C++ SVGFilterPrimitiveStandardAttributes::result方法代码示例

PassRefPtr<SVGFilterBuilder> RenderSVGResourceFilter::buildPrimitives(SVGFilter* filter)
{
    SVGFilterElement* filterElement = static_cast<SVGFilterElement*>(node());
    FloatRect targetBoundingBox = filter->targetBoundingBox();

    // Add effects to the builder
    RefPtr<SVGFilterBuilder> builder = SVGFilterBuilder::create(filter);
    for (Node* node = filterElement->firstChild(); node; node = node->nextSibling()) {
        if (!node->isSVGElement())
            continue;

        SVGElement* element = static_cast<SVGElement*>(node);
        if (!element->isFilterEffect())
            continue;

        SVGFilterPrimitiveStandardAttributes* effectElement = static_cast<SVGFilterPrimitiveStandardAttributes*>(element);
        RefPtr<FilterEffect> effect = effectElement->build(builder.get(), filter);
        if (!effect) {
            builder->clearEffects();
            return 0;
        }
        builder->appendEffectToEffectReferences(effect, effectElement->renderer());
        effectElement->setStandardAttributes(effect.get());
        effect->setEffectBoundaries(SVGLengthContext::resolveRectangle<SVGFilterPrimitiveStandardAttributes>(effectElement, filterElement->primitiveUnits(), targetBoundingBox));
        builder->add(effectElement->result(), effect);
    }
    return builder.release();
}

PassRefPtr<SVGFilterBuilder> RenderSVGResourceFilter::buildPrimitives(SVGFilter* filter)
{
    SVGFilterElement* filterElement = toSVGFilterElement(node());
    FloatRect targetBoundingBox = filter->targetBoundingBox();

    // Add effects to the builder
    RefPtr<SVGFilterBuilder> builder = SVGFilterBuilder::create(SourceGraphic::create(filter), SourceAlpha::create(filter));
    for (Node* node = filterElement->firstChild(); node; node = node->nextSibling()) {
        if (!node->isSVGElement())
            continue;

        SVGElement* element = toSVGElement(node);
        if (!element->isFilterEffect())
            continue;

        SVGFilterPrimitiveStandardAttributes* effectElement = static_cast<SVGFilterPrimitiveStandardAttributes*>(element);
        RefPtr<FilterEffect> effect = effectElement->build(builder.get(), filter);
        if (!effect) {
            builder->clearEffects();
            return 0;
        }
        builder->appendEffectToEffectReferences(effect, effectElement->renderer());
        effectElement->setStandardAttributes(effect.get());
        effect->setEffectBoundaries(SVGLengthContext::resolveRectangle<SVGFilterPrimitiveStandardAttributes>(effectElement, filterElement->primitiveUnits(), targetBoundingBox));
        effect->setOperatingColorSpace(
            effectElement->renderer()->style()->svgStyle()->colorInterpolationFilters() == CI_LINEARRGB ? ColorSpaceLinearRGB : ColorSpaceDeviceRGB);
        builder->add(effectElement->result(), effect);
    }
    return builder.release();
}

PassRefPtr<SVGFilterBuilder> RenderSVGResourceFilter::buildPrimitives(Filter* filter)
{
    SVGFilterElement* filterElement = static_cast<SVGFilterElement*>(node());
    bool primitiveBoundingBoxMode = filterElement->primitiveUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX;

    // Add effects to the builder
    RefPtr<SVGFilterBuilder> builder = SVGFilterBuilder::create(filter);
    for (Node* node = filterElement->firstChild(); node; node = node->nextSibling()) {
        if (!node->isSVGElement())
            continue;

        SVGElement* element = static_cast<SVGElement*>(node);
        if (!element->isFilterEffect())
            continue;

        SVGFilterPrimitiveStandardAttributes* effectElement = static_cast<SVGFilterPrimitiveStandardAttributes*>(element);
        RefPtr<FilterEffect> effect = effectElement->build(builder.get(), filter);
        if (!effect) {
            builder->clearEffects();
            return 0;
        }
        builder->appendEffectToEffectReferences(effect);
        effectElement->setStandardAttributes(primitiveBoundingBoxMode, effect.get());
        builder->add(effectElement->result(), effect);
    }
    return builder.release();
}

PassRefPtr<FilterEffect> FilterEffectRenderer::buildReferenceFilter(RenderObject* renderer, PassRefPtr<FilterEffect> previousEffect, ReferenceFilterOperation* filterOperation)
{
#if ENABLE(SVG)
    if (!renderer)
        return 0;

    Document* document = &renderer->document();

    CachedSVGDocumentReference* cachedSVGDocumentReference = filterOperation->cachedSVGDocumentReference();
    CachedSVGDocument* cachedSVGDocument = cachedSVGDocumentReference ? cachedSVGDocumentReference->document() : 0;

    // If we have an SVG document, this is an external reference. Otherwise
    // we look up the referenced node in the current document.
    if (cachedSVGDocument)
        document = cachedSVGDocument->document();

    if (!document)
        return 0;

    Element* filter = document->getElementById(filterOperation->fragment());
    if (!filter) {
        // Although we did not find the referenced filter, it might exist later
        // in the document
        document->accessSVGExtensions()->addPendingResource(filterOperation->fragment(), toElement(renderer->node()));
        return 0;
    }

    RefPtr<FilterEffect> effect;

    // FIXME: Figure out what to do with SourceAlpha. Right now, we're
    // using the alpha of the original input layer, which is obviously
    // wrong. We should probably be extracting the alpha from the 
    // previousEffect, but this requires some more processing.  
    // This may need a spec clarification.
    RefPtr<SVGFilterBuilder> builder = SVGFilterBuilder::create(previousEffect, SourceAlpha::create(this));

    for (SVGElement* svgElement = Traversal<SVGElement>::firstChild(filter); svgElement; svgElement = Traversal<SVGElement>::nextSibling(svgElement)) {
        if (!svgElement->isFilterEffect())
            continue;
        SVGFilterPrimitiveStandardAttributes* effectElement = static_cast<SVGFilterPrimitiveStandardAttributes*>(svgElement);

        effect = effectElement->build(builder.get(), this);
        if (!effect)
            continue;

        effectElement->setStandardAttributes(effect.get());
        builder->add(effectElement->result(), effect);
        m_effects.append(effect);
    }
    return effect;
#else
    UNUSED_PARAM(renderer);
    UNUSED_PARAM(previousEffect);
    UNUSED_PARAM(filterOperation);
    return 0;
#endif
}

PassRefPtr<FilterEffect> FilterEffectRenderer::buildReferenceFilter(Document* document, PassRefPtr<FilterEffect> previousEffect, ReferenceFilterOperation* filterOperation)
{
#if ENABLE(SVG)
    CachedSVGDocumentReference* cachedSVGDocumentReference = filterOperation->cachedSVGDocumentReference();
    CachedSVGDocument* cachedSVGDocument = cachedSVGDocumentReference ? cachedSVGDocumentReference->document() : 0;

    // If we have an SVG document, this is an external reference. Otherwise
    // we look up the referenced node in the current document.
    if (cachedSVGDocument)
        document = cachedSVGDocument->document();

    if (!document)
        return 0;

    Element* filter = document->getElementById(filterOperation->fragment());
    if (!filter)
        return 0;

    RefPtr<FilterEffect> effect;

    // FIXME: Figure out what to do with SourceAlpha. Right now, we're
    // using the alpha of the original input layer, which is obviously
    // wrong. We should probably be extracting the alpha from the 
    // previousEffect, but this requires some more processing.  
    // This may need a spec clarification.
    RefPtr<SVGFilterBuilder> builder = SVGFilterBuilder::create(previousEffect, SourceAlpha::create(this));

    for (Node* node = filter->firstChild(); node; node = node->nextSibling()) {
        if (!node->isSVGElement())
            continue;

        SVGElement* element = static_cast<SVGElement*>(node);
        if (!element->isFilterEffect())
            continue;

        SVGFilterPrimitiveStandardAttributes* effectElement = static_cast<SVGFilterPrimitiveStandardAttributes*>(element);

        effect = effectElement->build(builder.get(), this);
        if (!effect)
            continue;

        effectElement->setStandardAttributes(effect.get());
        builder->add(effectElement->result(), effect);
        m_effects.append(effect);
    }
    return effect;
#else
    UNUSED_PARAM(document);
    UNUSED_PARAM(previousEffect);
    UNUSED_PARAM(filterOperation);
    return 0;
#endif
}

PassRefPtr<FilterEffect> ReferenceFilterBuilder::build(Filter* parentFilter, RenderObject* renderer, FilterEffect* previousEffect, const ReferenceFilterOperation* filterOperation)
{
    if (!renderer)
        return nullptr;

    TreeScope* treeScope = &renderer->node()->treeScope();

    if (DocumentResourceReference* documentResourceRef = documentResourceReference(filterOperation)) {
        DocumentResource* cachedSVGDocument = documentResourceRef->document();

        // If we have an SVG document, this is an external reference. Otherwise
        // we look up the referenced node in the current document.
        if (cachedSVGDocument)
            treeScope = cachedSVGDocument->document();
    }

    if (!treeScope)
        return nullptr;

    Element* filter = treeScope->getElementById(filterOperation->fragment());

    if (!filter) {
        // Although we did not find the referenced filter, it might exist later
        // in the document.
        treeScope->document().accessSVGExtensions().addPendingResource(filterOperation->fragment(), toElement(renderer->node()));
        return nullptr;
    }

    if (!isSVGFilterElement(*filter))
        return nullptr;

    SVGFilterElement& filterElement = toSVGFilterElement(*filter);

    // FIXME: Figure out what to do with SourceAlpha. Right now, we're
    // using the alpha of the original input layer, which is obviously
    // wrong. We should probably be extracting the alpha from the
    // previousEffect, but this requires some more processing.
    // This may need a spec clarification.
    RefPtr<SVGFilterBuilder> builder = SVGFilterBuilder::create(previousEffect, SourceAlpha::create(parentFilter));

    ColorSpace filterColorSpace = ColorSpaceDeviceRGB;
    bool useFilterColorSpace = getSVGElementColorSpace(&filterElement, filterColorSpace);

    for (SVGElement* element = Traversal<SVGElement>::firstChild(filterElement); element; element = Traversal<SVGElement>::nextSibling(*element)) {
        if (!element->isFilterEffect())
            continue;

        SVGFilterPrimitiveStandardAttributes* effectElement = static_cast<SVGFilterPrimitiveStandardAttributes*>(element);

        RefPtr<FilterEffect> effect = effectElement->build(builder.get(), parentFilter);
        if (!effect)
            continue;

        effectElement->setStandardAttributes(effect.get());
        effect->setEffectBoundaries(SVGLengthContext::resolveRectangle<SVGFilterPrimitiveStandardAttributes>(effectElement, filterElement.primitiveUnits()->currentValue()->enumValue(), parentFilter->sourceImageRect()));
        ColorSpace colorSpace = filterColorSpace;
        if (useFilterColorSpace || getSVGElementColorSpace(effectElement, colorSpace))
            effect->setOperatingColorSpace(colorSpace);
        builder->add(AtomicString(effectElement->result()->currentValue()->value()), effect);
    }
    return builder->lastEffect();
}

PassRefPtr<FilterEffect> FilterEffectRenderer::buildReferenceFilter(RenderObject* renderer, PassRefPtr<FilterEffect> previousEffect, ReferenceFilterOperation* filterOperation)
{
    if (!renderer)
        return 0;

    Document* document = renderer->document();
    ASSERT(document);

    CachedSVGDocumentReference* cachedSVGDocumentReference = filterOperation->cachedSVGDocumentReference();
    CachedDocument* cachedSVGDocument = cachedSVGDocumentReference ? cachedSVGDocumentReference->document() : 0;

    // If we have an SVG document, this is an external reference. Otherwise
    // we look up the referenced node in the current document.
    if (cachedSVGDocument)
        document = cachedSVGDocument->document();

    if (!document)
        return 0;

    Element* filter = document->getElementById(filterOperation->fragment());
    if (!filter) {
        // Although we did not find the referenced filter, it might exist later
        // in the document
        document->accessSVGExtensions()->addPendingResource(filterOperation->fragment(), toElement(renderer->node()));
        return 0;
    }

    if (!filter->isSVGElement() || !filter->hasTagName(SVGNames::filterTag))
        return 0;

    SVGFilterElement* filterElement = toSVGFilterElement(toSVGElement(filter));

    RefPtr<FilterEffect> effect;

    // FIXME: Figure out what to do with SourceAlpha. Right now, we're
    // using the alpha of the original input layer, which is obviously
    // wrong. We should probably be extracting the alpha from the 
    // previousEffect, but this requires some more processing.  
    // This may need a spec clarification.
    RefPtr<SVGFilterBuilder> builder = SVGFilterBuilder::create(previousEffect, SourceAlpha::create(this));

    for (Node* node = filterElement->firstChild(); node; node = node->nextSibling()) {
        if (!node->isSVGElement())
            continue;

        SVGElement* element = toSVGElement(node);
        if (!element->isFilterEffect())
            continue;

        SVGFilterPrimitiveStandardAttributes* effectElement = static_cast<SVGFilterPrimitiveStandardAttributes*>(element);

        effect = effectElement->build(builder.get(), this);
        if (!effect)
            continue;

        effectElement->setStandardAttributes(effect.get());
        effect->setEffectBoundaries(SVGLengthContext::resolveRectangle<SVGFilterPrimitiveStandardAttributes>(effectElement, filterElement->primitiveUnits(), sourceImageRect()));
        builder->add(effectElement->result(), effect);
        m_effects.append(effect);
    }
    return effect;
}