1 files changed, 50 insertions, 0 deletions
diff --git a/gfx/ipc/SharedDIB.h b/gfx/ipc/SharedDIB.h
new file mode 100644
index 0000000000..d957bb8269
--- /dev/null
+++ b/gfx/ipc/SharedDIB.h
@@ -0,0 +1,50 @@
+/* -*- 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/. */
+
+#ifndef gfx_SharedDIB_h__
+#define gfx_SharedDIB_h__
+
+#include "base/shared_memory.h"
+#include "nscore.h"
+
+namespace mozilla {
+namespace gfx {
+
+class SharedDIB {
+ public:
+  typedef base::SharedMemoryHandle Handle;
+
+  static const uint32_t kBytesPerPixel = 4;
+
+ public:
+  SharedDIB();
+  ~SharedDIB();
+
+  // Create and allocate a new shared dib.
+  nsresult Create(uint32_t aSize);
+
+  // Destroy or release resources associated with this dib.
+  nsresult Close();
+
+  // Returns true if this object contains a valid dib.
+  bool IsValid();
+
+  // Wrap a new shared dib around allocated shared memory. Note aHandle must
+  // point to a memory section large enough to hold a dib of size aSize,
+  // otherwise this will fail.
+  nsresult Attach(Handle aHandle, uint32_t aSize);
+
+  // Returns a SharedMemoryHandle suitable for sharing with another process.
+  nsresult ShareToProcess(base::ProcessId aTargetPid, Handle* aNewHandle);
+
+ protected:
+  base::SharedMemory* mShMem;
+};
+
+}  // namespace gfx
+}  // namespace mozilla
+
+#endif