1 files changed, 62 insertions, 0 deletions
diff --git a/gfx/ipc/SharedDIBSurface.h b/gfx/ipc/SharedDIBSurface.h
new file mode 100644
index 0000000000..412aeb89c5
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+++ b/gfx/ipc/SharedDIBSurface.h
@@ -0,0 +1,62 @@
+/* -*- 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 mozilla_gfx_SharedDIBSurface_h
+#define mozilla_gfx_SharedDIBSurface_h
+
+#include "gfxImageSurface.h"
+#include "SharedDIBWin.h"
+
+#include <windows.h>
+
+namespace mozilla {
+namespace gfx {
+
+/**
+ * A SharedDIBSurface owns an underlying SharedDIBWin.
+ */
+class SharedDIBSurface : public gfxImageSurface {
+ public:
+  typedef base::SharedMemoryHandle Handle;
+
+  SharedDIBSurface() {}
+  ~SharedDIBSurface() {}
+
+  /**
+   * Create this image surface backed by shared memory.
+   */
+  bool Create(HDC adc, uint32_t aWidth, uint32_t aHeight, bool aTransparent);
+
+  /**
+   * Attach this surface to shared memory from another process.
+   */
+  bool Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight,
+              bool aTransparent);
+
+  /**
+   * After drawing to a surface via GDI, GDI must be flushed before the bitmap
+   * is valid.
+   */
+  void Flush() { ::GdiFlush(); }
+
+  HDC GetHDC() { return mSharedDIB.GetHDC(); }
+
+  nsresult ShareToProcess(base::ProcessId aTargetPid, Handle* aNewHandle) {
+    return mSharedDIB.ShareToProcess(aTargetPid, aNewHandle);
+  }
+
+  static bool IsSharedDIBSurface(gfxASurface* aSurface);
+
+ private:
+  SharedDIBWin mSharedDIB;
+
+  void InitSurface(uint32_t aWidth, uint32_t aHeight, bool aTransparent);
+};
+
+}  // namespace gfx
+}  // namespace mozilla
+
+#endif  // mozilla_gfx_SharedDIBSurface_h