add obiv, the obi image viewer

1 files changed, 79 insertions, 0 deletions

diff --git a/src/bin/viewer.rs b/src/bin/viewer.rs
new file mode 100644
index 0000000..e600aee
--- /dev/null
+++ b/src/bin/viewer.rs
@@ -0,0 +1,79 @@
+use std::env;
+use std::fs::{File, OpenOptions};
+use std::io::{self, prelude, Cursor, Read};
+
+const HELP_TEXT: &'static str = r#"
+OBI Viewer
+"#;
+
+use obi::Image;
+use sdl2::{event::Event, keyboard::Keycode, pixels::Color, rect::Rect};
+
+fn main() {
+    let args = env::args().collect::<Vec<_>>();
+
+    let sdl_context = sdl2::init().unwrap();
+    let video_subsystem = sdl_context.video().unwrap();
+
+    match &args[..] {
+        [_, path] => {
+            eprintln!("{}", path);
+            let image_src = OpenOptions::new()
+                .read(true)
+                .write(false)
+                .create(false)
+                .open(path);
+            if let Ok(mut image) = image_src {
+                let mut buf = Vec::new();
+                image.read_to_end(&mut buf);
+                let img = Image::decode(&mut (Cursor::new(buf))).unwrap();
+
+                let window = video_subsystem
+                    .window("OBI Viewer", img.width(), img.height())
+                    .position_centered()
+                    .opengl()
+                    .build()
+                    .map_err(|e| e.to_string())
+                    .unwrap();
+
+                let mut canvas = window
+                    .into_canvas()
+                    .build()
+                    .map_err(|e| e.to_string())
+                    .unwrap();
+
+                let mut event_pump = sdl_context.event_pump().unwrap();
+
+                'running: loop {
+                    for event in event_pump.poll_iter() {
+                        match event {
+                            Event::Quit { .. }
+                            | Event::KeyDown {
+                                keycode: Some(Keycode::Escape),
+                                ..
+                            } => break 'running,
+                            _ => {}
+                        }
+                    }
+
+                    canvas.set_draw_color(Color::RGB(0, 0, 0));
+                    canvas.clear();
+                    canvas.set_draw_color(Color::RGB(255, 255, 255));
+
+                    for x in 0..img.width() {
+                        for y in 0..img.height() {
+                            if img.data[img.index(x, y).unwrap()] {
+                                canvas.fill_rect(Rect::new(x as i32, y as i32, 1, 1));
+                            }
+                        }
+                    }
+
+                    canvas.present();
+                }
+            }
+        }
+        _ => {
+            eprintln!("requires and argument!");
+        }
+    }
+}