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-rw-r--r--gfx/2d/DataSourceSurfaceWrapper.h39
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diff --git a/gfx/2d/DataSourceSurfaceWrapper.h b/gfx/2d/DataSourceSurfaceWrapper.h
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+/* -*- 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/. */
+
+#ifndef MOZILLA_GFX_DATASOURCESURFACEWRAPPER_H_
+#define MOZILLA_GFX_DATASOURCESURFACEWRAPPER_H_
+
+#include "2D.h"
+
+namespace mozilla {
+namespace gfx {
+
+// Wraps a DataSourceSurface and forwards all methods except for GetType(),
+// from which it always returns SurfaceType::DATA.
+class DataSourceSurfaceWrapper : public DataSourceSurface
+{
+public:
+ MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceWrapper, override)
+ explicit DataSourceSurfaceWrapper(DataSourceSurface *aSurface)
+ : mSurface(aSurface)
+ {}
+
+ virtual SurfaceType GetType() const override { return SurfaceType::DATA; }
+
+ virtual uint8_t *GetData() override { return mSurface->GetData(); }
+ virtual int32_t Stride() override { return mSurface->Stride(); }
+ virtual IntSize GetSize() const override { return mSurface->GetSize(); }
+ virtual SurfaceFormat GetFormat() const override { return mSurface->GetFormat(); }
+ virtual bool IsValid() const override { return mSurface->IsValid(); }
+
+private:
+ RefPtr<DataSourceSurface> mSurface;
+};
+
+} // namespace gfx
+} // namespace mozilla
+
+#endif /* MOZILLA_GFX_DATASOURCESURFACEWRAPPER_H_ */