1 files changed, 57 insertions, 0 deletions
diff --git a/gfx/2d/SourceSurfaceDual.h b/gfx/2d/SourceSurfaceDual.h
new file mode 100644
index 0000000000..4125c3c59c
--- /dev/null
+++ b/gfx/2d/SourceSurfaceDual.h
@@ -0,0 +1,57 @@
+/* -*- 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_SOURCESURFACEDUAL_H_
+#define MOZILLA_GFX_SOURCESURFACEDUAL_H_
+
+#include "2D.h"
+
+namespace mozilla {
+namespace gfx {
+
+class DualSurface;
+class DualPattern;
+
+class SourceSurfaceDual : public SourceSurface {
+ public:
+  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(SourceSurfaceDual, override)
+
+  SourceSurfaceDual(DrawTarget* aDTA, DrawTarget* aDTB)
+      : mA(aDTA->Snapshot()), mB(aDTB->Snapshot()) {}
+
+  SourceSurfaceDual(SourceSurface* aSourceA, SourceSurface* aSourceB)
+      : mA(aSourceA), mB(aSourceB) {}
+
+  virtual SurfaceType GetType() const override { return SurfaceType::DUAL_DT; }
+  virtual IntSize GetSize() const override { return mA->GetSize(); }
+  virtual SurfaceFormat GetFormat() const override { return mA->GetFormat(); }
+
+  // TODO: This is probably wrong as this was originally only
+  // used for debugging purposes, but now has legacy relying on
+  // giving the first type only.
+  virtual already_AddRefed<DataSourceSurface> GetDataSurface() override {
+    return mA->GetDataSurface();
+  }
+
+  SourceSurface* GetFirstSurface() {
+    MOZ_ASSERT(mA->GetType() == mB->GetType());
+    return mA;
+  }
+
+  bool SameSurfaceTypes() { return mA->GetType() == mB->GetType(); }
+
+ private:
+  friend class DualSurface;
+  friend class DualPattern;
+
+  RefPtr<SourceSurface> mA;
+  RefPtr<SourceSurface> mB;
+};
+
+}  // namespace gfx
+}  // namespace mozilla
+
+#endif /* MOZILLA_GFX_SOURCESURFACEDUAL_H_ */