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       1             : /* -*- Mode: C++; tab-width: 20; 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_BASICCOMPOSITOR_H
       7             : #define MOZILLA_GFX_BASICCOMPOSITOR_H
       8             : 
       9             : #include "mozilla/layers/Compositor.h"
      10             : #include "mozilla/layers/TextureHost.h"
      11             : #include "mozilla/gfx/2D.h"
      12             : #include "mozilla/gfx/Triangle.h"
      13             : #include "mozilla/gfx/Polygon.h"
      14             : 
      15             : namespace mozilla {
      16             : namespace layers {
      17             : 
      18          81 : class BasicCompositingRenderTarget : public CompositingRenderTarget
      19             : {
      20             : public:
      21          27 :   BasicCompositingRenderTarget(gfx::DrawTarget* aDrawTarget, const gfx::IntRect& aRect)
      22          54 :     : CompositingRenderTarget(aRect.TopLeft())
      23             :     , mDrawTarget(aDrawTarget)
      24          54 :     , mSize(aRect.Size())
      25          27 :   { }
      26             : 
      27           0 :   virtual const char* Name() const override { return "BasicCompositingRenderTarget"; }
      28             : 
      29           0 :   virtual gfx::IntSize GetSize() const override { return mSize; }
      30             : 
      31             :   void BindRenderTarget();
      32             : 
      33           0 :   virtual gfx::SurfaceFormat GetFormat() const override
      34             :   {
      35           0 :     return mDrawTarget ? mDrawTarget->GetFormat()
      36           0 :                        : gfx::SurfaceFormat(gfx::SurfaceFormat::UNKNOWN);
      37             :   }
      38             : 
      39             :   RefPtr<gfx::DrawTarget> mDrawTarget;
      40             :   gfx::IntSize mSize;
      41             : };
      42             : 
      43             : class BasicCompositor : public Compositor
      44             : {
      45             : public:
      46             :   explicit BasicCompositor(CompositorBridgeParent* aParent, widget::CompositorWidget* aWidget);
      47             : 
      48             : protected:
      49             :   virtual ~BasicCompositor();
      50             : 
      51             : public:
      52             : 
      53           0 :   virtual BasicCompositor* AsBasicCompositor() override { return this; }
      54             : 
      55             :   virtual bool Initialize(nsCString* const out_failureReason) override;
      56             : 
      57             :   virtual void DetachWidget() override;
      58             : 
      59             :   virtual TextureFactoryIdentifier GetTextureFactoryIdentifier() override;
      60             : 
      61             :   virtual already_AddRefed<CompositingRenderTarget>
      62             :   CreateRenderTarget(const gfx::IntRect &aRect, SurfaceInitMode aInit) override;
      63             : 
      64             :   virtual already_AddRefed<CompositingRenderTarget>
      65             :   CreateRenderTargetFromSource(const gfx::IntRect &aRect,
      66             :                                const CompositingRenderTarget *aSource,
      67             :                                const gfx::IntPoint &aSourcePoint) override;
      68             : 
      69             :   virtual already_AddRefed<CompositingRenderTarget>
      70             :   CreateRenderTargetForWindow(const LayoutDeviceIntRect& aRect,
      71             :                               const LayoutDeviceIntRect& aClearRect,
      72             :                               BufferMode aBufferMode);
      73             : 
      74             :   virtual already_AddRefed<DataTextureSource>
      75             :   CreateDataTextureSource(TextureFlags aFlags = TextureFlags::NO_FLAGS) override;
      76             : 
      77             :   virtual already_AddRefed<DataTextureSource>
      78             :   CreateDataTextureSourceAround(gfx::DataSourceSurface* aSurface) override;
      79             : 
      80             :   virtual already_AddRefed<DataTextureSource>
      81             :   CreateDataTextureSourceAroundYCbCr(TextureHost* aTexture) override;
      82             : 
      83             :   virtual bool SupportsEffect(EffectTypes aEffect) override;
      84             : 
      85             :   bool SupportsLayerGeometry() const override;
      86             : 
      87          27 :   virtual void SetRenderTarget(CompositingRenderTarget *aSource) override
      88             :   {
      89          27 :     mRenderTarget = static_cast<BasicCompositingRenderTarget*>(aSource);
      90          27 :     mRenderTarget->BindRenderTarget();
      91          27 :   }
      92           0 :   virtual CompositingRenderTarget* GetCurrentRenderTarget() const override
      93             :   {
      94           0 :     return mRenderTarget;
      95             :   }
      96             : 
      97             :   virtual void DrawQuad(const gfx::Rect& aRect,
      98             :                         const gfx::IntRect& aClipRect,
      99             :                         const EffectChain &aEffectChain,
     100             :                         gfx::Float aOpacity,
     101             :                         const gfx::Matrix4x4& aTransform,
     102             :                         const gfx::Rect& aVisibleRect) override;
     103             : 
     104             :   virtual void ClearRect(const gfx::Rect& aRect) override;
     105             : 
     106             :   virtual void BeginFrame(const nsIntRegion& aInvalidRegion,
     107             :                           const gfx::IntRect *aClipRectIn,
     108             :                           const gfx::IntRect& aRenderBounds,
     109             :                           const nsIntRegion& aOpaqueRegion,
     110             :                           gfx::IntRect *aClipRectOut = nullptr,
     111             :                           gfx::IntRect *aRenderBoundsOut = nullptr) override;
     112             :   virtual void EndFrame() override;
     113             : 
     114           0 :   virtual bool SupportsPartialTextureUpdate() override { return true; }
     115           0 :   virtual bool CanUseCanvasLayerForSize(const gfx::IntSize &aSize) override { return true; }
     116             :   virtual int32_t GetMaxTextureSize() const override;
     117           0 :   virtual void SetDestinationSurfaceSize(const gfx::IntSize& aSize) override { }
     118             : 
     119           0 :   virtual void SetScreenRenderOffset(const ScreenPoint& aOffset) override {
     120           0 :   }
     121             : 
     122          56 :   virtual void MakeCurrent(MakeCurrentFlags aFlags = 0) override { }
     123             : 
     124             : #ifdef MOZ_DUMP_PAINTING
     125           0 :   virtual const char* Name() const override { return "Basic"; }
     126             : #endif // MOZ_DUMP_PAINTING
     127             : 
     128           0 :   virtual LayersBackend GetBackendType() const override {
     129           0 :     return LayersBackend::LAYERS_BASIC;
     130             :   }
     131             : 
     132             :   gfx::DrawTarget *GetDrawTarget() { return mDrawTarget; }
     133             : 
     134         151 :   virtual bool IsPendingComposite() override
     135             :   {
     136         151 :     return mIsPendingEndRemoteDrawing;
     137             :   }
     138             : 
     139             :   virtual void FinishPendingComposite() override;
     140             : 
     141             : private:
     142             : 
     143             :   template<typename Geometry>
     144             :   void DrawGeometry(const Geometry& aGeometry,
     145             :                     const gfx::Rect& aRect,
     146             :                     const gfx::IntRect& aClipRect,
     147             :                     const EffectChain& aEffectChain,
     148             :                     gfx::Float aOpacity,
     149             :                     const gfx::Matrix4x4& aTransform,
     150             :                     const gfx::Rect& aVisibleRect,
     151             :                     const bool aEnableAA);
     152             : 
     153             :   virtual void DrawPolygon(const gfx::Polygon& aPolygon,
     154             :                            const gfx::Rect& aRect,
     155             :                            const gfx::IntRect& aClipRect,
     156             :                            const EffectChain& aEffectChain,
     157             :                            gfx::Float aOpacity,
     158             :                            const gfx::Matrix4x4& aTransform,
     159             :                            const gfx::Rect& aVisibleRect) override;
     160             : 
     161             :   void TryToEndRemoteDrawing(bool aForceToEnd = false);
     162             : 
     163             :   bool NeedsToDeferEndRemoteDrawing();
     164             : 
     165             :   // The final destination surface
     166             :   RefPtr<gfx::DrawTarget> mDrawTarget;
     167             :   // The current render target for drawing
     168             :   RefPtr<BasicCompositingRenderTarget> mRenderTarget;
     169             : 
     170             :   LayoutDeviceIntRect mInvalidRect;
     171             :   LayoutDeviceIntRegion mInvalidRegion;
     172             : 
     173             :   uint32_t mMaxTextureSize;
     174             :   bool mIsPendingEndRemoteDrawing;
     175             : };
     176             : 
     177             : BasicCompositor* AssertBasicCompositor(Compositor* aCompositor);
     178             : 
     179             : } // namespace layers
     180             : } // namespace mozilla
     181             : 
     182             : #endif /* MOZILLA_GFX_BASICCOMPOSITOR_H */