Clean up the borders

Author: DJMcNab

rust-gpu-toy/shaders/src/lib.rs

@@ -34,7 +34,13 @@ pub fn main(
         1.0,
     );
 
-    unsafe { output_buffer.write(global_ix.truncate(), frag_color) }
+    // Without the int8 capability, can't use bools
+    // A better choice might be to just enable the int8 capability
+    if global_ix.x < config.width {
+        if global_ix.y < config.height {
+            unsafe { output_buffer.write(global_ix.truncate(), frag_color) }
+        }
+    }
 }
 
 // A simple vert/frag shader to copy an image to the swapchain.

rust-gpu-toy/src/main.rs

@@ -334,7 +334,8 @@ impl State {
                 cpass.set_pipeline(&self.pipelines.compute_pipeline);
                 cpass.set_push_constants(0, bytemuck::bytes_of(&config));
                 cpass.set_bind_group(0, &self.compute_bind_group, &[]);
-                cpass.dispatch(size.width / 16, size.height / 16, 1);
+                // Round up to next multiple
+                cpass.dispatch((size.width + 16 - 1) / 16, (size.height + 16 - 1) / 16, 1);
             }
             {
                 let mut rpass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {