(WIP) Paint property hierarchy approach 1 of 2

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 "config.h"
 #include "platform/testing/PaintPrinters.h"
 
 #include "platform/graphics/paint/PaintChunk.h"
 #include "platform/graphics/paint/PaintProperties.h"
+#include "platform/graphics/paint/TransformPaintProperty.h"
+
 #include <ostream> // NOLINT
 
 namespace blink {
 
 void PrintTo(const PaintChunk& chunk, std::ostream* os)
 {
     *os << "PaintChunk(begin=" << chunk.beginIndex
         << ", end=" << chunk.endIndex
         << ", props=";
     PrintTo(chunk.properties, os);
     *os << ")";
 }
 
 void PrintTo(const PaintProperties& properties, std::ostream* os)
 {
-    *os << "PaintProperties()";
+    *os << "PaintProperties(transformIndex=" << properties.transformIndex << ")";
+}
+
+// TODO(pdr): Create and move this to TransformPrinters.cpp.
+static void PrintTo(const TransformationMatrix& matrix, std::ostream* os)
+{
+    TransformationMatrix::DecomposedType decomposition;
+    if (!matrix.decompose(decomposition)) {
+        *os << "TransformationMatrix(degenerate)";
+        return;
+    }
+
+    if (matrix.isIdentityOrTranslation()) {
+        *os << "TransformationMatrix(translation=(" << decomposition.translateX << "," << decomposition.translateY << "," << decomposition.translateZ << "))";
+        return;
+    }
+
+    *os << "TransformationMatrix("
+        << "translation=(" << decomposition.translateX << "," << decomposition.translateY << "," << decomposition.translateZ << ")"
+        << ", scale=(" << decomposition.scaleX << "," << decomposition.scaleY << "," << decomposition.scaleZ << ")"
+        << ", skew=(" << decomposition.skewXY << "," << decomposition.skewXZ << "," << decomposition.skewYZ << ")"
+        << ", quaternion=(" << decomposition.quaternionX << "," << decomposition.quaternionY << "," << decomposition.quaternionZ << "," << decomposition.quaternionW << ")"
+        << ", perspective=(" << decomposition.perspectiveX << "," << decomposition.perspectiveY << "," << decomposition.perspectiveZ << "," << decomposition.perspectiveW << ")"
+        << ")";
+}
+
+void PrintTo(const TransformPaintProperty& transformPaintProperty, std::ostream* os)
+{
+    *os << "TransformPaintProperty(matrix=";
+    PrintTo(transformPaintProperty.matrix(), os);
+    *os << ", origin=";
+    PrintTo(transformPaintProperty.origin(), os);
+    *os << ")";
 }
 
 } // namespace blink