The Tor Browser: gfx/skia/trunk/src/core/SkPictureStateTree.h@129ffea94266 (annotated)

gfx/skia/trunk/src/core/SkPictureStateTree.h@129ffea94266 (annotated)

gfx/skia/trunk/src/core/SkPictureStateTree.h

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkPictureStateTree_DEFINED
 #define SkPictureStateTree_DEFINED
 #include "SkTDArray.h"
 #include "SkChunkAlloc.h"
 #include "SkDeque.h"
 #include "SkMatrix.h"
 #include "SkRefCnt.h"
 class SkCanvas;
 /**
  * Provides an interface that, given a sequence of draws into an SkPicture with corresponding
  * offsets, allows for playback of an arbitrary subset of the draws (note that Z-order is only
  * guaranteed if the draws are explicitly sorted).
  */
 class SkPictureStateTree : public SkRefCnt {
 private:
     struct Node;
 public:
     SK_DECLARE_INST_COUNT(SkPictureStateTree)
     /**
      * A draw call, stores offset into command buffer, a pointer to the matrix, and a pointer to
      * the node in the tree that corresponds to its clip/layer state
      */
     struct Draw {
         SkMatrix* fMatrix;
         Node* fNode;
         uint32_t fOffset;
         bool operator<(const Draw& other) const { return fOffset < other.fOffset; }
     };
     class Iterator;
     SkPictureStateTree();
     ~SkPictureStateTree();
     /**
      * Creates and returns a struct representing a draw at the given offset.
      */
     Draw* appendDraw(size_t offset);
     /**
      * Given a list of draws, and a canvas, returns an iterator that produces the correct sequence
      * of offsets into the command buffer to carry out those calls with correct matrix/clip state.
      * This handles saves/restores, and does all necessary matrix setup.
      */
     Iterator getIterator(const SkTDArray<void*>& draws, SkCanvas* canvas);
     void appendSave();
     void appendSaveLayer(size_t offset);
     void appendRestore();
     void appendTransform(const SkMatrix& trans);
     void appendClip(size_t offset);
     /**
      * Call this immediately after an appendRestore call that is associated
      * a save or saveLayer that was removed from the command stream
      * due to a command pattern optimization in SkPicture.
      */
     void saveCollapsed();
     /**
      * Playback helper
      */
     class Iterator {
     public:
         /** Returns the next offset into the picture stream, or kDrawComplete if complete. */
         uint32_t draw();
         static const uint32_t kDrawComplete = SK_MaxU32;
         Iterator() : fPlaybackMatrix(), fValid(false) { }
         bool isValid() const { return fValid; }
     private:
         Iterator(const SkTDArray<void*>& draws, SkCanvas* canvas, Node* root);
         // The draws this iterator is associated with
         const SkTDArray<void*>* fDraws;
         // canvas this is playing into (so we can insert saves/restores as necessary)
         SkCanvas* fCanvas;
         // current state node
         Node* fCurrentNode;
         // List of nodes whose state we need to apply to reach TargetNode
         SkTDArray<Node*> fNodes;
         // The matrix of the canvas we're playing back into
         const SkMatrix fPlaybackMatrix;
         // Cache of current matrix, so we can avoid redundantly setting it
         SkMatrix* fCurrentMatrix;
         // current position in the array of draws
         int fPlaybackIndex;
         // Whether or not we need to do a save next iteration
         bool fSave;
         // Whether or not this is a valid iterator (the default public constructor sets this false)
         bool fValid;
         friend class SkPictureStateTree;
     };
 private:
     void appendNode(size_t offset);
     SkChunkAlloc fAlloc;
     // Needed by saveCollapsed() because nodes do not currently store
     // references to their children.  If they did, we could just retrieve the
     // last added child.
     Node* fLastRestoredNode;
     // The currently active state
     Draw fCurrentState;
     // A stack of states for tracking save/restores
     SkDeque fStateStack;
     // Represents a notable piece of state that requires an offset into the command buffer,
     // corresponding to a clip/saveLayer/etc call, to apply.
     struct Node {
         Node* fParent;
         uint32_t fOffset;
         uint16_t fLevel;
         uint16_t fFlags;
         SkMatrix* fMatrix;
         enum Flags {
             kSave_Flag      = 0x1,
             kSaveLayer_Flag = 0x2
         };
     };
     Node fRoot;
     SkMatrix fRootMatrix;
     typedef SkRefCnt INHERITED;
 };
 #endif

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gfx/skia/trunk/src/core/SkPictureStateTree.h@129ffea94266 (annotated)

gfx/skia/trunk/src/core/SkPictureStateTree.h