Bug 1940800: Spoof hardware support in RFP. r=tjr

Differential Revision: https://phabricator.services.mozilla.com/D233755
2025-01-22 23:46:32 +00:00
parent 6d9fe6d3bb
commit 6da71a1a9e
2 changed files with 8 additions and 0 deletions
--- a/dom/webgpu/Adapter.cpp
+++ b/dom/webgpu/Adapter.cpp
@@ -298,6 +298,13 @@ const RefPtr<SupportedLimits>& Adapter::Limits() const { return mLimits; }
 const RefPtr<AdapterInfo>& Adapter::Info() const { return mInfo; }

 bool Adapter::IsFallbackAdapter() const {
+  if (GetParentObject()->ShouldResistFingerprinting(
+          RFPTarget::WebGPUIsFallbackAdapter)) {
+    // Always report hardware support for WebGPU.
+    // This behaviour matches with media capabilities API.
+    return false;
+  }
+
  return mInfoInner->device_type == ffi::WGPUDeviceType::WGPUDeviceType_Cpu;
 }