Examples with Raster ol.source.Raster used on opensource projects

Example 1 with Raster

use of ol.source.Raster in project gwt-ol3 by TDesjardins.

the class RasterExample method show.

/*
     * (non-Javadoc)
     * @see de.desjardins.ol3.demo.client.example.Example#show()
     */
@Override
public void show(String exampleId) {
    XyzOptions osmSourceOptions = OLFactory.createOptions();
    osmSourceOptions.setCrossOrigin("Anonymous");
    Osm osmSource = new Osm(osmSourceOptions);
    LayerOptions osmLayerOptions = OLFactory.createOptions();
    osmLayerOptions.setSource(osmSource);
    // create OSM layer only for background and attribution
    Tile osmLayer = new Tile(osmLayerOptions);
    // create raster source
    Raster raster = getRasterSource(osmSource, RasterOperationType.PIXEL);
    LayerOptions layerOptions = OLFactory.createOptions();
    layerOptions.setSource(raster);
    Image image = new Image(layerOptions);
    Collection<Base> layers = new Collection<>();
    layers.push(osmLayer);
    layers.push(image);
    View view = new View();
    Coordinate centerCoordinate = new Coordinate(-0.1275, 51.507222);
    Coordinate transformedCenterCoordinate = Projection.transform(centerCoordinate, DemoConstants.EPSG_4326, DemoConstants.EPSG_3857);
    view.setCenter(transformedCenterCoordinate);
    view.setZoom(10);
    MapOptions mapOptions = OLFactory.createOptions();
    mapOptions.setTarget(exampleId);
    mapOptions.setView(view);
    mapOptions.setLayers(layers);
    Map map = new Map(mapOptions);
    // add some controls
    DemoUtils.addDefaultControls(map.getControls());
}

Example 2 with Raster

use of ol.source.Raster in project gwt-ol3 by TDesjardins.

the class RasterExample method getRasterSource.

private static Raster getRasterSource(Source source, RasterOperationType type) {
    // wrap source with raster source layer
    RasterOptions rasterOptions = OLFactory.createRasterOptionsWithSource(source);
    rasterOptions.setOperationType(type);
    RasterOperation<?> rasterOperation = null;
    switch(type) {
        case PIXEL:
            rasterOperation = (PixelColor[] pixels) -> {
                final int channel = 0;
                final int threshold = 245;
                // get pixel of first source
                PixelColor pixel = pixels[0];
                // extract pixel value and apply operation
                int value = pixel.getChannel(channel);
                pixel.clear();
                if (value > threshold) {
                    pixel.setChannel(channel, 255);
                    pixel.setAlpha(128);
                }
                return pixel;
            };
            break;
        case IMAGE:
            rasterOperation = (ImageData[] sourceImages) -> {
                // get image of first source
                ImageData image = sourceImages[0];
                // apply image wide operation, make the lower part of the image darker
                final int width = image.width;
                final int height = image.height;
                PixelColor pixel = new PixelColor(0, 0, 0, 128);
                for (int y = height / 2; y < height; ++y) {
                    for (int x = 0; x < width; ++x) {
                        image.putPixel(x, y, pixel);
                    }
                }
                return image;
            };
            break;
    }
    // set raster operation and return raster
    rasterOptions.setOperation(rasterOperation);
    return new Raster(rasterOptions);
}