The Tor Browser: gfx/2d/DrawTargetD2D.h@97036ab72558 (annotated)

gfx/2d/DrawTargetD2D.h@97036ab72558 (annotated)

gfx/2d/DrawTargetD2D.h

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #ifndef MOZILLA_GFX_DRAWTARGETD2D_H_
 #define MOZILLA_GFX_DRAWTARGETD2D_H_
 #include "2D.h"
 #include "PathD2D.h"
 #include <d3d10_1.h>
 #include "HelpersD2D.h"
 #include <vector>
 #include <sstream>
 #ifdef _MSC_VER
 #include <hash_set>
 #else
 #include <unordered_set>
 #endif
 struct IDWriteFactory;
 namespace mozilla {
 namespace gfx {
 class SourceSurfaceD2DTarget;
 class SourceSurfaceD2D;
 class GradientStopsD2D;
 class ScaledFontDWrite;
 const int32_t kLayerCacheSize = 5;
 struct PrivateD3D10DataD2D
 {
   RefPtr<ID3D10Effect> mEffect;
   RefPtr<ID3D10InputLayout> mInputLayout;
   RefPtr<ID3D10Buffer> mVB;
   RefPtr<ID3D10BlendState> mBlendStates[size_t(CompositionOp::OP_COUNT)];
 };
 class DrawTargetD2D : public DrawTarget
 {
 public:
   MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetD2D)
   DrawTargetD2D();
   virtual ~DrawTargetD2D();
   virtual BackendType GetType() const { return BackendType::DIRECT2D; }
   virtual TemporaryRef<SourceSurface> Snapshot();
   virtual IntSize GetSize() { return mSize; }
   virtual void Flush();
   virtual void DrawSurface(SourceSurface *aSurface,
                            const Rect &aDest,
                            const Rect &aSource,
                            const DrawSurfaceOptions &aSurfOptions = DrawSurfaceOptions(),
                            const DrawOptions &aOptions = DrawOptions());
   virtual void DrawFilter(FilterNode *aNode,
                           const Rect &aSourceRect,
                           const Point &aDestPoint,
                           const DrawOptions &aOptions = DrawOptions());
   virtual void DrawSurfaceWithShadow(SourceSurface *aSurface,
                                      const Point &aDest,
                                      const Color &aColor,
                                      const Point &aOffset,
                                      Float aSigma,
                                      CompositionOp aOperator);
   virtual void ClearRect(const Rect &aRect);
   virtual void MaskSurface(const Pattern &aSource,
                            SourceSurface *aMask,
                            Point aOffset,
                            const DrawOptions &aOptions = DrawOptions());
   virtual void CopySurface(SourceSurface *aSurface,
                            const IntRect &aSourceRect,
                            const IntPoint &aDestination);
   virtual void FillRect(const Rect &aRect,
                         const Pattern &aPattern,
                         const DrawOptions &aOptions = DrawOptions());
   virtual void StrokeRect(const Rect &aRect,
                           const Pattern &aPattern,
                           const StrokeOptions &aStrokeOptions = StrokeOptions(),
                           const DrawOptions &aOptions = DrawOptions());
   virtual void StrokeLine(const Point &aStart,
                           const Point &aEnd,
                           const Pattern &aPattern,
                           const StrokeOptions &aStrokeOptions = StrokeOptions(),
                           const DrawOptions &aOptions = DrawOptions());
   virtual void Stroke(const Path *aPath,
                       const Pattern &aPattern,
                       const StrokeOptions &aStrokeOptions = StrokeOptions(),
                       const DrawOptions &aOptions = DrawOptions());
   virtual void Fill(const Path *aPath,
                     const Pattern &aPattern,
                     const DrawOptions &aOptions = DrawOptions());
   virtual void FillGlyphs(ScaledFont *aFont,
                           const GlyphBuffer &aBuffer,
                           const Pattern &aPattern,
                           const DrawOptions &aOptions = DrawOptions(),
                           const GlyphRenderingOptions *aRenderingOptions = nullptr);
   virtual void Mask(const Pattern &aSource,
                     const Pattern &aMask,
                     const DrawOptions &aOptions = DrawOptions());
   virtual void PushClip(const Path *aPath);
   virtual void PushClipRect(const Rect &aRect);
   virtual void PopClip();
   virtual TemporaryRef<SourceSurface> CreateSourceSurfaceFromData(unsigned char *aData,
                                                             const IntSize &aSize,
                                                             int32_t aStride,
                                                             SurfaceFormat aFormat) const;
   virtual TemporaryRef<SourceSurface> OptimizeSourceSurface(SourceSurface *aSurface) const;
   virtual TemporaryRef<SourceSurface>
     CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const;
   virtual TemporaryRef<DrawTarget>
     CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const;
   virtual TemporaryRef<PathBuilder> CreatePathBuilder(FillRule aFillRule = FillRule::FILL_WINDING) const;
   virtual TemporaryRef<GradientStops>
     CreateGradientStops(GradientStop *aStops,
                         uint32_t aNumStops,
                         ExtendMode aExtendMode = ExtendMode::CLAMP) const;
   virtual TemporaryRef<FilterNode> CreateFilter(FilterType aType);
   virtual void *GetNativeSurface(NativeSurfaceType aType);
   bool Init(const IntSize &aSize, SurfaceFormat aFormat);
   bool Init(ID3D10Texture2D *aTexture, SurfaceFormat aFormat);
   bool InitD3D10Data();
   uint32_t GetByteSize() const;
   TemporaryRef<ID2D1Layer> GetCachedLayer();
   void PopCachedLayer(ID2D1RenderTarget *aRT);
 #ifdef USE_D2D1_1
   TemporaryRef<ID2D1Image> GetImageForSurface(SourceSurface *aSurface);
 #endif
   static ID2D1Factory *factory();
   static void CleanupD2D();
   static IDWriteFactory *GetDWriteFactory();
   ID2D1RenderTarget *GetRT() { return mRT; }
   operator std::string() const {
     std::stringstream stream;
     stream << "DrawTargetD2D(" << this << ")";
     return stream.str();
   }
   static uint64_t mVRAMUsageDT;
   static uint64_t mVRAMUsageSS;
 private:
   TemporaryRef<ID2D1Bitmap>
   GetBitmapForSurface(SourceSurface *aSurface,
                       Rect &aSource);
   friend class AutoSaveRestoreClippedOut;
   friend class SourceSurfaceD2DTarget;
 #ifdef _MSC_VER
   typedef stdext::hash_set<DrawTargetD2D*> TargetSet;
 #else
   typedef std::unordered_set<DrawTargetD2D*> TargetSet;
 #endif
   bool InitD2DRenderTarget();
   void PrepareForDrawing(ID2D1RenderTarget *aRT);
   // This function will mark the surface as changing, and make sure any
   // copy-on-write snapshots are notified.
   void MarkChanged();
   void FlushTransformToRT() {
     if (mTransformDirty) {
       mRT->SetTransform(D2DMatrix(mTransform));
       mTransformDirty = false;
     }
   }
   void AddDependencyOnSource(SourceSurfaceD2DTarget* aSource);
   ID3D10BlendState *GetBlendStateForOperator(CompositionOp aOperator);
   ID2D1RenderTarget *GetRTForOperation(CompositionOp aOperator, const Pattern &aPattern);
   void FinalizeRTForOperation(CompositionOp aOperator, const Pattern &aPattern, const Rect &aBounds);  void EnsureViews();
   void PopAllClips();
   void PushClipsToRT(ID2D1RenderTarget *aRT);
   void PopClipsFromRT(ID2D1RenderTarget *aRT);
   // This function ensures mCurrentClipMaskTexture contains a texture containing
   // a mask corresponding with the current DrawTarget clip. See
   // GetClippedGeometry for a description of aClipBounds.
   void EnsureClipMaskTexture(IntRect *aClipBounds);
   bool FillGlyphsManual(ScaledFontDWrite *aFont,
                         const GlyphBuffer &aBuffer,
                         const Color &aColor,
                         IDWriteRenderingParams *aParams,
                         const DrawOptions &aOptions = DrawOptions());
   TemporaryRef<ID2D1RenderTarget> CreateRTForTexture(ID3D10Texture2D *aTexture, SurfaceFormat aFormat);
   // This returns the clipped geometry, in addition it returns aClipBounds which
   // represents the intersection of all pixel-aligned rectangular clips that
   // are currently set. The returned clipped geometry must be clipped by these
   // bounds to correctly reflect the total clip. This is in device space.
   TemporaryRef<ID2D1Geometry> GetClippedGeometry(IntRect *aClipBounds);
   bool GetDeviceSpaceClipRect(D2D1_RECT_F& aClipRect, bool& aIsPixelAligned);
   TemporaryRef<ID2D1Brush> CreateBrushForPattern(const Pattern &aPattern, Float aAlpha = 1.0f);
   TemporaryRef<ID3D10Texture2D> CreateGradientTexture(const GradientStopsD2D *aStops);
   TemporaryRef<ID3D10Texture2D> CreateTextureForAnalysis(IDWriteGlyphRunAnalysis *aAnalysis, const IntRect &aBounds);
   void SetupEffectForRadialGradient(const RadialGradientPattern *aPattern);
   void SetupStateForRendering();
   // Set the scissor rect to a certain IntRects, resets the scissor rect to
   // surface bounds when nullptr is specified.
   void SetScissorToRect(IntRect *aRect);
   void PushD2DLayer(ID2D1RenderTarget *aRT, ID2D1Geometry *aGeometry, ID2D1Layer *aLayer, const D2D1_MATRIX_3X2_F &aTransform);
   static const uint32_t test = 4;
   IntSize mSize;
   RefPtr<ID3D10Device1> mDevice;
   RefPtr<ID3D10Texture2D> mTexture;
   RefPtr<ID3D10Texture2D> mCurrentClipMaskTexture;
   RefPtr<ID2D1Geometry> mCurrentClippedGeometry;
   // This is only valid if mCurrentClippedGeometry is non-null. And will
   // only be the intersection of all pixel-aligned retangular clips. This is in
   // device space.
   IntRect mCurrentClipBounds;
   mutable RefPtr<ID2D1RenderTarget> mRT;
   // We store this to prevent excessive SetTextRenderingParams calls.
   RefPtr<IDWriteRenderingParams> mTextRenderingParams;
   // Temporary texture and render target used for supporting alternative operators.
   RefPtr<ID3D10Texture2D> mTempTexture;
   RefPtr<ID3D10RenderTargetView> mRTView;
   RefPtr<ID3D10ShaderResourceView> mSRView;
   RefPtr<ID2D1RenderTarget> mTempRT;
   RefPtr<ID3D10RenderTargetView> mTempRTView;
   // List of pushed clips.
   struct PushedClip
   {
     RefPtr<ID2D1Layer> mLayer;
     D2D1_RECT_F mBounds;
     union {
       // If mPath is non-nullptr, the mTransform member will be used, otherwise
       // the mIsPixelAligned member is valid.
       D2D1_MATRIX_3X2_F mTransform;
       bool mIsPixelAligned;
     };
     RefPtr<PathD2D> mPath;
   };
   std::vector<PushedClip> mPushedClips;
   // We cache ID2D1Layer objects as it causes D2D to keep around textures that
   // serve as the temporary surfaces for these operations. As texture creation
   // is quite expensive this considerably improved performance.
   // Careful here, RAII will not ensure destruction of the RefPtrs.
   RefPtr<ID2D1Layer> mCachedLayers[kLayerCacheSize];
   uint32_t mCurrentCachedLayer;
   // The latest snapshot of this surface. This needs to be told when this
   // target is modified. We keep it alive as a cache.
   RefPtr<SourceSurfaceD2DTarget> mSnapshot;
   // A list of targets we need to flush when we're modified.
   TargetSet mDependentTargets;
   // A list of targets which have this object in their mDependentTargets set
   TargetSet mDependingOnTargets;
   // True of the current clip stack is pushed to the main RT.
   bool mClipsArePushed;
   PrivateD3D10DataD2D *mPrivateData;
   static ID2D1Factory *mFactory;
   static IDWriteFactory *mDWriteFactory;
 };
 }
 }
 #endif /* MOZILLA_GFX_DRAWTARGETD2D_H_ */

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gfx/2d/DrawTargetD2D.h@97036ab72558 (annotated)

gfx/2d/DrawTargetD2D.h