1 files changed, 50 insertions, 0 deletions
diff --git a/gfx/webrender_bindings/RenderDcompSurfaceTextureHost.cpp b/gfx/webrender_bindings/RenderDcompSurfaceTextureHost.cpp
new file mode 100644
index 0000000000..999421e793
--- /dev/null
+++ b/gfx/webrender_bindings/RenderDcompSurfaceTextureHost.cpp
@@ -0,0 +1,50 @@
+/* -*- Mode: C++; tab-width: 2; 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 "RenderDcompSurfaceTextureHost.h"
+
+#undef _WIN32_WINNT
+#define _WIN32_WINNT _WIN32_WINNT_WINBLUE
+#undef NTDDI_VERSION
+#define NTDDI_VERSION NTDDI_WINBLUE
+
+#include <dcomp.h>
+
+#define LOG(msg, ...)                                                        \
+  MOZ_LOG(gDcompSurface, LogLevel::Debug,                                    \
+          ("RenderDcompSurfaceTextureHost=%p, handle=%p, size=[%u,%u] " msg, \
+           this, this->mHandle, this->mSize.Width(), this->mSize.Height(),   \
+           ##__VA_ARGS__))
+
+namespace mozilla::wr {
+
+RenderDcompSurfaceTextureHost::RenderDcompSurfaceTextureHost(
+    HANDLE aHandle, gfx::IntSize aSize, gfx::SurfaceFormat aFormat)
+    : mHandle(aHandle), mSize(aSize), mFormat(aFormat) {
+  MOZ_ASSERT(aHandle && aHandle != INVALID_HANDLE_VALUE);
+}
+
+IDCompositionSurface* RenderDcompSurfaceTextureHost::CreateSurfaceFromDevice(
+    IDCompositionDevice* aDevice) {
+  // Already created surface, no need to recreate it again.
+  if (mDcompSurface) {
+    return mDcompSurface;
+  }
+
+  auto* surface =
+      static_cast<IDCompositionSurface**>(getter_AddRefs(mDcompSurface));
+  auto hr = aDevice->CreateSurfaceFromHandle(
+      mHandle, reinterpret_cast<IUnknown**>(surface));
+  if (FAILED(hr)) {
+    LOG("Failed to create surface from Dcomp handle %p, hr=%lx", mHandle, hr);
+    return nullptr;
+  }
+  LOG("Created surface %p correctly", surface);
+  return mDcompSurface;
+}
+
+}  // namespace mozilla::wr
+
+#undef LOG