Move a bunch more painting code out of RenderBoxModelObject and into BoxPainter.

Source/core/rendering/RenderBoxModelObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 293 matching lines @@
 }
 
 LayoutUnit RenderBoxModelObject::computedCSSPadding(const Length& padding) const
 {
     LayoutUnit w = 0;
     if (padding.isPercent())
         w = containingBlockLogicalWidthForContent();
     return minimumValueForLength(padding, w);
 }
 
-// FIXME: See crbug.com/382491. The use of getCTM in this context is incorrect because the matrix returned does not
-// include scales applied at raster time, such as the device zoom.
-static LayoutRect shrinkRectByOnePixel(GraphicsContext* context, const LayoutRect& rect)
-{
-    LayoutRect shrunkRect = rect;
-    AffineTransform transform = context->getCTM();
-    shrunkRect.inflateX(-static_cast<LayoutUnit>(ceil(1 / transform.xScale())));
-    shrunkRect.inflateY(-static_cast<LayoutUnit>(ceil(1 / transform.yScale())));
-    return shrunkRect;
-}
-
-LayoutRect RenderBoxModelObject::borderInnerRectAdjustedForBleedAvoidance(GraphicsContext* context, const LayoutRect& rect, BackgroundBleedAvoidance bleedAvoidance) const
-{
-    // We shrink the rectangle by one pixel on each side to make it fully overlap the anti-aliased background border
-    return (bleedAvoidance == BackgroundBleedBackgroundOverBorder) ? shrinkRectByOnePixel(context, rect) : rect;
-}
-
 static inline int resolveWidthForRatio(int height, const FloatSize& intrinsicRatio)
 {
     return ceilf(height * intrinsicRatio.width() / intrinsicRatio.height());
 }
 
 static inline int resolveHeightForRatio(int width, const FloatSize& intrinsicRatio)
 {
     return ceilf(width * intrinsicRatio.height() / intrinsicRatio.width());
 }
 
@@ skipping 70 matching lines @@
     // largest dimensions at that ratio such that neither dimension exceeds the dimensions of the rectangle that
     // establishes the coordinate system for the 'background-position' property.
     if (!intrinsicRatio.isEmpty())
         return resolveAgainstIntrinsicRatio(positioningAreaSize, intrinsicRatio);
 
     // If the image has no intrinsic ratio either, then the dimensions must be assumed to be the rectangle that
     // establishes the coordinate system for the 'background-position' property.
     return positioningAreaSize;
 }
 
-static LayoutUnit computeBorderImageSide(const BorderImageLength& borderSlice, LayoutUnit borderSide, LayoutUnit imageSide, LayoutUnit boxExtent)
-{
-    if (borderSlice.isNumber())
-        return borderSlice.number() * borderSide;
-    if (borderSlice.length().isAuto())
-        return imageSide;
-    return valueForLength(borderSlice.length(), boxExtent);
-}
-
-bool RenderBoxModelObject::paintNinePieceImage(GraphicsContext* graphicsContext, const LayoutRect& rect, const RenderStyle* style,
-                                               const NinePieceImage& ninePieceImage, CompositeOperator op)
-{
-    StyleImage* styleImage = ninePieceImage.image();
-    if (!styleImage)
-        return false;
-
-    if (!styleImage->isLoaded())
-        return true; // Never paint a nine-piece image incrementally, but don't paint the fallback borders either.
-
-    if (!styleImage->canRender(*this, style->effectiveZoom()))
-        return false;
-
-    // FIXME: border-image is broken with full page zooming when tiling has to happen, since the tiling function
-    // doesn't have any understanding of the zoom that is in effect on the tile.
-    LayoutRect rectWithOutsets = rect;
-    rectWithOutsets.expand(style->imageOutsets(ninePieceImage));
-    IntRect borderImageRect = pixelSnappedIntRect(rectWithOutsets);
-
-    IntSize imageSize = calculateImageIntrinsicDimensions(styleImage, borderImageRect.size(), DoNotScaleByEffectiveZoom);
-
-    // If both values are ‘auto’ then the intrinsic width and/or height of the image should be used, if any.
-    styleImage->setContainerSizeForRenderer(this, imageSize, style->effectiveZoom());
-
-    int imageWidth = imageSize.width();
-    int imageHeight = imageSize.height();
-
-    float imageScaleFactor = styleImage->imageScaleFactor();
-    int topSlice = std::min<int>(imageHeight, valueForLength(ninePieceImage.imageSlices().top(), imageHeight)) * imageScaleFactor;
-    int rightSlice = std::min<int>(imageWidth, valueForLength(ninePieceImage.imageSlices().right(), imageWidth)) * imageScaleFactor;
-    int bottomSlice = std::min<int>(imageHeight, valueForLength(ninePieceImage.imageSlices().bottom(), imageHeight)) * imageScaleFactor;
-    int leftSlice = std::min<int>(imageWidth, valueForLength(ninePieceImage.imageSlices().left(), imageWidth)) * imageScaleFactor;
-
-    ENinePieceImageRule hRule = ninePieceImage.horizontalRule();
-    ENinePieceImageRule vRule = ninePieceImage.verticalRule();
-
-    int topWidth = computeBorderImageSide(ninePieceImage.borderSlices().top(), style->borderTopWidth(), topSlice, borderImageRect.height());
-    int rightWidth = computeBorderImageSide(ninePieceImage.borderSlices().right(), style->borderRightWidth(), rightSlice, borderImageRect.width());
-    int bottomWidth = computeBorderImageSide(ninePieceImage.borderSlices().bottom(), style->borderBottomWidth(), bottomSlice, borderImageRect.height());
-    int leftWidth = computeBorderImageSide(ninePieceImage.borderSlices().left(), style->borderLeftWidth(), leftSlice, borderImageRect.width());
-
-    // Reduce the widths if they're too large.
-    // The spec says: Given Lwidth as the width of the border image area, Lheight as its height, and Wside as the border image width
-    // offset for the side, let f = min(Lwidth/(Wleft+Wright), Lheight/(Wtop+Wbottom)). If f < 1, then all W are reduced by
-    // multiplying them by f.
-    int borderSideWidth = std::max(1, leftWidth + rightWidth);
-    int borderSideHeight = std::max(1, topWidth + bottomWidth);
-    float borderSideScaleFactor = std::min((float)borderImageRect.width() / borderSideWidth, (float)borderImageRect.height() / borderSideHeight);
-    if (borderSideScaleFactor < 1) {
-        topWidth *= borderSideScaleFactor;
-        rightWidth *= borderSideScaleFactor;
-        bottomWidth *= borderSideScaleFactor;
-        leftWidth *= borderSideScaleFactor;
-    }
-
-    bool drawLeft = leftSlice > 0 && leftWidth > 0;
-    bool drawTop = topSlice > 0 && topWidth > 0;
-    bool drawRight = rightSlice > 0 && rightWidth > 0;
-    bool drawBottom = bottomSlice > 0 && bottomWidth > 0;
-    bool drawMiddle = ninePieceImage.fill() && (imageWidth - leftSlice - rightSlice) > 0 && (borderImageRect.width() - leftWidth - rightWidth) > 0
-                      && (imageHeight - topSlice - bottomSlice) > 0 && (borderImageRect.height() - topWidth - bottomWidth) > 0;
-
-    RefPtr<Image> image = styleImage->image(this, imageSize);
-
-    float destinationWidth = borderImageRect.width() - leftWidth - rightWidth;
-    float destinationHeight = borderImageRect.height() - topWidth - bottomWidth;
-
-    float sourceWidth = imageWidth - leftSlice - rightSlice;
-    float sourceHeight = imageHeight - topSlice - bottomSlice;
-
-    float leftSideScale = drawLeft ? (float)leftWidth / leftSlice : 1;
-    float rightSideScale = drawRight ? (float)rightWidth / rightSlice : 1;
-    float topSideScale = drawTop ? (float)topWidth / topSlice : 1;
-    float bottomSideScale = drawBottom ? (float)bottomWidth / bottomSlice : 1;
-
-    if (drawLeft) {
-        // Paint the top and bottom left corners.
-
-        // The top left corner rect is (tx, ty, leftWidth, topWidth)
-        // The rect to use from within the image is obtained from our slice, and is (0, 0, leftSlice, topSlice)
-        if (drawTop)
-            graphicsContext->drawImage(image.get(), IntRect(borderImageRect.location(), IntSize(leftWidth, topWidth)),
-                                       LayoutRect(0, 0, leftSlice, topSlice), op);
-
-        // The bottom left corner rect is (tx, ty + h - bottomWidth, leftWidth, bottomWidth)
-        // The rect to use from within the image is (0, imageHeight - bottomSlice, leftSlice, botomSlice)
-        if (drawBottom)
-            graphicsContext->drawImage(image.get(), IntRect(borderImageRect.x(), borderImageRect.maxY() - bottomWidth, leftWidth, bottomWidth),
-                                       LayoutRect(0, imageHeight - bottomSlice, leftSlice, bottomSlice), op);
-
-        // Paint the left edge.
-        // Have to scale and tile into the border rect.
-        if (sourceHeight > 0)
-            graphicsContext->drawTiledImage(image.get(), IntRect(borderImageRect.x(), borderImageRect.y() + topWidth, leftWidth, destinationHeight),
-                                            IntRect(0, topSlice, leftSlice, sourceHeight),
-                                            FloatSize(leftSideScale, leftSideScale), Image::StretchTile, (Image::TileRule)vRule, op);
-    }
-
-    if (drawRight) {
-        // Paint the top and bottom right corners
-        // The top right corner rect is (tx + w - rightWidth, ty, rightWidth, topWidth)
-        // The rect to use from within the image is obtained from our slice, and is (imageWidth - rightSlice, 0, rightSlice, topSlice)
-        if (drawTop)
-            graphicsContext->drawImage(image.get(), IntRect(borderImageRect.maxX() - rightWidth, borderImageRect.y(), rightWidth, topWidth),
-                                       LayoutRect(imageWidth - rightSlice, 0, rightSlice, topSlice), op);
-
-        // The bottom right corner rect is (tx + w - rightWidth, ty + h - bottomWidth, rightWidth, bottomWidth)
-        // The rect to use from within the image is (imageWidth - rightSlice, imageHeight - bottomSlice, rightSlice, bottomSlice)
-        if (drawBottom)
-            graphicsContext->drawImage(image.get(), IntRect(borderImageRect.maxX() - rightWidth, borderImageRect.maxY() - bottomWidth, rightWidth, bottomWidth),
-                                       LayoutRect(imageWidth - rightSlice, imageHeight - bottomSlice, rightSlice, bottomSlice), op);
-
-        // Paint the right edge.
-        if (sourceHeight > 0)
-            graphicsContext->drawTiledImage(image.get(), IntRect(borderImageRect.maxX() - rightWidth, borderImageRect.y() + topWidth, rightWidth,
-                                            destinationHeight),
-                                            IntRect(imageWidth - rightSlice, topSlice, rightSlice, sourceHeight),
-                                            FloatSize(rightSideScale, rightSideScale),
-                                            Image::StretchTile, (Image::TileRule)vRule, op);
-    }
-
-    // Paint the top edge.
-    if (drawTop && sourceWidth > 0)
-        graphicsContext->drawTiledImage(image.get(), IntRect(borderImageRect.x() + leftWidth, borderImageRect.y(), destinationWidth, topWidth),
-                                        IntRect(leftSlice, 0, sourceWidth, topSlice),
-                                        FloatSize(topSideScale, topSideScale), (Image::TileRule)hRule, Image::StretchTile, op);
-
-    // Paint the bottom edge.
-    if (drawBottom && sourceWidth > 0)
-        graphicsContext->drawTiledImage(image.get(), IntRect(borderImageRect.x() + leftWidth, borderImageRect.maxY() - bottomWidth,
-                                        destinationWidth, bottomWidth),
-                                        IntRect(leftSlice, imageHeight - bottomSlice, sourceWidth, bottomSlice),
-                                        FloatSize(bottomSideScale, bottomSideScale),
-                                        (Image::TileRule)hRule, Image::StretchTile, op);
-
-    // Paint the middle.
-    if (drawMiddle) {
-        FloatSize middleScaleFactor(1, 1);
-        if (drawTop)
-            middleScaleFactor.setWidth(topSideScale);
-        else if (drawBottom)
-            middleScaleFactor.setWidth(bottomSideScale);
-        if (drawLeft)
-            middleScaleFactor.setHeight(leftSideScale);
-        else if (drawRight)
-            middleScaleFactor.setHeight(rightSideScale);
-
-        // For "stretch" rules, just override the scale factor and replace. We only had to do this for the
-        // center tile, since sides don't even use the scale factor unless they have a rule other than "stretch".
-        // The middle however can have "stretch" specified in one axis but not the other, so we have to
-        // correct the scale here.
-        if (hRule == StretchImageRule)
-            middleScaleFactor.setWidth(destinationWidth / sourceWidth);
-
-        if (vRule == StretchImageRule)
-            middleScaleFactor.setHeight(destinationHeight / sourceHeight);
-
-        graphicsContext->drawTiledImage(image.get(),
-            IntRect(borderImageRect.x() + leftWidth, borderImageRect.y() + topWidth, destinationWidth, destinationHeight),
-            IntRect(leftSlice, topSlice, sourceWidth, sourceHeight),
-            middleScaleFactor, (Image::TileRule)hRule, (Image::TileRule)vRule, op);
-    }
-
-    return true;
-}
-
-static bool allCornersClippedOut(const RoundedRect& border, const LayoutRect& clipRect)
-{
-    LayoutRect boundingRect = border.rect();
-    if (clipRect.contains(boundingRect))
-        return false;
-
-    RoundedRect::Radii radii = border.radii();
-
-    LayoutRect topLeftRect(boundingRect.location(), radii.topLeft());
-    if (clipRect.intersects(topLeftRect))
-        return false;
-
-    LayoutRect topRightRect(boundingRect.location(), radii.topRight());
-    topRightRect.setX(boundingRect.maxX() - topRightRect.width());
-    if (clipRect.intersects(topRightRect))
-        return false;
-
-    LayoutRect bottomLeftRect(boundingRect.location(), radii.bottomLeft());
-    bottomLeftRect.setY(boundingRect.maxY() - bottomLeftRect.height());
-    if (clipRect.intersects(bottomLeftRect))
-        return false;
-
-    LayoutRect bottomRightRect(boundingRect.location(), radii.bottomRight());
-    bottomRightRect.setX(boundingRect.maxX() - bottomRightRect.width());
-    bottomRightRect.setY(boundingRect.maxY() - bottomRightRect.height());
-    if (clipRect.intersects(bottomRightRect))
-        return false;
-
-    return true;
-}
-
-static bool borderWillArcInnerEdge(const LayoutSize& firstRadius, const FloatSize& secondRadius)
-{
-    return !firstRadius.isZero() || !secondRadius.isZero();
-}
-
-enum BorderEdgeFlag {
-    TopBorderEdge = 1 << BSTop,
-    RightBorderEdge = 1 << BSRight,
-    BottomBorderEdge = 1 << BSBottom,
-    LeftBorderEdge = 1 << BSLeft,
-    AllBorderEdges = TopBorderEdge | BottomBorderEdge | LeftBorderEdge | RightBorderEdge
-};
-
-static inline BorderEdgeFlag edgeFlagForSide(BoxSide side)
-{
-    return static_cast<BorderEdgeFlag>(1 << side);
-}
-
-static inline bool includesEdge(BorderEdgeFlags flags, BoxSide side)
-{
-    return flags & edgeFlagForSide(side);
-}
-
-static inline bool includesAdjacentEdges(BorderEdgeFlags flags)
-{
-    return (flags & (TopBorderEdge | RightBorderEdge)) == (TopBorderEdge | RightBorderEdge)
-        || (flags & (RightBorderEdge | BottomBorderEdge)) == (RightBorderEdge | BottomBorderEdge)
-        || (flags & (BottomBorderEdge | LeftBorderEdge)) == (BottomBorderEdge | LeftBorderEdge)
-        || (flags & (LeftBorderEdge | TopBorderEdge)) == (LeftBorderEdge | TopBorderEdge);
-}
-
-inline bool styleRequiresClipPolygon(EBorderStyle style)
-{
-    return style == DOTTED || style == DASHED; // These are drawn with a stroke, so we have to clip to get corner miters.
-}
-
-static bool borderStyleFillsBorderArea(EBorderStyle style)
-{
-    return !(style == DOTTED || style == DASHED || style == DOUBLE);
-}
-
-static bool borderStyleHasInnerDetail(EBorderStyle style)
-{
-    return style == GROOVE || style == RIDGE || style == DOUBLE;
-}
-
-static bool borderStyleIsDottedOrDashed(EBorderStyle style)
-{
-    return style == DOTTED || style == DASHED;
-}
-
-// OUTSET darkens the bottom and right (and maybe lightens the top and left)
-// INSET darkens the top and left (and maybe lightens the bottom and right)
-static inline bool borderStyleHasUnmatchedColorsAtCorner(EBorderStyle style, BoxSide side, BoxSide adjacentSide)
-{
-    // These styles match at the top/left and bottom/right.
-    if (style == INSET || style == GROOVE || style == RIDGE || style == OUTSET) {
-        const BorderEdgeFlags topRightFlags = edgeFlagForSide(BSTop) | edgeFlagForSide(BSRight);
-        const BorderEdgeFlags bottomLeftFlags = edgeFlagForSide(BSBottom) | edgeFlagForSide(BSLeft);
-
-        BorderEdgeFlags flags = edgeFlagForSide(side) | edgeFlagForSide(adjacentSide);
-        return flags == topRightFlags || flags == bottomLeftFlags;
-    }
-    return false;
-}
-
-static inline bool colorsMatchAtCorner(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[])
-{
-    if (edges[side].shouldRender() != edges[adjacentSide].shouldRender())
-        return false;
-
-    if (!edges[side].sharesColorWith(edges[adjacentSide]))
-        return false;
-
-    return !borderStyleHasUnmatchedColorsAtCorner(edges[side].borderStyle(), side, adjacentSide);
-}
-
-
-static inline bool colorNeedsAntiAliasAtCorner(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[])
-{
-    if (!edges[side].color.hasAlpha())
-        return false;
-
-    if (edges[side].shouldRender() != edges[adjacentSide].shouldRender())
-        return false;
-
-    if (!edges[side].sharesColorWith(edges[adjacentSide]))
-        return true;
-
-    return borderStyleHasUnmatchedColorsAtCorner(edges[side].borderStyle(), side, adjacentSide);
-}
-
-// This assumes that we draw in order: top, bottom, left, right.
-static inline bool willBeOverdrawn(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[])
-{
-    switch (side) {
-    case BSTop:
-    case BSBottom:
-        if (edges[adjacentSide].presentButInvisible())
-            return false;
-
-        if (!edges[side].sharesColorWith(edges[adjacentSide]) && edges[adjacentSide].color.hasAlpha())
-            return false;
-
-        if (!borderStyleFillsBorderArea(edges[adjacentSide].borderStyle()))
-            return false;
-
-        return true;
-
-    case BSLeft:
-    case BSRight:
-        // These draw last, so are never overdrawn.
-        return false;
-    }
-    return false;
-}
-
-static inline bool borderStylesRequireMitre(BoxSide side, BoxSide adjacentSide, EBorderStyle style, EBorderStyle adjacentStyle)
-{
-    if (style == DOUBLE || adjacentStyle == DOUBLE || adjacentStyle == GROOVE || adjacentStyle == RIDGE)
-        return true;
-
-    if (borderStyleIsDottedOrDashed(style) != borderStyleIsDottedOrDashed(adjacentStyle))
-        return true;
-
-    if (style != adjacentStyle)
-        return true;
-
-    return borderStyleHasUnmatchedColorsAtCorner(style, side, adjacentSide);
-}
-
-static bool joinRequiresMitre(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[], bool allowOverdraw)
-{
-    if ((edges[side].isTransparent && edges[adjacentSide].isTransparent) || !edges[adjacentSide].isPresent)
-        return false;
-
-    if (allowOverdraw && willBeOverdrawn(side, adjacentSide, edges))
-        return false;
-
-    if (!edges[side].sharesColorWith(edges[adjacentSide]))
-        return true;
-
-    if (borderStylesRequireMitre(side, adjacentSide, edges[side].borderStyle(), edges[adjacentSide].borderStyle()))
-        return true;
-
-    return false;
-}
-
-void RenderBoxModelObject::paintOneBorderSide(GraphicsContext* graphicsContext, const RenderStyle* style, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
-    const IntRect& sideRect, BoxSide side, BoxSide adjacentSide1, BoxSide adjacentSide2, const BorderEdge edges[], const Path* path,
-    BackgroundBleedAvoidance bleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias, const Color* overrideColor)
-{
-    const BorderEdge& edgeToRender = edges[side];
-    ASSERT(edgeToRender.width);
-    const BorderEdge& adjacentEdge1 = edges[adjacentSide1];
-    const BorderEdge& adjacentEdge2 = edges[adjacentSide2];
-
-    bool mitreAdjacentSide1 = joinRequiresMitre(side, adjacentSide1, edges, !antialias);
-    bool mitreAdjacentSide2 = joinRequiresMitre(side, adjacentSide2, edges, !antialias);
-
-    bool adjacentSide1StylesMatch = colorsMatchAtCorner(side, adjacentSide1, edges);
-    bool adjacentSide2StylesMatch = colorsMatchAtCorner(side, adjacentSide2, edges);
-
-    const Color& colorToPaint = overrideColor ? *overrideColor : edgeToRender.color;
-
-    if (path) {
-        GraphicsContextStateSaver stateSaver(*graphicsContext);
-        if (innerBorder.isRenderable())
-            clipBorderSidePolygon(graphicsContext, outerBorder, innerBorder, side, adjacentSide1StylesMatch, adjacentSide2StylesMatch);
-        else
-            clipBorderSideForComplexInnerPath(graphicsContext, outerBorder, innerBorder, side, edges);
-        float thickness = std::max(std::max(edgeToRender.width, adjacentEdge1.width), adjacentEdge2.width);
-        drawBoxSideFromPath(graphicsContext, outerBorder.rect(), *path, edges, edgeToRender.width, thickness, side, style,
-            colorToPaint, edgeToRender.borderStyle(), bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge);
-    } else {
-        bool clipForStyle = styleRequiresClipPolygon(edgeToRender.borderStyle()) && (mitreAdjacentSide1 || mitreAdjacentSide2);
-        bool clipAdjacentSide1 = colorNeedsAntiAliasAtCorner(side, adjacentSide1, edges) && mitreAdjacentSide1;
-        bool clipAdjacentSide2 = colorNeedsAntiAliasAtCorner(side, adjacentSide2, edges) && mitreAdjacentSide2;
-        bool shouldClip = clipForStyle || clipAdjacentSide1 || clipAdjacentSide2;
-
-        GraphicsContextStateSaver clipStateSaver(*graphicsContext, shouldClip);
-        if (shouldClip) {
-            bool aliasAdjacentSide1 = clipAdjacentSide1 || (clipForStyle && mitreAdjacentSide1);
-            bool aliasAdjacentSide2 = clipAdjacentSide2 || (clipForStyle && mitreAdjacentSide2);
-            clipBorderSidePolygon(graphicsContext, outerBorder, innerBorder, side, !aliasAdjacentSide1, !aliasAdjacentSide2);
-            // Since we clipped, no need to draw with a mitre.
-            mitreAdjacentSide1 = false;
-            mitreAdjacentSide2 = false;
-        }
-
-        drawLineForBoxSide(graphicsContext, sideRect.x(), sideRect.y(), sideRect.maxX(), sideRect.maxY(), side, colorToPaint, edgeToRender.borderStyle(),
-                mitreAdjacentSide1 ? adjacentEdge1.width : 0, mitreAdjacentSide2 ? adjacentEdge2.width : 0, antialias);
-    }
-}
-
-static IntRect calculateSideRect(const RoundedRect& outerBorder, const BorderEdge edges[], int side)
-{
-    IntRect sideRect = outerBorder.rect();
-    int width = edges[side].width;
-
-    if (side == BSTop)
-        sideRect.setHeight(width);
-    else if (side == BSBottom)
-        sideRect.shiftYEdgeTo(sideRect.maxY() - width);
-    else if (side == BSLeft)
-        sideRect.setWidth(width);
-    else
-        sideRect.shiftXEdgeTo(sideRect.maxX() - width);
-
-    return sideRect;
-}
-
-void RenderBoxModelObject::paintBorderSides(GraphicsContext* graphicsContext, const RenderStyle* style, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
-    const IntPoint& innerBorderAdjustment, const BorderEdge edges[], BorderEdgeFlags edgeSet, BackgroundBleedAvoidance bleedAvoidance,
-    bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias, const Color* overrideColor)
-{
-    bool renderRadii = outerBorder.isRounded();
-
-    Path roundedPath;
-    if (renderRadii)
-        roundedPath.addRoundedRect(outerBorder);
-
-    // The inner border adjustment for bleed avoidance mode BackgroundBleedBackgroundOverBorder
-    // is only applied to sideRect, which is okay since BackgroundBleedBackgroundOverBorder
-    // is only to be used for solid borders and the shape of the border painted by drawBoxSideFromPath
-    // only depends on sideRect when painting solid borders.
-
-    if (edges[BSTop].shouldRender() && includesEdge(edgeSet, BSTop)) {
-        IntRect sideRect = outerBorder.rect();
-        sideRect.setHeight(edges[BSTop].width + innerBorderAdjustment.y());
-
-        bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSTop].borderStyle()) || borderWillArcInnerEdge(innerBorder.radii().topLeft(), innerBorder.radii().topRight()));
-        paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSTop, BSLeft, BSRight, edges, usePath ? &roundedPath : 0, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor);
-    }
-
-    if (edges[BSBottom].shouldRender() && includesEdge(edgeSet, BSBottom)) {
-        IntRect sideRect = outerBorder.rect();
-        sideRect.shiftYEdgeTo(sideRect.maxY() - edges[BSBottom].width - innerBorderAdjustment.y());
-
-        bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSBottom].borderStyle()) || borderWillArcInnerEdge(innerBorder.radii().bottomLeft(), innerBorder.radii().bottomRight()));
-        paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSBottom, BSLeft, BSRight, edges, usePath ? &roundedPath : 0, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor);
-    }
-
-    if (edges[BSLeft].shouldRender() && includesEdge(edgeSet, BSLeft)) {
-        IntRect sideRect = outerBorder.rect();
-        sideRect.setWidth(edges[BSLeft].width + innerBorderAdjustment.x());
-
-        bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSLeft].borderStyle()) || borderWillArcInnerEdge(innerBorder.radii().bottomLeft(), innerBorder.radii().topLeft()));
-        paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSLeft, BSTop, BSBottom, edges, usePath ? &roundedPath : 0, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor);
-    }
-
-    if (edges[BSRight].shouldRender() && includesEdge(edgeSet, BSRight)) {
-        IntRect sideRect = outerBorder.rect();
-        sideRect.shiftXEdgeTo(sideRect.maxX() - edges[BSRight].width - innerBorderAdjustment.x());
-
-        bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSRight].borderStyle()) || borderWillArcInnerEdge(innerBorder.radii().bottomRight(), innerBorder.radii().topRight()));
-        paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSRight, BSTop, BSBottom, edges, usePath ? &roundedPath : 0, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor);
-    }
-}
-
-void RenderBoxModelObject::paintTranslucentBorderSides(GraphicsContext* graphicsContext, const RenderStyle* style, const RoundedRect& outerBorder, const RoundedRect& innerBorder, const IntPoint& innerBorderAdjustment,
-    const BorderEdge edges[], BorderEdgeFlags edgesToDraw, BackgroundBleedAvoidance bleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias)
-{
-    // willBeOverdrawn assumes that we draw in order: top, bottom, left, right.
-    // This is different from BoxSide enum order.
-    static const BoxSide paintOrder[] = { BSTop, BSBottom, BSLeft, BSRight };
-
-    while (edgesToDraw) {
-        // Find undrawn edges sharing a color.
-        Color commonColor;
-
-        BorderEdgeFlags commonColorEdgeSet = 0;
-        for (size_t i = 0; i < sizeof(paintOrder) / sizeof(paintOrder[0]); ++i) {
-            BoxSide currSide = paintOrder[i];
-            if (!includesEdge(edgesToDraw, currSide))
-                continue;
-
-            bool includeEdge;
-            if (!commonColorEdgeSet) {
-                commonColor = edges[currSide].color;
-                includeEdge = true;
-            } else
-                includeEdge = edges[currSide].color == commonColor;
-
-            if (includeEdge)
-                commonColorEdgeSet |= edgeFlagForSide(currSide);
-        }
-
-        bool useTransparencyLayer = includesAdjacentEdges(commonColorEdgeSet) && commonColor.hasAlpha();
-        if (useTransparencyLayer) {
-            graphicsContext->beginTransparencyLayer(static_cast<float>(commonColor.alpha()) / 255);
-            commonColor = Color(commonColor.red(), commonColor.green(), commonColor.blue());
-        }
-
-        paintBorderSides(graphicsContext, style, outerBorder, innerBorder, innerBorderAdjustment, edges, commonColorEdgeSet, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, &commonColor);
-
-        if (useTransparencyLayer)
-            graphicsContext->endLayer();
-
-        edgesToDraw &= ~commonColorEdgeSet;
-    }
-}
-
-void RenderBoxModelObject::paintBorder(const PaintInfo& info, const LayoutRect& rect, const RenderStyle* style,
-                                       BackgroundBleedAvoidance bleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
-{
-    GraphicsContext* graphicsContext = info.context;
-    // border-image is not affected by border-radius.
-    if (paintNinePieceImage(graphicsContext, rect, style, style->borderImage()))
-        return;
-
-    BorderEdge edges[4];
-    style->getBorderEdgeInfo(edges, includeLogicalLeftEdge, includeLogicalRightEdge);
-    RoundedRect outerBorder = style->getRoundedBorderFor(rect, includeLogicalLeftEdge, includeLogicalRightEdge);
-    RoundedRect innerBorder = style->getRoundedInnerBorderFor(borderInnerRectAdjustedForBleedAvoidance(graphicsContext, rect, bleedAvoidance), includeLogicalLeftEdge, includeLogicalRightEdge);
-
-    if (outerBorder.rect().isEmpty())
-        return;
-
-    bool haveAlphaColor = false;
-    bool haveAllSolidEdges = true;
-    bool haveAllDoubleEdges = true;
-    int numEdgesVisible = 4;
-    bool allEdgesShareColor = true;
-    bool allEdgesShareWidth = true;
-    int firstVisibleEdge = -1;
-    BorderEdgeFlags edgesToDraw = 0;
-
-    for (int i = BSTop; i <= BSLeft; ++i) {
-        const BorderEdge& currEdge = edges[i];
-
-        if (edges[i].shouldRender())
-            edgesToDraw |= edgeFlagForSide(static_cast<BoxSide>(i));
-
-        if (currEdge.presentButInvisible()) {
-            --numEdgesVisible;
-            allEdgesShareColor = false;
-            allEdgesShareWidth = false;
-            continue;
-        }
-
-        if (!currEdge.shouldRender()) {
-            --numEdgesVisible;
-            continue;
-        }
-
-        if (firstVisibleEdge == -1) {
-            firstVisibleEdge = i;
-        } else {
-            if (currEdge.color != edges[firstVisibleEdge].color)
-                allEdgesShareColor = false;
-            if (currEdge.width != edges[firstVisibleEdge].width)
-                allEdgesShareWidth = false;
-        }
-
-        if (currEdge.color.hasAlpha())
-            haveAlphaColor = true;
-
-        if (currEdge.borderStyle() != SOLID)
-            haveAllSolidEdges = false;
-
-        if (currEdge.borderStyle() != DOUBLE)
-            haveAllDoubleEdges = false;
-    }
-
-    // If no corner intersects the clip region, we can pretend outerBorder is
-    // rectangular to improve performance.
-    if (haveAllSolidEdges && outerBorder.isRounded() && allCornersClippedOut(outerBorder, info.rect))
-        outerBorder.setRadii(RoundedRect::Radii());
-
-    // isRenderable() check avoids issue described in https://bugs.webkit.org/show_bug.cgi?id=38787
-    if ((haveAllSolidEdges || haveAllDoubleEdges) && allEdgesShareColor && innerBorder.isRenderable()) {
-        // Fast path for drawing all solid edges and all unrounded double edges
-
-        if (numEdgesVisible == 4 && (outerBorder.isRounded() || haveAlphaColor)
-            && (haveAllSolidEdges || (!outerBorder.isRounded() && !innerBorder.isRounded()))) {
-            Path path;
-
-            if (outerBorder.isRounded() && allEdgesShareWidth) {
-
-                // Very fast path for single stroked round rect with circular corners
-
-                graphicsContext->fillBetweenRoundedRects(outerBorder, innerBorder, edges[firstVisibleEdge].color);
-                return;
-            }
-            if (outerBorder.isRounded() && bleedAvoidance != BackgroundBleedClipBackground)
-                path.addRoundedRect(outerBorder);
-            else
-                path.addRect(outerBorder.rect());
-
-            if (haveAllDoubleEdges) {
-                IntRect innerThirdRect = outerBorder.rect();
-                IntRect outerThirdRect = outerBorder.rect();
-                for (int side = BSTop; side <= BSLeft; ++side) {
-                    int outerWidth;
-                    int innerWidth;
-                    edges[side].getDoubleBorderStripeWidths(outerWidth, innerWidth);
-
-                    if (side == BSTop) {
-                        innerThirdRect.shiftYEdgeTo(innerThirdRect.y() + innerWidth);
-                        outerThirdRect.shiftYEdgeTo(outerThirdRect.y() + outerWidth);
-                    } else if (side == BSBottom) {
-                        innerThirdRect.setHeight(innerThirdRect.height() - innerWidth);
-                        outerThirdRect.setHeight(outerThirdRect.height() - outerWidth);
-                    } else if (side == BSLeft) {
-                        innerThirdRect.shiftXEdgeTo(innerThirdRect.x() + innerWidth);
-                        outerThirdRect.shiftXEdgeTo(outerThirdRect.x() + outerWidth);
-                    } else {
-                        innerThirdRect.setWidth(innerThirdRect.width() - innerWidth);
-                        outerThirdRect.setWidth(outerThirdRect.width() - outerWidth);
-                    }
-                }
-
-                RoundedRect outerThird = outerBorder;
-                RoundedRect innerThird = innerBorder;
-                innerThird.setRect(innerThirdRect);
-                outerThird.setRect(outerThirdRect);
-
-                if (outerThird.isRounded() && bleedAvoidance != BackgroundBleedClipBackground)
-                    path.addRoundedRect(outerThird);
-                else
-                    path.addRect(outerThird.rect());
-
-                if (innerThird.isRounded() && bleedAvoidance != BackgroundBleedClipBackground)
-                    path.addRoundedRect(innerThird);
-                else
-                    path.addRect(innerThird.rect());
-            }
-
-            if (innerBorder.isRounded())
-                path.addRoundedRect(innerBorder);
-            else
-                path.addRect(innerBorder.rect());
-
-            graphicsContext->setFillRule(RULE_EVENODD);
-            graphicsContext->setFillColor(edges[firstVisibleEdge].color);
-            graphicsContext->fillPath(path);
-            return;
-        }
-        // Avoid creating transparent layers
-        if (haveAllSolidEdges && numEdgesVisible != 4 && !outerBorder.isRounded() && haveAlphaColor) {
-            Path path;
-
-            for (int i = BSTop; i <= BSLeft; ++i) {
-                const BorderEdge& currEdge = edges[i];
-                if (currEdge.shouldRender()) {
-                    IntRect sideRect = calculateSideRect(outerBorder, edges, i);
-                    path.addRect(sideRect);
-                }
-            }
-
-            graphicsContext->setFillRule(RULE_NONZERO);
-            graphicsContext->setFillColor(edges[firstVisibleEdge].color);
-            graphicsContext->fillPath(path);
-            return;
-        }
-    }
-
-    bool clipToOuterBorder = outerBorder.isRounded();
-    GraphicsContextStateSaver stateSaver(*graphicsContext, clipToOuterBorder);
-    if (clipToOuterBorder) {
-        // Clip to the inner and outer radii rects.
-        if (bleedAvoidance != BackgroundBleedClipBackground)
-            graphicsContext->clipRoundedRect(outerBorder);
-        // isRenderable() check avoids issue described in https://bugs.webkit.org/show_bug.cgi?id=38787
-        // The inside will be clipped out later (in clipBorderSideForComplexInnerPath)
-        if (innerBorder.isRenderable() && !innerBorder.isEmpty())
-            graphicsContext->clipOutRoundedRect(innerBorder);
-    }
-
-    // If only one edge visible antialiasing doesn't create seams
-    bool antialias = shouldAntialiasLines(graphicsContext) || numEdgesVisible == 1;
-    RoundedRect unadjustedInnerBorder = (bleedAvoidance == BackgroundBleedBackgroundOverBorder) ? style->getRoundedInnerBorderFor(rect, includeLogicalLeftEdge, includeLogicalRightEdge) : innerBorder;
-    IntPoint innerBorderAdjustment(innerBorder.rect().x() - unadjustedInnerBorder.rect().x(), innerBorder.rect().y() - unadjustedInnerBorder.rect().y());
-    if (haveAlphaColor)
-        paintTranslucentBorderSides(graphicsContext, style, outerBorder, unadjustedInnerBorder, innerBorderAdjustment, edges, edgesToDraw, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias);
-    else
-        paintBorderSides(graphicsContext, style, outerBorder, unadjustedInnerBorder, innerBorderAdjustment, edges, edgesToDraw, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias);
-}
-
-void RenderBoxModelObject::drawBoxSideFromPath(GraphicsContext* graphicsContext, const LayoutRect& borderRect, const Path& borderPath, const BorderEdge edges[],
-    float thickness, float drawThickness, BoxSide side, const RenderStyle* style, Color color, EBorderStyle borderStyle, BackgroundBleedAvoidance bleedAvoidance,
-    bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
-{
-    if (thickness <= 0)
-        return;
-
-    if (borderStyle == DOUBLE && thickness < 3)
-        borderStyle = SOLID;
-
-    switch (borderStyle) {
-    case BNONE:
-    case BHIDDEN:
-        return;
-    case DOTTED:
-    case DASHED: {
-        graphicsContext->setStrokeColor(color);
-
-        // The stroke is doubled here because the provided path is the
-        // outside edge of the border so half the stroke is clipped off.
-        // The extra multiplier is so that the clipping mask can antialias
-        // the edges to prevent jaggies.
-        graphicsContext->setStrokeThickness(drawThickness * 2 * 1.1f);
-        graphicsContext->setStrokeStyle(borderStyle == DASHED ? DashedStroke : DottedStroke);
-
-        // If the number of dashes that fit in the path is odd and non-integral then we
-        // will have an awkwardly-sized dash at the end of the path. To try to avoid that
-        // here, we simply make the whitespace dashes ever so slightly bigger.
-        // FIXME: This could be even better if we tried to manipulate the dash offset
-        // and possibly the gapLength to get the corners dash-symmetrical.
-        float dashLength = thickness * ((borderStyle == DASHED) ? 3.0f : 1.0f);
-        float gapLength = dashLength;
-        float numberOfDashes = borderPath.length() / dashLength;
-        // Don't try to show dashes if we have less than 2 dashes + 2 gaps.
-        // FIXME: should do this test per side.
-        if (numberOfDashes >= 4) {
-            bool evenNumberOfFullDashes = !((int)numberOfDashes % 2);
-            bool integralNumberOfDashes = !(numberOfDashes - (int)numberOfDashes);
-            if (!evenNumberOfFullDashes && !integralNumberOfDashes) {
-                float numberOfGaps = numberOfDashes / 2;
-                gapLength += (dashLength  / numberOfGaps);
-            }
-
-            DashArray lineDash;
-            lineDash.append(dashLength);
-            lineDash.append(gapLength);
-            graphicsContext->setLineDash(lineDash, dashLength);
-        }
-
-        // FIXME: stroking the border path causes issues with tight corners:
-        // https://bugs.webkit.org/show_bug.cgi?id=58711
-        // Also, to get the best appearance we should stroke a path between the two borders.
-        graphicsContext->strokePath(borderPath);
-        return;
-    }
-    case DOUBLE: {
-        // Get the inner border rects for both the outer border line and the inner border line
-        int outerBorderTopWidth;
-        int innerBorderTopWidth;
-        edges[BSTop].getDoubleBorderStripeWidths(outerBorderTopWidth, innerBorderTopWidth);
-
-        int outerBorderRightWidth;
-        int innerBorderRightWidth;
-        edges[BSRight].getDoubleBorderStripeWidths(outerBorderRightWidth, innerBorderRightWidth);
-
-        int outerBorderBottomWidth;
-        int innerBorderBottomWidth;
-        edges[BSBottom].getDoubleBorderStripeWidths(outerBorderBottomWidth, innerBorderBottomWidth);
-
-        int outerBorderLeftWidth;
-        int innerBorderLeftWidth;
-        edges[BSLeft].getDoubleBorderStripeWidths(outerBorderLeftWidth, innerBorderLeftWidth);
-
-        // Draw inner border line
-        {
-            GraphicsContextStateSaver stateSaver(*graphicsContext);
-            RoundedRect innerClip = style->getRoundedInnerBorderFor(borderRect,
-                innerBorderTopWidth, innerBorderBottomWidth, innerBorderLeftWidth, innerBorderRightWidth,
-                includeLogicalLeftEdge, includeLogicalRightEdge);
-
-            graphicsContext->clipRoundedRect(innerClip);
-            drawBoxSideFromPath(graphicsContext, borderRect, borderPath, edges, thickness, drawThickness, side, style, color, SOLID, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge);
-        }
-
-        // Draw outer border line
-        {
-            GraphicsContextStateSaver stateSaver(*graphicsContext);
-            LayoutRect outerRect = borderRect;
-            if (bleedAvoidance == BackgroundBleedClipBackground) {
-                outerRect.inflate(1);
-                ++outerBorderTopWidth;
-                ++outerBorderBottomWidth;
-                ++outerBorderLeftWidth;
-                ++outerBorderRightWidth;
-            }
-
-            RoundedRect outerClip = style->getRoundedInnerBorderFor(outerRect,
-                outerBorderTopWidth, outerBorderBottomWidth, outerBorderLeftWidth, outerBorderRightWidth,
-                includeLogicalLeftEdge, includeLogicalRightEdge);
-            graphicsContext->clipOutRoundedRect(outerClip);
-            drawBoxSideFromPath(graphicsContext, borderRect, borderPath, edges, thickness, drawThickness, side, style, color, SOLID, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge);
-        }
-        return;
-    }
-    case RIDGE:
-    case GROOVE:
-    {
-        EBorderStyle s1;
-        EBorderStyle s2;
-        if (borderStyle == GROOVE) {
-            s1 = INSET;
-            s2 = OUTSET;
-        } else {
-            s1 = OUTSET;
-            s2 = INSET;
-        }
-
-        // Paint full border
-        drawBoxSideFromPath(graphicsContext, borderRect, borderPath, edges, thickness, drawThickness, side, style, color, s1, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge);
-
-        // Paint inner only
-        GraphicsContextStateSaver stateSaver(*graphicsContext);
-        LayoutUnit topWidth = edges[BSTop].usedWidth() / 2;
-        LayoutUnit bottomWidth = edges[BSBottom].usedWidth() / 2;
-        LayoutUnit leftWidth = edges[BSLeft].usedWidth() / 2;
-        LayoutUnit rightWidth = edges[BSRight].usedWidth() / 2;
-
-        RoundedRect clipRect = style->getRoundedInnerBorderFor(borderRect,
-            topWidth, bottomWidth, leftWidth, rightWidth,
-            includeLogicalLeftEdge, includeLogicalRightEdge);
-
-        graphicsContext->clipRoundedRect(clipRect);
-        drawBoxSideFromPath(graphicsContext, borderRect, borderPath, edges, thickness, drawThickness, side, style, color, s2, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge);
-        return;
-    }
-    case INSET:
-        if (side == BSTop || side == BSLeft)
-            color = color.dark();
-        break;
-    case OUTSET:
-        if (side == BSBottom || side == BSRight)
-            color = color.dark();
-        break;
-    default:
-        break;
-    }
-
-    graphicsContext->setStrokeStyle(NoStroke);
-    graphicsContext->setFillColor(color);
-    graphicsContext->drawRect(pixelSnappedIntRect(borderRect));
-}
-
-void RenderBoxModelObject::clipBorderSidePolygon(GraphicsContext* graphicsContext, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
-                                                 BoxSide side, bool firstEdgeMatches, bool secondEdgeMatches)
-{
-    FloatPoint quad[4];
-
-    const LayoutRect& outerRect = outerBorder.rect();
-    const LayoutRect& innerRect = innerBorder.rect();
-
-    FloatPoint centerPoint(innerRect.location().x().toFloat() + innerRect.width().toFloat() / 2, innerRect.location().y().toFloat() + innerRect.height().toFloat() / 2);
-
-    // For each side, create a quad that encompasses all parts of that side that may draw,
-    // including areas inside the innerBorder.
-    //
-    //         0----------------3
-    //       0  \              /  0
-    //       |\  1----------- 2  /|
-    //       | 1                1 |
-    //       | |                | |
-    //       | |                | |
-    //       | 2                2 |
-    //       |/  1------------2  \|
-    //       3  /              \  3
-    //         0----------------3
-    //
-    switch (side) {
-    case BSTop:
-        quad[0] = outerRect.minXMinYCorner();
-        quad[1] = innerRect.minXMinYCorner();
-        quad[2] = innerRect.maxXMinYCorner();
-        quad[3] = outerRect.maxXMinYCorner();
-
-        if (!innerBorder.radii().topLeft().isZero()) {
-            findIntersection(quad[0], quad[1],
-                FloatPoint(
-                    quad[1].x() + innerBorder.radii().topLeft().width(),
-                    quad[1].y()),
-                FloatPoint(
-                    quad[1].x(),
-                    quad[1].y() + innerBorder.radii().topLeft().height()),
-                quad[1]);
-        }
-
-        if (!innerBorder.radii().topRight().isZero()) {
-            findIntersection(quad[3], quad[2],
-                FloatPoint(
-                    quad[2].x() - innerBorder.radii().topRight().width(),
-                    quad[2].y()),
-                FloatPoint(
-                    quad[2].x(),
-                    quad[2].y() + innerBorder.radii().topRight().height()),
-                quad[2]);
-        }
-        break;
-
-    case BSLeft:
-        quad[0] = outerRect.minXMinYCorner();
-        quad[1] = innerRect.minXMinYCorner();
-        quad[2] = innerRect.minXMaxYCorner();
-        quad[3] = outerRect.minXMaxYCorner();
-
-        if (!innerBorder.radii().topLeft().isZero()) {
-            findIntersection(quad[0], quad[1],
-                FloatPoint(
-                    quad[1].x() + innerBorder.radii().topLeft().width(),
-                    quad[1].y()),
-                FloatPoint(
-                    quad[1].x(),
-                    quad[1].y() + innerBorder.radii().topLeft().height()),
-                quad[1]);
-        }
-
-        if (!innerBorder.radii().bottomLeft().isZero()) {
-            findIntersection(quad[3], quad[2],
-                FloatPoint(
-                    quad[2].x() + innerBorder.radii().bottomLeft().width(),
-                    quad[2].y()),
-                FloatPoint(
-                    quad[2].x(),
-                    quad[2].y() - innerBorder.radii().bottomLeft().height()),
-                quad[2]);
-        }
-        break;
-
-    case BSBottom:
-        quad[0] = outerRect.minXMaxYCorner();
-        quad[1] = innerRect.minXMaxYCorner();
-        quad[2] = innerRect.maxXMaxYCorner();
-        quad[3] = outerRect.maxXMaxYCorner();
-
-        if (!innerBorder.radii().bottomLeft().isZero()) {
-            findIntersection(quad[0], quad[1],
-                FloatPoint(
-                    quad[1].x() + innerBorder.radii().bottomLeft().width(),
-                    quad[1].y()),
-                FloatPoint(
-                    quad[1].x(),
-                    quad[1].y() - innerBorder.radii().bottomLeft().height()),
-                quad[1]);
-        }
-
-        if (!innerBorder.radii().bottomRight().isZero()) {
-            findIntersection(quad[3], quad[2],
-                FloatPoint(
-                    quad[2].x() - innerBorder.radii().bottomRight().width(),
-                    quad[2].y()),
-                FloatPoint(
-                    quad[2].x(),
-                    quad[2].y() - innerBorder.radii().bottomRight().height()),
-                quad[2]);
-        }
-        break;
-
-    case BSRight:
-        quad[0] = outerRect.maxXMinYCorner();
-        quad[1] = innerRect.maxXMinYCorner();
-        quad[2] = innerRect.maxXMaxYCorner();
-        quad[3] = outerRect.maxXMaxYCorner();
-
-        if (!innerBorder.radii().topRight().isZero()) {
-            findIntersection(quad[0], quad[1],
-                FloatPoint(
-                    quad[1].x() - innerBorder.radii().topRight().width(),
-                    quad[1].y()),
-                FloatPoint(
-                    quad[1].x(),
-                    quad[1].y() + innerBorder.radii().topRight().height()),
-                quad[1]);
-        }
-
-        if (!innerBorder.radii().bottomRight().isZero()) {
-            findIntersection(quad[3], quad[2],
-                FloatPoint(
-                    quad[2].x() - innerBorder.radii().bottomRight().width(),
-                    quad[2].y()),
-                FloatPoint(
-                    quad[2].x(),
-                    quad[2].y() - innerBorder.radii().bottomRight().height()),
-                quad[2]);
-        }
-        break;
-    }
-
-    // If the border matches both of its adjacent sides, don't anti-alias the clip, and
-    // if neither side matches, anti-alias the clip.
-    if (firstEdgeMatches == secondEdgeMatches) {
-        graphicsContext->clipConvexPolygon(4, quad, !firstEdgeMatches);
-        return;
-    }
-
-    // If antialiasing settings for the first edge and second edge is different,
-    // they have to be addressed separately. We do this by breaking the quad into
-    // two parallelograms, made by moving quad[1] and quad[2].
-    float ax = quad[1].x() - quad[0].x();
-    float ay = quad[1].y() - quad[0].y();
-    float bx = quad[2].x() - quad[1].x();
-    float by = quad[2].y() - quad[1].y();
-    float cx = quad[3].x() - quad[2].x();
-    float cy = quad[3].y() - quad[2].y();
-
-    const static float kEpsilon = 1e-2f;
-    float r1, r2;
-    if (fabsf(bx) < kEpsilon && fabsf(by) < kEpsilon) {
-        // The quad was actually a triangle.
-        r1 = r2 = 1.0f;
-    } else {
-        // Extend parallelogram a bit to hide calculation error
-        const static float kExtendFill = 1e-2f;
-
-        r1 = (-ax * by + ay * bx) / (cx * by - cy * bx) + kExtendFill;
-        r2 = (-cx * by + cy * bx) / (ax * by - ay * bx) + kExtendFill;
-    }
-
-    FloatPoint firstQuad[4];
-    firstQuad[0] = quad[0];
-    firstQuad[1] = quad[1];
-    firstQuad[2] = FloatPoint(quad[3].x() + r2 * ax, quad[3].y() + r2 * ay);
-    firstQuad[3] = quad[3];
-    graphicsContext->clipConvexPolygon(4, firstQuad, !firstEdgeMatches);
-
-    FloatPoint secondQuad[4];
-    secondQuad[0] = quad[0];
-    secondQuad[1] = FloatPoint(quad[0].x() - r1 * cx, quad[0].y() - r1 * cy);
-    secondQuad[2] = quad[2];
-    secondQuad[3] = quad[3];
-    graphicsContext->clipConvexPolygon(4, secondQuad, !secondEdgeMatches);
-}
-
-static IntRect calculateSideRectIncludingInner(const RoundedRect& outerBorder, const BorderEdge edges[], BoxSide side)
-{
-    IntRect sideRect = outerBorder.rect();
-    int width;
-
-    switch (side) {
-    case BSTop:
-        width = sideRect.height() - edges[BSBottom].width;
-        sideRect.setHeight(width);
-        break;
-    case BSBottom:
-        width = sideRect.height() - edges[BSTop].width;
-        sideRect.shiftYEdgeTo(sideRect.maxY() - width);
-        break;
-    case BSLeft:
-        width = sideRect.width() - edges[BSRight].width;
-        sideRect.setWidth(width);
-        break;
-    case BSRight:
-        width = sideRect.width() - edges[BSLeft].width;
-        sideRect.shiftXEdgeTo(sideRect.maxX() - width);
-        break;
-    }
-
-    return sideRect;
-}
-
-static RoundedRect calculateAdjustedInnerBorder(const RoundedRect&innerBorder, BoxSide side)
-{
-    // Expand the inner border as necessary to make it a rounded rect (i.e. radii contained within each edge).
-    // This function relies on the fact we only get radii not contained within each edge if one of the radii
-    // for an edge is zero, so we can shift the arc towards the zero radius corner.
-    RoundedRect::Radii newRadii = innerBorder.radii();
-    IntRect newRect = innerBorder.rect();
-
-    float overshoot;
-    float maxRadii;
-
-    switch (side) {
-    case BSTop:
-        overshoot = newRadii.topLeft().width() + newRadii.topRight().width() - newRect.width();
-        if (overshoot > 0) {
-            ASSERT(!(newRadii.topLeft().width() && newRadii.topRight().width()));
-            newRect.setWidth(newRect.width() + overshoot);
-            if (!newRadii.topLeft().width())
-                newRect.move(-overshoot, 0);
-        }
-        newRadii.setBottomLeft(IntSize(0, 0));
-        newRadii.setBottomRight(IntSize(0, 0));
-        maxRadii = std::max(newRadii.topLeft().height(), newRadii.topRight().height());
-        if (maxRadii > newRect.height())
-            newRect.setHeight(maxRadii);
-        break;
-
-    case BSBottom:
-        overshoot = newRadii.bottomLeft().width() + newRadii.bottomRight().width() - newRect.width();
-        if (overshoot > 0) {
-            ASSERT(!(newRadii.bottomLeft().width() && newRadii.bottomRight().width()));
-            newRect.setWidth(newRect.width() + overshoot);
-            if (!newRadii.bottomLeft().width())
-                newRect.move(-overshoot, 0);
-        }
-        newRadii.setTopLeft(IntSize(0, 0));
-        newRadii.setTopRight(IntSize(0, 0));
-        maxRadii = std::max(newRadii.bottomLeft().height(), newRadii.bottomRight().height());
-        if (maxRadii > newRect.height()) {
-            newRect.move(0, newRect.height() - maxRadii);
-            newRect.setHeight(maxRadii);
-        }
-        break;
-
-    case BSLeft:
-        overshoot = newRadii.topLeft().height() + newRadii.bottomLeft().height() - newRect.height();
-        if (overshoot > 0) {
-            ASSERT(!(newRadii.topLeft().height() && newRadii.bottomLeft().height()));
-            newRect.setHeight(newRect.height() + overshoot);
-            if (!newRadii.topLeft().height())
-                newRect.move(0, -overshoot);
-        }
-        newRadii.setTopRight(IntSize(0, 0));
-        newRadii.setBottomRight(IntSize(0, 0));
-        maxRadii = std::max(newRadii.topLeft().width(), newRadii.bottomLeft().width());
-        if (maxRadii > newRect.width())
-            newRect.setWidth(maxRadii);
-        break;
-
-    case BSRight:
-        overshoot = newRadii.topRight().height() + newRadii.bottomRight().height() - newRect.height();
-        if (overshoot > 0) {
-            ASSERT(!(newRadii.topRight().height() && newRadii.bottomRight().height()));
-            newRect.setHeight(newRect.height() + overshoot);
-            if (!newRadii.topRight().height())
-                newRect.move(0, -overshoot);
-        }
-        newRadii.setTopLeft(IntSize(0, 0));
-        newRadii.setBottomLeft(IntSize(0, 0));
-        maxRadii = std::max(newRadii.topRight().width(), newRadii.bottomRight().width());
-        if (maxRadii > newRect.width()) {
-            newRect.move(newRect.width() - maxRadii, 0);
-            newRect.setWidth(maxRadii);
-        }
-        break;
-    }
-
-    return RoundedRect(newRect, newRadii);
-}
-
-void RenderBoxModelObject::clipBorderSideForComplexInnerPath(GraphicsContext* graphicsContext, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
-    BoxSide side, const BorderEdge edges[])
-{
-    graphicsContext->clip(calculateSideRectIncludingInner(outerBorder, edges, side));
-    RoundedRect adjustedInnerRect = calculateAdjustedInnerBorder(innerBorder, side);
-    if (!adjustedInnerRect.isEmpty())
-        graphicsContext->clipOutRoundedRect(adjustedInnerRect);
-}
-
 bool RenderBoxModelObject::boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance bleedAvoidance, InlineFlowBox* inlineFlowBox) const
 {
     if (bleedAvoidance != BackgroundBleedNone)
         return false;
 
     if (style()->hasAppearance())
         return false;
 
     const ShadowList* shadowList = style()->boxShadow();
     if (!shadowList)
@@ skipping 33 matching lines @@
 
     if (inlineFlowBox && !inlineFlowBox->boxShadowCanBeAppliedToBackground(*lastBackgroundLayer))
         return false;
 
     if (hasOverflowClip() && lastBackgroundLayer->attachment() == LocalBackgroundAttachment)
         return false;
 
     return true;
 }
 
-void RenderBoxModelObject::paintBoxShadow(const PaintInfo& info, const LayoutRect& paintRect, const RenderStyle* s, ShadowStyle shadowStyle, bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
-{
-    // FIXME: Deal with border-image.  Would be great to use border-image as a mask.
-    GraphicsContext* context = info.context;
-    if (!s->boxShadow())
-        return;
 
-    RoundedRect border = (shadowStyle == Inset) ? s->getRoundedInnerBorderFor(paintRect, includeLogicalLeftEdge, includeLogicalRightEdge)
-        : s->getRoundedBorderFor(paintRect, includeLogicalLeftEdge, includeLogicalRightEdge);
-
-    bool hasBorderRadius = s->hasBorderRadius();
-    bool isHorizontal = s->isHorizontalWritingMode();
-    bool hasOpaqueBackground = s->visitedDependentColor(CSSPropertyBackgroundColor).alpha() == 255;
-
-    GraphicsContextStateSaver stateSaver(*context, false);
-
-    const ShadowList* shadowList = s->boxShadow();
-    for (size_t i = shadowList->shadows().size(); i--; ) {
-        const ShadowData& shadow = shadowList->shadows()[i];
-        if (shadow.style() != shadowStyle)
-            continue;
-
-        FloatSize shadowOffset(shadow.x(), shadow.y());
-        float shadowBlur = shadow.blur();
-        float shadowSpread = shadow.spread();
-
-        if (shadowOffset.isZero() && !shadowBlur && !shadowSpread)
-            continue;
-
-        const Color& shadowColor = shadow.color();
-
-        if (shadow.style() == Normal) {
-            FloatRect fillRect = border.rect();
-            fillRect.inflate(shadowSpread);
-            if (fillRect.isEmpty())
-                continue;
-
-            FloatRect shadowRect(border.rect());
-            shadowRect.inflate(shadowBlur + shadowSpread);
-            shadowRect.move(shadowOffset);
-
-            // Save the state and clip, if not already done.
-            // The clip does not depend on any shadow-specific properties.
-            if (!stateSaver.saved()) {
-                stateSaver.save();
-                if (hasBorderRadius) {
-                    RoundedRect rectToClipOut = border;
-
-                    // If the box is opaque, it is unnecessary to clip it out. However, doing so saves time
-                    // when painting the shadow. On the other hand, it introduces subpixel gaps along the
-                    // corners. Those are avoided by insetting the clipping path by one pixel.
-                    if (hasOpaqueBackground)
-                        rectToClipOut.inflateWithRadii(-1);
-
-                    if (!rectToClipOut.isEmpty()) {
-                        context->clipOutRoundedRect(rectToClipOut);
-                    }
-                } else {
-                    // This IntRect is correct even with fractional shadows, because it is used for the rectangle
-                    // of the box itself, which is always pixel-aligned.
-                    IntRect rectToClipOut = border.rect();
-
-                    // If the box is opaque, it is unnecessary to clip it out. However, doing so saves time
-                    // when painting the shadow. On the other hand, it introduces subpixel gaps along the
-                    // edges if they are not pixel-aligned. Those are avoided by insetting the clipping path
-                    // by one pixel.
-                    if (hasOpaqueBackground) {
-                        // FIXME: The function to decide on the policy based on the transform should be a named function.
-                        // FIXME: It's not clear if this check is right. What about integral scale factors?
-                        // FIXME: See crbug.com/382491. The use of getCTM may also be wrong because it does not include
-                        // device zoom applied at raster time.
-                        AffineTransform transform = context->getCTM();
-                        if (transform.a() != 1 || (transform.d() != 1 && transform.d() != -1) || transform.b() || transform.c())
-                            rectToClipOut.inflate(-1);
-                    }
-
-                    if (!rectToClipOut.isEmpty()) {
-                        context->clipOut(rectToClipOut);
-                    }
-                }
-            }
-
-            // Draw only the shadow.
-            OwnPtr<DrawLooperBuilder> drawLooperBuilder = DrawLooperBuilder::create();
-            drawLooperBuilder->addShadow(shadowOffset, shadowBlur, shadowColor,
-                DrawLooperBuilder::ShadowRespectsTransforms, DrawLooperBuilder::ShadowIgnoresAlpha);
-            context->setDrawLooper(drawLooperBuilder.release());
-
-            if (hasBorderRadius) {
-                RoundedRect influenceRect(pixelSnappedIntRect(LayoutRect(shadowRect)), border.radii());
-                influenceRect.expandRadii(2 * shadowBlur + shadowSpread);
-                if (allCornersClippedOut(influenceRect, info.rect))
-                    context->fillRect(fillRect, Color::black);
-                else {
-                    // TODO: support non-integer shadows - crbug.com/334829
-                    RoundedRect roundedFillRect = border;
-                    roundedFillRect.inflate(shadowSpread);
-
-                    roundedFillRect.expandRadii(shadowSpread);
-                    if (!roundedFillRect.isRenderable())
-                        roundedFillRect.adjustRadii();
-                    context->fillRoundedRect(roundedFillRect, Color::black);
-                }
-            } else {
-                context->fillRect(fillRect, Color::black);
-            }
-        } else {
-            // The inset shadow case.
-            GraphicsContext::Edges clippedEdges = GraphicsContext::NoEdge;
-            if (!includeLogicalLeftEdge) {
-                if (isHorizontal)
-                    clippedEdges |= GraphicsContext::LeftEdge;
-                else
-                    clippedEdges |= GraphicsContext::TopEdge;
-            }
-            if (!includeLogicalRightEdge) {
-                if (isHorizontal)
-                    clippedEdges |= GraphicsContext::RightEdge;
-                else
-                    clippedEdges |= GraphicsContext::BottomEdge;
-            }
-            // TODO: support non-integer shadows - crbug.com/334828
-            context->drawInnerShadow(border, shadowColor, flooredIntSize(shadowOffset), shadowBlur, shadowSpread, clippedEdges);
-        }
-    }
-}
 
 LayoutUnit RenderBoxModelObject::containingBlockLogicalWidthForContent() const
 {
     return containingBlock()->availableLogicalWidth();
 }
 
 RenderBoxModelObject* RenderBoxModelObject::continuation() const
 {
     if (!continuationMap)
         return 0;
@@ skipping 101 matching lines @@
         break;
     }
     x = std::min(x, std::max<LayoutUnit>(maxX - caretWidth, 0));
 
     LayoutUnit height = style()->fontMetrics().height();
     LayoutUnit verticalSpace = lineHeight(true, currentStyle->isHorizontalWritingMode() ? HorizontalLine : VerticalLine,  PositionOfInteriorLineBoxes) - height;
     LayoutUnit y = paddingTop() + borderTop() + (verticalSpace / 2);
     return currentStyle->isHorizontalWritingMode() ? LayoutRect(x, y, caretWidth, height) : LayoutRect(y, x, height, caretWidth);
 }
 
-bool RenderBoxModelObject::shouldAntialiasLines(GraphicsContext* context)
-{
-    // FIXME: We may want to not antialias when scaled by an integral value,
-    // and we may want to antialias when translated by a non-integral value.
-    // FIXME: See crbug.com/382491. getCTM does not include scale factors applied at raster time, such
-    // as device zoom.
-    return !context->getCTM().isIdentityOrTranslationOrFlipped();
-}
-
 void RenderBoxModelObject::mapAbsoluteToLocalPoint(MapCoordinatesFlags mode, TransformState& transformState) const
 {
     RenderObject* o = container();
     if (!o)
         return;
 
     if (o->isRenderFlowThread())
         transformState.move(o->columnOffset(LayoutPoint(transformState.mappedPoint())));
 
     o->mapAbsoluteToLocalPoint(mode, transformState);
@@ skipping 84 matching lines @@
     ASSERT(!beforeChild || toBoxModelObject == beforeChild->parent());
     for (RenderObject* child = startChild; child && child != endChild; ) {
         // Save our next sibling as moveChildTo will clear it.
         RenderObject* nextSibling = child->nextSibling();
         moveChildTo(toBoxModelObject, child, beforeChild, fullRemoveInsert);
         child = nextSibling;
     }
 }
 
 } // namespace blink