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Diffstat (limited to 'vendor/plotters/examples/blit-bitmap.rs')
-rw-r--r-- | vendor/plotters/examples/blit-bitmap.rs | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/vendor/plotters/examples/blit-bitmap.rs b/vendor/plotters/examples/blit-bitmap.rs new file mode 100644 index 000000000..990b25645 --- /dev/null +++ b/vendor/plotters/examples/blit-bitmap.rs @@ -0,0 +1,45 @@ +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() +} |