gfx/webrender_bindings/RenderTextureHostWrapper.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef MOZILLA_GFX_RENDERTEXTUREHOSTWRAPPER_H
   8 #define MOZILLA_GFX_RENDERTEXTUREHOSTWRAPPER_H
   9
  10 #include "RenderTextureHostSWGL.h"
  11
  12 namespace mozilla {
  13
  14 namespace wr {
  15
  16 /**
  17  * RenderTextureHost of GPUVideoTextureHost.
  18  *
  19  * GPUVideoTextureHost wraps TextureHost. This class wraps RenderTextureHost of
  20  * the wrapped TextureHost. Lifetime of the wrapped TextureHost is usually
  21  * longer than GPUVideoTextureHost and the wrapped TextureHost is used by
  22  * multiple GPUVideoTextureHosts. This class is used to reduce recreations of
  23  * the wrappded RenderTextureHost. Initializations of some
  24  * RenderTextureHosts(RenderDXGITextureHost and
  25  * RenderDXGIYCbCrTextureHost) have overhead.
  26  */
  27 class RenderTextureHostWrapper final : public RenderTextureHostSWGL {
  28  public:
  29   explicit RenderTextureHostWrapper(ExternalImageId aExternalImageId);
  30
  31   // RenderTextureHost
  32   wr::WrExternalImage Lock(uint8_t aChannelIndex, gl::GLContext* aGL,
  33                            wr::ImageRendering aRendering) override;
  34   void Unlock() override;
  35   void ClearCachedResources() override;
  36   RenderMacIOSurfaceTextureHost* AsRenderMacIOSurfaceTextureHost() override;
  37   RenderDXGITextureHost* AsRenderDXGITextureHost() override;
  38   RenderDXGIYCbCrTextureHost* AsRenderDXGIYCbCrTextureHost() override;
  39
  40   // RenderTextureHostSWGL
  41   size_t GetPlaneCount() const override;
  42   gfx::SurfaceFormat GetFormat() const override;
  43   gfx::ColorDepth GetColorDepth() const override;
  44   gfx::YUVColorSpace GetYUVColorSpace() const override;
  45   bool MapPlane(RenderCompositor* aCompositor, uint8_t aChannelIndex,
  46                 PlaneInfo& aPlaneInfo) override;
  47   void UnmapPlanes() override;
  48
  49   // This is just a wrapper, so doesn't need to report the
  50   // size of the wrapped object (which reports itself).
  51   size_t Bytes() override { return 0; }
  52
  53  private:
  54   ~RenderTextureHostWrapper() override;
  55
  56   void EnsureTextureHost() const;
  57   RenderTextureHostSWGL* EnsureRenderTextureHostSWGL() const;
  58
  59   const ExternalImageId mExternalImageId;
  60   mutable RefPtr<RenderTextureHost> mTextureHost;
  61 };
  62
  63 }  // namespace wr
  64 }  // namespace mozilla
  65
  66 #endif  // MOZILLA_GFX_RENDERTEXTUREHOSTWRAPPER_H