Add GPUSampler to WebGPU implementation

Add dom_struct and webidl for GPUSampler, implement GPUDevice.createSampler() method.

7 files changed, 246 insertions, 84 deletions

diff --git a/components/script/dom/bindings/trace.rs b/components/script/dom/bindings/trace.rs
index ba174193cdf..29160e61186 100644
--- a/components/script/dom/bindings/trace.rs
+++ b/components/script/dom/bindings/trace.rs
@@ -160,7 +160,7 @@ use uuid::Uuid;
 use webgpu::{
     wgpu::command::RawPass, WebGPU, WebGPUAdapter, WebGPUBindGroup, WebGPUBindGroupLayout,
     WebGPUBuffer, WebGPUCommandBuffer, WebGPUCommandEncoder, WebGPUComputePipeline, WebGPUDevice,
-    WebGPUPipelineLayout, WebGPUQueue, WebGPUShaderModule,
+    WebGPUPipelineLayout, WebGPUQueue, WebGPUSampler, WebGPUShaderModule,
 };
 use webrender_api::{DocumentId, ImageKey};
 use webxr_api::SwapChainId as WebXRSwapChainId;
@@ -559,6 +559,7 @@ unsafe_no_jsmanaged_fields!(WebGPUComputePipeline);
 unsafe_no_jsmanaged_fields!(WebGPUPipelineLayout);
 unsafe_no_jsmanaged_fields!(WebGPUQueue);
 unsafe_no_jsmanaged_fields!(WebGPUShaderModule);
+unsafe_no_jsmanaged_fields!(WebGPUSampler);
 unsafe_no_jsmanaged_fields!(WebGPUCommandBuffer);
 unsafe_no_jsmanaged_fields!(WebGPUCommandEncoder);
 unsafe_no_jsmanaged_fields!(WebGPUDevice);
diff --git a/components/script/dom/gpudevice.rs b/components/script/dom/gpudevice.rs
index fa773a74694..2a5c84e99af 100644
--- a/components/script/dom/gpudevice.rs
+++ b/components/script/dom/gpudevice.rs
@@ -16,6 +16,9 @@ use crate::dom::bindings::codegen::Bindings::GPUDeviceBinding::{
     GPUCommandEncoderDescriptor, GPUDeviceMethods,
 };
 use crate::dom::bindings::codegen::Bindings::GPUPipelineLayoutBinding::GPUPipelineLayoutDescriptor;
+use crate::dom::bindings::codegen::Bindings::GPUSamplerBinding::{
+    GPUAddressMode, GPUCompareFunction, GPUFilterMode, GPUSamplerDescriptor,
+};
 use crate::dom::bindings::codegen::Bindings::GPUShaderModuleBinding::GPUShaderModuleDescriptor;
 use crate::dom::bindings::codegen::UnionTypes::Uint32ArrayOrString::{String, Uint32Array};
 use crate::dom::bindings::reflector::{reflect_dom_object, DomObject};
@@ -32,6 +35,7 @@ use crate::dom::gpucommandencoder::GPUCommandEncoder;
 use crate::dom::gpucomputepipeline::GPUComputePipeline;
 use crate::dom::gpupipelinelayout::GPUPipelineLayout;
 use crate::dom::gpuqueue::GPUQueue;
+use crate::dom::gpusampler::GPUSampler;
 use crate::dom::gpushadermodule::GPUShaderModule;
 use crate::script_runtime::JSContext as SafeJSContext;
 use dom_struct::dom_struct;
@@ -44,11 +48,7 @@ use std::ptr::{self, NonNull};
 use webgpu::wgpu::binding_model::{
     BindGroupEntry, BindGroupLayoutEntry, BindingResource, BindingType, BufferBinding,
 };
-use webgpu::wgt::{
-    BufferDescriptor, BufferUsage, ShaderStage, TextureComponentType, TextureFormat,
-    TextureViewDimension,
-};
-use webgpu::{WebGPU, WebGPUDevice, WebGPUQueue, WebGPURequest};
+use webgpu::{wgt, WebGPU, WebGPUDevice, WebGPUQueue, WebGPURequest, WebGPUSampler};
 
 #[dom_struct]
 pub struct GPUDevice {
@@ -110,15 +110,15 @@ impl GPUDevice {
     fn validate_buffer_descriptor(
         &self,
         descriptor: &GPUBufferDescriptor,
-    ) -> (bool, BufferDescriptor<std::string::String>) {
+    ) -> (bool, wgt::BufferDescriptor<std::string::String>) {
         // TODO: Record a validation error in the current scope if the descriptor is invalid.
-        let wgpu_usage = BufferUsage::from_bits(descriptor.usage);
+        let wgpu_usage = wgt::BufferUsage::from_bits(descriptor.usage);
         let valid = wgpu_usage.is_some() && descriptor.size > 0;
 
         if valid {
             (
                 true,
-                BufferDescriptor {
+                wgt::BufferDescriptor {
                     size: descriptor.size,
                     usage: wgpu_usage.unwrap(),
                     label: Default::default(),
@@ -127,9 +127,9 @@ impl GPUDevice {
         } else {
             (
                 false,
-                BufferDescriptor {
+                wgt::BufferDescriptor {
                     size: 0,
-                    usage: BufferUsage::STORAGE,
+                    usage: wgt::BufferUsage::empty(),
                     label: Default::default(),
                 },
             )
@@ -280,9 +280,9 @@ impl GPUDeviceMethods for GPUDevice {
             max_storage_textures_per_shader_stage: limits.maxStorageTexturesPerShaderStage as i32,
             max_samplers_per_shader_stage: limits.maxSamplersPerShaderStage as i32,
         };
-        validation_map.insert(ShaderStage::VERTEX, maxLimits.clone());
-        validation_map.insert(ShaderStage::FRAGMENT, maxLimits.clone());
-        validation_map.insert(ShaderStage::COMPUTE, maxLimits.clone());
+        validation_map.insert(wgt::ShaderStage::VERTEX, maxLimits.clone());
+        validation_map.insert(wgt::ShaderStage::FRAGMENT, maxLimits.clone());
+        validation_map.insert(wgt::ShaderStage::COMPUTE, maxLimits.clone());
         let mut max_dynamic_uniform_buffers_per_pipeline_layout =
             limits.maxDynamicUniformBuffersPerPipelineLayout as i32;
         let mut max_dynamic_storage_buffers_per_pipeline_layout =
@@ -295,11 +295,11 @@ impl GPUDeviceMethods for GPUDevice {
             .map(|bind| {
                 // TODO: binding must be >= 0
                 storeBindings.insert(bind.binding);
-                let visibility = match ShaderStage::from_bits(bind.visibility) {
+                let visibility = match wgt::ShaderStage::from_bits(bind.visibility) {
                     Some(visibility) => visibility,
                     None => {
                         valid = false;
-                        ShaderStage::from_bits(0).unwrap()
+                        wgt::ShaderStage::from_bits(0).unwrap()
                     },
                 };
                 let ty = match bind.type_ {
@@ -375,9 +375,9 @@ impl GPUDeviceMethods for GPUDevice {
                     has_dynamic_offset: bind.hasDynamicOffset,
                     multisampled: bind.multisampled,
                     // Use as default for now
-                    texture_component_type: TextureComponentType::Float,
-                    storage_texture_format: TextureFormat::Rgba8UnormSrgb,
-                    view_dimension: TextureViewDimension::D2,
+                    texture_component_type: wgt::TextureComponentType::Float,
+                    storage_texture_format: wgt::TextureFormat::Rgba8UnormSrgb,
+                    view_dimension: wgt::TextureViewDimension::D2,
                 }
             })
             .collect::<Vec<BindGroupLayoutEntry>>();
@@ -507,7 +507,7 @@ impl GPUDeviceMethods for GPUDevice {
             let buffer_size = bind.resource.buffer.size();
             let resource_size = bind.resource.size.unwrap_or(buffer_size);
             let length = bind.resource.offset.checked_add(resource_size);
-            let usage = BufferUsage::from_bits(bind.resource.buffer.usage()).unwrap();
+            let usage = wgt::BufferUsage::from_bits(bind.resource.buffer.usage()).unwrap();
 
             length.is_some() &&
             buffer_size >= length.unwrap() && // check buffer OOB
@@ -515,9 +515,9 @@ impl GPUDeviceMethods for GPUDevice {
             bind.resource.offset < buffer_size && // on Vulkan offset must be less than size of buffer
             descriptor.layout.bindings().iter().any(|layout_bind| {
                 let ty = match layout_bind.type_ {
-                    GPUBindingType::Storage_buffer  => BufferUsage::STORAGE,
+                    GPUBindingType::Storage_buffer  => wgt::BufferUsage::STORAGE,
                     // GPUBindingType::Readonly_storage_buffer  => BufferUsage::STORAGE_READ,
-                    GPUBindingType::Uniform_buffer => BufferUsage::UNIFORM,
+                    GPUBindingType::Uniform_buffer => wgt::BufferUsage::UNIFORM,
                     _ => unimplemented!(),
                 };
                 // binding must be present in layout
@@ -641,4 +641,72 @@ impl GPUDeviceMethods for GPUDevice {
 
         GPUCommandEncoder::new(&self.global(), self.channel.clone(), encoder, true)
     }
+    /// https://gpuweb.github.io/gpuweb/#dom-gpudevice-createsampler
+    fn CreateSampler(&self, descriptor: &GPUSamplerDescriptor) -> DomRoot<GPUSampler> {
+        let sampler_id = self
+            .global()
+            .wgpu_id_hub()
+            .lock()
+            .create_sampler_id(self.device.0.backend());
+        let compare_enable = descriptor.compare.is_some();
+        let desc = wgt::SamplerDescriptor {
+            label: Default::default(),
+            address_mode_u: assign_address_mode(descriptor.addressModeU),
+            address_mode_v: assign_address_mode(descriptor.addressModeV),
+            address_mode_w: assign_address_mode(descriptor.addressModeW),
+            mag_filter: assign_filter_mode(descriptor.magFilter),
+            min_filter: assign_filter_mode(descriptor.minFilter),
+            mipmap_filter: assign_filter_mode(descriptor.mipmapFilter),
+            lod_min_clamp: *descriptor.lodMinClamp,
+            lod_max_clamp: *descriptor.lodMaxClamp,
+            compare: if let Some(c) = descriptor.compare {
+                match c {
+                    GPUCompareFunction::Never => wgt::CompareFunction::Never,
+                    GPUCompareFunction::Less => wgt::CompareFunction::Less,
+                    GPUCompareFunction::Equal => wgt::CompareFunction::Equal,
+                    GPUCompareFunction::Less_equal => wgt::CompareFunction::LessEqual,
+                    GPUCompareFunction::Greater => wgt::CompareFunction::Greater,
+                    GPUCompareFunction::Not_equal => wgt::CompareFunction::NotEqual,
+                    GPUCompareFunction::Greater_equal => wgt::CompareFunction::GreaterEqual,
+                    GPUCompareFunction::Always => wgt::CompareFunction::Always,
+                }
+            } else {
+                wgt::CompareFunction::Undefined
+            },
+        };
+        self.channel
+            .0
+            .send(WebGPURequest::CreateSampler {
+                device_id: self.device.0,
+                sampler_id,
+                descriptor: desc,
+            })
+            .expect("Failed to create WebGPU sampler");
+
+        let sampler = WebGPUSampler(sampler_id);
+
+        GPUSampler::new(
+            &self.global(),
+            self.channel.clone(),
+            self.device,
+            compare_enable,
+            sampler,
+            true,
+        )
+    }
+}
+
+fn assign_address_mode(address_mode: GPUAddressMode) -> wgt::AddressMode {
+    match address_mode {
+        GPUAddressMode::Clamp_to_edge => wgt::AddressMode::ClampToEdge,
+        GPUAddressMode::Repeat => wgt::AddressMode::Repeat,
+        GPUAddressMode::Mirror_repeat => wgt::AddressMode::MirrorRepeat,
+    }
+}
+
+fn assign_filter_mode(filter_mode: GPUFilterMode) -> wgt::FilterMode {
+    match filter_mode {
+        GPUFilterMode::Nearest => wgt::FilterMode::Nearest,
+        GPUFilterMode::Linear => wgt::FilterMode::Linear,
+    }
 }
diff --git a/components/script/dom/gpusampler.rs b/components/script/dom/gpusampler.rs
new file mode 100644
index 00000000000..eab237a4c8f
--- /dev/null
+++ b/components/script/dom/gpusampler.rs
@@ -0,0 +1,77 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::cell::DomRefCell;
+use crate::dom::bindings::codegen::Bindings::GPUSamplerBinding::GPUSamplerMethods;
+use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::bindings::str::DOMString;
+use crate::dom::globalscope::GlobalScope;
+use dom_struct::dom_struct;
+use std::cell::Cell;
+use webgpu::{WebGPU, WebGPUDevice, WebGPUSampler};
+
+#[dom_struct]
+pub struct GPUSampler {
+    reflector_: Reflector,
+    #[ignore_malloc_size_of = "channels are hard"]
+    channel: WebGPU,
+    label: DomRefCell<Option<DOMString>>,
+    device: WebGPUDevice,
+    compare_enable: bool,
+    sampler: WebGPUSampler,
+    valid: Cell<bool>,
+}
+
+impl GPUSampler {
+    fn new_inherited(
+        channel: WebGPU,
+        device: WebGPUDevice,
+        compare_enable: bool,
+        sampler: WebGPUSampler,
+        valid: bool,
+    ) -> GPUSampler {
+        Self {
+            reflector_: Reflector::new(),
+            channel,
+            label: DomRefCell::new(None),
+            valid: Cell::new(valid),
+            device,
+            sampler,
+            compare_enable,
+        }
+    }
+
+    pub fn new(
+        global: &GlobalScope,
+        channel: WebGPU,
+        device: WebGPUDevice,
+        compare_enable: bool,
+        sampler: WebGPUSampler,
+        valid: bool,
+    ) -> DomRoot<GPUSampler> {
+        reflect_dom_object(
+            Box::new(GPUSampler::new_inherited(
+                channel,
+                device,
+                compare_enable,
+                sampler,
+                valid,
+            )),
+            global,
+        )
+    }
+}
+
+impl GPUSamplerMethods for GPUSampler {
+    /// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
+    fn GetLabel(&self) -> Option<DOMString> {
+        self.label.borrow().clone()
+    }
+
+    /// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
+    fn SetLabel(&self, value: Option<DOMString>) {
+        *self.label.borrow_mut() = value;
+    }
+}
diff --git a/components/script/dom/identityhub.rs b/components/script/dom/identityhub.rs
index 880d8e0b5f4..8ba21e36969 100644
--- a/components/script/dom/identityhub.rs
+++ b/components/script/dom/identityhub.rs
@@ -7,7 +7,7 @@ use webgpu::wgpu::{
     hub::IdentityManager,
     id::{
         AdapterId, BindGroupId, BindGroupLayoutId, BufferId, CommandEncoderId, ComputePipelineId,
-        DeviceId, PipelineLayoutId, ShaderModuleId,
+        DeviceId, PipelineLayoutId, SamplerId, ShaderModuleId,
     },
 };
 use webgpu::wgt::Backend;
@@ -23,11 +23,11 @@ pub struct IdentityHub {
     pipeline_layouts: IdentityManager,
     shader_modules: IdentityManager,
     command_encoders: IdentityManager,
-    backend: Backend,
+    samplers: IdentityManager,
 }
 
 impl IdentityHub {
-    fn new(backend: Backend) -> Self {
+    fn new() -> Self {
         IdentityHub {
             adapters: IdentityManager::default(),
             devices: IdentityManager::default(),
@@ -38,45 +38,9 @@ impl IdentityHub {
             pipeline_layouts: IdentityManager::default(),
             shader_modules: IdentityManager::default(),
             command_encoders: IdentityManager::default(),
-            backend,
+            samplers: IdentityManager::default(),
         }
     }
-
-    fn create_adapter_id(&mut self) -> AdapterId {
-        self.adapters.alloc(self.backend)
-    }
-
-    fn create_device_id(&mut self) -> DeviceId {
-        self.devices.alloc(self.backend)
-    }
-
-    fn create_buffer_id(&mut self) -> BufferId {
-        self.buffers.alloc(self.backend)
-    }
-
-    fn create_bind_group_id(&mut self) -> BindGroupId {
-        self.bind_groups.alloc(self.backend)
-    }
-
-    fn create_bind_group_layout_id(&mut self) -> BindGroupLayoutId {
-        self.bind_group_layouts.alloc(self.backend)
-    }
-
-    fn create_compute_pipeline_id(&mut self) -> ComputePipelineId {
-        self.compute_pipelines.alloc(self.backend)
-    }
-
-    fn create_pipeline_layout_id(&mut self) -> PipelineLayoutId {
-        self.pipeline_layouts.alloc(self.backend)
-    }
-
-    fn create_shader_module_id(&mut self) -> ShaderModuleId {
-        self.shader_modules.alloc(self.backend)
-    }
-
-    fn create_command_encoder_id(&mut self) -> CommandEncoderId {
-        self.command_encoders.alloc(self.backend)
-    }
 }
 
 #[derive(Debug)]
@@ -98,14 +62,14 @@ impl Identities {
         Identities {
             surface: IdentityManager::default(),
             #[cfg(any(target_os = "linux", target_os = "windows"))]
-            vk_hub: IdentityHub::new(Backend::Vulkan),
+            vk_hub: IdentityHub::new(),
             #[cfg(target_os = "windows")]
-            dx12_hub: IdentityHub::new(Backend::Dx12),
+            dx12_hub: IdentityHub::new(),
             #[cfg(target_os = "windows")]
-            dx11_hub: IdentityHub::new(Backend::Dx11),
+            dx11_hub: IdentityHub::new(),
             #[cfg(any(target_os = "ios", target_os = "macos"))]
-            metal_hub: IdentityHub::new(Backend::Metal),
-            dummy_hub: IdentityHub::new(Backend::Empty),
+            metal_hub: IdentityHub::new(),
+            dummy_hub: IdentityHub::new(),
         }
     }
 
@@ -123,22 +87,22 @@ impl Identities {
         }
     }
 
-    fn hubs(&mut self) -> Vec<&mut IdentityHub> {
+    fn hubs(&mut self) -> Vec<(&mut IdentityHub, Backend)> {
         vec![
             #[cfg(any(target_os = "linux", target_os = "windows"))]
-            &mut self.vk_hub,
+            (&mut self.vk_hub, Backend::Vulkan),
             #[cfg(target_os = "windows")]
-            &mut self.dx12_hub,
+            (&mut self.dx12_hub, Backend::Dx12),
             #[cfg(target_os = "windows")]
-            &mut self.dx11_hub,
+            (&mut self.dx11_hub, Backend::Dx11),
             #[cfg(any(target_os = "ios", target_os = "macos"))]
-            &mut self.metal_hub,
-            &mut self.dummy_hub,
+            (&mut self.metal_hub, Backend::Metal),
+            (&mut self.dummy_hub, Backend::Empty),
         ]
     }
 
     pub fn create_device_id(&mut self, backend: Backend) -> DeviceId {
-        self.select(backend).create_device_id()
+        self.select(backend).devices.alloc(backend)
     }
 
     pub fn kill_device_id(&mut self, id: DeviceId) {
@@ -147,8 +111,8 @@ impl Identities {
 
     pub fn create_adapter_ids(&mut self) -> SmallVec<[AdapterId; 4]> {
         let mut ids = SmallVec::new();
-        for hub in self.hubs() {
-            ids.push(hub.create_adapter_id())
+        for hubs in self.hubs() {
+            ids.push(hubs.0.adapters.alloc(hubs.1));
         }
         ids
     }
@@ -158,7 +122,7 @@ impl Identities {
     }
 
     pub fn create_buffer_id(&mut self, backend: Backend) -> BufferId {
-        self.select(backend).create_buffer_id()
+        self.select(backend).buffers.alloc(backend)
     }
 
     pub fn kill_buffer_id(&mut self, id: BufferId) {
@@ -166,7 +130,7 @@ impl Identities {
     }
 
     pub fn create_bind_group_id(&mut self, backend: Backend) -> BindGroupId {
-        self.select(backend).create_bind_group_id()
+        self.select(backend).bind_groups.alloc(backend)
     }
 
     pub fn kill_bind_group_id(&mut self, id: BindGroupId) {
@@ -174,7 +138,7 @@ impl Identities {
     }
 
     pub fn create_bind_group_layout_id(&mut self, backend: Backend) -> BindGroupLayoutId {
-        self.select(backend).create_bind_group_layout_id()
+        self.select(backend).bind_group_layouts.alloc(backend)
     }
 
     pub fn kill_bind_group_layout_id(&mut self, id: BindGroupLayoutId) {
@@ -182,7 +146,7 @@ impl Identities {
     }
 
     pub fn create_compute_pipeline_id(&mut self, backend: Backend) -> ComputePipelineId {
-        self.select(backend).create_compute_pipeline_id()
+        self.select(backend).compute_pipelines.alloc(backend)
     }
 
     pub fn kill_compute_pipeline_id(&mut self, id: ComputePipelineId) {
@@ -190,7 +154,7 @@ impl Identities {
     }
 
     pub fn create_pipeline_layout_id(&mut self, backend: Backend) -> PipelineLayoutId {
-        self.select(backend).create_pipeline_layout_id()
+        self.select(backend).pipeline_layouts.alloc(backend)
     }
 
     pub fn kill_pipeline_layout_id(&mut self, id: PipelineLayoutId) {
@@ -198,7 +162,7 @@ impl Identities {
     }
 
     pub fn create_shader_module_id(&mut self, backend: Backend) -> ShaderModuleId {
-        self.select(backend).create_shader_module_id()
+        self.select(backend).shader_modules.alloc(backend)
     }
 
     pub fn kill_shader_module_id(&mut self, id: ShaderModuleId) {
@@ -206,10 +170,18 @@ impl Identities {
     }
 
     pub fn create_command_encoder_id(&mut self, backend: Backend) -> CommandEncoderId {
-        self.select(backend).create_command_encoder_id()
+        self.select(backend).command_encoders.alloc(backend)
     }
 
     pub fn kill_command_buffer_id(&mut self, id: CommandEncoderId) {
         self.select(id.backend()).command_encoders.free(id);
     }
+
+    pub fn create_sampler_id(&mut self, backend: Backend) -> SamplerId {
+        self.select(backend).samplers.alloc(backend)
+    }
+
+    pub fn kill_sampler_id(&mut self, id: SamplerId) {
+        self.select(id.backend()).samplers.free(id);
+    }
 }
diff --git a/components/script/dom/mod.rs b/components/script/dom/mod.rs
index 9536f113417..f76bdc498ad 100644
--- a/components/script/dom/mod.rs
+++ b/components/script/dom/mod.rs
@@ -332,6 +332,7 @@ pub mod gpucomputepipeline;
 pub mod gpudevice;
 pub mod gpupipelinelayout;
 pub mod gpuqueue;
+pub mod gpusampler;
 pub mod gpushadermodule;
 pub mod gpushaderstage;
 pub mod hashchangeevent;
diff --git a/components/script/dom/webidls/GPUDevice.webidl b/components/script/dom/webidls/GPUDevice.webidl
index 9c7195c9b18..13f7ab37caa 100644
--- a/components/script/dom/webidls/GPUDevice.webidl
+++ b/components/script/dom/webidls/GPUDevice.webidl
@@ -14,7 +14,7 @@ interface GPUDevice : EventTarget {
     GPUBuffer createBuffer(GPUBufferDescriptor descriptor);
     GPUMappedBuffer createBufferMapped(GPUBufferDescriptor descriptor);
     // GPUTexture createTexture(GPUTextureDescriptor descriptor);
-    // GPUSampler createSampler(optional GPUSamplerDescriptor descriptor = {});
+    GPUSampler createSampler(optional GPUSamplerDescriptor descriptor = {});
 
     GPUBindGroupLayout createBindGroupLayout(GPUBindGroupLayoutDescriptor descriptor);
     GPUPipelineLayout createPipelineLayout(GPUPipelineLayoutDescriptor descriptor);
diff --git a/components/script/dom/webidls/GPUSampler.webidl b/components/script/dom/webidls/GPUSampler.webidl
new file mode 100644
index 00000000000..11673139e55
--- /dev/null
+++ b/components/script/dom/webidls/GPUSampler.webidl
@@ -0,0 +1,43 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+// https://gpuweb.github.io/gpuweb/#gpusampler
+[Exposed=(Window, DedicatedWorker), Pref="dom.webgpu.enabled"]
+interface GPUSampler {
+};
+GPUSampler includes GPUObjectBase;
+
+dictionary GPUSamplerDescriptor : GPUObjectDescriptorBase {
+    GPUAddressMode addressModeU = "clamp-to-edge";
+    GPUAddressMode addressModeV = "clamp-to-edge";
+    GPUAddressMode addressModeW = "clamp-to-edge";
+    GPUFilterMode magFilter = "nearest";
+    GPUFilterMode minFilter = "nearest";
+    GPUFilterMode mipmapFilter = "nearest";
+    float lodMinClamp = 0;
+    float lodMaxClamp = 0xfffff; // TODO: Update this. Value in spec was too big
+    GPUCompareFunction compare;
+};
+
+enum GPUAddressMode {
+    "clamp-to-edge",
+    "repeat",
+    "mirror-repeat"
+};
+
+enum GPUFilterMode {
+    "nearest",
+    "linear"
+};
+
+enum GPUCompareFunction {
+    "never",
+    "less",
+    "equal",
+    "less-equal",
+    "greater",
+    "not-equal",
+    "greater-equal",
+    "always"
+};