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bendn 2023-10-30 20:11:58 +07:00
parent 47a299d9ae
commit bb33b6cb10
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1 changed files with 10 additions and 1 deletions
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11
src/lib.rs
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@ -526,9 +526,18 @@ impl<const CHANNELS: usize> Image<Vec<u8>, CHANNELS> {
#[cfg(feature = "save")] #[cfg(feature = "save")]
/// Open a PNG image /// Open a PNG image
pub fn open(f: impl AsRef<std::path::Path>) -> Self { pub fn open(f: impl AsRef<std::path::Path>) -> Self {
use png::Transformations as T;
let p = std::fs::File::open(f).unwrap(); let p = std::fs::File::open(f).unwrap();
let r = std::io::BufReader::new(p); let r = std::io::BufReader::new(p);
let dec = png::Decoder::new(r); let mut dec = png::Decoder::new(r);
match CHANNELS {
1 => dec.set_transformations(T::STRIP_16 | T::EXPAND),
2 => dec.set_transformations(T::STRIP_16 | T::ALPHA),
3 => dec.set_transformations(T::STRIP_16 | T::EXPAND),
4 => dec.set_transformations(T::STRIP_16 | T::ALPHA),
_ => (),
}
dec.set_transformations(png::Transformations::EXPAND);
let mut reader = dec.read_info().unwrap(); let mut reader = dec.read_info().unwrap();
let mut buf = vec![0; reader.output_buffer_size()]; let mut buf = vec![0; reader.output_buffer_size()];
let info = reader.next_frame(&mut buf).unwrap(); let info = reader.next_frame(&mut buf).unwrap();