import org.apache.batik.dom.svg.SVGOMDocument; //导入依赖的package包/类
/**
 * Call before querying for CSS properties. If document has CSS engine installed returns null. Client is responsible to dispose bridge context if it was
 * returned by this method.
 */
public BridgeContext initCSSEngine() {
  if (this.document == null) {
    return null;
  }
  SVGOMDocument sd = (SVGOMDocument) this.document;
  if (sd.getCSSEngine() != null) {
    return null;
  }
  class BridgeContextEx extends BridgeContext {

    public BridgeContextEx() {
      super(SimpleImageTranscoder.this.userAgent);
      BridgeContextEx.this.setDocument(SimpleImageTranscoder.this.document);
      BridgeContextEx.this.initializeDocument(SimpleImageTranscoder.this.document);
    }
  }
  return new BridgeContextEx();
}
 

import org.apache.batik.dom.svg.SVGOMDocument; //导入依赖的package包/类
/**
 * Call before querying for CSS properties. If document has CSS engine installed returns null. Client is responsible to
 * dispose bridge context if it was returned by this method.
 */
public BridgeContext initCSSEngine() {
	if (this.document == null) {
		return null;
	}
	SVGOMDocument sd = (SVGOMDocument) this.document;
	if (sd.getCSSEngine() != null) {
		return null;
	}
	class BridgeContextEx extends BridgeContext {

		public BridgeContextEx() {
			super(SimpleImageTranscoder.this.userAgent);
			BridgeContextEx.this.setDocument(SimpleImageTranscoder.this.document);
			BridgeContextEx.this.initializeDocument(SimpleImageTranscoder.this.document);
		}
	}
	return new BridgeContextEx();
}
 

import org.apache.batik.dom.svg.SVGOMDocument; //导入依赖的package包/类
/** {@inheritDoc} */
@Override
public BridgeContext createBridgeContext(SVGOMDocument doc) {
    // Make sure any 'sub bridge contexts' also have our bridges.
    return new PDFBridgeContext(getUserAgent(), getDocumentLoader(),
                                fontInfo,
                                getImageManager(),
                                getImageSessionContext(),
                                linkTransform);
}
 

import org.apache.batik.dom.svg.SVGOMDocument; //导入依赖的package包/类
private ImageInfo createImageInfo(String uri, ImageContext context, SVGDocument doc) {
    Element e = doc.getRootElement();
    float pxUnitToMillimeter = UnitConv.IN2MM / context.getSourceResolution();
    UserAgent userAg = new SimpleSVGUserAgent(pxUnitToMillimeter,
                new AffineTransform()) {

        /** {@inheritDoc} */
        public void displayMessage(String message) {
            log.debug(message);
        }

    };
    BridgeContext ctx = new BridgeContext(userAg);
    UnitProcessor.Context uctx = UnitProcessor.createContext(ctx, e);

    String s;
    // 'width' attribute - default is 100%
    s = e.getAttributeNS(null, SVGOMDocument.SVG_WIDTH_ATTRIBUTE);
    if (s.length() == 0) {
        s = SVGOMDocument.SVG_SVG_WIDTH_DEFAULT_VALUE;
    }
    float width = UnitProcessor.svgHorizontalLengthToUserSpace(
            s, SVGOMDocument.SVG_WIDTH_ATTRIBUTE, uctx);

    // 'height' attribute - default is 100%
    s = e.getAttributeNS(null, SVGOMDocument.SVG_HEIGHT_ATTRIBUTE);
    if (s.length() == 0) {
        s = SVGOMDocument.SVG_SVG_HEIGHT_DEFAULT_VALUE;
    }
    float height = UnitProcessor.svgVerticalLengthToUserSpace(
            s, SVGOMDocument.SVG_HEIGHT_ATTRIBUTE, uctx);

    int widthMpt = (int)Math.round(px2mpt(width, context.getSourceResolution()));
    int heightMpt = (int)Math.round(px2mpt(height, context.getSourceResolution()));

    ImageInfo info = new ImageInfo(uri, MimeConstants.MIME_SVG);
    ImageSize size = new ImageSize();
    size.setSizeInMillipoints(widthMpt, heightMpt);
    //Set the resolution to that of the FOUserAgent
    size.setResolution(context.getSourceResolution());
    size.calcPixelsFromSize();
    info.setSize(size);

    //The whole image had to be loaded for this, so keep it
    ImageXMLDOM xmlImage = new ImageXMLDOM(info,
            doc, BatikImageFlavors.SVG_DOM);
    info.getCustomObjects().put(ImageInfo.ORIGINAL_IMAGE, xmlImage);
    return info;
}
 

import org.apache.batik.dom.svg.SVGOMDocument; //导入依赖的package包/类
/** {@inheritDoc} */
public BridgeContext createBridgeContext(SVGOMDocument doc) {
    return createBridgeContext();
}
 

import org.apache.batik.dom.svg.SVGOMDocument; //导入依赖的package包/类
private static SVGOMDocument createDocument() {
  DOMImplementation impl = SVGDOMImplementation.getDOMImplementation();
  String svgNS = SVGDOMImplementation.SVG_NAMESPACE_URI;
  return (SVGOMDocument) impl.createDocument(svgNS, "svg", null);
}