ecql-service/tile-service/src/main/java/cn/com/taiji/tile/util/TileUtils.java

package cn.com.taiji.tile.util;


import cn.com.taiji.tile.model.POI;
import cn.com.taiji.tile.model.Point;
import org.apache.commons.lang3.StringUtils;
import org.locationtech.jts.geom.Coordinate;
import org.locationtech.jts.geom.Geometry;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.*;
import java.util.List;

/**
 * @author zzyx 2023/12/5
 */
public class TileUtils {

    public static byte[] getTile(List<Map<String,Object>> maps, String bboxStr){
        List<POI> list = convert(maps);
        return setColorTile(list,bboxStr);
    }

    public static List<POI> convert(List<Map<String, Object>> maps) {
        List<POI> pois = new ArrayList<>();
        for (Map<String, Object> map : maps) {
            POI poi = new POI();
            poi.setId((String) map.get("id"));
            poi.setName((String) map.get("id"));
            poi.setShape(map.get("location").toString());
            poi.setLat(0d);
            poi.setLon(0d);
            poi.setPcolor("rgb(255, 255, 0)");
            pois.add(poi);
        }
        return pois;
    }


    public static BufferedImage scaleWidthHeight(BufferedImage image, int width, int height) {
        BufferedImage i2 = new BufferedImage(width, height, 2);
        i2.getGraphics().drawImage(image.getScaledInstance(width, height, 4), 0, 0, null);
        return i2;
    }

    public static boolean ins(Point point1, Point point2) {
        double distance = point1.distanceTo(point2);
        double markerMusure = 12.0D;
        return (markerMusure >= distance);
    }


    public static byte[] setColorTile(List<POI> poiList, String bboxStr) {
        BufferedImage image = new BufferedImage(256, 256, 2);
        String[] split = bboxStr.split(",");
        // 接受前端传递的bbox 进行解析
        double[] bbox = new double[split.length];
        for (int i = 0; i < split.length; i++) {
            bbox[i] = Double.parseDouble(split[i]);
        }
        Graphics2D g = (Graphics2D) image.getGraphics();
        g.setColor(Color.GREEN);
        for (POI poi : poiList) {
            TileUtils.drawShapeToTile(poi, g, bbox, 1);
        }
        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        try {
            ImageIO.write(image, "png", buffer);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return buffer.toByteArray();
    }

    public static void drawShapeToTile(POI poi, Graphics2D graphics, double[] bbox, int lineSize) {
        Geometry shape = GeoUtils.getGeoUtils().createGeometry(poi.getShape());
        if(StringUtils.isNotBlank(poi.getPcolor())) {
            String[] rgb = StringUtils.substring(poi.getPcolor(), poi.getPcolor().indexOf("rgb(") + 4, poi.getPcolor().length() - 1).split(",");
            Color color = new Color(Integer.parseInt(rgb[0].trim()), Integer.parseInt(rgb[1].trim()), Integer.parseInt(rgb[2].trim()));
            graphics.setColor(color);
        }
        if(shape!=null&&shape.getCoordinate()!=null&&StringUtils.equals(shape.getGeometryType(),"Point")){
            int[] pxy = TileUtils.toPixelXY(shape.getCoordinate().getX(),shape.getCoordinate().getY(), bbox[0], bbox[1], bbox[2], bbox[3]);
            graphics.drawArc(pxy[0], pxy[1], 6, 6, 0, 360);
            graphics.fillArc(pxy[0], pxy[1], 6, 6, 0, 360);
        }
        if (shape != null && shape.getCoordinates() != null && (shape.getCoordinates()).length > 1 &&
                StringUtils.isNotBlank(poi.getPcolor()) && StringUtils.indexOf(poi.getPcolor(), "rgb(") >= 0) {
            if (StringUtils.equals(shape.getGeometryType(), "Polygon") ||
                    StringUtils.equals(shape.getGeometryType(), "LinearRing") ||
                    StringUtils.equals(shape.getGeometryType(), "LineString") ||
                    StringUtils.equals(shape.getGeometryType(), "MultiLineString")) {
                int[] xpoint = new int[(shape.getCoordinates()).length];
                int[] ypoint = new int[(shape.getCoordinates()).length];
                for (int i = 0; i < (shape.getCoordinates()).length; i++) {
                    Coordinate c = shape.getCoordinates()[i];
                    int[] pxy = toPixelXY(c.getX(), c.getY(), bbox[0], bbox[1], bbox[2], bbox[3]);
                    xpoint[i] = pxy[0];
                    ypoint[i] = pxy[1];
                }
                if (lineSize <= 0) {
                    lineSize = 1;
                }
                graphics.setStroke(new BasicStroke(lineSize));
                //抗锯齿
                graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
                if (StringUtils.equals(shape.getGeometryType(), "Polygon")) {
                    //fill 是将设置的颜色全部填充
                    graphics.fill(new Polygon(xpoint, ypoint, shape.getCoordinates().length));
//                    graphics.drawPolygon(xpoint, ypoint, (shape.getCoordinates()).length);
                } else if (StringUtils.equalsAny(shape.getGeometryType(), "LinearRing", "MultiLineString", "LineString")) {
                    graphics.drawPolyline(xpoint, ypoint, (shape.getCoordinates()).length);
                }
            }
        }
    }

    public byte[] newHotImageTileWithPoiList(List<POI> poiList, String bbox) {
        HotImageTile tile = new HotImageTile();
        return tile.setHotImage(poiList, bbox);
    }


    public static int[] toPixelXY(double x, double y, double minX, double minY, double maxX, double maxY) {
        int dx = (int) (256.0D * (x - minX) / (maxX - minX));
        int dy = 256 - (int) (256.0D * (y - minY) / (maxY - minY));
        return new int[]{dx, dy};
    }


}