C++ SVGResources::filter方法代码示例

void SVGRenderSupport::finishRenderSVGContent(RenderObject* object, PaintInfo& paintInfo, GraphicsContext* savedContext)
{
#if !ENABLE(FILTERS)
    UNUSED_PARAM(savedContext);
#endif

    ASSERT(object);

    const RenderStyle* style = object->style();
    ASSERT(style);

    const SVGRenderStyle* svgStyle = style->svgStyle();
    ASSERT(svgStyle);

#if ENABLE(FILTERS)
    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
    if (resources) {
        if (RenderSVGResourceFilter* filter = resources->filter()) {
            filter->postApplyResource(object, paintInfo.context, ApplyToDefaultMode, /* path */0);
            paintInfo.context = savedContext;
        }
    }
#endif

    if (style->opacity() < 1)
        paintInfo.context->endTransparencyLayer();

    if (svgStyle->shadow())
        paintInfo.context->endTransparencyLayer();
}

void SVGRenderSupport::intersectRepaintRectWithResources(const RenderObject* object, FloatRect& repaintRect)
{
    ASSERT(object);

    RenderStyle* style = object->style();
    ASSERT(style);

    const SVGRenderStyle* svgStyle = style->svgStyle();
    ASSERT(svgStyle);

    RenderObject* renderer = const_cast<RenderObject*>(object);
    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(renderer);
    if (!resources) {
        if (const ShadowData* shadow = svgStyle->shadow())
            shadow->adjustRectForShadow(repaintRect);
        return;
    }

#if ENABLE(FILTERS)
    if (RenderSVGResourceFilter* filter = resources->filter())
        repaintRect = filter->resourceBoundingBox(renderer);
#endif

    if (RenderSVGResourceClipper* clipper = resources->clipper())
        repaintRect.intersect(clipper->resourceBoundingBox(renderer));

    if (RenderSVGResourceMasker* masker = resources->masker())
        repaintRect.intersect(masker->resourceBoundingBox(renderer));

    if (const ShadowData* shadow = svgStyle->shadow())
        shadow->adjustRectForShadow(repaintRect);
}

bool RenderSVGRoot::selfWillPaint()
{
#if ENABLE(FILTERS)
    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
    return resources && resources->filter();
#else
    return false;
#endif
}

void RenderSVGRoot::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
    // An empty viewport disables rendering.
    if (pixelSnappedBorderBoxRect().isEmpty())
        return;

    // Don't paint, if the context explicitly disabled it.
    if (paintInfo.context->paintingDisabled())
        return;

    // SVG outlines are painted during PaintPhaseForeground.
    if (paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline)
        return;

    // An empty viewBox also disables rendering.
    // (http://www.w3.org/TR/SVG/coords.html#ViewBoxAttribute)
    SVGSVGElement* svg = toSVGSVGElement(node());
    ASSERT(svg);
    if (svg->hasEmptyViewBox())
        return;

    // Don't paint if we don't have kids, except if we have filters we should paint those.
    if (!firstChild()) {
        SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
        if (!resources || !resources->filter())
            return;
    }

    // Make a copy of the PaintInfo because applyTransform will modify the damage rect.
    PaintInfo childPaintInfo(paintInfo);
    childPaintInfo.context->save();

    // Apply initial viewport clip
    if (shouldApplyViewportClip())
        childPaintInfo.context->clip(pixelSnappedIntRect(overflowClipRect(paintOffset)));

    // Convert from container offsets (html renderers) to a relative transform (svg renderers).
    // Transform from our paint container's coordinate system to our local coords.
    IntPoint adjustedPaintOffset = roundedIntPoint(paintOffset);
    childPaintInfo.applyTransform(AffineTransform::translation(adjustedPaintOffset.x(), adjustedPaintOffset.y()) * localToBorderBoxTransform());

    // SVGRenderingContext must be destroyed before we restore the childPaintInfo.context, because a filter may have
    // changed the context and it is only reverted when the SVGRenderingContext destructor finishes applying the filter.
    {
        SVGRenderingContext renderingContext;
        bool continueRendering = true;
        if (childPaintInfo.phase == PaintPhaseForeground) {
            renderingContext.prepareToRenderSVGContent(this, childPaintInfo);
            continueRendering = renderingContext.isRenderingPrepared();
        }

        if (continueRendering)
            RenderBox::paint(childPaintInfo, LayoutPoint());
    }

    childPaintInfo.context->restore();
}

bool SVGRenderSupport::prepareToRenderSVGContent(RenderObject* object, PaintInfo& paintInfo)
{
    ASSERT(object);

    RenderStyle* style = object->style();
    ASSERT(style);

    const SVGRenderStyle* svgStyle = style->svgStyle();
    ASSERT(svgStyle);

    // Setup transparency layers before setting up SVG resources!
    float opacity = style->opacity();
    const ShadowData* shadow = svgStyle->shadow();
    if (opacity < 1 || shadow) {
        FloatRect repaintRect = object->repaintRectInLocalCoordinates();

        if (opacity < 1) {
            paintInfo.context->clip(repaintRect);
            paintInfo.context->beginTransparencyLayer(opacity);
        }

        if (shadow) {
            paintInfo.context->clip(repaintRect);
            paintInfo.context->setShadow(IntSize(shadow->x(), shadow->y()), shadow->blur(), shadow->color(), style->colorSpace());
            paintInfo.context->beginTransparencyLayer(1);
        }
    }

    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
    if (!resources) {
#if ENABLE(FILTERS)
        if (svgStyle->hasFilter())
            return false;
#endif
        return true;
    }

    if (RenderSVGResourceMasker* masker = resources->masker()) {
        if (!masker->applyResource(object, style, paintInfo.context, ApplyToDefaultMode))
            return false;
    }

    if (RenderSVGResourceClipper* clipper = resources->clipper()) {
        if (!clipper->applyResource(object, style, paintInfo.context, ApplyToDefaultMode))
            return false;
    }

#if ENABLE(FILTERS)
    if (RenderSVGResourceFilter* filter = resources->filter()) {
        if (!filter->applyResource(object, style, paintInfo.context, ApplyToDefaultMode))
            return false;
    }
#endif

    return true;
}

void RenderSVGRoot::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
    // An empty viewport disables rendering.
    if (pixelSnappedBorderBoxRect().isEmpty())
        return;

    // Don't paint, if the context explicitely disabled it.
    if (paintInfo.context->paintingDisabled())
        return;

    Page* page = 0;
    if (Frame* frame = this->frame())
        page = frame->page();

    // Don't paint if we don't have kids, except if we have filters we should paint those.
    if (!firstChild()) {
        SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
        if (!resources || !resources->filter()) {
            if (page && paintInfo.phase == PaintPhaseForeground)
                page->addRelevantUnpaintedObject(this, visualOverflowRect());
            return;
        }
    }

    if (page && paintInfo.phase == PaintPhaseForeground)
        page->addRelevantRepaintedObject(this, visualOverflowRect());

    // Make a copy of the PaintInfo because applyTransform will modify the damage rect.
    PaintInfo childPaintInfo(paintInfo);
    childPaintInfo.context->save();

    // Apply initial viewport clip - not affected by overflow handling
    childPaintInfo.context->clip(pixelSnappedIntRect(overflowClipRect(paintOffset, paintInfo.renderRegion)));

    // Convert from container offsets (html renderers) to a relative transform (svg renderers).
    // Transform from our paint container's coordinate system to our local coords.
    IntPoint adjustedPaintOffset = roundedIntPoint(paintOffset);
    childPaintInfo.applyTransform(AffineTransform::translation(adjustedPaintOffset.x(), adjustedPaintOffset.y()) * localToBorderBoxTransform());

    // SVGRenderingContext must be destroyed before we restore the childPaintInfo.context, because a filter may have
    // changed the context and it is only reverted when the SVGRenderingContext destructor finishes applying the filter.
    {
        SVGRenderingContext renderingContext;
        bool continueRendering = true;
        if (childPaintInfo.phase == PaintPhaseForeground) {
            renderingContext.prepareToRenderSVGContent(this, childPaintInfo);
            continueRendering = renderingContext.isRenderingPrepared();
        }

        if (continueRendering)
            RenderBox::paint(childPaintInfo, LayoutPoint());
    }

    childPaintInfo.context->restore();
}

void SVGResourcesCache::clientLayoutChanged(LayoutObject* object)
{
    SVGResources* resources = SVGResourcesCache::cachedResourcesForLayoutObject(object);
    if (!resources)
        return;

    // Invalidate the resources if either the LayoutObject itself changed,
    // or we have filter resources, which could depend on the layout of children.
    if (object->selfNeedsLayout() || resources->filter())
        resources->removeClientFromCache(object);
}

bool SVGRenderSupport::filtersForceContainerLayout(RenderObject* object)
{
    // If any of this container's children need to be laid out, and a filter is applied
    // to the container, we need to repaint the entire container.
    if (!object->normalChildNeedsLayout())
        return false;

    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
    if (!resources || !resources->filter())
        return false;

    return true;
}

void SVGResourcesCache::clientUpdatedFromElement(RenderObject* renderer, const RenderStyle* newStyle)
{
    ASSERT(renderer);
    ASSERT(renderer->parent());

    SVGResourcesCache* cache = resourcesCacheFromRenderObject(renderer);
    cache->removeResourcesFromRenderObject(renderer);
    cache->addResourcesFromRenderObject(renderer, newStyle);

#if ENABLE(FILTERS)
    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(renderer);
    if (resources && resources->filter())
        resources->removeClientFromCache(renderer);
#endif
}

void SVGLayoutSupport::intersectPaintInvalidationRectWithResources(const LayoutObject* layoutObject, FloatRect& paintInvalidationRect)
{
    ASSERT(layoutObject);

    SVGResources* resources = SVGResourcesCache::cachedResourcesForLayoutObject(layoutObject);
    if (!resources)
        return;

    if (LayoutSVGResourceFilter* filter = resources->filter())
        paintInvalidationRect = filter->resourceBoundingBox(layoutObject);

    if (LayoutSVGResourceClipper* clipper = resources->clipper())
        paintInvalidationRect.intersect(clipper->resourceBoundingBox(layoutObject));

    if (LayoutSVGResourceMasker* masker = resources->masker())
        paintInvalidationRect.intersect(masker->resourceBoundingBox(layoutObject));
}

void SVGRenderSupport::intersectRepaintRectWithResources(const RenderObject* renderer, FloatRect& repaintRect)
{
    ASSERT(renderer);

    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(renderer);
    if (!resources)
        return;

    if (RenderSVGResourceFilter* filter = resources->filter())
        repaintRect = filter->resourceBoundingBox(renderer);

    if (RenderSVGResourceClipper* clipper = resources->clipper())
        repaintRect.intersect(clipper->resourceBoundingBox(renderer));

    if (RenderSVGResourceMasker* masker = resources->masker())
        repaintRect.intersect(masker->resourceBoundingBox(renderer));
}

void SVGRenderSupport::intersectRepaintRectWithResources(const RenderElement& renderer, FloatRect& repaintRect)
{
    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(&renderer);
    if (!resources)
        return;

#if ENABLE(FILTERS)
    if (RenderSVGResourceFilter* filter = resources->filter())
        repaintRect = filter->resourceBoundingBox(renderer);
#endif

    if (RenderSVGResourceClipper* clipper = resources->clipper())
        repaintRect.intersect(clipper->resourceBoundingBox(renderer));

    if (RenderSVGResourceMasker* masker = resources->masker())
        repaintRect.intersect(masker->resourceBoundingBox(renderer));
}

void SVGRootPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
    // An empty viewport disables rendering.
    if (m_layoutSVGRoot.pixelSnappedBorderBoxRect().isEmpty())
        return;

    // SVG outlines are painted during PaintPhaseForeground.
    if (shouldPaintSelfOutline(paintInfo.phase))
        return;

    // An empty viewBox also disables rendering.
    // (http://www.w3.org/TR/SVG/coords.html#ViewBoxAttribute)
    SVGSVGElement* svg = toSVGSVGElement(m_layoutSVGRoot.node());
    ASSERT(svg);
    if (svg->hasEmptyViewBox())
        return;

    // Don't paint if we don't have kids, except if we have filters we should paint those.
    if (!m_layoutSVGRoot.firstChild()) {
        SVGResources* resources = SVGResourcesCache::cachedResourcesForLayoutObject(&m_layoutSVGRoot);
        if (!resources || !resources->filter())
            return;
    }

    PaintInfo paintInfoBeforeFiltering(paintInfo);

    // At the HTML->SVG boundary, SVGRoot will have a paint offset transform
    // paint property but may not have a PaintLayer, so we need to update the
    // paint properties here since they will not be updated by PaintLayer
    // (See: PaintPropertyTreeBuilder::createPaintOffsetTranslationIfNeeded).
    Optional<ScopedPaintChunkProperties> paintOffsetTranslationPropertyScope;
    if (RuntimeEnabledFeatures::slimmingPaintV2Enabled() && !m_layoutSVGRoot.hasLayer()) {
        const auto* objectProperties = m_layoutSVGRoot.objectPaintProperties();
        if (objectProperties && objectProperties->paintOffsetTranslation()) {
            auto& paintController = paintInfoBeforeFiltering.context.paintController();
            PaintChunkProperties properties(paintController.currentPaintChunkProperties());
            properties.transform = objectProperties->paintOffsetTranslation();
            paintOffsetTranslationPropertyScope.emplace(paintController, properties);
        }
    }

    // Apply initial viewport clip.
    Optional<ClipRecorder> clipRecorder;
    if (m_layoutSVGRoot.shouldApplyViewportClip()) {
        // TODO(pdr): Clip the paint info cull rect here.
        clipRecorder.emplace(paintInfoBeforeFiltering.context, m_layoutSVGRoot, paintInfoBeforeFiltering.displayItemTypeForClipping(), LayoutRect(pixelSnappedIntRect(m_layoutSVGRoot.overflowClipRect(paintOffset))));
    }

    // Convert from container offsets (html layoutObjects) to a relative transform (svg layoutObjects).
    // Transform from our paint container's coordinate system to our local coords.
    IntPoint adjustedPaintOffset = roundedIntPoint(paintOffset);
    AffineTransform paintOffsetToBorderBox = AffineTransform::translation(adjustedPaintOffset.x(), adjustedPaintOffset.y()) * m_layoutSVGRoot.localToBorderBoxTransform();
    paintInfoBeforeFiltering.updateCullRect(paintOffsetToBorderBox);
    TransformRecorder transformRecorder(paintInfoBeforeFiltering.context, m_layoutSVGRoot, paintOffsetToBorderBox);

    SVGPaintContext paintContext(m_layoutSVGRoot, paintInfoBeforeFiltering);
    if (paintContext.paintInfo().phase == PaintPhaseForeground && !paintContext.applyClipMaskAndFilterIfNecessary())
        return;

    BoxPainter(m_layoutSVGRoot).paint(paintContext.paintInfo(), LayoutPoint());

    PaintTiming& timing = PaintTiming::from(m_layoutSVGRoot.node()->document().topDocument());
    timing.markFirstContentfulPaint();
}

bool RenderSVGContainer::selfWillPaint()
{
    SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
    return resources && resources->filter();
}

bool SVGLayoutSupport::hasFilterResource(const LayoutObject& object) {
  SVGResources* resources =
      SVGResourcesCache::cachedResourcesForLayoutObject(&object);
  return resources && resources->filter();
}