ImageMaps/src/main/java/net/craftcitizen/imagemaps/ImageMapRenderer.java

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package net.craftcitizen.imagemaps;
import de.craftlancer.core.LambdaRunnable;
import org.bukkit.entity.Player;
import org.bukkit.map.MapCanvas;
import org.bukkit.map.MapPalette;
import org.bukkit.map.MapRenderer;
import org.bukkit.map.MapView;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
public class ImageMapRenderer extends MapRenderer {
private ImageMaps plugin;
private BufferedImage image = null;
private boolean first = true;
private final int x;
private final int y;
private final double scale;
public ImageMapRenderer(ImageMaps plugin, BufferedImage image, int x, int y, double scale) {
this.plugin = plugin;
this.x = x;
this.y = y;
this.scale = scale;
recalculateInput(image);
}
public void recalculateInput(BufferedImage input) {
if (x * ImageMaps.MAP_WIDTH > Math.round(input.getWidth() * scale)
|| y * ImageMaps.MAP_HEIGHT > Math.round(input.getHeight() * scale))
return;
int x1 = (int) Math.floor(x * ImageMaps.MAP_WIDTH / scale);
int y1 = (int) Math.floor(y * ImageMaps.MAP_HEIGHT / scale);
int x2 = (int) Math.ceil(Math.min(input.getWidth(), ((x + 1) * ImageMaps.MAP_WIDTH / scale)));
int y2 = (int) Math.ceil(Math.min(input.getHeight(), ((y + 1) * ImageMaps.MAP_HEIGHT / scale)));
if (x2 - x1 <= 0 || y2 - y1 <= 0)
return;
this.image = input.getSubimage(x1, y1, x2 - x1, y2 - y1);
if (scale != 1D) {
BufferedImage resized = new BufferedImage(ImageMaps.MAP_WIDTH, ImageMaps.MAP_HEIGHT,
input.getType() == 0 ? image.getType() : input.getType());
AffineTransform at = new AffineTransform();
at.scale(scale, scale);
AffineTransformOp scaleOp = new AffineTransformOp(at, AffineTransformOp.TYPE_BILINEAR);
this.image = scaleOp.filter(this.image, resized);
}
first = true;
}
@Override
public void render(MapView view, MapCanvas canvas, Player player) {
if (image != null && first) {
new LambdaRunnable(() -> canvas.drawImage(0, 0, image)).runTaskLater(plugin, System.nanoTime() % 60);
// spread out pseudo randomly in a very naive way
first = false;
}
}
}