1 files changed, 53 insertions, 0 deletions
diff --git a/dom/webgpu/Utility.cpp b/dom/webgpu/Utility.cpp
new file mode 100644
index 0000000000..8c8a03866b
--- /dev/null
+++ b/dom/webgpu/Utility.cpp
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "Utility.h"
+#include "mozilla/dom/WebGPUBinding.h"
+#include "mozilla/webgpu/ffi/wgpu.h"
+#include "mozilla/webgpu/WebGPUTypes.h"
+
+namespace mozilla::webgpu {
+
+template <typename E>
+void ConvertToExtent3D(const E& aExtent, ffi::WGPUExtent3d* aExtentFFI) {
+  *aExtentFFI = {};
+  if (aExtent.IsRangeEnforcedUnsignedLongSequence()) {
+    const auto& seq = aExtent.GetAsRangeEnforcedUnsignedLongSequence();
+    aExtentFFI->width = seq.Length() > 0 ? seq[0] : 0;
+    aExtentFFI->height = seq.Length() > 1 ? seq[1] : 1;
+    aExtentFFI->depth_or_array_layers = seq.Length() > 2 ? seq[2] : 1;
+  } else if (aExtent.IsGPUExtent3DDict()) {
+    const auto& dict = aExtent.GetAsGPUExtent3DDict();
+    aExtentFFI->width = dict.mWidth;
+    aExtentFFI->height = dict.mHeight;
+    aExtentFFI->depth_or_array_layers = dict.mDepthOrArrayLayers;
+  } else {
+    MOZ_CRASH("Unexpected extent type");
+  }
+}
+
+void ConvertExtent3DToFFI(const dom::GPUExtent3D& aExtent,
+                          ffi::WGPUExtent3d* aExtentFFI) {
+  ConvertToExtent3D(aExtent, aExtentFFI);
+}
+
+void ConvertExtent3DToFFI(const dom::OwningGPUExtent3D& aExtent,
+                          ffi::WGPUExtent3d* aExtentFFI) {
+  ConvertToExtent3D(aExtent, aExtentFFI);
+}
+
+ffi::WGPUExtent3d ConvertExtent(const dom::GPUExtent3D& aExtent) {
+  ffi::WGPUExtent3d extent = {};
+  ConvertToExtent3D(aExtent, &extent);
+  return extent;
+}
+
+ffi::WGPUExtent3d ConvertExtent(const dom::OwningGPUExtent3D& aExtent) {
+  ffi::WGPUExtent3d extent = {};
+  ConvertToExtent3D(aExtent, &extent);
+  return extent;
+}
+
+}  // namespace mozilla::webgpu