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#![allow(unused_imports, unused_variables, dead_code, unreachable_code)]
// cargo run --example gradients --all-features --release
use std::fs;
use std::io::BufReader;
use std::path::Path;
use colorgrad::{Color, GimpGradient, Gradient};
mod gradients;
mod util;
use util::{grad_rgb_plot, gradient_image};
fn main() -> Result<(), Box<dyn std::error::Error>> {
let output_dir = Path::new("example_output/");
if !output_dir.exists() {
fs::create_dir(output_dir).expect("Failed to create example_output/ directory.");
}
let css_gradients = [
"red, blue",
"red 30%, blue 70%",
"red, 75%, blue",
"red, yellow, lime, aqua, blue, magenta, red",
"tomato 0% 50%, gold 50%, tomato",
"purple 50%, deeppink 50%, gold, seagreen",
"blue, cyan, gold, purple 50%, tomato 50%",
"seagreen 30%, gold 0 70%, deeppink 0",
"rgb(40, 230, 65) 10%, hotpink, steelblue",
"rgb(255, 0, 0) 0% 50%, rgb(0, 0, 255), red, lime",
"red, #f000",
"red, 75%, #f000",
"red -100, yellow, lime, aqua, blue, magenta, red 100",
"red, lime -10, blue 15, gold",
];
println!("--- CSS Gradients");
println!();
for (i, s) in css_gradients.iter().enumerate() {
println!("input \"{s}\"");
let g = colorgrad::GradientBuilder::new()
.css(s)
.mode(colorgrad::BlendMode::Rgb)
.build::<colorgrad::CatmullRomGradient>();
if let Ok(grad) = g {
println!("domain {:?}", grad.domain());
let imgbuf = grad_rgb_plot(&grad, 1000, 150, 10, None);
let file_path = format!("example_output/css_{i}.png");
println!("{file_path}");
imgbuf.save(file_path)?;
} else {
println!("error");
}
println!();
}
for (grad, name) in gradients::preset() {
let imgbuf = grad_rgb_plot(&*grad, 1000, 150, 10, None);
let file_path = format!("example_output/preset_{name}.png");
println!("{file_path}");
imgbuf.save(file_path)?;
}
for (grad, name) in gradients::blend_mode() {
let imgbuf = grad_rgb_plot(&*grad, 1000, 150, 10, None);
let file_path = format!("example_output/mode_{name}.png");
println!("{file_path}");
imgbuf.save(file_path)?;
}
for (grad, name) in gradients::interpolation() {
let imgbuf = grad_rgb_plot(&*grad, 1000, 150, 10, None);
let file_path = format!("example_output/interpolation_{name}.png");
println!("{file_path}");
imgbuf.save(file_path)?;
}
for (grad, name) in gradients::sharp() {
let imgbuf = grad_rgb_plot(&*grad, 1000, 150, 10, None);
let file_path = format!("example_output/{name}.png");
println!("{file_path}");
imgbuf.save(file_path)?;
}
// GIMP gradients
for item in Path::new("examples/ggr/").read_dir()? {
let path = item.unwrap().path();
if let Some(ext) = path.extension() {
if ext == "ggr" {
let fname = path.file_name().unwrap().to_str().unwrap();
let input = fs::File::open(&path)?;
let col = Color::default();
let gradient = GimpGradient::new(BufReader::new(input), &col, &col)?;
let imgbuf = grad_rgb_plot(&gradient, 1000, 150, 10, None);
let file_path = format!("example_output/ggr_{fname}.png");
println!("{file_path} ({})", gradient.name());
imgbuf.save(file_path)?;
}
}
}
Ok(())
}
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