1 files changed, 55 insertions, 0 deletions
diff --git a/gfx/ipc/SharedDIB.cpp b/gfx/ipc/SharedDIB.cpp
new file mode 100644
index 0000000000..7da3a39b3b
--- /dev/null
+++ b/gfx/ipc/SharedDIB.cpp
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "SharedDIB.h"
+
+namespace mozilla {
+namespace gfx {
+
+SharedDIB::SharedDIB() : mShMem(nullptr) {}
+
+SharedDIB::~SharedDIB() { Close(); }
+
+nsresult SharedDIB::Create(uint32_t aSize) {
+  Close();
+
+  mShMem = new base::SharedMemory();
+  if (!mShMem || !mShMem->Create(aSize)) return NS_ERROR_OUT_OF_MEMORY;
+
+  return NS_OK;
+}
+
+bool SharedDIB::IsValid() { return mShMem && mShMem->IsValid(); }
+
+nsresult SharedDIB::Close() {
+  delete mShMem;
+
+  mShMem = nullptr;
+
+  return NS_OK;
+}
+
+nsresult SharedDIB::Attach(Handle aHandle, uint32_t aSize) {
+  Close();
+
+  mShMem = new base::SharedMemory(aHandle, false);
+  if (!mShMem) return NS_ERROR_OUT_OF_MEMORY;
+
+  return NS_OK;
+}
+
+nsresult SharedDIB::ShareToProcess(base::ProcessId aTargetPid,
+                                   Handle* aNewHandle) {
+  if (!mShMem) return NS_ERROR_UNEXPECTED;
+
+  if (!mShMem->ShareToProcess(aTargetPid, aNewHandle))
+    return NS_ERROR_UNEXPECTED;
+
+  return NS_OK;
+}
+
+}  // namespace gfx
+}  // namespace mozilla