Make bind group an Option for set_bind_group calls.

CHANGELOG.md

@@ -65,6 +65,15 @@ traits that have now been implemented for `wgpu` resources.
 
 By @teoxoy [#6134](https://github.com/gfx-rs/wgpu/pull/6134).
 
+#### `set_bind_group` now takes an `Option` for the bind group argument.
+
+https://gpuweb.github.io/gpuweb/#programmable-passes-bind-groups specifies that bindGroup
+is nullable. This change is the start of implementing this part of the spec. Callers that
+specify a `Some()` value should have unchanged behavior. Handling of `None` values still
+needs to be implemented by backends.
+
+By @bradwerth [#6216](https://github.com/gfx-rs/wgpu/pull/6216).
+
 ### New Features
 
 #### Naga

benches/benches/computepass.rs

@@ -389,7 +389,7 @@ impl ComputepassState {
         let end_idx = start_idx + dispatch_per_pass;
         for dispatch_idx in start_idx..end_idx {
             compute_pass.set_pipeline(&self.pipeline);
-            compute_pass.set_bind_group(0, &self.bind_groups[dispatch_idx], &[]);
+            compute_pass.set_bind_group(0, Some(&self.bind_groups[dispatch_idx]), &[]);
             compute_pass.dispatch_workgroups(1, 1, 1);
         }
 
@@ -412,7 +412,7 @@ impl ComputepassState {
         });
 
         compute_pass.set_pipeline(self.bindless_pipeline.as_ref().unwrap());
-        compute_pass.set_bind_group(0, self.bindless_bind_group.as_ref().unwrap(), &[]);
+        compute_pass.set_bind_group(0, Some(self.bindless_bind_group.as_ref().unwrap()), &[]);
         for _ in 0..dispatch_count_bindless {
             compute_pass.dispatch_workgroups(1, 1, 1);
         }

benches/benches/renderpass.rs

@@ -367,7 +367,7 @@ impl RenderpassState {
         let end_idx = start_idx + draws_per_pass;
         for draw_idx in start_idx..end_idx {
             render_pass.set_pipeline(&self.pipeline);
-            render_pass.set_bind_group(0, &self.bind_groups[draw_idx], &[]);
+            render_pass.set_bind_group(0, Some(&self.bind_groups[draw_idx]), &[]);
             for i in 0..VERTEX_BUFFERS_PER_DRAW {
                 render_pass.set_vertex_buffer(
                     i as u32,
@@ -410,7 +410,7 @@ impl RenderpassState {
         });
 
         render_pass.set_pipeline(self.bindless_pipeline.as_ref().unwrap());
-        render_pass.set_bind_group(0, self.bindless_bind_group.as_ref().unwrap(), &[]);
+        render_pass.set_bind_group(0, Some(self.bindless_bind_group.as_ref().unwrap()), &[]);
         for i in 0..VERTEX_BUFFERS_PER_DRAW {
             render_pass.set_vertex_buffer(i as u32, self.vertex_buffers[0].slice(..));
         }

deno_webgpu/bundle.rs

@@ -150,7 +150,7 @@ pub fn op_webgpu_render_bundle_encoder_set_bind_group(
         wgpu_core::command::bundle_ffi::wgpu_render_bundle_set_bind_group(
             &mut render_bundle_encoder_resource.0.borrow_mut(),
             index,
-            bind_group_resource.1,
+            Some(bind_group_resource.1),
             dynamic_offsets_data.as_ptr(),
             dynamic_offsets_data.len(),
         );

deno_webgpu/compute_pass.rs

@@ -136,7 +136,7 @@ pub fn op_webgpu_compute_pass_set_bind_group(
         .compute_pass_set_bind_group(
             &mut compute_pass_resource.0.borrow_mut(),
             index,
-            bind_group_resource.1,
+            Some(bind_group_resource.1),
             dynamic_offsets_data,
         )?;
 

deno_webgpu/render_pass.rs

@@ -231,7 +231,7 @@ pub fn op_webgpu_render_pass_set_bind_group(
         .render_pass_set_bind_group(
             &mut render_pass_resource.0.borrow_mut(),
             index,
-            bind_group_resource.1,
+            Some(bind_group_resource.1),
             dynamic_offsets_data,
         )?;
 

examples/src/boids/mod.rs

@@ -298,7 +298,7 @@ impl crate::framework::Example for Example {
                 timestamp_writes: None,
             });
             cpass.set_pipeline(&self.compute_pipeline);
-            cpass.set_bind_group(0, &self.particle_bind_groups[self.frame_num % 2], &[]);
+            cpass.set_bind_group(0, Some(&self.particle_bind_groups[self.frame_num % 2]), &[]);
             cpass.dispatch_workgroups(self.work_group_count, 1, 1);
         }
         command_encoder.pop_debug_group();

examples/src/bunnymark/mod.rs

@@ -118,11 +118,11 @@ impl Example {
                 occlusion_query_set: None,
             });
             rpass.set_pipeline(&self.pipeline);
-            rpass.set_bind_group(0, &self.global_group, &[]);
+            rpass.set_bind_group(0, Some(&self.global_group), &[]);
             for i in 0..self.bunnies.len() {
                 let offset =
                     (i as wgpu::DynamicOffset) * (uniform_alignment as wgpu::DynamicOffset);
-                rpass.set_bind_group(1, &self.local_group, &[offset]);
+                rpass.set_bind_group(1, Some(&self.local_group), &[offset]);
                 rpass.draw(0..4, 0..1);
             }
         }

examples/src/conservative_raster/mod.rs

@@ -305,7 +305,7 @@ impl crate::framework::Example for Example {
             });
 
             rpass.set_pipeline(&self.pipeline_upscale);
-            rpass.set_bind_group(0, &self.bind_group_upscale, &[]);
+            rpass.set_bind_group(0, Some(&self.bind_group_upscale), &[]);
             rpass.draw(0..3, 0..1);
 
             if let Some(pipeline_lines) = &self.pipeline_lines {

examples/src/cube/mod.rs

@@ -361,7 +361,7 @@ impl crate::framework::Example for Example {
             });
             rpass.push_debug_group("Prepare data for draw.");
             rpass.set_pipeline(&self.pipeline);
-            rpass.set_bind_group(0, &self.bind_group, &[]);
+            rpass.set_bind_group(0, Some(&self.bind_group), &[]);
             rpass.set_index_buffer(self.index_buf.slice(..), wgpu::IndexFormat::Uint16);
             rpass.set_vertex_buffer(0, self.vertex_buf.slice(..));
             rpass.pop_debug_group();

examples/src/hello_compute/mod.rs

@@ -135,7 +135,7 @@ async fn execute_gpu_inner(
             timestamp_writes: None,
         });
         cpass.set_pipeline(&compute_pipeline);
-        cpass.set_bind_group(0, &bind_group, &[]);
+        cpass.set_bind_group(0, Some(&bind_group), &[]);
         cpass.insert_debug_marker("compute collatz iterations");
         cpass.dispatch_workgroups(numbers.len() as u32, 1, 1); // Number of cells to run, the (x,y,z) size of item being processed
     }

examples/src/hello_synchronization/mod.rs

@@ -128,7 +128,7 @@ async fn execute(
             timestamp_writes: None,
         });
         compute_pass.set_pipeline(&patient_pipeline);
-        compute_pass.set_bind_group(0, &bind_group, &[]);
+        compute_pass.set_bind_group(0, Some(&bind_group), &[]);
         compute_pass.dispatch_workgroups(local_patient_workgroup_results.len() as u32, 1, 1);
     }
     queue.submit(Some(command_encoder.finish()));
@@ -150,7 +150,7 @@ async fn execute(
             timestamp_writes: None,
         });
         compute_pass.set_pipeline(&hasty_pipeline);
-        compute_pass.set_bind_group(0, &bind_group, &[]);
+        compute_pass.set_bind_group(0, Some(&bind_group), &[]);
         compute_pass.dispatch_workgroups(local_patient_workgroup_results.len() as u32, 1, 1);
     }
     queue.submit(Some(command_encoder.finish()));

examples/src/hello_workgroups/mod.rs

@@ -127,7 +127,7 @@ async fn run() {
             timestamp_writes: None,
         });
         compute_pass.set_pipeline(&pipeline);
-        compute_pass.set_bind_group(0, &bind_group, &[]);
+        compute_pass.set_bind_group(0, Some(&bind_group), &[]);
         /* Note that since each workgroup will cover both arrays, we only need to
         cover the length of one array. */
         compute_pass.dispatch_workgroups(local_a.len() as u32, 1, 1);

examples/src/mipmap/mod.rs

@@ -180,7 +180,7 @@ impl Example {
                 );
             }
             rpass.set_pipeline(&pipeline);
-            rpass.set_bind_group(0, &bind_group, &[]);
+            rpass.set_bind_group(0, Some(&bind_group), &[]);
             rpass.draw(0..3, 0..1);
             if let Some(ref query_sets) = query_sets {
                 rpass.write_timestamp(&query_sets.timestamp, timestamp_query_index_base + 1);
@@ -497,7 +497,7 @@ impl crate::framework::Example for Example {
                 occlusion_query_set: None,
             });
             rpass.set_pipeline(&self.draw_pipeline);
-            rpass.set_bind_group(0, &self.bind_group, &[]);
+            rpass.set_bind_group(0, Some(&self.bind_group), &[]);
             rpass.draw(0..4, 0..1);
         }
 

examples/src/repeated_compute/mod.rs

@@ -59,7 +59,7 @@ async fn compute(local_buffer: &mut [u32], context: &WgpuContext) {
             timestamp_writes: None,
         });
         compute_pass.set_pipeline(&context.pipeline);
-        compute_pass.set_bind_group(0, &context.bind_group, &[]);
+        compute_pass.set_bind_group(0, Some(&context.bind_group), &[]);
         compute_pass.dispatch_workgroups(local_buffer.len() as u32, 1, 1);
     }
     // We finish the compute pass by dropping it.

examples/src/shadow/mod.rs

@@ -779,10 +779,10 @@ impl crate::framework::Example for Example {
                     occlusion_query_set: None,
                 });
                 pass.set_pipeline(&self.shadow_pass.pipeline);
-                pass.set_bind_group(0, &self.shadow_pass.bind_group, &[]);
+                pass.set_bind_group(0, Some(&self.shadow_pass.bind_group), &[]);
 
                 for entity in &self.entities {
-                    pass.set_bind_group(1, &self.entity_bind_group, &[entity.uniform_offset]);
+                    pass.set_bind_group(1, Some(&self.entity_bind_group), &[entity.uniform_offset]);
                     pass.set_index_buffer(entity.index_buf.slice(..), entity.index_format);
                     pass.set_vertex_buffer(0, entity.vertex_buf.slice(..));
                     pass.draw_indexed(0..entity.index_count as u32, 0, 0..1);
@@ -823,10 +823,10 @@ impl crate::framework::Example for Example {
                 occlusion_query_set: None,
             });
             pass.set_pipeline(&self.forward_pass.pipeline);
-            pass.set_bind_group(0, &self.forward_pass.bind_group, &[]);
+            pass.set_bind_group(0, Some(&self.forward_pass.bind_group), &[]);
 
             for entity in &self.entities {
-                pass.set_bind_group(1, &self.entity_bind_group, &[entity.uniform_offset]);
+                pass.set_bind_group(1, Some(&self.entity_bind_group), &[entity.uniform_offset]);
                 pass.set_index_buffer(entity.index_buf.slice(..), entity.index_format);
                 pass.set_vertex_buffer(0, entity.vertex_buf.slice(..));
                 pass.draw_indexed(0..entity.index_count as u32, 0, 0..1);

examples/src/skybox/mod.rs

@@ -451,7 +451,7 @@ impl crate::framework::Example for Example {
                 occlusion_query_set: None,
             });
 
-            rpass.set_bind_group(0, &self.bind_group, &[]);
+            rpass.set_bind_group(0, Some(&self.bind_group), &[]);
             rpass.set_pipeline(&self.entity_pipeline);
 
             for entity in self.entities.iter() {

examples/src/srgb_blend/mod.rs

@@ -202,7 +202,7 @@ impl<const SRGB: bool> crate::framework::Example for Example<SRGB> {
             });
             rpass.push_debug_group("Prepare data for draw.");
             rpass.set_pipeline(&self.pipeline);
-            rpass.set_bind_group(0, &self.bind_group, &[]);
+            rpass.set_bind_group(0, Some(&self.bind_group), &[]);
             rpass.set_index_buffer(self.index_buf.slice(..), wgpu::IndexFormat::Uint16);
             rpass.set_vertex_buffer(0, self.vertex_buf.slice(..));
             rpass.pop_debug_group();

examples/src/storage_texture/mod.rs

@@ -117,7 +117,7 @@ async fn run(_path: Option<String>) {
             label: None,
             timestamp_writes: None,
         });
-        compute_pass.set_bind_group(0, &bind_group, &[]);
+        compute_pass.set_bind_group(0, Some(&bind_group), &[]);
         compute_pass.set_pipeline(&pipeline);
         compute_pass.dispatch_workgroups(TEXTURE_DIMS.0 as u32, TEXTURE_DIMS.1 as u32, 1);
     }

examples/src/texture_arrays/mod.rs

@@ -391,12 +391,12 @@ impl crate::framework::Example for Example {
         rpass.set_vertex_buffer(0, self.vertex_buffer.slice(..));
         rpass.set_index_buffer(self.index_buffer.slice(..), self.index_format);
         if self.uniform_workaround {
-            rpass.set_bind_group(0, &self.bind_group, &[0]);
+            rpass.set_bind_group(0, Some(&self.bind_group), &[0]);
             rpass.draw_indexed(0..6, 0, 0..1);
-            rpass.set_bind_group(0, &self.bind_group, &[256]);
+            rpass.set_bind_group(0, Some(&self.bind_group), &[256]);
             rpass.draw_indexed(6..12, 0, 0..1);
         } else {
-            rpass.set_bind_group(0, &self.bind_group, &[0]);
+            rpass.set_bind_group(0, Some(&self.bind_group), &[0]);
             rpass.draw_indexed(0..12, 0, 0..1);
         }
 

examples/src/timestamp_queries/mod.rs

@@ -324,7 +324,7 @@ fn compute_pass(
     });
     *next_unused_query += 2;
     cpass.set_pipeline(&compute_pipeline);
-    cpass.set_bind_group(0, &bind_group, &[]);
+    cpass.set_bind_group(0, Some(&bind_group), &[]);
     cpass.dispatch_workgroups(1, 1, 1);
     if device
         .features()

examples/src/uniform_values/mod.rs

@@ -327,7 +327,11 @@ async fn run(event_loop: EventLoop<()>, window: Arc<Window>) {
                                     });
                                 render_pass.set_pipeline(&wgpu_context_ref.pipeline);
                                 // (9)
-                                render_pass.set_bind_group(0, &wgpu_context_ref.bind_group, &[]);
+                                render_pass.set_bind_group(
+                                    0,
+                                    Some(&wgpu_context_ref.bind_group),
+                                    &[],
+                                );
                                 render_pass.draw(0..3, 0..1);
                             }
                             wgpu_context_ref.queue.submit(Some(encoder.finish()));

examples/src/water/mod.rs

@@ -630,7 +630,7 @@ impl crate::framework::Example for Example {
                     multiview: None,
                 });
             encoder.set_pipeline(&terrain_pipeline);
-            encoder.set_bind_group(0, &terrain_flipped_bind_group, &[]);
+            encoder.set_bind_group(0, Some(&terrain_flipped_bind_group), &[]);
             encoder.set_vertex_buffer(0, terrain_vertex_buf.slice(..));
             encoder.draw(0..terrain_vertices.len() as u32, 0..1);
             encoder.finish(&wgpu::RenderBundleDescriptor::default())
@@ -784,7 +784,7 @@ impl crate::framework::Example for Example {
                 occlusion_query_set: None,
             });
             rpass.set_pipeline(&self.terrain_pipeline);
-            rpass.set_bind_group(0, &self.terrain_normal_bind_group, &[]);
+            rpass.set_bind_group(0, Some(&self.terrain_normal_bind_group), &[]);
             rpass.set_vertex_buffer(0, self.terrain_vertex_buf.slice(..));
             rpass.draw(0..self.terrain_vertex_count as u32, 0..1);
         }
@@ -811,7 +811,7 @@ impl crate::framework::Example for Example {
             });
 
             rpass.set_pipeline(&self.water_pipeline);
-            rpass.set_bind_group(0, &self.water_bind_group, &[]);
+            rpass.set_bind_group(0, Some(&self.water_bind_group), &[]);
             rpass.set_vertex_buffer(0, self.water_vertex_buf.slice(..));
             rpass.draw(0..self.water_vertex_count as u32, 0..1);
         }

player/tests/data/bind-group.ron

@@ -70,7 +70,7 @@
                         SetBindGroup(
                             index: 0,
                             num_dynamic_offsets: 0,
-                            bind_group_id: Id(0, 1, Empty),
+                            bind_group_id: Some(Id(0, 1, Empty)),
                         ),
                         SetPipeline(Id(0, 1, Empty)),
                     ],

player/tests/data/zero-init-buffer.ron

@@ -149,7 +149,7 @@
                         SetBindGroup(
                             index: 0,
                             num_dynamic_offsets: 0,
-                            bind_group_id: Id(0, 1, Empty),
+                            bind_group_id: Some(Id(0, 1, Empty)),
                         ),
                         Dispatch((4, 1, 1)),
                     ],

player/tests/data/zero-init-texture-binding.ron

@@ -150,7 +150,7 @@
                         SetBindGroup(
                             index: 0,
                             num_dynamic_offsets: 0,
-                            bind_group_id: Id(0, 1, Empty),
+                            bind_group_id: Some(Id(0, 1, Empty)),
                         ),
                         Dispatch((4, 1, 1)),
                     ],

tests/src/image.rs

@@ -377,7 +377,7 @@ fn copy_via_compute(
         let mut pass = encoder.begin_compute_pass(&ComputePassDescriptor::default());
 
         pass.set_pipeline(&pipeline_copy);
-        pass.set_bind_group(0, &bg, &[]);
+        pass.set_bind_group(0, Some(&bg), &[]);
         pass.dispatch_workgroups(1, 1, 1);
     }
 

tests/tests/bgra8unorm_storage.rs

@@ -110,7 +110,7 @@ static BGRA8_UNORM_STORAGE: GpuTestConfiguration = GpuTestConfiguration::new()
                 timestamp_writes: None,
             });
 
-            pass.set_bind_group(0, &bg, &[]);
+            pass.set_bind_group(0, Some(&bg), &[]);
             pass.set_pipeline(&pipeline);
             pass.dispatch_workgroups(256, 256, 1);
         }