still dont know why this isn't working

resources/shaders/add.compute

@@ -1,12 +1,16 @@
 #version 450
 
-layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+layout(local_size_x = 64, local_size_y = 1, local_size_z = 1) in;
 
 layout(set = 0, binding = 0) buffer Data {
     uint data[];
 } data;
 
 void main() {
-    uint idx = gl_GlobalInvocationID.x;
-    data.data[idx] += 100;
+    uint idx = (gl_GlobalInvocationID.y * 720 + gl_GlobalInvocationID.x);
+
+    data.data[idx+0] = 255;
+    data.data[idx+1] = 0;
+    data.data[idx+2] = 0;
+
 }

src/main.rs

@@ -60,7 +60,7 @@ impl<'t> Edge<'t> {
         let mut surface = RenderTexture::new(800, 600, false).unwrap();
         surface.set_smooth(true);
         let mut bg_sprite = Sprite::with_texture(bg_texture);
-        bg_sprite.set_position((135., 100.));
+        bg_sprite.set_position((0., 0.));
         let mut entities = Vec::new();
 
         for i in 0..6 {
@@ -174,7 +174,12 @@ fn main() {
     let mut img = image::open("resources/images/funky-bird.jpg").unwrap();
     let xy = img.dimensions();
     let data_length = xy.0*xy.1*3;
+
     println!("Buffer length {}", data_length);
+    println!("Buffer length {}", img.raw_pixels().len());
+    println!("Size {:?}", xy);
+
+    let mut image_buffer = Vec::new();
 
     {
         // Pull out the image data and place it in a sync'd CPU<->GPU buffer
@@ -193,7 +198,7 @@ fn main() {
 
         // The command buffer I think pretty much serves to define what runs where for how many times
         let command_buffer = AutoCommandBufferBuilder::primary_one_time_submit(device.clone(), queue.family()).unwrap()
-            .dispatch([1024, 1, 1], pipeline.clone(), set.clone(), ()).unwrap()
+            .dispatch([xy.0, xy.1, 1], pipeline.clone(), set.clone(), ()).unwrap()
             .build().unwrap();
 
         // Create a future for running the command buffer and then just fence it
@@ -202,22 +207,25 @@ fn main() {
             .then_signal_fence_and_flush().unwrap();
 
         // I think this is redundant and returns immediately
-        future.wait(None).unwrap();
+     //   future.wait(None).unwrap();
 
         // The buffer is sync'd so we can just read straight from the handle
         let data_buffer_content = data_buffer.read().unwrap();
 
-        //
-        for x in 0 .. xy.0 {
-            for y in 0 .. xy.1 {
+        for y in 0 .. xy.1 {
+            for x in 0 .. xy.0 {
 
                 let r = data_buffer_content[((xy.0 * y + x) * 3 + 0) as usize] as u8;
                 let g = data_buffer_content[((xy.0 * y + x) * 3 + 1) as usize] as u8;
                 let b = data_buffer_content[((xy.0 * y + x) * 3 + 2) as usize] as u8;
-              //  let a = data_buffer_content[((xy.0 * y + x) * 4 + 3) as usize] as u8;
 
-                let old = img.get_pixel(x, y);
-                img.put_pixel(x, y, image::Rgba([r, g, b, 0]));
+                image_buffer.push(r);
+                image_buffer.push(g);
+                image_buffer.push(b);
+                image_buffer.push(255);
+
+                img.put_pixel(x, y, image::Rgba([r, g, b, 255]))
+
             }
         }
     }
@@ -227,7 +235,7 @@ fn main() {
     println!("Starting");
 
     let mut window = RenderWindow::new(
-        (512, 512),
+        (900, 900),
         "Custom drawable",
         Style::CLOSE,
         &Default::default(),
@@ -239,7 +247,9 @@ fn main() {
     //==========================================
     let font = Font::from_file("resources/fonts/sansation.ttf").unwrap();
 
-    let mut bg_texture = Texture::from_file("output.png").unwrap();
+
+    let mut bg_texture = Texture::new(xy.0, xy.1).unwrap();
+    bg_texture.update_from_pixels(image_buffer.as_slice(), xy.0, xy.1, 0, 0);
     //let mut bg_texture = Texture::from_file("resources/images/sfml.png").unwrap();
     //bg_texture.set_smooth(true);