunk) {
@ -64,7 +60,22 @@ impl<'a> TileRenderer<'a> {
fn render_tile(&self, coords: TileCoords) -> Result<()> {
const N: u32 = (BLOCKS_PER_CHUNK * CHUNKS_PER_REGION) as u32;
let processed_path = self.config.processed_path(coords);
let processed_timestamp = fs::modified_timestamp(&processed_path)?;
let output_path = self.config.tile_path(TileKind::Map, 0, coords);
let output_timestamp = fs::read_timestamp(&output_path, FILE_META_VERSION);
if Some(processed_timestamp) <= output_timestamp {
println!(
"Skipping unchanged tile {}",
output_path
.strip_prefix(&self.config.output_dir)
.expect("tile path must be in output directory")
.display(),
);
return Ok(());
}
println!(
"Rendering tile {}",
@ -74,15 +85,20 @@ impl<'a> TileRenderer<'a> {
.display(),
);
let (region, timestamp) = self.load_region(coords)?;
let region = Self::load_region(&processed_path)?;
let mut image = image::RgbaImage::new(N, N);
Self::render_region(&mut image, &region);
fs::create_with_timestamp(&output_path, FILE_META_VERSION, timestamp, |file| {
image
.write_to(file, image::ImageFormat::Png)
.context("Failed to save image")
})
fs::create_with_timestamp(
&output_path,
FILE_META_VERSION,
processed_timestamp,
|file| {
image
.write_to(file, image::ImageFormat::Png)
.context("Failed to save image")
},
)
}
pub fn run(self, regions: &[TileCoords]) -> Result<()> {