added color swatch picking. Need to align it to the slewed image

src/main.rs

@@ -46,12 +46,17 @@ mod timer;
 mod input;
 mod vkprocessor;
 
+// What next?
+
+// Second sprite for rendering paths at x10 or so resolution
+// color bucketing
+
 fn main() {
 
     let instance = Instance::new(None, &InstanceExtensions::none(), None).unwrap();
     let mut processor = vkprocessor::VkProcessor::new(&instance);
     processor.compile_kernel(String::from("simple-edge.compute"));
-    processor.load_buffers(String::from("test2.png"));
+    processor.load_buffers(String::from("funky-bird.jpg"));
     processor.run_kernel();
     processor.read_image();
     processor.save_image();
@@ -78,7 +83,7 @@ fn main() {
     let mut slider = Slider::new(40.0, None);
 
     let mut selected_colors = Vec::new();
-    selected_colors.push(RectangleShape::with_size(Vector2f::new(30.0, 30.0)));
+
 
     let step_size: f32 = 0.005;
     let mut elapsed_time: f32;
@@ -99,7 +104,22 @@ fn main() {
                     }
                 },
                 Event::MouseButtonPressed { button, x, y} => {
+                    let x = x as u32;
+                    let y = y as u32;
                     mouse_xy = mouse::desktop_position();
+                    let r = processor.image_buffer[((processor.xy.0 * y + x) * 4 + 0) as usize] as u8;
+                    let g = processor.image_buffer[((processor.xy.0 * y + x) * 4 + 1) as usize] as u8;
+                    let b = processor.image_buffer[((processor.xy.0 * y + x) * 4 + 2) as usize] as u8;
+                    let a = processor.image_buffer[((processor.xy.0 * y + x) * 4 + 3) as usize] as u8;
+
+                    selected_colors.push(
+                        RectangleShape::with_size(Vector2f::new(30.0, 30.0))
+                    );
+
+                    let mut x_position = 45.0 * selected_colors.len() as f32;
+
+                    selected_colors.last_mut().unwrap().set_position(Vector2f::new(x_position, 80.0));
+                    selected_colors.last_mut().unwrap().set_fill_color(&Color::rgba(r,g,b,a));
                 },
                 Event::MouseWheelScrolled { wheel, delta, x, y } => {
                     if delta > 0.0 {
@@ -113,12 +133,10 @@ fn main() {
             input.ingest(&event)
         }
 
-        if input.is_mousebutton_held(Button::Left) {
-
+        // Dragging by middle click
+        if input.is_mousebutton_held(Button::Middle) {
             let delta = mouse_xy - mouse::desktop_position();
             mouse_xy = mouse::desktop_position();
-
-            println!("{:?}", delta);
             background_sprite.set_position(
                 background_sprite.position() - Vector2f::new(delta.x as f32, delta.y as f32)
             );
@@ -142,6 +160,9 @@ fn main() {
 
         window.draw(&slider);
 
+        for i in &selected_colors {
+            window.draw(i);
+        }
 
         window.display();
     }