in fop-core/src/main/java/org/apache/fop/render/pdf/PDFImageHandlerSVG.java [69:229]
public void handleImage(RenderingContext context,
Image image, Rectangle pos)
throws IOException {
PDFRenderingContext pdfContext = (PDFRenderingContext)context;
PDFContentGenerator generator = pdfContext.getGenerator();
ImageXMLDOM imageSVG = (ImageXMLDOM)image;
FOUserAgent userAgent = context.getUserAgent();
final float deviceResolution = userAgent.getTargetResolution();
if (log.isDebugEnabled()) {
log.debug("Generating SVG at " + deviceResolution + "dpi.");
}
final float uaResolution = userAgent.getSourceResolution();
SVGUserAgent ua = new SVGUserAgent(userAgent, new FOPFontFamilyResolverImpl(pdfContext.getFontInfo()),
new AffineTransform());
GVTBuilder builder = new GVTBuilder();
//Controls whether text painted by Batik is generated using text or path operations
boolean strokeText = PSImageHandlerSVG.shouldStrokeText(imageSVG.getDocument().getChildNodes());
//TODO connect with configuration elsewhere.
BridgeContext ctx = new PDFBridgeContext(ua,
(strokeText ? null : pdfContext.getFontInfo()),
userAgent.getImageManager(),
userAgent.getImageSessionContext(),
new AffineTransform());
//Cloning SVG DOM as Batik attaches non-thread-safe facilities (like the CSS engine)
//to it.
Document clonedDoc = BatikUtil.cloneSVGDocument(imageSVG.getDocument());
GraphicsNode root;
try {
root = builder.build(ctx, clonedDoc);
} catch (Exception e) {
SVGEventProducer eventProducer = SVGEventProducer.Provider.get(
context.getUserAgent().getEventBroadcaster());
eventProducer.svgNotBuilt(this, e, image.getInfo().getOriginalURI());
return;
}
// get the 'width' and 'height' attributes of the SVG document
float w = image.getSize().getWidthMpt();
float h = image.getSize().getHeightMpt();
float sx = pos.width / w;
float sy = pos.height / h;
//Scaling and translation for the bounding box of the image
AffineTransform scaling = new AffineTransform(
sx, 0, 0, sy, pos.x / 1000f, pos.y / 1000f);
double sourceScale = UnitConv.IN2PT / uaResolution;
scaling.scale(sourceScale, sourceScale);
//Scale for higher resolution on-the-fly images from Batik
AffineTransform resolutionScaling = new AffineTransform();
double targetScale = uaResolution / deviceResolution;
resolutionScaling.scale(targetScale, targetScale);
resolutionScaling.scale(1.0 / sx, 1.0 / sy);
//Transformation matrix that establishes the local coordinate system for the SVG graphic
//in relation to the current coordinate system
AffineTransform imageTransform = new AffineTransform();
imageTransform.concatenate(scaling);
imageTransform.concatenate(resolutionScaling);
if (log.isTraceEnabled()) {
log.trace("nat size: " + w + "/" + h);
log.trace("req size: " + pos.width + "/" + pos.height);
log.trace("source res: " + uaResolution + ", targetRes: " + deviceResolution
+ " --> target scaling: " + targetScale);
log.trace(image.getSize());
log.trace("sx: " + sx + ", sy: " + sy);
log.trace("scaling: " + scaling);
log.trace("resolution scaling: " + resolutionScaling);
log.trace("image transform: " + resolutionScaling);
}
/*
* Clip to the svg area.
* Note: To have the svg overlay (under) a text area then use
* an fo:block-container
*/
if (log.isTraceEnabled()) {
generator.comment("SVG setup");
}
generator.saveGraphicsState();
if (context.getUserAgent().isAccessibilityEnabled()) {
MarkedContentInfo mci = pdfContext.getMarkedContentInfo();
generator.beginMarkedContentSequence(mci.tag, mci.mcid);
}
generator.updateColor(Color.black, false, null);
generator.updateColor(Color.black, true, null);
if (!scaling.isIdentity()) {
if (log.isTraceEnabled()) {
generator.comment("viewbox");
}
generator.add(CTMHelper.toPDFString(scaling, false) + " cm\n");
}
//SVGSVGElement svg = ((SVGDocument)doc).getRootElement();
PDFGraphics2D graphics = new PDFGraphics2D(true, pdfContext.getFontInfo(),
generator.getDocument(),
generator.getResourceContext(), pdfContext.getPage().makeReference(),
"", 0, new TransparencyIgnoredEventListener(pdfContext, imageSVG));
graphics.setGraphicContext(new org.apache.xmlgraphics.java2d.GraphicContext());
if (!resolutionScaling.isIdentity()) {
if (log.isTraceEnabled()) {
generator.comment("resolution scaling for " + uaResolution
+ " -> " + deviceResolution);
}
generator.add(
CTMHelper.toPDFString(resolutionScaling, false) + " cm\n");
graphics.scale(
1.0 / resolutionScaling.getScaleX(),
1.0 / resolutionScaling.getScaleY());
}
if (log.isTraceEnabled()) {
generator.comment("SVG start");
}
//Save state and update coordinate system for the SVG image
generator.getState().save();
generator.getState().concatenate(imageTransform);
//Now that we have the complete transformation matrix for the image, we can update the
//transformation matrix for the AElementBridge.
PDFAElementBridge aBridge = (PDFAElementBridge)ctx.getBridge(
SVGDOMImplementation.SVG_NAMESPACE_URI, SVGConstants.SVG_A_TAG);
aBridge.getCurrentTransform().setTransform(generator.getState().getTransform());
graphics.setPaintingState(generator.getState());
graphics.setOutputStream(generator.getOutputStream());
try {
root.paint(graphics);
ctx.dispose();
generator.add(graphics.getString());
} catch (TransparencyDisallowedException e) {
SVGEventProducer eventProducer = SVGEventProducer.Provider.get(
context.getUserAgent().getEventBroadcaster());
eventProducer.bitmapWithTransparency(this, e.getProfile(), image.getInfo().getOriginalURI());
} catch (Exception e) {
SVGEventProducer eventProducer = SVGEventProducer.Provider.get(
context.getUserAgent().getEventBroadcaster());
eventProducer.svgRenderingError(this, e, image.getInfo().getOriginalURI());
}
generator.getState().restore();
if (context.getUserAgent().isAccessibilityEnabled()) {
generator.restoreGraphicsStateAccess();
} else {
generator.restoreGraphicsState();
}
if (log.isTraceEnabled()) {
generator.comment("SVG end");
}
}