Calculate and track display item opaqueness

third_party/WebKit/Source/platform/testing/PaintPrinters.cpp

 // 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.
 
 #include "platform/testing/PaintPrinters.h"
 
 #include "platform/graphics/paint/PaintChunk.h"
 #include "platform/graphics/paint/PaintChunkProperties.h"
 #include <iomanip> // NOLINT
 #include <ostream> // NOLINT
@@ skipping 31 matching lines @@
 }
 
 void PrintTo(const PaintChunk& chunk, std::ostream* os)
 {
     *os << "PaintChunk(begin=" << chunk.beginIndex
         << ", end=" << chunk.endIndex
         << ", props=";
     PrintTo(chunk.properties, os);
     *os << ", bounds=";
     PrintTo(chunk.bounds, os);
-    *os << ")";
+    *os << "), knownToBeOpaque=" << chunk.knownToBeOpaque;

[jbroman, 2016/01/27 01:47:14]

Please don't put this field outside of the parentheses. This looks weird:

  PaintChunk(begin=0, end=0, props=..., bounds=...), knownToBeOpaque=true

[pdr., 2016/01/27 05:07:46]

This was not intentional. Fixed.

 }
 
 void PrintTo(const PaintChunkProperties& properties, std::ostream* os)
 {
     *os << "PaintChunkProperties(";
     if (properties.transform) {
         *os << "transform=";
         PrintTo(*properties.transform, os);
     }
     *os << ")";
 }
 
 void PrintTo(const TransformPaintPropertyNode& transformPaintProperty, std::ostream* os)
 {
     *os << "TransformPaintPropertyNode(matrix=";
     PrintTo(transformPaintProperty.matrix(), os);
     *os << ", origin=";
     PrintTo(transformPaintProperty.origin(), os);
     *os << ")";
 }
 
 void PrintTo(const EffectPaintPropertyNode& effect, std::ostream* os)
 {
     *os << "EffectPaintPropertyNode(opacity=" << effect.opacity() << ")";
 }
 
 } // namespace blink