Preliminary paint property walk implementation for SPv2

third_party/WebKit/Source/platform/graphics/paint/TransformPaintPropertyNode.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TransformPaintPropertyNode_h
 #define TransformPaintPropertyNode_h
 
 #include "platform/PlatformExport.h"
 #include "platform/geometry/FloatPoint3D.h"
 #include "platform/transforms/TransformationMatrix.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
 #include <iosfwd>
 
 namespace blink {
 
 // A transform created by a css property such as "transform" or "perspective"
 // along with a reference to the parent TransformPaintPropertyNode, or nullptr
 // for the root.
 class PLATFORM_EXPORT TransformPaintPropertyNode : public RefCounted<TransformPaintPropertyNode> {
 public:
-    TransformPaintPropertyNode(const TransformationMatrix& matrix, const FloatPoint3D& origin, PassRefPtr<TransformPaintPropertyNode> parent = nullptr)
-        : m_matrix(matrix), m_origin(origin), m_parent(parent) { }
+    static PassRefPtr<TransformPaintPropertyNode> create(const TransformationMatrix& matrix, const FloatPoint3D& origin, PassRefPtr<TransformPaintPropertyNode> parent = nullptr) { return adoptRef(new TransformPaintPropertyNode(matrix, origin, parent)); }

[pdr., 2015/10/20 22:02:31]

You'll need to update PaintChunkerTest and PaintArtifactToSkCanvasTest to use
::create too. It's a trivial change since they already call adoptRef you can
just update them to use TransformPaintPropertyNode::create(...).

[trchen, 2015/10/21 06:16:20]

Done.

+
 
     const TransformationMatrix& matrix() const { return m_matrix; }
     const FloatPoint3D& origin() const { return m_origin; }
 
     // Parent transform that this transform is relative to, or nullptr if this
     // is the root transform.
     const TransformPaintPropertyNode* parent() const { return m_parent.get(); }
 
 private:
+    TransformPaintPropertyNode(const TransformationMatrix& matrix, const FloatPoint3D& origin, PassRefPtr<TransformPaintPropertyNode> parent)
+        : m_matrix(matrix), m_origin(origin), m_parent(parent) { }
+
     const TransformationMatrix m_matrix;
     const FloatPoint3D m_origin;
     RefPtr<TransformPaintPropertyNode> m_parent;
 };
 
 // Redeclared here to avoid ODR issues.
 // See platform/testing/PaintPrinters.h.
 void PrintTo(const TransformPaintPropertyNode&, std::ostream*);
 
 } // namespace blink
 
 #endif // TransformPaintPropertyNode_h