private void paintBackground(WmsRequest request, Graphics2D g) {
g.setColor(request.getBackgroundColor());
g.setBackground(request.getBackgroundColor());
if (request.isTransparent()) g.setComposite(AlphaComposite.getInstance(AlphaComposite.CLEAR));
else g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.0f));
g.fillRect(0, 0, 100, 100);
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f));
}
private void paintImage(final WmsRequest request, Graphics2D g) {
log.info("painting layers " + request.getLayers());
if (DRAW_IN_PARALLEL) {
paintImageParallel(request, g);
} else {
// using only a single g2d seems to help with IE8 png transparency
// bug (fixed in IE9).
for (final String layerName : request.getLayers()) {
paintLayer(g, layerName, layers, request);
}
}
}
private MyGraphics createGraphics(WmsRequest request) {
log.info("creating buffered image");
BufferedImage image =
new BufferedImage(request.getWidth(), request.getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g = (Graphics2D) image.getGraphics();
// set rendering options
prepareGraphics(g);
// paint the background with transparency as required
paintBackground(request, g);
log.info("image ready");
return new MyGraphics(image, g);
}
Map<String, String> getInfos(Date time, WmsRequest request, Point point, String mimeType) {
Map<String, String> map = new HashMap<String, String>();
for (String layerName : request.getLayers()) {
Layer layer = layers.getLayer(layerName);
if (layer != null) {
String info = layer.getInfo(time, request, point, mimeType);
if (info != null) map.put(layerName, info);
} else log.warn("no getInfo implementation for layer: " + layerName);
}
return map;
}
private void paintImageParallel(WmsRequest request, Graphics2D g) {
// create future for each worker (layer)
List<Future<BufferedImage>> futures = new ArrayList<Future<BufferedImage>>();
for (final String layerName : request.getLayers()) {
// create a worker for layer
Callable<BufferedImage> worker = createWorker(layers, layerName, request);
// start the worker
Future<BufferedImage> submit = executor.submit(worker);
// record the worker in a list so we can paint the images in
// order later
futures.add(submit);
}
// wait for each image to complete in turn then draw it to the
// everything graphics object
for (Future<BufferedImage> future : futures) {
drawImage(g, future);
}
}
