SVGPaintServer LayoutSVGResourcePattern::preparePaintServer(const LayoutObject& object)
{
    clearInvalidationMask();

    SVGPatternElement* patternElement = toSVGPatternElement(element());
    if (!patternElement)
        return SVGPaintServer::invalid();

    if (m_shouldCollectPatternAttributes) {
        patternElement->synchronizeAnimatedSVGAttribute(anyQName());

#if ENABLE(OILPAN)
        m_attributesWrapper->set(PatternAttributes());
#else
        m_attributes = PatternAttributes();
#endif
        patternElement->collectPatternAttributes(mutableAttributes());
        m_shouldCollectPatternAttributes = false;
    }

    // Spec: When the geometry of the applicable element has no width or height and objectBoundingBox is specified,
    // then the given effect (e.g. a gradient or a filter) will be ignored.
    FloatRect objectBoundingBox = object.objectBoundingBox();
    if (attributes().patternUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX && objectBoundingBox.isEmpty())
        return SVGPaintServer::invalid();

    PatternData* patternData = patternForLayoutObject(object);
    if (!patternData || !patternData->pattern)
        return SVGPaintServer::invalid();

    patternData->pattern->setPatternSpaceTransform(patternData->transform);

    return SVGPaintServer(patternData->pattern);
}
SVGPaintServer SVGPaintServer::requestForLayoutObject(const LayoutObject& layoutObject, const ComputedStyle& style, LayoutSVGResourceMode resourceMode)
{
    ASSERT(resourceMode == ApplyToFillMode || resourceMode == ApplyToStrokeMode);

    SVGPaintDescription paintDescription = requestPaint(layoutObject, style, resourceMode);
    if (!paintDescription.isValid)
        return invalid();
    if (!paintDescription.resource)
        return SVGPaintServer(paintDescription.color);
    SVGPaintServer paintServer = paintDescription.resource->preparePaintServer(layoutObject);
    if (paintServer.isValid())
        return paintServer;
    if (paintDescription.hasFallback)
        return SVGPaintServer(paintDescription.color);
    return invalid();
}
Exemplo n.º 3
0
SVGPaintServer LayoutSVGResourceGradient::preparePaintServer(
    const LayoutObject& object) {
  clearInvalidationMask();

  // Be sure to synchronize all SVG properties on the gradientElement _before_
  // processing any further. Otherwhise the call to collectGradientAttributes()
  // in createTileImage(), may cause the SVG DOM property synchronization to
  // kick in, which causes removeAllClientsFromCache() to be called, which in
  // turn deletes our GradientData object! Leaving out the line below will cause
  // svg/dynamic-updates/SVG*GradientElement-svgdom* to crash.
  SVGGradientElement* gradientElement = toSVGGradientElement(element());
  if (!gradientElement)
    return SVGPaintServer::invalid();

  if (m_shouldCollectGradientAttributes) {
    gradientElement->synchronizeAnimatedSVGAttribute(anyQName());
    if (!collectGradientAttributes(gradientElement))
      return SVGPaintServer::invalid();

    m_shouldCollectGradientAttributes = false;
  }

  // Spec: When the geometry of the applicable element has no width or height
  // and objectBoundingBox is specified, then the given effect (e.g. a gradient
  // or a filter) will be ignored.
  FloatRect objectBoundingBox = object.objectBoundingBox();
  if (gradientUnits() == SVGUnitTypes::kSvgUnitTypeObjectboundingbox &&
      objectBoundingBox.isEmpty())
    return SVGPaintServer::invalid();

  std::unique_ptr<GradientData>& gradientData =
      m_gradientMap.add(&object, nullptr).storedValue->value;
  if (!gradientData)
    gradientData = WTF::wrapUnique(new GradientData);

  // Create gradient object
  if (!gradientData->gradient) {
    gradientData->gradient = buildGradient();

    // We want the text bounding box applied to the gradient space transform
    // now, so the gradient shader can use it.
    if (gradientUnits() == SVGUnitTypes::kSvgUnitTypeObjectboundingbox &&
        !objectBoundingBox.isEmpty()) {
      gradientData->userspaceTransform.translate(objectBoundingBox.x(),
                                                 objectBoundingBox.y());
      gradientData->userspaceTransform.scaleNonUniform(
          objectBoundingBox.width(), objectBoundingBox.height());
    }

    AffineTransform gradientTransform = calculateGradientTransform();
    gradientData->userspaceTransform *= gradientTransform;
  }

  if (!gradientData->gradient)
    return SVGPaintServer::invalid();

  return SVGPaintServer(gradientData->gradient,
                        gradientData->userspaceTransform);
}