C++ SVGPatternElement类代码示例

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);
}

JSValue jsSVGPatternElementClassName(ExecState* exec, const Identifier&, const PropertySlot& slot)
{
    UNUSED_PARAM(exec);
    SVGPatternElement* imp = static_cast<SVGPatternElement*>(static_cast<JSSVGPatternElement*>(asObject(slot.slotBase()))->impl());
    RefPtr<SVGAnimatedString> obj = imp->classNameAnimated();
    return toJS(exec, obj.get(), imp);
}

JSValue jsSVGPatternElementPreserveAspectRatio(ExecState* exec, const Identifier&, const PropertySlot& slot)
{
    UNUSED_PARAM(exec);
    SVGPatternElement* imp = static_cast<SVGPatternElement*>(static_cast<JSSVGPatternElement*>(asObject(slot.slotBase()))->impl());
    RefPtr<SVGAnimatedPreserveAspectRatio> obj = imp->preserveAspectRatioAnimated();
    return toJS(exec, obj.get(), imp);
}

JSValue jsSVGPatternElementExternalResourcesRequired(ExecState* exec, const Identifier&, const PropertySlot& slot)
{
    UNUSED_PARAM(exec);
    SVGPatternElement* imp = static_cast<SVGPatternElement*>(static_cast<JSSVGPatternElement*>(asObject(slot.slotBase()))->impl());
    RefPtr<SVGAnimatedBoolean> obj = imp->externalResourcesRequiredAnimated();
    return toJS(exec, obj.get(), imp);
}

JSValue JSC_HOST_CALL jsSVGPatternElementPrototypeFunctionGetPresentationAttribute(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
{
    UNUSED_PARAM(args);
    if (!thisValue.isObject(&JSSVGPatternElement::s_info))
        return throwError(exec, TypeError);
    JSSVGPatternElement* castedThisObj = static_cast<JSSVGPatternElement*>(asObject(thisValue));
    SVGPatternElement* imp = static_cast<SVGPatternElement*>(castedThisObj->impl());
    const UString& name = args.at(0).toString(exec);


    JSC::JSValue result = toJS(exec, WTF::getPtr(imp->getPresentationAttribute(name)));
    return result;
}

JSValue JSC_HOST_CALL jsSVGPatternElementPrototypeFunctionHasExtension(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
{
    UNUSED_PARAM(args);
    if (!thisValue.isObject(&JSSVGPatternElement::s_info))
        return throwError(exec, TypeError);
    JSSVGPatternElement* castedThisObj = static_cast<JSSVGPatternElement*>(asObject(thisValue));
    SVGPatternElement* imp = static_cast<SVGPatternElement*>(castedThisObj->impl());
    const UString& extension = args.at(0).toString(exec);


    JSC::JSValue result = jsBoolean(imp->hasExtension(extension));
    return result;
}

void JSSVGPatternElement::putValueProperty(ExecState* exec, int token, JSValue* value, int /*attr*/)
{
    switch (token) {
    case XmllangAttrNum: {
        SVGPatternElement* imp = static_cast<SVGPatternElement*>(impl());

        imp->setXmllang(value->toString(exec));
        break;
    }
    case XmlspaceAttrNum: {
        SVGPatternElement* imp = static_cast<SVGPatternElement*>(impl());

        imp->setXmlspace(value->toString(exec));
        break;
    }
    }
}

JSValue* JSSVGPatternElementPrototypeFunction::callAsFunction(ExecState* exec, JSObject* thisObj, const List& args)
{
    if (!thisObj->inherits(&JSSVGPatternElement::info))
        return throwError(exec, TypeError);

    SVGPatternElement* imp = static_cast<SVGPatternElement*>(static_cast<JSSVGPatternElement*>(thisObj)->impl());

    switch (id) {
    case JSSVGPatternElement::HasExtensionFuncNum: {
        String extension = args[0]->toString(exec);


        KJS::JSValue* result = jsBoolean(imp->hasExtension(extension));
        return result;
    }
    }
    return 0;
}

bool RenderSVGResourcePattern::applyResource(RenderObject* object, RenderStyle* style, GraphicsContext*& context, unsigned short resourceMode)
{
    ASSERT(object);
    ASSERT(style);
    ASSERT(context);
    ASSERT(resourceMode != ApplyToDefaultMode);

    // Be sure to synchronize all SVG properties on the patternElement _before_ processing any further.
    // Otherwhise the call to collectPatternAttributes() below, may cause the SVG DOM property
    // synchronization to kick in, which causes removeAllClientsFromCache() to be called, which in turn deletes our
    // PatternData object! Leaving out the line below will cause svg/dynamic-updates/SVGPatternElement-svgdom* to crash.
    SVGPatternElement* patternElement = static_cast<SVGPatternElement*>(node());
    if (!patternElement)
        return false;

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

        m_attributes = PatternAttributes();
        patternElement->collectPatternAttributes(m_attributes);
        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 (m_attributes.patternUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX && objectBoundingBox.isEmpty())
        return false;

    OwnPtr<PatternData>& patternData = m_patternMap.add(object, nullptr).iterator->second;
    if (!patternData)
        patternData = adoptPtr(new PatternData);

    if (!patternData->pattern) {
        // If we couldn't determine the pattern content element root, stop here.
        if (!m_attributes.patternContentElement())
            return false;

        // Compute all necessary transformations to build the tile image & the pattern.
        FloatRect tileBoundaries;
        AffineTransform tileImageTransform;
        if (!buildTileImageTransform(object, m_attributes, patternElement, tileBoundaries, tileImageTransform))
            return false;

        AffineTransform absoluteTransformIgnoringRotation;
        SVGRenderingContext::calculateTransformationToOutermostSVGCoordinateSystem(object, absoluteTransformIgnoringRotation);

        // Ignore 2D rotation, as it doesn't affect the size of the tile.
        SVGRenderingContext::clear2DRotation(absoluteTransformIgnoringRotation);
        FloatRect absoluteTileBoundaries = absoluteTransformIgnoringRotation.mapRect(tileBoundaries);
        FloatRect clampedAbsoluteTileBoundaries;

        // Scale the tile size to match the scale level of the patternTransform.
        absoluteTileBoundaries.scale(static_cast<float>(m_attributes.patternTransform().xScale()),
            static_cast<float>(m_attributes.patternTransform().yScale()));

        // Build tile image.
        OwnPtr<ImageBuffer> tileImage = createTileImage(m_attributes, tileBoundaries, absoluteTileBoundaries, tileImageTransform, clampedAbsoluteTileBoundaries);
        if (!tileImage)
            return false;

        RefPtr<Image> copiedImage = tileImage->copyImage(CopyBackingStore);
        if (!copiedImage)
            return false;

        // Build pattern.
        patternData->pattern = Pattern::create(copiedImage, true, true);
        if (!patternData->pattern)
            return false;

        // Compute pattern space transformation.
        patternData->transform.translate(tileBoundaries.x(), tileBoundaries.y());
        patternData->transform.scale(tileBoundaries.width() / clampedAbsoluteTileBoundaries.width(), tileBoundaries.height() / clampedAbsoluteTileBoundaries.height());

        AffineTransform patternTransform = m_attributes.patternTransform();
        if (!patternTransform.isIdentity())
            patternData->transform = patternTransform * patternData->transform;

        // Account for text drawing resetting the context to non-scaled, see SVGInlineTextBox::paintTextWithShadows.
        if (resourceMode & ApplyToTextMode) {
            AffineTransform additionalTextTransformation;
            if (shouldTransformOnTextPainting(object, additionalTextTransformation))
                patternData->transform *= additionalTextTransformation;
        }
        patternData->pattern->setPatternSpaceTransform(patternData->transform);
    }

    // Draw pattern
    context->save();

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

    if (resourceMode & ApplyToFillMode) {
        context->setAlpha(svgStyle->fillOpacity());
        context->setFillPattern(patternData->pattern);
        context->setFillRule(svgStyle->fillRule());
    } else if (resourceMode & ApplyToStrokeMode) {
        if (svgStyle->vectorEffect() == VE_NON_SCALING_STROKE)
            patternData->pattern->setPatternSpaceTransform(transformOnNonScalingStroke(object, patternData->transform));
//.........这里部分代码省略.........

PatternData* RenderSVGResourcePattern::buildPattern(RenderObject* object, unsigned short resourceMode)
{
    PatternData* currentData = m_patternMap.get(object);
    if (currentData && currentData->pattern)
        return currentData;

    SVGPatternElement* patternElement = static_cast<SVGPatternElement*>(node());
    if (!patternElement)
        return 0;

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

        m_attributes = PatternAttributes();
        patternElement->collectPatternAttributes(m_attributes);
        m_shouldCollectPatternAttributes = false;
    }

    // If we couldn't determine the pattern content element root, stop here.
    if (!m_attributes.patternContentElement())
        return 0;

    // Compute all necessary transformations to build the tile image & the pattern.
    FloatRect tileBoundaries;
    AffineTransform tileImageTransform;
    if (!buildTileImageTransform(object, m_attributes, patternElement, tileBoundaries, tileImageTransform))
        return 0;

    AffineTransform absoluteTransformIgnoringRotation;
    SVGRenderingContext::calculateTransformationToOutermostSVGCoordinateSystem(object, absoluteTransformIgnoringRotation);

    // Ignore 2D rotation, as it doesn't affect the size of the tile.
    SVGRenderingContext::clear2DRotation(absoluteTransformIgnoringRotation);
    FloatRect absoluteTileBoundaries = absoluteTransformIgnoringRotation.mapRect(tileBoundaries);
    FloatRect clampedAbsoluteTileBoundaries;

    // Scale the tile size to match the scale level of the patternTransform.
    absoluteTileBoundaries.scale(static_cast<float>(m_attributes.patternTransform().xScale()),
        static_cast<float>(m_attributes.patternTransform().yScale()));

    // Build tile image.
    OwnPtr<ImageBuffer> tileImage = createTileImage(m_attributes, tileBoundaries, absoluteTileBoundaries, tileImageTransform, clampedAbsoluteTileBoundaries);
    if (!tileImage)
        return 0;

    RefPtr<Image> copiedImage = tileImage->copyImage(CopyBackingStore);
    if (!copiedImage)
        return 0;

    // Build pattern.
    OwnPtr<PatternData> patternData = adoptPtr(new PatternData);
    patternData->pattern = Pattern::create(copiedImage, true, true);

    // Compute pattern space transformation.
    const IntSize tileImageSize = tileImage->logicalSize();
    patternData->transform.translate(tileBoundaries.x(), tileBoundaries.y());
    patternData->transform.scale(tileBoundaries.width() / tileImageSize.width(), tileBoundaries.height() / tileImageSize.height());

    AffineTransform patternTransform = m_attributes.patternTransform();
    if (!patternTransform.isIdentity())
        patternData->transform = patternTransform * patternData->transform;

    // Account for text drawing resetting the context to non-scaled, see SVGInlineTextBox::paintTextWithShadows.
    if (resourceMode & ApplyToTextMode) {
        AffineTransform additionalTextTransformation;
        if (shouldTransformOnTextPainting(object, additionalTextTransformation))
            patternData->transform *= additionalTextTransformation;
    }
    patternData->pattern->setPatternSpaceTransform(patternData->transform);

    // Various calls above may trigger invalidations in some fringe cases (ImageBuffer allocation
    // failures in the SVG image cache for example). To avoid having our PatternData deleted by
    // removeAllClientsFromCache(), we only make it visible in the cache at the very end.
    return m_patternMap.set(object, patternData.release()).iterator->value.get();
}

void setJSSVGPatternElementXmlspace(ExecState* exec, JSObject* thisObject, JSValue value)
{
    SVGPatternElement* imp = static_cast<SVGPatternElement*>(static_cast<JSSVGPatternElement*>(thisObject)->impl());
    imp->setXmlspace(value.toString(exec));
}

JSValue jsSVGPatternElementStyle(ExecState* exec, const Identifier&, const PropertySlot& slot)
{
    UNUSED_PARAM(exec);
    SVGPatternElement* imp = static_cast<SVGPatternElement*>(static_cast<JSSVGPatternElement*>(asObject(slot.slotBase()))->impl());
    return toJS(exec, WTF::getPtr(imp->style()));
}

JSValue jsSVGPatternElementXmlspace(ExecState* exec, const Identifier&, const PropertySlot& slot)
{
    UNUSED_PARAM(exec);
    SVGPatternElement* imp = static_cast<SVGPatternElement*>(static_cast<JSSVGPatternElement*>(asObject(slot.slotBase()))->impl());
    return jsString(exec, imp->xmlspace());
}

static void setPatternAttributes(const SVGPatternElement& element, PatternAttributes& attributes)
{
    if (!attributes.hasX() && element.hasAttribute(SVGNames::xAttr))
        attributes.setX(element.x());

    if (!attributes.hasY() && element.hasAttribute(SVGNames::yAttr))
        attributes.setY(element.y());

    if (!attributes.hasWidth() && element.hasAttribute(SVGNames::widthAttr))
        attributes.setWidth(element.width());

    if (!attributes.hasHeight() && element.hasAttribute(SVGNames::heightAttr))
        attributes.setHeight(element.height());

    if (!attributes.hasViewBox() && element.hasAttribute(SVGNames::viewBoxAttr) && element.viewBoxIsValid())
        attributes.setViewBox(element.viewBox());

    if (!attributes.hasPreserveAspectRatio() && element.hasAttribute(SVGNames::preserveAspectRatioAttr))
        attributes.setPreserveAspectRatio(element.preserveAspectRatio());

    if (!attributes.hasPatternUnits() && element.hasAttribute(SVGNames::patternUnitsAttr))
        attributes.setPatternUnits(element.patternUnits());

    if (!attributes.hasPatternContentUnits() && element.hasAttribute(SVGNames::patternContentUnitsAttr))
        attributes.setPatternContentUnits(element.patternContentUnits());

    if (!attributes.hasPatternTransform() && element.hasAttribute(SVGNames::patternTransformAttr)) {
        AffineTransform transform;
        element.patternTransform().concatenate(transform);
        attributes.setPatternTransform(transform);
    }

    if (!attributes.hasPatternContentElement() && element.childElementCount())
        attributes.setPatternContentElement(&element);
}

bool RenderSVGResourcePattern::applyResource(RenderObject* object, RenderStyle* style, GraphicsContext*& context, unsigned short resourceMode)
{
    ASSERT(object);
    ASSERT(style);
    ASSERT(context);
    ASSERT(resourceMode != ApplyToDefaultMode);

    // Be sure to synchronize all SVG properties on the patternElement _before_ processing any further.
    // Otherwhise the call to collectPatternAttributes() below, may cause the SVG DOM property
    // synchronization to kick in, which causes removeAllClientsFromCache() to be called, which in turn deletes our
    // PatternData object! Leaving out the line below will cause svg/dynamic-updates/SVGPatternElement-svgdom* to crash.
    SVGPatternElement* patternElement = static_cast<SVGPatternElement*>(node());
    if (!patternElement)
        return false;

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

        m_attributes = PatternAttributes();
        patternElement->collectPatternAttributes(m_attributes);
        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 (m_attributes.boundingBoxMode() && objectBoundingBox.isEmpty())
        return false;

    if (!m_pattern.contains(object))
        m_pattern.set(object, new PatternData);

    PatternData* patternData = m_pattern.get(object);
    if (!patternData->pattern) {
        // If we couldn't determine the pattern content element root, stop here.
        if (!m_attributes.patternContentElement())
            return false;

        // Compute all necessary transformations to build the tile image & the pattern.
        FloatRect tileBoundaries;
        AffineTransform tileImageTransform;
        if (!buildTileImageTransform(object, m_attributes, patternElement, tileBoundaries, tileImageTransform))
            return false;

        AffineTransform absoluteTransform;
        SVGImageBufferTools::calculateTransformationToOutermostSVGCoordinateSystem(object, absoluteTransform);

        FloatRect absoluteTileBoundaries = absoluteTransform.mapRect(tileBoundaries);

        // Build tile image.
        OwnPtr<ImageBuffer> tileImage = createTileImage(object, m_attributes, tileBoundaries, absoluteTileBoundaries, tileImageTransform);
        if (!tileImage)
            return false;

        RefPtr<Image> copiedImage = tileImage->copyImage();
        if (!copiedImage)
            return false;

        // Build pattern.
        patternData->pattern = Pattern::create(copiedImage, true, true);
        if (!patternData->pattern)
            return false;

        // Compute pattern space transformation.
        patternData->transform.translate(tileBoundaries.x(), tileBoundaries.y());
        patternData->transform.scale(tileBoundaries.width() / absoluteTileBoundaries.width(), tileBoundaries.height() / absoluteTileBoundaries.height());

        AffineTransform patternTransform = m_attributes.patternTransform();
        if (!patternTransform.isIdentity())
            patternData->transform = patternTransform * patternData->transform;

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

    // Draw pattern
    context->save();

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

    if (resourceMode & ApplyToFillMode) {
        context->setAlpha(svgStyle->fillOpacity());
        context->setFillPattern(patternData->pattern);
        context->setFillRule(svgStyle->fillRule());
    } else if (resourceMode & ApplyToStrokeMode) {
        if (svgStyle->vectorEffect() == VE_NON_SCALING_STROKE)
            patternData->pattern->setPatternSpaceTransform(transformOnNonScalingStroke(object, patternData->transform));
        context->setAlpha(svgStyle->strokeOpacity());
        context->setStrokePattern(patternData->pattern);
        SVGRenderSupport::applyStrokeStyleToContext(context, style, object);
    }

    if (resourceMode & ApplyToTextMode) {
        if (resourceMode & ApplyToFillMode) {
            context->setTextDrawingMode(TextModeFill);

#if PLATFORM(CG)
            context->applyFillPattern();
#endif
        } else if (resourceMode & ApplyToStrokeMode) {
//.........这里部分代码省略.........