Examples with GridCoverage org.apache.sis.coverage.grid.GridCoverage used on opensource projects

Example 1 with GridCoverage

use of org.apache.sis.coverage.grid.GridCoverage in project sis by apache.

the class ValuesUnderCursor method create.

/**
 * Creates a new instance for the given canvas and registers as a listener by weak reference.
 * Caller must retain the returned reference somewhere, e.g. in {@link StatusBar#sampleValuesProvider}.
 *
 * @param  canvas  the canvas for which to create a {@link ValuesUnderCursor}, or {@code null}.
 * @return the sample values provider, or {@code null} if none.
 */
static ValuesUnderCursor create(final MapCanvas canvas) {
    if (canvas instanceof CoverageCanvas) {
        final FromCoverage listener = new FromCoverage();
        final ObjectProperty<GridCoverage> coverageProperty = ((CoverageCanvas) canvas).coverageProperty;
        coverageProperty.addListener(new WeakChangeListener<>(listener));
        final GridCoverage coverage = coverageProperty.get();
        if (coverage != null) {
            listener.changed(null, null, coverage);
        }
        return listener;
    } else {
    // More cases may be added in the future.
    }
    return null;
}

Example 2 with GridCoverage

use of org.apache.sis.coverage.grid.GridCoverage in project sis by apache.

the class CoverageExplorer method getViewAndControls.

/**
 * Returns the view-control pair for the given view type.
 * The view-control pair is created when first needed.
 * Invoking this method may cause data to be loaded in a background thread.
 *
 * @param  type  type of view to obtain.
 * @param  load  whether to force loading of data in the new type.
 */
private ViewAndControls getViewAndControls(final View type, boolean load) {
    ViewAndControls c = views.get(type);
    if (c == null) {
        switch(type) {
            case TABLE:
                c = new GridControls(this);
                break;
            case IMAGE:
                c = new CoverageControls(this);
                break;
            default:
                throw new AssertionError(type);
        }
        SplitPane.setResizableWithParent(c.view(), Boolean.TRUE);
        views.put(type, c);
        load = true;
    }
    /*
         * If this explorer is showing a coverage, load data in the newly created view.
         * Data may also be loaded because the view was previously unselected (hidden)
         * and became selected (visible).
         */
    if (load) {
        final GridCoverageResource resource = getResource();
        final GridCoverage coverage = getCoverage();
        if (resource != null || coverage != null) {
            c.load(new ImageRequest(resource, coverage));
        }
    }
    return c;
}

Example 3 with GridCoverage

use of org.apache.sis.coverage.grid.GridCoverage in project sis by apache.

the class ImageRequest method load.

/**
 * Loads the image. If the coverage has more than {@value #BIDIMENSIONAL} dimensions,
 * only two of them are taken for the image; for all other dimensions, only the values
 * at lowest index will be read.
 *
 * <p>If the {@link #coverage} field was null, it will be initialized as a side-effect.
 * No other fields will be modified.</p>
 *
 * <h4>Thread safety</h4>
 * This class does not need to be thread-safe because it should be used only once in a well-defined life cycle.
 * We nevertheless synchronize as a safety (e.g. user could give the same {@code ImageRequest} to two different
 * {@link CoverageExplorer} instances). In such case the {@link GridCoverage} will be loaded only once,
 * but no caching is done for the {@link RenderedImage} (because usually not needed).
 *
 * @param  task  the task invoking this method (for checking for cancellation).
 * @return the image loaded from the source given at construction time, or {@code null}
 *         if the task has been cancelled.
 * @throws DataStoreException if an error occurred while loading the grid coverage.
 */
final synchronized RenderedImage load(final FutureTask<?> task) throws DataStoreException {
    GridCoverage cv = coverage;
    final Long id = LogHandler.loadingStart(resource);
    try {
        if (cv == null) {
            cv = MultiResolutionImageLoader.getInstance(resource, null).getOrLoad(domain, range);
        }
        coverage = cv = cv.forConvertedValues(true);
        if (task.isCancelled()) {
            return null;
        }
        GridExtent ex = sliceExtent;
        if (ex == null) {
            final GridGeometry gg = cv.getGridGeometry();
            if (gg.getDimension() > MultiResolutionImageLoader.BIDIMENSIONAL) {
                ex = MultiResolutionImageLoader.slice(gg.derive(), gg.getExtent()).getIntersection();
            }
        }
        return cv.render(ex);
    } finally {
        LogHandler.loadingStop(id);
    }
}

Example 4 with GridCoverage

use of org.apache.sis.coverage.grid.GridCoverage in project sis by apache.

the class MultiResolutionCoverageLoader method getOrLoad.

/**
 * Returns the coverage at the given level if it is present in the cache, or loads and caches it otherwise.
 *
 * @param  level  pyramid level of the desired coverage.
 * @return the coverage at the specified level (never null).
 * @throws DataStoreException if an error occurred while loading the coverage.
 */
public final GridCoverage getOrLoad(final int level) throws DataStoreException {
    synchronized (coverages) {
        final Reference<GridCoverage> ref = coverages[level];
        if (ref != null) {
            final GridCoverage coverage = ref.get();
            if (coverage != null)
                return coverage;
            coverages[level] = null;
        }
    }
    GridGeometry domain = null;
    if (resolutionSquared.length != 0) {
        final double[] resolutions = resolutionSquared[level].clone();
        for (int i = 0; i < resolutions.length; i++) {
            resolutions[i] = Math.sqrt(resolutions[i]);
        }
        final MathTransform gridToCRS = MathTransforms.scale(resolutions);
        domain = new GridGeometry(PixelInCell.CELL_CORNER, gridToCRS, areaOfInterest, GridRoundingMode.ENCLOSING);
    }
    final GridCoverage coverage = resource.read(getReadDomain(domain), readRanges);
    /*
         * Cache and return the coverage. The returned coverage may be a different instance
         * if another coverage has been cached concurrently for the same level.
         */
    synchronized (coverages) {
        final Reference<GridCoverage> ref = coverages[level];
        if (ref != null) {
            final GridCoverage c = ref.get();
            if (c != null)
                return c;
        }
        coverages[level] = new SoftReference<>(coverage);
    }
    return coverage;
}

Example 5 with GridCoverage

use of org.apache.sis.coverage.grid.GridCoverage in project sis by apache.

the class MultiResolutionCoverageLoader method toString.

/**
 * Returns a string representation of this loader for debugging purpose.
 * Default implementation formats the resolution thresholds in a table
 * with "cached" word after the level having a cached coverage.
 *
 * @return a string representation of this loader.
 */
@Override
public String toString() {
    final int count = getLastLevel();
    double delta = magnitude(0);
    if (count != 0) {
        delta = (magnitude(count) - delta) / count;
    }
    final int n = Math.max(Math.min(DecimalFunctions.fractionDigitsForDelta(delta, false), 6), 0);
    final NumberFormat f = NumberFormat.getInstance();
    f.setMinimumFractionDigits(n);
    f.setMaximumFractionDigits(n);
    final TableAppender table = new TableAppender("  ");
    table.setCellAlignment(TableAppender.ALIGN_RIGHT);
    for (int level = 0; level <= count; level++) {
        final double[] rs = resolutionSquared[level];
        for (final double r : rs) {
            table.append(f.format(Math.sqrt(r)));
            table.nextColumn();
        }
        final Reference<GridCoverage> ref = coverages[level];
        if (ref != null && ref.get() != null) {
            // TODO: use !refersTo(null) in JDK16.
            table.append("cached");
        }
        table.nextLine();
    }
    return table.toString();
}