// we create a template and a Graphics2D object that corresponds
// with it
PdfContentByte cb = writer.getDirectContent();
PdfTemplate tp = cb.createTemplate(width, height);
PdfGraphics2D graphic = (PdfGraphics2D) tp.createGraphics(width, height, mapper);
// we set graphics options
if (!mapContext.isTransparent()) {
graphic.setColor(mapContext.getBgColor());
graphic.fillRect(0, 0, width, height);
} else {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("setting to transparent");
}
int type = AlphaComposite.SRC;
graphic.setComposite(AlphaComposite.getInstance(type));
Color c = new Color(mapContext.getBgColor().getRed(),
mapContext.getBgColor().getGreen(), mapContext
.getBgColor().getBlue(), 0);
graphic.setBackground(mapContext.getBgColor());
graphic.setColor(c);
graphic.fillRect(0, 0, width, height);
type = AlphaComposite.SRC_OVER;
graphic.setComposite(AlphaComposite.getInstance(type));
}
Rectangle paintArea = new Rectangle(width, height);
renderer = new StreamingRenderer();
renderer.setContext(mapContext);
// TODO: expose the generalization distance as a param
// ((StreamingRenderer) renderer).setGeneralizationDistance(0);
RenderingHints hints = new RenderingHints(
RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
renderer.setJava2DHints(hints);
// we already do everything that the optimized data loading does...
// if we set it to true then it does it all twice...
Map rendererParams = new HashMap();
rendererParams
.put("optimizedDataLoadingEnabled", new Boolean(true));
rendererParams.put("renderingBuffer", new Integer(mapContext
.getBuffer()));
// we need the renderer to draw everything on the batik provided graphics object
rendererParams.put(StreamingRenderer.OPTIMIZE_FTS_RENDERING_KEY, Boolean.FALSE);
// render everything in vector form if possible
rendererParams.put(StreamingRenderer.VECTOR_RENDERING_KEY, Boolean.TRUE);
if(DefaultWebMapService.isLineWidthOptimizationEnabled()) {
rendererParams.put(StreamingRenderer.LINE_WIDTH_OPTIMIZATION_KEY, true);
}
if(DefaultWebMapService.isAdvancedProjectionHandlingEnabled()) {
rendererParams.put(StreamingRenderer.ADVANCED_PROJECTION_HANDLING_KEY, true);
}
renderer.setRendererHints(rendererParams);
Envelope dataArea = mapContext.getAreaOfInterest();
if (this.abortRequested) {
graphic.dispose();
// step 5: we close the document
document.close();
return;
}
// enforce no more than x rendering errors
int maxErrors = wms.getMaxRenderingErrors();
MaxErrorEnforcer errorChecker = new MaxErrorEnforcer(renderer, maxErrors);
// Add a render listener that ignores well known rendering exceptions and reports back non
// ignorable ones
final RenderExceptionStrategy nonIgnorableExceptionListener;
nonIgnorableExceptionListener = new RenderExceptionStrategy(renderer);
renderer.addRenderListener(nonIgnorableExceptionListener);
// enforce max memory usage
int maxMemory = wms.getMaxRequestMemory() * KB;
PDFMaxSizeEnforcer memoryChecker = new PDFMaxSizeEnforcer(renderer, graphic, maxMemory);
// render the map
renderer.paint(graphic, paintArea, getRenderingArea(), getRenderingTransform());
// render the watermark
MapDecorationLayout.Block watermark =
DefaultRasterMapProducer.getWatermark(this.mapContext.getRequest().getWMS().getServiceInfo());
if (watermark != null) {
MapDecorationLayout layout = new MapDecorationLayout();
layout.paint(graphic, paintArea, this.mapContext);
}
//check if a non ignorable error occurred
if(nonIgnorableExceptionListener.exceptionOccurred()){
Exception renderError = nonIgnorableExceptionListener.getException();
throw new WmsException("Rendering process failed", "internalError", renderError);
}
// check if too many errors occurred
if(errorChecker.exceedsMaxErrors()) {
throw new WmsException("More than " + maxErrors + " rendering errors occurred, bailing out",
"internalError", errorChecker.getLastException());
}
// check we did not use too much memory
if(memoryChecker.exceedsMaxSize()) {
long kbMax = maxMemory / KB;
throw new WmsException("Rendering request used more memory than the maximum allowed:"
+ kbMax + "KB");
}
graphic.dispose();
cb.addTemplate(tp, 0, 0);
// step 5: we close the document
document.close();
writer.flush();