3 files changed, 44 insertions, 2 deletions
diff --git a/components/script/dom/webidls/GPUBuffer.webidl b/components/script/dom/webidls/GPUBuffer.webidl
new file mode 100644
index 00000000000..0b327bdcbd2
--- /dev/null
+++ b/components/script/dom/webidls/GPUBuffer.webidl
@@ -0,0 +1,25 @@
+/* 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/#gpubuffer
+[Exposed=(Window, DedicatedWorker), Serializable, Pref="dom.webgpu.enabled"]
+interface GPUBuffer {
+    // Promise<ArrayBuffer> mapReadAsync();
+    // Promise<ArrayBuffer> mapWriteAsync();
+    void unmap();
+
+    void destroy();
+};
+GPUBuffer includes GPUObjectBase;
+
+dictionary GPUBufferDescriptor : GPUObjectDescriptorBase {
+    required GPUBufferSize size;
+    required GPUBufferUsageFlags usage;
+};
+
+typedef unsigned long long GPUBufferSize;
+
+typedef unsigned long GPUBufferUsageFlags;
+
+typedef sequence<any> GPUMappedBuffer;
diff --git a/components/script/dom/webidls/GPUBufferUsage.webidl b/components/script/dom/webidls/GPUBufferUsage.webidl
new file mode 100644
index 00000000000..549f6652d1f
--- /dev/null
+++ b/components/script/dom/webidls/GPUBufferUsage.webidl
@@ -0,0 +1,17 @@
+/* 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/#buffer-usage
+[Exposed=(Window, DedicatedWorker), Pref="dom.webgpu.enabled"]
+interface GPUBufferUsage {
+    const GPUBufferUsageFlags MAP_READ  = 0x0001;
+    const GPUBufferUsageFlags MAP_WRITE = 0x0002;
+    const GPUBufferUsageFlags COPY_SRC  = 0x0004;
+    const GPUBufferUsageFlags COPY_DST  = 0x0008;
+    const GPUBufferUsageFlags INDEX     = 0x0010;
+    const GPUBufferUsageFlags VERTEX    = 0x0020;
+    const GPUBufferUsageFlags UNIFORM   = 0x0040;
+    const GPUBufferUsageFlags STORAGE   = 0x0080;
+    const GPUBufferUsageFlags INDIRECT  = 0x0100;
+};
diff --git a/components/script/dom/webidls/GPUDevice.webidl b/components/script/dom/webidls/GPUDevice.webidl
index 1cd441e6ef3..965f7e1b7d5 100644
--- a/components/script/dom/webidls/GPUDevice.webidl
+++ b/components/script/dom/webidls/GPUDevice.webidl
@@ -9,9 +9,9 @@ interface GPUDevice : EventTarget {
     readonly attribute object extensions;
     readonly attribute object limits;
 
-    /*GPUBuffer createBuffer(GPUBufferDescriptor descriptor);
+    GPUBuffer createBuffer(GPUBufferDescriptor descriptor);
     GPUMappedBuffer createBufferMapped(GPUBufferDescriptor descriptor);
-    Promise<GPUMappedBuffer> createBufferMappedAsync(GPUBufferDescriptor descriptor);
+    /*Promise<GPUMappedBuffer> createBufferMappedAsync(GPUBufferDescriptor descriptor);
     GPUTexture createTexture(GPUTextureDescriptor descriptor);
     GPUSampler createSampler(optional GPUSamplerDescriptor descriptor = {});