Examples of javax.media.jai.RenderedImageList

javax.media.jai.RenderedImageList
A CollectionImage which is also a RenderedImage. The underlying Collection in this case is required to be a List containing only RenderedImages.
Instances of this class may be returned from either a RenderedImageFactory or from a CollectionImageFactory. This class would be particularly useful for implementing operations the result of which includes a single primary image and one or more secondary or dependant images the data of which are less likely to be requested.
Invocations of RenderedImage methods on an instance of this class will be forwarded to the first RenderedImage in the underlying List, i.e., the image at index zero. This should be the index assigned to the primary image in the case alluded to above. If there are no images in the List when a RenderedImage method is invoked an IllegalStateException will be thrown.
One example of the use of this class is in generating a classmap image using a classification algorithm. A by-product image of such an operation is often an error image wherein the value of each pixel is some measure of the classification error at that pixel. In this case the classmap image would be stored at index zero in the internal list and the error image at the unity index. The error image would be an OpImage that has the classmap image as its source. The result is that a reference to the error image is always available with the classmap image but the computation of the error image pixel values may be deferred until such time as the data are needed, if ever.
Methods defined in the RenderedImage and List interfaces are not all commented in detail. The List methods merely forward the call in most cases directly to the underlying List; as previously stated, RenderedImage method invocations are forwarded to the RenderedImage at position zero in the List. @since JAI 1.1 @see CollectionImage @see java.awt.image.RenderedImage @see java.util.List


        }
        // the original image should always be a list of rendered images unless metatiling is
        // activated
        int numfiles = 1;
        final RenderedImageList ril;
        if (originalImage instanceof RenderedImageList) {
            // convert to list
            ril = (RenderedImageList) originalImage;


            // get number of images
            numfiles = ril.size();
        } else {
            ril = new RenderedImageList(Arrays.asList(originalImage));
        }
        if (numfiles == 1 || !animatedGIF) {
            if (LOGGER.isLoggable(Level.FINE))
                LOGGER.fine("Preparing to write a gif...");
            //
            // Now the magic
            //
            try {
                originalImage = applyPalette(originalImage, mapContent, MIME_TYPE, false);
                ImageWorker iw = new ImageWorker(originalImage);
                iw.writeGIF(outStream, "LZW", 0.75f);
                RasterCleaner.addImage(iw.getRenderedImage());
            } catch (IOException e) {
                throw new ServiceException(e);
            }
            return;
        }


        // check the number is >1
        if (numfiles <= 0) {
            throw new ServiceException("The number of frames for this GIF is less than 1");
        }


        final GIFImageWriter gifWriter = new GIFImageWriter(ORIGINATING_PROVIDER);
        // write param
        final ImageWriteParam param = gifWriter.getDefaultWriteParam();
        param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
        param.setCompressionType("LZW");
        param.setCompressionQuality(0.75f);


        ImageOutputStream otStream = null;
        List<RenderedImage> images = new ArrayList<RenderedImage>();
        try {
            otStream = ImageIO.createImageOutputStream(outStream);
            gifWriter.setOutput(otStream);
            gifWriter.prepareWriteSequence(null);


            // gif params
            final GetMapRequest request = (GetMapRequest) mapContent.getRequest();
            final Boolean loopContinuosly = (request.getFormatOptions().get("gif_loop_continuosly") != null ?
                    Boolean.valueOf((String)request.getFormatOptions().get("gif_loop_continuosly")) : wms.getLoopContinuously());
            final Integer delay = (request.getFormatOptions().get("gif_frames_delay") != null ? 
                    Integer.valueOf((String) request.getFormatOptions().get("gif_frames_delay")) : wms.getFramesDelay());


            // check value
            if (delay <= 0)
                throw new ServiceException("Animate GIF delay invalid: " + delay);


            //
            // Getting input files
            //
            for (int i = 0; i < numfiles; i++) {
                if (LOGGER.isLoggable(Level.FINE))
                    LOGGER.fine("Writing image " + i);
                // get the image
                RenderedImage ri = (RenderedImage) ril.get(i);
                // convert it to gif compatible
                ri = applyPalette(ri, mapContent, MIME_TYPE, false);
                if (ri != null) {
                    // prepare metadata and write param
                    final IIOMetadata imageMetadata = gifWriter.getDefaultImageMetadata(

View Full Code Here

        List<RenderedImage> list = images.get();
        if (list != null) {
            images.remove();
            for (RenderedImage image : list) {
                if (image instanceof RenderedImageList) {
                    RenderedImageList ril = (RenderedImageList) image;
                    for (int i = 0; i < ril.size(); i++) {
                        disposeImage((RenderedImage) ril.get(i));
                    }
                } else {
                    disposeImage(image);
                }
            }

View Full Code Here

                mapContent.layers().clear();
                
                // collect the layer
                images.add(((RenderedImageMap)map).getImage());
            }
            RenderedImageList imageList = new RenderedImageList(images);
            return new  RenderedImageMap(mapContent, imageList , map.getMimeType());
        } else if(numElevations > 1 && isMultivaluedSupported) {
            WebMap map = null;
            List<RenderedImage> images = new ArrayList<RenderedImage>();
            for (Object currentElevation : elevations){
                map = executeInternal(mapContent, request, delegate, times, Arrays.asList(currentElevation));
                
                // remove layers to start over again
                mapContent.layers().clear();
                
                // collect the layer
                images.add(((RenderedImageMap)map).getImage());
            }
            RenderedImageList imageList = new RenderedImageList(images);
            return new  RenderedImageMap(mapContent, imageList , map.getMimeType());
        } else {
            return executeInternal(mapContent, request, delegate, times, elevations);    
        }

View Full Code Here

TOP

Related Classes of javax.media.jai.RenderedImageList

org.geoserver.wms.animate.FrameCatalogVisitor

org.geoserver.wms.GetMap

org.geoserver.wms.map.GIFMapResponse

org.geoserver.wms.RasterCleaner

java.util.Vector

java.util.Iterator

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.