1 files changed, 70 insertions, 0 deletions
diff --git a/gfx/thebes/gfxPlatformWorker.cpp b/gfx/thebes/gfxPlatformWorker.cpp
new file mode 100644
index 0000000000..1a6183236e
--- /dev/null
+++ b/gfx/thebes/gfxPlatformWorker.cpp
@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 20; 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 "gfxPlatformWorker.h"
+#include "mozilla/dom/WorkerCommon.h"
+#include "mozilla/dom/WorkerRef.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/ThreadLocal.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+using namespace mozilla::gfx;
+
+MOZ_THREAD_LOCAL(gfxPlatformWorker*) gfxPlatformWorker::sInstance;
+
+/* static */ gfxPlatformWorker* gfxPlatformWorker::Get() {
+  if (!sInstance.init()) {
+    return nullptr;
+  }
+
+  gfxPlatformWorker* instance = sInstance.get();
+  if (instance) {
+    return instance;
+  }
+
+  WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
+  if (!workerPrivate) {
+    return nullptr;
+  }
+
+  RefPtr<WeakWorkerRef> workerRef = WeakWorkerRef::Create(
+      workerPrivate, []() { gfxPlatformWorker::Shutdown(); });
+  if (!workerRef) {
+    return nullptr;
+  }
+
+  instance = new gfxPlatformWorker(std::move(workerRef));
+  sInstance.set(instance);
+  return instance;
+}
+
+/* static */ void gfxPlatformWorker::Shutdown() {
+  if (!sInstance.init()) {
+    return;
+  }
+
+  gfxPlatformWorker* instance = sInstance.get();
+  if (!instance) {
+    return;
+  }
+
+  sInstance.set(nullptr);
+  delete instance;
+}
+
+gfxPlatformWorker::gfxPlatformWorker(RefPtr<WeakWorkerRef>&& aWorkerRef)
+    : mWorkerRef(std::move(aWorkerRef)) {}
+
+gfxPlatformWorker::~gfxPlatformWorker() = default;
+
+RefPtr<mozilla::gfx::DrawTarget>
+gfxPlatformWorker::ScreenReferenceDrawTarget() {
+  if (!mScreenReferenceDrawTarget) {
+    mScreenReferenceDrawTarget = Factory::CreateDrawTarget(
+        BackendType::SKIA, IntSize(1, 1), SurfaceFormat::B8G8R8A8);
+  }
+  return mScreenReferenceDrawTarget;
+}