Use DrawingRecorder::canUseCachedDrawing

Source/core/paint/TableCellPainter.cpp

 // Copyright 2014 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 "core/paint/TableCellPainter.h"
 
 #include "core/paint/BlockPainter.h"
 #include "core/paint/BoxPainter.h"
 #include "core/paint/RenderDrawingRecorder.h"
@@ skipping 113 matching lines @@
     LayoutRect paintRect = paintBounds(paintOffset, AddOffsetFromParent);
     if (paintRect.y() - m_renderTableCell.table()->outerBorderTop() >= paintInfo.rect.maxY())
         return;
 
     if (paintRect.maxY() + m_renderTableCell.table()->outerBorderBottom() <= paintInfo.rect.y())
         return;
 
     if (!m_renderTableCell.table()->currentBorderValue())
         return;
 
-    RenderDrawingRecorder recorder(paintInfo.context, &m_renderTableCell, paintInfo.phase, paintRect);
+    RenderDrawingRecorder recorder(paintInfo.context, m_renderTableCell, paintInfo.phase, paintRect);
+    if (recorder.canUseCachedDrawing())
+        return;
 
     const RenderStyle* styleForCellFlow = m_renderTableCell.styleForCellFlow();
     CollapsedBorderValue leftVal = cachedCollapsedLeftBorder(styleForCellFlow);
     CollapsedBorderValue rightVal = cachedCollapsedRightBorder(styleForCellFlow);
     CollapsedBorderValue topVal = cachedCollapsedTopBorder(styleForCellFlow);
     CollapsedBorderValue bottomVal = cachedCollapsedBottomBorder(styleForCellFlow);
 
     // Adjust our x/y/width/height so that we paint the collapsed borders at the correct location.
     int topWidth = topVal.width();
     int bottomWidth = bottomVal.width();
@@ skipping 71 matching lines @@
 void TableCellPainter::paintBoxDecorationBackground(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     if (!paintInfo.shouldPaintWithinRoot(&m_renderTableCell))
         return;
 
     RenderTable* tableElt = m_renderTableCell.table();
     if (!tableElt->collapseBorders() && m_renderTableCell.style()->emptyCells() == HIDE && !m_renderTableCell.firstChild())
         return;
 
     LayoutRect paintRect = paintBounds(paintOffset, DoNotAddOffsetFromParent);
-    RenderDrawingRecorder recorder(paintInfo.context, &m_renderTableCell, paintInfo.phase, pixelSnappedIntRect(paintRect));
+    RenderDrawingRecorder recorder(paintInfo.context, m_renderTableCell, paintInfo.phase, pixelSnappedIntRect(paintRect));
+    if (recorder.canUseCachedDrawing())
+        return;
+
     BoxPainter::paintBoxShadow(paintInfo, paintRect, m_renderTableCell.style(), Normal);
 
     // Paint our cell background.
     paintBackgroundsBehindCell(paintInfo, paintOffset, &m_renderTableCell);
 
     BoxPainter::paintBoxShadow(paintInfo, paintRect, m_renderTableCell.style(), Inset);
 
     if (!m_renderTableCell.style()->hasBorder() || tableElt->collapseBorders())
         return;
 
@@ skipping 15 matching lines @@
 LayoutRect TableCellPainter::paintBounds(const LayoutPoint& paintOffset, PaintBoundOffsetBehavior paintBoundOffsetBehavior)
 {
     LayoutPoint adjustedPaintOffset = paintOffset;
     if (paintBoundOffsetBehavior == AddOffsetFromParent)
         adjustedPaintOffset.moveBy(m_renderTableCell.location());
     return LayoutRect(adjustedPaintOffset, LayoutSize(m_renderTableCell.pixelSnappedSize()));
 }
 
 } // namespace blink