SPv2: Paint SVG images and self-contained recorded pictures with their own trees.

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/graphics/CompositingReasons.h"
 #include "platform/graphics/CompositorElementId.h"
 #include "platform/transforms/TransformationMatrix.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 #include "wtf/text/WTFString.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.
 //
 // The transform tree is rooted at a node with no parent. This root node should
 // not be modified.
 class PLATFORM_EXPORT TransformPaintPropertyNode
     : public RefCounted<TransformPaintPropertyNode> {
  public:
+  // This node is really a sentinel, and does not represent a real transform

[pdr., 2017/01/17 21:48:00]

I'll be removing these soon.

[chrishtr, 2017/01/17 22:20:27]

ACK!!!!!!!!!!!

+  // space.
   static TransformPaintPropertyNode* root();
 
   static PassRefPtr<TransformPaintPropertyNode> create(
       PassRefPtr<const TransformPaintPropertyNode> parent,
       const TransformationMatrix& matrix,
       const FloatPoint3D& origin,
       bool flattensInheritedTransform = false,
       unsigned renderingContextId = 0,
       CompositingReasons directCompositingReasons = CompositingReasonNone,
       const CompositorElementId& compositorElementId = CompositorElementId()) {
@@ skipping 99 matching lines @@
   CompositorElementId m_compositorElementId;
 };
 
 // Redeclared here to avoid ODR issues.
 // See platform/testing/PaintPrinters.h.
 void PrintTo(const TransformPaintPropertyNode&, std::ostream*);
 
 }  // namespace blink
 
 #endif  // TransformPaintPropertyNode_h