C++ SVGResources::stroke方法代码示例

static inline RenderSVGResource* requestPaintingResource(RenderSVGResourceMode mode, RenderObject* object, const RenderStyle* style, Color& fallbackColor)
{
    ASSERT(object);
    ASSERT(style);

    // If we have no style at all, ignore it.
    const SVGRenderStyle* svgStyle = style->svgStyle();
    if (!svgStyle)
        return 0;

    // If we have no fill/stroke, return 0.
    if (mode == ApplyToFillMode) {
        if (!svgStyle->hasFill())
            return 0;
    } else {
        if (!svgStyle->hasStroke())
            return 0;
    }

    bool applyToFill = mode == ApplyToFillMode;
    SVGPaint::SVGPaintType paintType = applyToFill ? svgStyle->fillPaintType() : svgStyle->strokePaintType();
    if (paintType == SVGPaint::SVG_PAINTTYPE_NONE)
        return 0;

    Color color;
    switch (paintType) {
    case SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR:
    case SVGPaint::SVG_PAINTTYPE_RGBCOLOR:
    case SVGPaint::SVG_PAINTTYPE_RGBCOLOR_ICCCOLOR:
    case SVGPaint::SVG_PAINTTYPE_URI_CURRENTCOLOR:
    case SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR:
    case SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR_ICCCOLOR:
        color = applyToFill ? svgStyle->fillPaintColor() : svgStyle->strokePaintColor();
    default:
        break;
    }

    if (style->insideLink() == InsideVisitedLink) {
        RenderStyle* visitedStyle = style->getCachedPseudoStyle(VISITED_LINK);
        ASSERT(visitedStyle);

        const SVGRenderStyle* svgVisitedStyle = visitedStyle->svgStyle();
        SVGPaint::SVGPaintType visitedPaintType = applyToFill ? svgVisitedStyle->fillPaintType() : svgVisitedStyle->strokePaintType();

        // For SVG_PAINTTYPE_CURRENTCOLOR, 'color' already contains the 'visitedColor'.
        if (visitedPaintType < SVGPaint::SVG_PAINTTYPE_URI_NONE && visitedPaintType != SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR) {
            const Color& visitedColor = applyToFill ? svgVisitedStyle->fillPaintColor() : svgVisitedStyle->strokePaintColor();
            if (visitedColor.isValid())
                color = Color(visitedColor.red(), visitedColor.green(), visitedColor.blue(), color.alpha());
        }
    }

    // If the primary resource is just a color, return immediately.
    RenderSVGResourceSolidColor* colorResource = RenderSVGResource::sharedSolidPaintingResource();
    if (paintType < SVGPaint::SVG_PAINTTYPE_URI_NONE) {
        // If an invalid fill color is specified, fallback to fill/stroke="none".
        if (!color.isValid())
            return 0;

        colorResource->setColor(color);
        return colorResource;
    }

    // If no resources are associated with the given renderer, return the color resource.
    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
    if (!resources) {
        // If a paint server is specified, and no or an invalid fallback color is given, default to fill/stroke="black".
        if (!color.isValid())
            color = Color::black;

        colorResource->setColor(color);
        return colorResource;
    }

    // If the requested resource is not available, return the color resource.
    RenderSVGResource* uriResource = mode == ApplyToFillMode ? resources->fill() : resources->stroke();
    if (!uriResource) {
        // If a paint server is specified, and no or an invalid fallback color is given, default to fill/stroke="black".
        if (!color.isValid())
            color = Color::black;

        colorResource->setColor(color);
        return colorResource;
    }

    // The paint server resource exists, though it may be invalid (pattern with width/height=0). Pass the fallback color to our caller
    // so it can use the solid color painting resource, if applyResource() on the URI resource failed.
    fallbackColor = color;
    return uriResource;
}

static inline RenderSVGResource* requestPaintingResource(RenderSVGResourceMode mode, RenderObject* object, const RenderStyle* style, Color& fallbackColor)
{
    ASSERT(object);
    ASSERT(style);

    // If we have no style at all, ignore it.
    const SVGRenderStyle* svgStyle = style->svgStyle();
    if (!svgStyle)
        return 0;

    bool isRenderingMask = false;
    if (object->frame() && object->frame()->view())
        isRenderingMask = object->frame()->view()->paintBehavior() & PaintBehaviorRenderingSVGMask;

    // If we have no fill/stroke, return 0.
    if (mode == ApplyToFillMode) {
        // When rendering the mask for a RenderSVGResourceClipper, always use the initial fill paint server, and ignore stroke.
        if (isRenderingMask) {
            RenderSVGResourceSolidColor* colorResource = RenderSVGResource::sharedSolidPaintingResource();
            colorResource->setColor(SVGRenderStyle::initialFillPaintColor());
            return colorResource;
        }

        if (!svgStyle->hasFill())
            return 0;
    } else {
        if (!svgStyle->hasStroke() || isRenderingMask)
            return 0;
    }

    bool applyToFill = mode == ApplyToFillMode;
    SVGPaint::SVGPaintType paintType = applyToFill ? svgStyle->fillPaintType() : svgStyle->strokePaintType();
    if (paintType == SVGPaint::SVG_PAINTTYPE_NONE)
        return 0;

    Color color;
    switch (paintType) {
    case SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR:
    case SVGPaint::SVG_PAINTTYPE_RGBCOLOR:
    case SVGPaint::SVG_PAINTTYPE_RGBCOLOR_ICCCOLOR:
    case SVGPaint::SVG_PAINTTYPE_URI_CURRENTCOLOR:
    case SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR:
    case SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR_ICCCOLOR:
        color = applyToFill ? svgStyle->fillPaintColor() : svgStyle->strokePaintColor();
    default:
        break;
    }

    if (style->insideLink() == InsideVisitedLink) {
        // FIXME: This code doesn't support the uri component of the visited link paint, https://bugs.webkit.org/show_bug.cgi?id=70006
        SVGPaint::SVGPaintType visitedPaintType = applyToFill ? svgStyle->visitedLinkFillPaintType() : svgStyle->visitedLinkStrokePaintType();

        // For SVG_PAINTTYPE_CURRENTCOLOR, 'color' already contains the 'visitedColor'.
        if (visitedPaintType < SVGPaint::SVG_PAINTTYPE_URI_NONE && visitedPaintType != SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR) {
            const Color& visitedColor = applyToFill ? svgStyle->visitedLinkFillPaintColor() : svgStyle->visitedLinkStrokePaintColor();
            if (visitedColor.isValid())
                color = Color(visitedColor.red(), visitedColor.green(), visitedColor.blue(), color.alpha());
        }
    }

    // If the primary resource is just a color, return immediately.
    RenderSVGResourceSolidColor* colorResource = RenderSVGResource::sharedSolidPaintingResource();
    if (paintType < SVGPaint::SVG_PAINTTYPE_URI_NONE) {
        if (!inheritColorFromParentStyleIfNeeded(object, applyToFill, color))
            return 0;

        colorResource->setColor(color);
        return colorResource;
    }

    // If no resources are associated with the given renderer, return the color resource.
    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
    if (!resources) {
        if (paintType == SVGPaint::SVG_PAINTTYPE_URI_NONE || !inheritColorFromParentStyleIfNeeded(object, applyToFill, color))
            return 0;

        colorResource->setColor(color);
        return colorResource;
    }

    // If the requested resource is not available, return the color resource.
    RenderSVGResource* uriResource = mode == ApplyToFillMode ? resources->fill() : resources->stroke();
    if (!uriResource) {
        if (!inheritColorFromParentStyleIfNeeded(object, applyToFill, color))
            return 0;

        colorResource->setColor(color);
        return colorResource;
    }

    // The paint server resource exists, though it may be invalid (pattern with width/height=0). Pass the fallback color to our caller
    // so it can use the solid color painting resource, if applyResource() on the URI resource failed.
    fallbackColor = color;
    return uriResource;
}