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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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49
src/bin/minedmap/region_processor.rs
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@ -66,43 +66,46 @@ impl<'a> RegionProcessor<'a> {
}
fn save_region(
&self,
coords: TileCoords,
path: &Path,
processed_region: &ProcessedRegion,
timestamp: SystemTime,
) -> Result<()> {
let output_path = self.config.processed_path(coords);
storage::write(&output_path, processed_region, FILE_META_VERSION, timestamp)
storage::write(path, processed_region, FILE_META_VERSION, timestamp)
}
fn save_lightmap(
&self,
coords: TileCoords,
path: &Path,
lightmap: &image::GrayAlphaImage,
timestamp: SystemTime,
) -> Result<()> {
fs::create_with_timestamp(
&self.config.tile_path(TileKind::Lightmap, 0, coords),
FILE_META_VERSION,
timestamp,
|file| {
lightmap
.write_to(file, image::ImageFormat::Png)
.context("Failed to save image")
},
)
fs::create_with_timestamp(path, FILE_META_VERSION, timestamp, |file| {
lightmap
.write_to(file, image::ImageFormat::Png)
.context("Failed to save image")
})
}
/// Processes a single region file
fn process_region(&self, path: &Path, coords: TileCoords) -> Result<()> {
const N: u32 = (BLOCKS_PER_CHUNK * CHUNKS_PER_REGION) as u32;
println!("Processing region r.{}.{}.mca", coords.x, coords.z);
let mut processed_region = ProcessedRegion::default();
let mut lightmap = image::GrayAlphaImage::new(N, N);
let timestamp = fs::modified_timestamp(path)?;
let input_timestamp = fs::modified_timestamp(path)?;
let output_path = self.config.processed_path(coords);
let output_timestamp = fs::read_timestamp(&output_path, FILE_META_VERSION);
let lightmap_path = self.config.tile_path(TileKind::Lightmap, 0, coords);
let lightmap_timestamp = fs::read_timestamp(&lightmap_path, FILE_META_VERSION);
if Some(input_timestamp) <= output_timestamp && Some(input_timestamp) <= lightmap_timestamp
{
println!("Skipping unchanged region r.{}.{}.mca", coords.x, coords.z);
return Ok(());
}
println!("Processing region r.{}.{}.mca", coords.x, coords.z);
minedmap::io::region::from_file(path)?.foreach_chunk(
|chunk_coords, data: world::de::Chunk| {
@ -125,8 +128,12 @@ impl<'a> RegionProcessor<'a> {
},
)?;
self.save_region(coords, &processed_region, timestamp)?;
self.save_lightmap(coords, &lightmap, timestamp)?;
if Some(input_timestamp) > output_timestamp {
Self::save_region(&output_path, &processed_region, input_timestamp)?;
}
if Some(input_timestamp) > lightmap_timestamp {
Self::save_lightmap(&lightmap_path, &lightmap, input_timestamp)?;
}
Ok(())
}