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) override;
  22
  23   void UnlockSWGL() override;
  24
  25   RenderTextureHostSWGL* AsRenderTextureHostSWGL() override { return this; }
  26
  27   virtual size_t GetPlaneCount() const = 0;
  28
  29   virtual gfx::ColorDepth GetColorDepth() const {
  30     return gfx::ColorDepth::COLOR_8;
  31   }
  32
  33   struct PlaneInfo {
  34     explicit PlaneInfo(GLuint aTexture) : mTexture(aTexture) {}
  35
  36     GLuint mTexture = 0;
  37     void* mData = nullptr;
  38     int32_t mStride = 0;
  39     gfx::IntSize mSize;
  40   };
  41
  42   virtual bool MapPlane(RenderCompositor* aCompositor, uint8_t aChannelIndex,
  43                         PlaneInfo& aPlaneInfo) = 0;
  44
  45   virtual void UnmapPlanes() = 0;
  46
  47   // Lock this texture host as an attached external image for a SWGL compositor
  48   // surface. See swgl_bindings.rs for a description of the resulting
  49   // WrSWGLCompositeSurfaceInfo. This is paired with a call to UnlockSWGL when
  50   // composition is done.
  51   bool LockSWGLCompositeSurface(void* aContext,
  52                                 wr::SWGLCompositeSurfaceInfo* aInfo);
  53
  54   size_t BytesFromPlanes() {
  55     NS_ASSERTION(mPlanes.size(), "Can't compute bytes without any planes");
  56     size_t bytes = 0;
  57     for (auto& plane : mPlanes) {
  58       bytes += plane.mStride * plane.mSize.height;
  59     }
  60     return bytes;
  61   }
  62
  63  protected:
  64   bool mLocked = false;
  65   void* mContext = nullptr;
  66   std::vector<PlaneInfo> mPlanes;
  67
  68   bool SetContext(void* aContext);
  69
  70   bool UpdatePlanes(RenderCompositor* aCompositor);
  71
  72   void CleanupPlanes();
  73
  74   virtual ~RenderTextureHostSWGL();
  75 };
  76
  77 }  // namespace wr
  78 }  // namespace mozilla
  79
  80 #endif  // MOZILLA_GFX_RENDERTEXTUREHOSTSWGL_H