gfx/webrender_bindings/RenderDcompSurfaceTextureHost.h

   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