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Improve bounds check, don't save variant unless it's been changed

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This commit is contained in:
asonix 2020-06-14 23:10:30 -05:00
parent 100a97a3f7
commit 84c10edd0e
2 changed files with 28 additions and 13 deletions
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8
src/main.rs
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@ -226,7 +226,13 @@ async fn serve(
};
debug!("Processing image");
let img = self::processor::process_image(chain, img).await?;
let (img, changed) = self::processor::process_image(chain, img).await?;
if !changed {
let stream = actix_fs::read_to_stream(original_path).await?;
return Ok(srv_response(stream, ext));
}
// perform thumbnail operation in a blocking thread
debug!("Exporting image");

33
src/processor.rs
View file

@ -18,7 +18,7 @@ pub(crate) trait Processor {
Self: Sized;
fn path(&self, path: PathBuf) -> PathBuf;
fn process(&self, img: DynamicImage) -> Result<DynamicImage, UploadError>;
fn process(&self, img: DynamicImage) -> Result<(DynamicImage, bool), UploadError>;
fn is_whitelisted(whitelist: Option<&HashSet<String>>) -> bool
where
@ -59,8 +59,8 @@ impl Processor for Identity {
path
}
fn process(&self, img: DynamicImage) -> Result<DynamicImage, UploadError> {
Ok(img)
fn process(&self, img: DynamicImage) -> Result<(DynamicImage, bool), UploadError> {
Ok((img, false))
}
}
@ -95,12 +95,12 @@ impl Processor for Thumbnail {
path
}
fn process(&self, img: DynamicImage) -> Result<DynamicImage, UploadError> {
fn process(&self, img: DynamicImage) -> Result<(DynamicImage, bool), UploadError> {
debug!("Thumbnail");
if img.in_bounds(self.0, self.0) {
Ok(img.thumbnail(self.0, self.0))
if img.width() > self.0 || img.height() > self.0 {
Ok((img.thumbnail(self.0, self.0), true))
} else {
Ok(img)
Ok((img, false))
}
}
}
@ -130,9 +130,13 @@ impl Processor for Blur {
path
}
fn process(&self, img: DynamicImage) -> Result<DynamicImage, UploadError> {
fn process(&self, img: DynamicImage) -> Result<(DynamicImage, bool), UploadError> {
debug!("Blur");
Ok(img.blur(self.0))
if self.0 > 0.0 {
Ok((img.blur(self.0), true))
} else {
Ok((img, false))
}
}
}
@ -188,11 +192,13 @@ pub(crate) fn build_path(base: PathBuf, chain: &ProcessChain, filename: String)
pub(crate) async fn process_image(
chain: ProcessChain,
mut img: DynamicImage,
) -> Result<DynamicImage, UploadError> {
) -> Result<(DynamicImage, bool), UploadError> {
let mut changed = false;
for processor in chain.inner.into_iter() {
debug!("Step");
let span = Span::current();
img = web::block(move || {
let tup = web::block(move || {
let entered = span.enter();
let res = processor.process(img);
drop(entered);
@ -200,7 +206,10 @@ pub(crate) async fn process_image(
})
.await?;
debug!("Step complete");
img = tup.0;
changed |= tup.1;
}
Ok(img)
Ok((img, changed))
}