tor-browser

The Tor Browser
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RenderDcompSurfaceTextureHost.h (2430B)

      1 /* -*- Mode: C++; tab-width: ; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 #ifndef MOZILLA_GFX_RENDERDCOMPSURFACETEXTUREHOST_H
      7 #define MOZILLA_GFX_RENDERDCOMPSURFACETEXTUREHOST_H
      8 
      9 #include "GLTypes.h"
     10 #include "RenderTextureHostSWGL.h"
     11 #include "mozilla/webrender/RenderThread.h"
     12 
     13 struct IDCompositionDevice;
     14 struct IDCompositionSurface;
     15 
     16 inline mozilla::LazyLogModule gDcompSurface("DcompSurface");
     17 
     18 namespace mozilla::wr {
     19 
     20 /**
     21 * A render texture host is responsible to create a dcomp surface from an
     22 * existing dcomp handle. Currently usage is that MF media engine will create
     23 * a surface handle from another remote process, and we reconstruct the surface
     24 * and use it in the DCLayerTree in the GPU process.
     25 */
     26 class RenderDcompSurfaceTextureHost final : public RenderTextureHostSWGL {
     27 public:
     28  RenderDcompSurfaceTextureHost(HANDLE aHandle, gfx::IntSize aSize,
     29                                gfx::SurfaceFormat aFormat);
     30 
     31  // RenderTextureHost
     32  RenderDcompSurfaceTextureHost* AsRenderDcompSurfaceTextureHost() override {
     33    return this;
     34  }
     35 
     36  // RenderTextureHostSWGL
     37  gfx::SurfaceFormat GetFormat() const override { return mFormat; }
     38  gfx::ColorDepth GetColorDepth() const override {
     39    return gfx::ColorDepth::COLOR_8;
     40  }
     41  size_t GetPlaneCount() const override { return 1; }
     42  bool MapPlane(RenderCompositor* aCompositor, uint8_t aChannelIndex,
     43                PlaneInfo& aPlaneInfo) override {
     44    return false;
     45  }
     46  void UnmapPlanes() override {}
     47  gfx::YUVRangedColorSpace GetYUVColorSpace() const override {
     48    return gfx::YUVRangedColorSpace::GbrIdentity;
     49  }
     50  size_t Bytes() override { return 0; }
     51 
     52  gfx::IntSize GetSize() const { return mSize; };
     53 
     54  HANDLE GetDcompSurfaceHandle() const { return mHandle; }
     55 
     56  // Not thread-safe. They should only be called on the renderer thread on the
     57  // GPU process.
     58  IDCompositionSurface* CreateSurfaceFromDevice(IDCompositionDevice* aDevice);
     59  IDCompositionSurface* GetSurface() const { return mDcompSurface; };
     60 
     61 private:
     62  const HANDLE mHandle;
     63  const gfx::IntSize mSize;
     64  const gfx::SurfaceFormat mFormat;
     65  RefPtr<IDCompositionSurface> mDcompSurface;
     66 };
     67 
     68 }  // namespace mozilla::wr
     69 
     70 #endif  // MOZILLA_GFX_RENDERDCOMPSURFACETEXTUREHOST_H