Init

.gitignore

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+/target
+**/*.rs.bk
+.history

Cargo.toml

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+[package]
+name = "oculante"
+version = "0.1.1"
+authors = ["Johann Woelper <woelper@gmail.com>"]
+edition = "2018"
+
+[dependencies]
+piston_window = "*"
+clap = "*"
+image = "*"

src/main.rs

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+extern crate piston_window;
+
+use clap;
+use clap::{App, Arg, SubCommand};
+use piston_window::*;
+
+fn main() {
+    let matches = App::new("Oculante")
+        .arg(
+            Arg::with_name("INPUT")
+                .help("Display this image")
+                .required(true)
+                .index(1),
+        )
+        .get_matches();
+
+    let img = matches.value_of("INPUT").unwrap();
+
+    let opengl = OpenGL::V3_2;
+    let mut window: PistonWindow = WindowSettings::new("Oculante", [300, 300])
+        .exit_on_esc(true)
+        .graphics_api(opengl)
+        .build()
+        .unwrap();
+
+    match Texture::from_path(
+        &mut window.create_texture_context(),
+        &img,
+        Flip::None,
+        &TextureSettings::new(),
+    ) {
+        Ok(texture) => {
+            window.set_lazy(true);
+            while let Some(e) = window.next() {
+                window.draw_2d(&e, |c, g, _| {
+                    clear([1.0; 4], g);
+                    image(&texture, c.transform, g);
+                });
+            }
+        }
+        Err(e) => println!("Could not create texture. {}", e),
+    }
+}