FloatRect RenderSVGResourcePattern::calculatePatternBoundariesIncludingOverflow(PatternAttributes& attributes,
                                                                                const FloatRect& objectBoundingBox,
                                                                                const AffineTransform& viewBoxCTM,
                                                                                const FloatRect& patternBoundaries) const
{
    // Eventually calculate the pattern content boundaries (only needed with overflow="visible").
    FloatRect patternContentBoundaries;

    const RenderStyle* style = this->style();
    if (style->overflowX() == OVISIBLE && style->overflowY() == OVISIBLE) {
        for (Node* node = attributes.patternContentElement()->firstChild(); node; node = node->nextSibling()) {
            if (!node->isSVGElement() || !static_cast<SVGElement*>(node)->isStyledTransformable() || !node->renderer())
                continue;
            patternContentBoundaries.unite(node->renderer()->repaintRectInLocalCoordinates());
        }
    }

    if (patternContentBoundaries.isEmpty())
        return patternBoundaries;

    FloatRect patternBoundariesIncludingOverflow = patternBoundaries;

    // Respect objectBoundingBoxMode for patternContentUnits, if viewBox is not set.
    if (!viewBoxCTM.isIdentity())
        patternContentBoundaries = viewBoxCTM.mapRect(patternContentBoundaries);
    else if (attributes.boundingBoxModeContent())
        patternContentBoundaries = FloatRect(patternContentBoundaries.x() * objectBoundingBox.width(),
                                             patternContentBoundaries.y() * objectBoundingBox.height(),
                                             patternContentBoundaries.width() * objectBoundingBox.width(),
                                             patternContentBoundaries.height() * objectBoundingBox.height());

    patternBoundariesIncludingOverflow.unite(patternContentBoundaries);
    return patternBoundariesIncludingOverflow;
}
PassOwnPtr<ImageBuffer> RenderSVGResourcePattern::createTileImage(RenderObject* object,
                                                                  const PatternAttributes& attributes,
                                                                  const FloatRect& tileBoundaries,
                                                                  const FloatRect& absoluteTileBoundaries,
                                                                  const AffineTransform& tileImageTransform) const
{
    ASSERT(object);

    // Clamp tile image size against SVG viewport size, as last resort, to avoid allocating huge image buffers.
    FloatRect contentBoxRect = SVGRenderSupport::findTreeRootObject(object)->contentBoxRect();

    FloatRect clampedAbsoluteTileBoundaries = absoluteTileBoundaries;
    if (clampedAbsoluteTileBoundaries.width() > contentBoxRect.width())
        clampedAbsoluteTileBoundaries.setWidth(contentBoxRect.width());

    if (clampedAbsoluteTileBoundaries.height() > contentBoxRect.height())
        clampedAbsoluteTileBoundaries.setHeight(contentBoxRect.height());

    OwnPtr<ImageBuffer> tileImage;

    if (!SVGImageBufferTools::createImageBuffer(absoluteTileBoundaries, clampedAbsoluteTileBoundaries, tileImage, ColorSpaceDeviceRGB))
        return PassOwnPtr<ImageBuffer>();

    GraphicsContext* tileImageContext = tileImage->context();
    ASSERT(tileImageContext);

    // The image buffer represents the final rendered size, so the content has to be scaled (to avoid pixelation).
    tileImageContext->scale(FloatSize(absoluteTileBoundaries.width() / tileBoundaries.width(),
                                      absoluteTileBoundaries.height() / tileBoundaries.height()));

    // Apply tile image transformations.
    if (!tileImageTransform.isIdentity())
        tileImageContext->concatCTM(tileImageTransform);

    AffineTransform contentTransformation;
    if (attributes.boundingBoxModeContent())
        contentTransformation = tileImageTransform;

    // Draw the content into the ImageBuffer.
    for (Node* node = attributes.patternContentElement()->firstChild(); node; node = node->nextSibling()) {
        if (!node->isSVGElement() || !static_cast<SVGElement*>(node)->isStyled() || !node->renderer())
            continue;
        SVGImageBufferTools::renderSubtreeToImageBuffer(tileImage.get(), node->renderer(), contentTransformation);
    }

    return tileImage.release();
}
PassOwnPtr<ImageBuffer> RenderSVGResourcePattern::createTileImage(const PatternAttributes& attributes,
                                                                  const FloatRect& tileBoundaries,
                                                                  const FloatRect& absoluteTileBoundaries,
                                                                  const AffineTransform& tileImageTransform,
                                                                  FloatRect& clampedAbsoluteTileBoundaries) const
{
    clampedAbsoluteTileBoundaries = SVGImageBufferTools::clampedAbsoluteTargetRect(absoluteTileBoundaries);

    OwnPtr<ImageBuffer> tileImage;

    if (!SVGImageBufferTools::createImageBuffer(absoluteTileBoundaries, clampedAbsoluteTileBoundaries, tileImage, ColorSpaceDeviceRGB))
        return nullptr;

    GraphicsContext* tileImageContext = tileImage->context();
    ASSERT(tileImageContext);

    // The image buffer represents the final rendered size, so the content has to be scaled (to avoid pixelation).
    tileImageContext->scale(FloatSize(clampedAbsoluteTileBoundaries.width() / tileBoundaries.width(),
                                      clampedAbsoluteTileBoundaries.height() / tileBoundaries.height()));

    // Apply tile image transformations.
    if (!tileImageTransform.isIdentity())
        tileImageContext->concatCTM(tileImageTransform);

    AffineTransform contentTransformation;
    if (attributes.boundingBoxModeContent())
        contentTransformation = tileImageTransform;

    // Draw the content into the ImageBuffer.
    for (Node* node = attributes.patternContentElement()->firstChild(); node; node = node->nextSibling()) {
        if (!node->isSVGElement() || !static_cast<SVGElement*>(node)->isStyled() || !node->renderer())
            continue;
        SVGImageBufferTools::renderSubtreeToImageBuffer(tileImage.get(), node->renderer(), contentTransformation);
    }

    return tileImage.release();
}
bool RenderSVGResourcePattern::buildTileImageTransform(RenderObject* renderer,
                                                       const PatternAttributes& attributes,
                                                       const SVGPatternElement* patternElement,
                                                       FloatRect& patternBoundaries,
                                                       AffineTransform& tileImageTransform) const
{
    ASSERT(renderer);
    ASSERT(patternElement);

    FloatRect objectBoundingBox = renderer->objectBoundingBox();
    patternBoundaries = calculatePatternBoundaries(attributes, objectBoundingBox, patternElement); 
    if (patternBoundaries.width() <= 0 || patternBoundaries.height() <= 0)
        return false;

    AffineTransform viewBoxCTM = patternElement->viewBoxToViewTransform(attributes.viewBox(), attributes.preserveAspectRatio(), patternBoundaries.width(), patternBoundaries.height());

    // Apply viewBox/objectBoundingBox transformations.
    if (!viewBoxCTM.isIdentity())
        tileImageTransform = viewBoxCTM;
    else if (attributes.boundingBoxModeContent())
        tileImageTransform.scale(objectBoundingBox.width(), objectBoundingBox.height());

    return true;
}
PassOwnPtr<ImageBuffer> RenderSVGResourcePattern::createTileImage(PatternData* patternData,
                                                                  const SVGPatternElement* patternElement,
                                                                  RenderObject* object) const
{
    PatternAttributes attributes = patternElement->collectPatternProperties();

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

    FloatRect objectBoundingBox = object->objectBoundingBox();    
    FloatRect patternBoundaries = calculatePatternBoundaries(attributes, objectBoundingBox, patternElement); 
    AffineTransform patternTransform = attributes.patternTransform();

    AffineTransform viewBoxCTM = patternElement->viewBoxToViewTransform(patternElement->viewBox(),
                                                                        patternElement->preserveAspectRatio(),
                                                                        patternBoundaries.width(),
                                                                        patternBoundaries.height());

    FloatRect patternBoundariesIncludingOverflow = calculatePatternBoundariesIncludingOverflow(attributes,
                                                                                               objectBoundingBox,
                                                                                               viewBoxCTM,
                                                                                               patternBoundaries);

    IntSize imageSize(lroundf(patternBoundariesIncludingOverflow.width()), lroundf(patternBoundariesIncludingOverflow.height()));

    // FIXME: We should be able to clip this more, needs investigation
    clampImageBufferSizeToViewport(object->document()->view(), imageSize);

    // Don't create ImageBuffers with image size of 0
    if (imageSize.isEmpty())
        return 0;

    OwnPtr<ImageBuffer> tileImage = ImageBuffer::create(imageSize);

    GraphicsContext* context = tileImage->context();
    ASSERT(context);

    context->save();

    // Translate to pattern start origin
    if (patternBoundariesIncludingOverflow.location() != patternBoundaries.location()) {
        context->translate(patternBoundaries.x() - patternBoundariesIncludingOverflow.x(),
                           patternBoundaries.y() - patternBoundariesIncludingOverflow.y());

        patternBoundaries.setLocation(patternBoundariesIncludingOverflow.location());
    }

    // Process viewBox or boundingBoxModeContent correction
    if (!viewBoxCTM.isIdentity())
        context->concatCTM(viewBoxCTM);
    else if (attributes.boundingBoxModeContent()) {
        context->translate(objectBoundingBox.x(), objectBoundingBox.y());
        context->scale(FloatSize(objectBoundingBox.width(), objectBoundingBox.height()));
    }

    // Render subtree into ImageBuffer
    for (Node* node = attributes.patternContentElement()->firstChild(); node; node = node->nextSibling()) {
        if (!node->isSVGElement() || !static_cast<SVGElement*>(node)->isStyled() || !node->renderer())
            continue;
        renderSubtreeToImage(tileImage.get(), node->renderer());
    }

    patternData->boundaries = patternBoundaries;

    // Compute pattern transformation
    patternData->transform.translate(patternBoundaries.x(), patternBoundaries.y());
    patternData->transform.multiply(patternTransform);

    context->restore();
    return tileImage.release();
}
예제 #6
0
void writeSVGResourceContainer(TextStream& ts, const RenderObject& object, int indent)
{
    writeStandardPrefix(ts, object, indent);

    Element* element = static_cast<Element*>(object.node());
    const AtomicString& id = element->getIdAttribute();
    writeNameAndQuotedValue(ts, "id", id);    

    RenderSVGResourceContainer* resource = const_cast<RenderObject&>(object).toRenderSVGResourceContainer();
    ASSERT(resource);

    if (resource->resourceType() == MaskerResourceType) {
        RenderSVGResourceMasker* masker = static_cast<RenderSVGResourceMasker*>(resource);
        writeNameValuePair(ts, "maskUnits", masker->maskUnits());
        writeNameValuePair(ts, "maskContentUnits", masker->maskContentUnits());
        ts << "\n";
#if ENABLE(FILTERS)
    } else if (resource->resourceType() == FilterResourceType) {
        RenderSVGResourceFilter* filter = static_cast<RenderSVGResourceFilter*>(resource);
        writeNameValuePair(ts, "filterUnits", filter->filterUnits());
        writeNameValuePair(ts, "primitiveUnits", filter->primitiveUnits());
        ts << "\n";
        if (RefPtr<SVGFilterBuilder> builder = filter->buildPrimitives()) {
            if (FilterEffect* lastEffect = builder->lastEffect())
                lastEffect->externalRepresentation(ts, indent + 1);
        }      
#endif
    } else if (resource->resourceType() == ClipperResourceType) {
        RenderSVGResourceClipper* clipper = static_cast<RenderSVGResourceClipper*>(resource);
        writeNameValuePair(ts, "clipPathUnits", clipper->clipPathUnits());
        ts << "\n";
    } else if (resource->resourceType() == MarkerResourceType) {
        RenderSVGResourceMarker* marker = static_cast<RenderSVGResourceMarker*>(resource);
        writeNameValuePair(ts, "markerUnits", marker->markerUnits());
        ts << " [ref at " << marker->referencePoint() << "]";
        ts << " [angle=";
        if (marker->angle() == -1)
            ts << "auto" << "]\n";
        else
            ts << marker->angle() << "]\n";
    } else if (resource->resourceType() == PatternResourceType) {
        RenderSVGResourcePattern* pattern = static_cast<RenderSVGResourcePattern*>(resource);

        // Dump final results that are used for rendering. No use in asking SVGPatternElement for its patternUnits(), as it may
        // link to other patterns using xlink:href, we need to build the full inheritance chain, aka. collectPatternProperties()
        PatternAttributes attributes = static_cast<SVGPatternElement*>(pattern->node())->collectPatternProperties();
        writeNameValuePair(ts, "patternUnits", boundingBoxModeString(attributes.boundingBoxMode()));
        writeNameValuePair(ts, "patternContentUnits", boundingBoxModeString(attributes.boundingBoxModeContent()));

        AffineTransform transform = attributes.patternTransform();
        if (!transform.isIdentity())
            ts << " [patternTransform=" << transform << "]";
        ts << "\n";
    } else if (resource->resourceType() == LinearGradientResourceType) {
        RenderSVGResourceLinearGradient* gradient = static_cast<RenderSVGResourceLinearGradient*>(resource);

        // Dump final results that are used for rendering. No use in asking SVGGradientElement for its gradientUnits(), as it may
        // link to other gradients using xlink:href, we need to build the full inheritance chain, aka. collectGradientProperties()
        SVGLinearGradientElement* linearGradientElement = static_cast<SVGLinearGradientElement*>(gradient->node());

        LinearGradientAttributes attributes = linearGradientElement->collectGradientProperties();
        writeCommonGradientProperties(ts, attributes.spreadMethod(), attributes.gradientTransform(), attributes.boundingBoxMode());

        FloatPoint startPoint;
        FloatPoint endPoint;
        linearGradientElement->calculateStartEndPoints(attributes, startPoint, endPoint);

        ts << " [start=" << startPoint << "] [end=" << endPoint << "]\n";
    }  else if (resource->resourceType() == RadialGradientResourceType) {
        RenderSVGResourceRadialGradient* gradient = static_cast<RenderSVGResourceRadialGradient*>(resource);

        // Dump final results that are used for rendering. No use in asking SVGGradientElement for its gradientUnits(), as it may
        // link to other gradients using xlink:href, we need to build the full inheritance chain, aka. collectGradientProperties()
        SVGRadialGradientElement* radialGradientElement = static_cast<SVGRadialGradientElement*>(gradient->node());

        RadialGradientAttributes attributes = radialGradientElement->collectGradientProperties();
        writeCommonGradientProperties(ts, attributes.spreadMethod(), attributes.gradientTransform(), attributes.boundingBoxMode());

        FloatPoint focalPoint;
        FloatPoint centerPoint;
        float radius;
        radialGradientElement->calculateFocalCenterPointsAndRadius(attributes, focalPoint, centerPoint, radius);

        ts << " [center=" << centerPoint << "] [focal=" << focalPoint << "] [radius=" << radius << "]\n";
    } else
        ts << "\n";
    writeChildren(ts, object, indent);
}