[SPv2] Rasterization invalidation

third_party/WebKit/Source/platform/graphics/paint/PaintChunk.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 PaintChunk_h
 #define PaintChunk_h
 
 #include "platform/geometry/FloatRect.h"
 #include "platform/graphics/paint/DisplayItem.h"
 #include "platform/graphics/paint/PaintChunkProperties.h"
@@ skipping 55 matching lines @@
     // contents, so the id should be stable across document cycles.
     // If the contents of the chunk can't be cached (e.g. it's created when PaintController
     // is skipping cache, normally because display items can't be uniquely identified),
     // id is nullopt so that the chunk won't match any other chunk.
     using Id = DisplayItem::Id;
     Optional<Id> id;
 
     // The paint properties which apply to this chunk.
     PaintChunkProperties properties;
 
-    // The total bounds of this paint chunk's contents.
+    // The total bounds of this paint chunk's contents, in coordinate space of

[chrishtr, 2016/08/26 18:10:51]

nit: "in the coordinate space..."

Also, no need to reference SPv1 since PaintChunks don't exist there, right?

[Xianzhu, 2016/08/26 18:39:23]

Done.

+    // the containing GraphicsLayer (SPv1) or the containing transformation node (SPv2).
     FloatRect bounds;
 
     // True if the bounds are filled entirely with opaque contents.
     bool knownToBeOpaque;
+
+    // SPv2 only. Rectangles that need to be rerasterized in this chunk, in coordinate

[chrishtr, 2016/08/26 18:10:51]

nit: "re-rasterized"  "in the coordinate space..."

[Xianzhu, 2016/08/26 18:39:23]

Done.

+    // space of the containing transformation node.
+    Vector<FloatRect> rasterInvalidationRects;
 };
 
 inline bool operator==(const PaintChunk& a, const PaintChunk& b)
 {
     return a.beginIndex == b.beginIndex
         && a.endIndex == b.endIndex
         && a.id == b.id
         && a.properties == b.properties
         && a.bounds == b.bounds
-        && a.knownToBeOpaque == b.knownToBeOpaque;
+        && a.knownToBeOpaque == b.knownToBeOpaque
+        && a.rasterInvalidationRects == b.rasterInvalidationRects;
 }
 
 inline bool operator!=(const PaintChunk& a, const PaintChunk& b)
 {
     return !(a == b);
 }
 
 // Redeclared here to avoid ODR issues.
 // See platform/testing/PaintPrinters.h.
 void PrintTo(const PaintChunk&, std::ostream*);
 
 } // namespace blink
 
 #endif // PaintChunk_h