sync with local; working normal/complex conversions

src/image_manipulation.rs

@@ -0,0 +1,38 @@
+use std::cmp::min;
+use termion::terminal_size;
+use log::error;
+use std::process::exit;
+use std::path::PathBuf;
+use image::DynamicImage;
+
+fn get_terminal_size() -> u32 {
+    let size = terminal_size();
+    match size {
+        Ok(size) => {
+            size.0 as u32
+        }
+        Err(e) => {
+            error!("Failed to get terminal size: {}", e.to_string());
+            exit(1);
+        }
+    }
+}
+
+pub fn get_size(w: Option<u16>, img_w: u32) -> u16 {
+    if None == w {
+        min(get_terminal_size(), img_w) as u16
+    } else {
+        w.unwrap()
+    }
+}
+
+pub fn open_image(path: PathBuf) -> DynamicImage {
+    let img = image::open(path);
+    match img {
+        Ok(img) => img,
+        Err(e) => {
+            error!("Failed to open image: {}", e.to_string());
+            exit(1)
+        }
+    }
+}