Update image to 0.23 (rust-windowing#1485)

Also makes use of a few ergonomics improvements that were introduced or
optimized in the more recent version.

Cargo.toml

@@ -28,7 +28,7 @@ raw-window-handle = "0.3"
 bitflags = "1"
 
 [dev-dependencies]
-image = "0.21"
+image = "0.23"
 simple_logger = "1"
 
 [target.'cfg(target_os = "android")'.dependencies.android_glue]

examples/window_icon.rs

@@ -45,13 +45,11 @@ fn main() {
 
 fn load_icon(path: &Path) -> Icon {
     let (icon_rgba, icon_width, icon_height) = {
-        let image = image::open(path).expect("Failed to open icon path");
-        use image::{GenericImageView, Pixel};
+        let image = image::open(path)
+            .expect("Failed to open icon path")
+            .into_rgba();
         let (width, height) = image.dimensions();
-        let mut rgba = Vec::with_capacity((width * height) as usize * 4);
-        for (_, _, pixel) in image.pixels() {
-            rgba.extend_from_slice(&pixel.to_rgba().data);
-        }
+        let rgba = image.into_raw();
         (rgba, width, height)
     };
     Icon::from_rgba(icon_rgba, icon_width, icon_height).expect("Failed to open icon")