Added fruit example to show a more recognizable image for debugging

examples/fruit.jpg.license

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+fruit.jpg is licensed under the Creative Commons Attribution 3.0 Unported license and was put on Wikimedia by user Atomcibre
+
+Source: https://commons.wikimedia.org/wiki/File:Culinary_fruits_front_view.jpg
+
+License: https://creativecommons.org/licenses/by/3.0/deed.en

examples/fruit.rs

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+use image::GenericImageView;
+use softbuffer::GraphicsContext;
+use winit::event::{Event, WindowEvent};
+use winit::event_loop::{ControlFlow, EventLoop};
+use winit::window::WindowBuilder;
+
+fn main() {
+    //see fruit.jpg.license for the license of fruit.jpg
+    let fruit = image::load_from_memory(include_bytes!("fruit.jpg")).unwrap();
+    let buffer = fruit.pixels().map(|(_x, _y, pixel)|{
+        let red = pixel.0[0] as u32;
+        let green = pixel.0[1] as u32;
+        let blue = pixel.0[2] as u32;
+
+        blue | (green << 8) | (red << 16)
+    }).collect::<Vec<_>>();
+
+    let event_loop = EventLoop::new();
+    let window = WindowBuilder::new().build(&event_loop).unwrap();
+    let mut graphics_context = unsafe { GraphicsContext::new(window) }.unwrap();
+
+    event_loop.run(move |event, _, control_flow| {
+        *control_flow = ControlFlow::Wait;
+
+        match event {
+            Event::RedrawRequested(window_id) if window_id == graphics_context.window().id() => {
+                graphics_context.set_buffer(&buffer, fruit.width() as u16, fruit.height() as u16);
+            }
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                window_id,
+            } if window_id == graphics_context.window().id() => {
+                *control_flow = ControlFlow::Exit;
+            }
+            _ => {}
+        }
+    });
+}