public static RenderedOp createTiledImage(RenderedImage image, int tileWidth, int tileHeight) {
final int dataType = image.getSampleModel().getDataType();
final ImageLayout imageLayout = new ImageLayout();
imageLayout.setTileWidth(tileWidth);
imageLayout.setTileHeight(tileHeight);
final RenderingHints hints = new RenderingHints(JAI.KEY_IMAGE_LAYOUT, imageLayout);
return FormatDescriptor.create(image, dataType, hints);
}
@Test
public void testRoundTripTiledImage() throws Exception {
BufferedImage input = ImageIO.read(sourceFile);
// prepare a tiled image layout
ImageLayout il = new ImageLayout(input);
il.setTileWidth(8);
il.setTileHeight(8);
RenderingHints hints = new RenderingHints(JAI.KEY_IMAGE_LAYOUT, il);
RenderedOp tiled = FormatDescriptor.create(input, input.getSampleModel().getDataType(), hints);
assertEquals(8, tiled.getTileWidth());
assertEquals(8, tiled.getTileHeight());
roundTripPNGJ(input, tiled);
}
/**
* For each raster: crop->scale->translate->add to mosaic
*
* @param queries
* @param mosaicGeometry
* @return
* @throws IOException
*/
private RenderedImage createMosaic(
final List<RasterQueryInfo> queries,
final GridEnvelope mosaicGeometry,
final LoggingHelper log)
throws IOException {
List<RenderedImage> transformed = new ArrayList<RenderedImage>(queries.size());
/*
* Do we need to expand to RGB color space and then create a new colormapped image with the
* whole mosaic?
*/
boolean expandCM = queries.size() > 1 && rasterInfo.isColorMapped();
if (expandCM) {
LOGGER.fine(
"Creating mosaic out of "
+ queries.size()
+ " colormapped rasters. The mosaic tiles will be expanded to "
+ "\nRGB space and the resulting mosaic reduced to a new IndexColorModel");
}
for (RasterQueryInfo query : queries) {
RenderedImage image = query.getResultImage();
log.log(image, query.getRasterId(), "01_original");
if (expandCM) {
if (LOGGER.isLoggable(Level.FINER)) {
LOGGER.finer(
"Creating color expanded version of tile for raster #" + query.getRasterId());
}
/*
* reformat the image as a 4 band rgba backed by byte data
*/
image = FormatDescriptor.create(image, Integer.valueOf(DataBuffer.TYPE_BYTE), null);
log.log(image, query.getRasterId(), "04_1_colorExpanded");
}
image = cropToRequiredDimension(image, query.getResultGridRange());
log.log(image, query.getRasterId(), "02_crop");
// Raster data = image.getData();
// image = new BufferedImage(image.getColorModel(), (WritableRaster) data, false, null);
if (queries.size() == 1) {
return image;
}
final GridEnvelope mosaicLocation = query.getMosaicLocation();
// scale
Float scaleX = Float.valueOf(((float) mosaicLocation.getSpan(0) / image.getWidth()));
Float scaleY = Float.valueOf(((float) mosaicLocation.getSpan(1) / image.getHeight()));
Float translateX = Float.valueOf(0);
Float translateY = Float.valueOf(0);
if (!(Float.valueOf(1.0F).equals(scaleX) && Float.valueOf(1.0F).equals(scaleY))) {
ParameterBlock pb = new ParameterBlock();
pb.addSource(image);
pb.add(scaleX);
pb.add(scaleY);
pb.add(translateX);
pb.add(translateY);
pb.add(new InterpolationNearest());
image = JAI.create("scale", pb);
log.log(image, query.getRasterId(), "03_scale");
int width = image.getWidth();
int height = image.getHeight();
assert mosaicLocation.getSpan(0) == width;
assert mosaicLocation.getSpan(1) == height;
}
if (image.getMinX() != mosaicLocation.getLow(0)
|| image.getMinY() != mosaicLocation.getLow(1)) {
// translate
ParameterBlock pb = new ParameterBlock();
pb.addSource(image);
pb.add(Float.valueOf(mosaicLocation.getLow(0) - image.getMinX()));
pb.add(Float.valueOf(mosaicLocation.getLow(1) - image.getMinY()));
pb.add(null);
image = JAI.create("translate", pb);
log.log(image, query.getRasterId(), "04_translate");
assert image.getMinX() == mosaicLocation.getLow(0)
: image.getMinX() + " != " + mosaicLocation.getLow(0);
assert image.getMinY() == mosaicLocation.getLow(1)
: image.getMinY() + " != " + mosaicLocation.getLow(1);
assert image.getWidth() == mosaicLocation.getSpan(0)
: image.getWidth() + " != " + mosaicLocation.getSpan(0);
assert image.getHeight() == mosaicLocation.getSpan(1)
: image.getHeight() + " != " + mosaicLocation.getSpan(1);
}
transformed.add(image);
}
final RenderedImage mosaic;
if (queries.size() == 1) {
/*
* This is besides a very slight perf improvement needed because the JAI mosaic
* operation truncates floating point raster values to 0 and 1. REVISIT: If there's no
* workaround for that we should prevent raster catalogs made of floating point rasters
* and throw an exception as we could not really support that.
*/
mosaic = transformed.get(0);
} else {
/*
* adapted from RasterLayerResponse.java in the imagemosaic module
*/
ParameterBlockJAI mosaicParams = new ParameterBlockJAI("Mosaic");
mosaicParams.setParameter("mosaicType", MosaicDescriptor.MOSAIC_TYPE_OVERLAY);
// set background values to raster's no-data
double[] backgroundValues;
if (expandCM) {
backgroundValues = new double[] {0, 0, 0, 0};
} else {
final int numBands = rasterInfo.getNumBands();
backgroundValues = new double[numBands];
final int rasterIndex = 0;
Number noDataValue;
for (int bn = 0; bn < numBands; bn++) {
noDataValue = rasterInfo.getNoDataValue(rasterIndex, bn);
backgroundValues[bn] = noDataValue.doubleValue();
}
}
mosaicParams.setParameter("backgroundValues", backgroundValues);
final ImageLayout layout =
new ImageLayout(
mosaicGeometry.getLow(0),
mosaicGeometry.getLow(1),
mosaicGeometry.getSpan(0),
mosaicGeometry.getSpan(1));
final int tileWidth = rasterInfo.getTileDimension(0).width;
final int tileHeight = rasterInfo.getTileDimension(0).height;
layout.setTileWidth(tileWidth);
layout.setTileHeight(tileHeight);
final RenderingHints hints = new RenderingHints(JAI.KEY_IMAGE_LAYOUT, layout);
for (RenderedImage img : transformed) {
mosaicParams.addSource(img);
log.appendLoggingGeometries(LoggingHelper.MOSAIC_RESULT, img);
}
log.log(LoggingHelper.MOSAIC_RESULT);
LOGGER.fine("Creating mosaic out of " + queries.size() + " raster tiles");
mosaic = JAI.create("Mosaic", mosaicParams, hints);
log.log(mosaic, 0L, "05_mosaic_result");
}
return mosaic;
}