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use plotters::prelude::*;
use image::{imageops::FilterType, ImageFormat};
use std::fs::File;
use std::io::BufReader;
const OUT_FILE_NAME: &'static str = "plotters-doc-data/blit-bitmap.png";
fn main() -> Result<(), Box<dyn std::error::Error>> {
let root = BitMapBackend::new(OUT_FILE_NAME, (1024, 768)).into_drawing_area();
root.fill(&WHITE)?;
let mut chart = ChartBuilder::on(&root)
.caption("Bitmap Example", ("sans-serif", 30))
.margin(5)
.set_label_area_size(LabelAreaPosition::Left, 40)
.set_label_area_size(LabelAreaPosition::Bottom, 40)
.build_cartesian_2d(0.0..1.0, 0.0..1.0)?;
chart.configure_mesh().disable_mesh().draw()?;
let (w, h) = chart.plotting_area().dim_in_pixel();
let image = image::load(
BufReader::new(
File::open("plotters-doc-data/cat.png").map_err(|e| {
eprintln!("Unable to open file plotters-doc-data.png, please make sure you have clone this repo with --recursive");
e
})?),
ImageFormat::Png,
)?
.resize_exact(w - w / 10, h - h / 10, FilterType::Nearest);
let elem: BitMapElement<_> = ((0.05, 0.95), image).into();
chart.draw_series(std::iter::once(elem))?;
// To avoid the IO failure being ignored silently, we manually call the present function
root.present().expect("Unable to write result to file, please make sure 'plotters-doc-data' dir exists under current dir");
println!("Result has been saved to {}", OUT_FILE_NAME);
Ok(())
}
#[test]
fn entry_point() {
main().unwrap()
}
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