Use DrawingRecorder::canUseCachedDrawing

Source/core/paint/InlineFlowBoxPainter.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/InlineFlowBoxPainter.h"
 
 #include "core/paint/BoxPainter.h"
 #include "core/paint/RenderDrawingRecorder.h"
 #include "core/rendering/InlineFlowBox.h"
@@ skipping 43 matching lines @@
 
             if (containingBlockPaintsContinuationOutline) {
                 // Add ourselves to the containing block of the entire continuation so that it can
                 // paint us atomically.
                 cb->addContinuationWithOutline(toRenderInline(m_inlineFlowBox.renderer().node()->renderer()));
             } else if (!inlineFlow.isInlineElementContinuation()) {
                 paintInfo.outlineObjects()->add(&inlineFlow);
             }
         }
     } else if (paintInfo.phase == PaintPhaseMask) {
-        RenderDrawingRecorder recorder(paintInfo.context, &m_inlineFlowBox.renderer(), paintInfo.phase, pixelSnappedIntRect(overflowRect));
-        paintMask(paintInfo, paintOffset);
+        RenderDrawingRecorder recorder(paintInfo.context, m_inlineFlowBox.renderer(), paintInfo.phase, pixelSnappedIntRect(overflowRect));
+        if (!recorder.canUseCachedDrawing())
+            paintMask(paintInfo, paintOffset);
         return;
     } else if (paintInfo.phase == PaintPhaseForeground) {
         // Paint our background, border and box-shadow.
         paintBoxDecorationBackground(paintInfo, paintOffset);
     }
 
     // Paint our children.
     if (paintInfo.phase != PaintPhaseSelfOutline) {
         PaintInfo childInfo(paintInfo);
         childInfo.phase = paintInfo.phase == PaintPhaseChildOutlines ? PaintPhaseOutline : paintInfo.phase;
@@ skipping 129 matching lines @@
 
     LayoutRect frameRect = roundedFrameRectClampedToLineTopAndBottomIfNeeded();
 
     // Move x/y to our coordinates.
     LayoutRect localRect(frameRect);
     m_inlineFlowBox.flipForWritingMode(localRect);
     LayoutPoint adjustedPaintOffset = paintOffset + localRect.location();
 
     LayoutRect paintRect = LayoutRect(adjustedPaintOffset, frameRect.size());
 
-    RenderDrawingRecorder recorder(paintInfo.context, &m_inlineFlowBox.renderer(), paintInfo.phase, pixelSnappedIntRect(paintRect));
+    RenderDrawingRecorder recorder(paintInfo.context, m_inlineFlowBox.renderer(), paintInfo.phase, pixelSnappedIntRect(paintRect));
+    if (recorder.canUseCachedDrawing())
+        return;
 
     // Shadow comes first and is behind the background and border.
     if (!m_inlineFlowBox.boxModelObject()->boxShadowShouldBeAppliedToBackground(BackgroundBleedNone, &m_inlineFlowBox))
         paintBoxShadow(paintInfo, styleToUse, Normal, paintRect);
 
     Color backgroundColor = m_inlineFlowBox.renderer().resolveColor(styleToUse, CSSPropertyBackgroundColor);
     paintFillLayers(paintInfo, backgroundColor, styleToUse->backgroundLayers(), paintRect);
     paintBoxShadow(paintInfo, styleToUse, Inset, paintRect);
 
     // :first-line cannot be used to put borders on a line. Always paint borders with our
@@ skipping 101 matching lines @@
             rect.setHeight(logicalHeight);
         } else {
             rect.setX(logicalTop);
             rect.setWidth(logicalHeight);
         }
     }
     return rect;
 }
 
 } // namespace blink