50 lines
1.6 KiB
Rust
50 lines
1.6 KiB
Rust
use image::imageops::FilterType;
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use image::ImageFormat;
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use std::fmt;
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use std::fs::File;
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use std::time::{Duration, Instant};
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struct Elapsed(Duration);
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impl Elapsed {
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fn from(start: &Instant) -> Self {
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Elapsed(start.elapsed())
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}
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}
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impl fmt::Display for Elapsed {
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fn fmt(&self, out: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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match (self.0.as_secs(), self.0.subsec_nanos()) {
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(0, n) if n < 1000 => write!(out, "{} ns", n),
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(0, n) if n < 1_000_000 => write!(out, "{} µs", n / 1000),
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(0, n) => write!(out, "{} ms", n / 1_000_000),
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(s, n) if s < 10 => write!(out, "{}.{:02} s", s, n / 10_000_000),
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(s, _) => write!(out, "{} s", s),
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}
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}
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}
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fn main() {
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let tiny = image::open("examples/scaleup/tinycross.png").unwrap();
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for &(name, filter) in [
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("near", FilterType::Nearest),
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("tri", FilterType::Triangle),
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("xcmr", FilterType::CatmullRom),
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("ygauss", FilterType::Gaussian),
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("zlcz2", FilterType::Lanczos3),
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]
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.iter()
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{
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let timer = Instant::now();
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let scaled = tiny.resize(32, 32, filter);
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println!("Scaled by {} in {}", name, Elapsed::from(&timer));
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let mut output = File::create(&format!("up2-{}.png", name)).unwrap();
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scaled.write_to(&mut output, ImageFormat::Png).unwrap();
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let timer = Instant::now();
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let scaled = tiny.resize(48, 48, filter);
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println!("Scaled by {} in {}", name, Elapsed::from(&timer));
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let mut output = File::create(&format!("up3-{}.png", name)).unwrap();
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scaled.write_to(&mut output, ImageFormat::Png).unwrap();
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}
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}
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