Add GPUSupportedFeatures and update GPUSupportedLimits (#30359)

* GPUSupportedFeatures

* New supported limits

* Update expectations

1 files changed, 162 insertions, 0 deletions

diff --git a/components/script/dom/gpusupportedfeatures.rs b/components/script/dom/gpusupportedfeatures.rs
new file mode 100644
index 00000000000..bf6e5e8011a
--- /dev/null
+++ b/components/script/dom/gpusupportedfeatures.rs
@@ -0,0 +1,162 @@
+/* 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/. */
+
+// check-tidy: no specs after this line
+
+use std::str::FromStr;
+
+use dom_struct::dom_struct;
+use indexmap::IndexSet;
+use js::rust::HandleObject;
+use webgpu::wgt;
+
+use super::bindings::like::Setlike;
+use crate::dom::bindings::cell::DomRefCell;
+use crate::dom::bindings::codegen::Bindings::GPUAdapterBinding::GPUFeatureName;
+use crate::dom::bindings::codegen::Bindings::GPUAdapterBinding::GPUFeatureNameValues::pairs;
+use crate::dom::bindings::codegen::Bindings::GPUSupportedFeaturesBinding::GPUSupportedFeaturesMethods;
+use crate::dom::bindings::error::Fallible;
+use crate::dom::bindings::reflector::{reflect_dom_object_with_proto, Reflector};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::bindings::str::DOMString;
+use crate::dom::globalscope::GlobalScope;
+
+// manual hash derived
+// TODO: allow derivables in bindings.conf
+impl std::hash::Hash for GPUFeatureName {
+    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+        core::mem::discriminant(self).hash(state);
+    }
+}
+
+impl Eq for GPUFeatureName {}
+
+#[dom_struct]
+pub struct GPUSupportedFeatures {
+    reflector: Reflector,
+    // internal storage for features
+    #[custom_trace]
+    internal: DomRefCell<IndexSet<GPUFeatureName>>,
+}
+
+impl GPUSupportedFeatures {
+    fn new(
+        global: &GlobalScope,
+        proto: Option<HandleObject>,
+        features: wgt::Features,
+    ) -> DomRoot<GPUSupportedFeatures> {
+        let mut set = IndexSet::new();
+        if features.contains(wgt::Features::DEPTH_CLIP_CONTROL) {
+            set.insert(GPUFeatureName::Depth_clip_control);
+        }
+        if features.contains(wgt::Features::DEPTH32FLOAT_STENCIL8) {
+            set.insert(GPUFeatureName::Depth32float_stencil8);
+        }
+        if features.contains(wgt::Features::PIPELINE_STATISTICS_QUERY) {
+            set.insert(GPUFeatureName::Pipeline_statistics_query);
+        }
+        if features.contains(wgt::Features::TEXTURE_COMPRESSION_BC) {
+            set.insert(GPUFeatureName::Texture_compression_bc);
+        }
+        if features.contains(wgt::Features::TEXTURE_COMPRESSION_ETC2) {
+            set.insert(GPUFeatureName::Texture_compression_etc2);
+        }
+        if features.contains(wgt::Features::TEXTURE_COMPRESSION_ASTC) {
+            set.insert(GPUFeatureName::Texture_compression_astc);
+        }
+        if features.contains(wgt::Features::TIMESTAMP_QUERY) {
+            set.insert(GPUFeatureName::Timestamp_query);
+        }
+        if features.contains(wgt::Features::INDIRECT_FIRST_INSTANCE) {
+            set.insert(GPUFeatureName::Indirect_first_instance);
+        }
+        reflect_dom_object_with_proto(
+            Box::new(GPUSupportedFeatures {
+                reflector: Reflector::new(),
+                internal: DomRefCell::new(set),
+            }),
+            global,
+            proto,
+        )
+    }
+
+    #[allow(non_snake_case)]
+    pub fn Constructor(
+        global: &GlobalScope,
+        proto: Option<HandleObject>,
+        features: wgt::Features,
+    ) -> Fallible<DomRoot<GPUSupportedFeatures>> {
+        Ok(GPUSupportedFeatures::new(global, proto, features))
+    }
+}
+
+impl GPUSupportedFeaturesMethods for GPUSupportedFeatures {
+    fn Size(&self) -> u32 {
+        self.internal.size()
+    }
+}
+
+pub fn gpu_to_wgt_feature(feature: GPUFeatureName) -> Option<wgt::Features> {
+    match feature {
+        GPUFeatureName::Depth_clip_control => Some(wgt::Features::DEPTH_CLIP_CONTROL),
+        GPUFeatureName::Depth24unorm_stencil8 => None,
+        GPUFeatureName::Depth32float_stencil8 => Some(wgt::Features::DEPTH32FLOAT_STENCIL8),
+        GPUFeatureName::Pipeline_statistics_query => Some(wgt::Features::PIPELINE_STATISTICS_QUERY),
+        GPUFeatureName::Texture_compression_bc => Some(wgt::Features::TEXTURE_COMPRESSION_BC),
+        GPUFeatureName::Texture_compression_etc2 => Some(wgt::Features::TEXTURE_COMPRESSION_ETC2),
+        GPUFeatureName::Texture_compression_astc => Some(wgt::Features::TEXTURE_COMPRESSION_ASTC),
+        GPUFeatureName::Timestamp_query => Some(wgt::Features::TIMESTAMP_QUERY),
+        GPUFeatureName::Indirect_first_instance => Some(wgt::Features::INDIRECT_FIRST_INSTANCE),
+    }
+}
+
+// this should be autogenerate by bindings
+impl FromStr for GPUFeatureName {
+    type Err = ();
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        pairs
+            .iter()
+            .find(|&&(key, _)| s == key)
+            .map(|&(_, ev)| ev)
+            .ok_or(())
+    }
+}
+
+// this error is wrong because if we inline Self::Key and Self::Value all errors are gone
+#[allow(unrooted_must_root)]
+impl Setlike for GPUSupportedFeatures {
+    type Key = DOMString;
+
+    #[inline(always)]
+    fn get_index(&self, index: u32) -> Option<Self::Key> {
+        self.internal
+            .get_index(index)
+            .map(|k| DOMString::from_string(k.as_str().to_owned()))
+    }
+    #[inline(always)]
+    fn size(&self) -> u32 {
+        self.internal.size()
+    }
+    #[inline(always)]
+    fn add(&self, _key: Self::Key) {
+        unreachable!("readonly");
+    }
+    #[inline(always)]
+    fn has(&self, key: Self::Key) -> bool {
+        if let Ok(key) = key.parse() {
+            self.internal.has(key)
+        } else {
+            false
+        }
+    }
+    #[inline(always)]
+    fn clear(&self) {
+        unreachable!("readonly");
+    }
+    #[inline(always)]
+    fn delete(&self, _key: Self::Key) -> bool {
+        unreachable!("readonly");
+    }
+}