gfx/webrender_bindings/RenderTextureHostSWGL.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_RENDERTEXTUREHOSTSWGL_H
   8 #define MOZILLA_GFX_RENDERTEXTUREHOSTSWGL_H
   9
  10 #include "GLTypes.h"
  11 #include "RenderTextureHost.h"
  12
  13 namespace mozilla {
  14 namespace wr {
  15
  16 class RenderTextureHostSWGL : public RenderTextureHost {
  17  public:
  18   RenderTextureHostSWGL() {}
  19
  20   wr::WrExternalImage LockSWGL(uint8_t aChannelIndex, void* aContext,
  21                                RenderCompositor* aCompositor,
  22                                wr::ImageRendering aRendering) override;
  23
  24   void UnlockSWGL() override;
  25
  26   RenderTextureHostSWGL* AsRenderTextureHostSWGL() override { return this; }
  27
  28   virtual size_t GetPlaneCount() const = 0;
  29
  30   virtual gfx::SurfaceFormat GetFormat() const = 0;
  31
  32   virtual gfx::ColorDepth GetColorDepth() const {
  33     return gfx::ColorDepth::UNKNOWN;
  34   }
  35
  36   virtual gfx::YUVColorSpace GetYUVColorSpace() const {
  37     return gfx::YUVColorSpace::UNKNOWN;
  38   }
  39
  40   struct PlaneInfo {
  41     explicit PlaneInfo(GLuint aTexture) : mTexture(aTexture) {}
  42
  43     GLuint mTexture = 0;
  44     void* mData = nullptr;
  45     int32_t mStride = 0;
  46     gfx::IntSize mSize;
  47   };
  48
  49   virtual bool MapPlane(RenderCompositor* aCompositor, uint8_t aChannelIndex,
  50                         PlaneInfo& aPlaneInfo) = 0;
  51
  52   virtual void UnmapPlanes() = 0;
  53
  54   // Lock this texture host as an attached external image for a SWGL compositor
  55   // surface. See swgl_bindings.rs for a description of the resulting
  56   // WrSWGLCompositeSurfaceInfo. This is paired with a call to UnlockSWGL when
  57   // composition is done.
  58   bool LockSWGLCompositeSurface(void* aContext,
  59                                 wr::WrSWGLCompositeSurfaceInfo* aInfo);
  60
  61   size_t Bytes() override {
  62     size_t bytes = 0;
  63     for (auto &plane : mPlanes) {
  64       bytes += plane.mStride * plane.mSize.height;
  65     }
  66     return bytes;
  67   }
  68  protected:
  69   bool mLocked = false;
  70   void* mContext = nullptr;
  71   std::vector<PlaneInfo> mPlanes;
  72
  73   bool SetContext(void* aContext);
  74
  75   bool UpdatePlanes(RenderCompositor* aCompositor,
  76                     wr::ImageRendering aRendering);
  77
  78   void CleanupPlanes();
  79
  80   virtual ~RenderTextureHostSWGL();
  81 };
  82
  83 }  // namespace wr
  84 }  // namespace mozilla
  85
  86 #endif  // MOZILLA_GFX_RENDERTEXTUREHOSTSWGL_H