1 files changed, 70 insertions, 0 deletions
diff --git a/gfx/webrender_bindings/RenderDcompSurfaceTextureHost.h b/gfx/webrender_bindings/RenderDcompSurfaceTextureHost.h
new file mode 100644
index 0000000000..7533e7c75f
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+++ b/gfx/webrender_bindings/RenderDcompSurfaceTextureHost.h
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+/* -*- Mode: C++; tab-width: ; 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_RENDERDCOMPSURFACETEXTUREHOST_H
+#define MOZILLA_GFX_RENDERDCOMPSURFACETEXTUREHOST_H
+
+#include "GLTypes.h"
+#include "RenderTextureHostSWGL.h"
+#include "mozilla/webrender/RenderThread.h"
+
+struct IDCompositionDevice;
+struct IDCompositionSurface;
+
+inline mozilla::LazyLogModule gDcompSurface("DcompSurface");
+
+namespace mozilla::wr {
+
+/**
+ * A render texture host is responsible to create a dcomp surface from an
+ * existing dcomp handle. Currently usage is that MF media engine will create
+ * a surface handle from another remote process, and we reconstruct the surface
+ * and use it in the DCLayerTree in the GPU process.
+ */
+class RenderDcompSurfaceTextureHost final : public RenderTextureHostSWGL {
+ public:
+  RenderDcompSurfaceTextureHost(HANDLE aHandle, gfx::IntSize aSize,
+                                gfx::SurfaceFormat aFormat);
+
+  // RenderTextureHost
+  RenderDcompSurfaceTextureHost* AsRenderDcompSurfaceTextureHost() override {
+    return this;
+  }
+
+  // RenderTextureHostSWGL
+  gfx::SurfaceFormat GetFormat() const override { return mFormat; }
+  gfx::ColorDepth GetColorDepth() const override {
+    return gfx::ColorDepth::COLOR_8;
+  }
+  size_t GetPlaneCount() const override { return 1; }
+  bool MapPlane(RenderCompositor* aCompositor, uint8_t aChannelIndex,
+                PlaneInfo& aPlaneInfo) override {
+    return false;
+  }
+  void UnmapPlanes() override {}
+  gfx::YUVRangedColorSpace GetYUVColorSpace() const override {
+    return gfx::YUVRangedColorSpace::GbrIdentity;
+  }
+  size_t Bytes() override { return 0; }
+
+  gfx::IntSize GetSize() const { return mSize; };
+
+  HANDLE GetDcompSurfaceHandle() const { return mHandle; }
+
+  // Not thread-safe. They should only be called on the renderer thread on the
+  // GPU process.
+  IDCompositionSurface* CreateSurfaceFromDevice(IDCompositionDevice* aDevice);
+  IDCompositionSurface* GetSurface() const { return mDcompSurface; };
+
+ private:
+  const HANDLE mHandle;
+  const gfx::IntSize mSize;
+  const gfx::SurfaceFormat mFormat;
+  RefPtr<IDCompositionSurface> mDcompSurface;
+};
+
+}  // namespace mozilla::wr
+
+#endif  // MOZILLA_GFX_RENDERDCOMPSURFACETEXTUREHOST_H