JavaFX | Bloom Class

Bloom class is a part of JavaFX. Bloom is a high-level effect that makes brighter portions of the input image appear to glow, based on a configurable threshold. Bloom class inherits Effect class.

Constructors of the class:

1. Bloom(): Creates a new Bloom Object .
2. Bloom(double t): Creates a new Bloom effect with a specified threshold.

Commonly Used Methods:

Method	Explanation
getInput()	Gets the value of the property input
getThreshold()	Returns the value of threshold
setInput(Effect v)	Sets the value of the property input
setThreshold(double v)	Sets the threshold value of the effect

Below programs illustrate the use of Bloom class:

1. Java program to import an image and add bloom effect to it: In this program a FileInputStream is created and an image is taken as input from a file. Image named image is created using the input from the file input stream. From the image, an image view object is created and it is added to the VBox.The VBox is then added to the scene and the scene is added to the stage. A Bloom effect is created with a specified level passed as parameters and the effect is set to the image view using setEffect() function.

   // Java program to import an image
   // and add bloom effect to it
   import javafx.application.Application;
   import javafx.scene.Scene;
   import javafx.scene.control.*;
   import javafx.scene.layout.*;
   import javafx.stage.Stage;
   import javafx.scene.image.*;
   import javafx.scene.effect.*;
   import java.io.*;
   import javafx.event.ActionEvent;
   import javafx.event.EventHandler;
   import javafx.scene.Group;
   
   public class bloom_1 extends Application {
   
       // launch the application
       public void start(Stage stage) throws Exception
       {
   
           // set title for the stage
           stage.setTitle("Bloom Example");
   
           // create a input stream
           FileInputStream input = new FileInputStream("D:\\GFG.png");
   
           // create a image
           Image image = new Image(input);
   
           // create a image View
           ImageView imageview = new ImageView(image);
   
           // create a bloom effect
           Bloom bloom = new Bloom(0.9);
   
           // set effect
           imageview.setEffect(bloom);
   
           // create a VBox
           VBox vbox = new VBox(imageview);
   
           // create a scene
           Scene scene = new Scene(vbox, 200, 200);
   
           // set the scene
           stage.setScene(scene);
   
           stage.show();
       }
   
       // Main Method
       public static void main(String args[])
       {
   
           // launch the application
           launch(args);
       }
   }

   Input Image:

   

   Output:

   

2. Java program to import an image and set bloom effect to it, the Threshold value of the bloom effect can be controlled using a button: In this program an FileInputStream is created and an image is taken as input from a file. Image named image is created using the input from the file input stream. From the image, an image view object is created and it is added to the VBox.The VBox is then added to the scene and the scene is added to the stage. A Bloom effect is created with a specified level passed as parameters and the effect is set to the image view using setEffect() function. A Button named button is created which is used to increase the bloom of the image. The button is also added to the VBox. The bloom of the image is increased using the setThreshold() function. The events related to button is handled using EventHandler.

   // Java program to import an image and
   // set bloom effect to it. The Threshold
   // value of the bloom effect can be
   // controlled using the button
   import javafx.application.Application;
   import javafx.scene.Scene;
   import javafx.scene.control.*;
   import javafx.scene.layout.*;
   import javafx.stage.Stage;
   import javafx.scene.image.*;
   import javafx.scene.effect.*;
   import java.io.*;
   import javafx.event.ActionEvent;
   import javafx.event.EventHandler;
   import javafx.scene.Group;
   
   public class bloom_2 extends Application {
   
       double level = 0.1;
   
       // launch the application
       public void start(Stage stage) throws Exception
       {
   
           // set title for the stage
           stage.setTitle("Bloom Example");
   
           // create a input stream
           FileInputStream input = new FileInputStream("D:\\GFG.png");
   
           // create a image
           Image image = new Image(input);
   
           // create a image View
           ImageView imageview = new ImageView(image);
   
           // create a bloom effect
           Bloom bloom = new Bloom(level);
   
           // create a button
           Button button = new Button("bloom");
   
           // action event
           EventHandler<ActionEvent> event = new EventHandler<ActionEvent>() {
   
               public void handle(ActionEvent e)
               {
   
                   // increase the level
                   level += 0.1;
                   if (level > 1)
                       level = 0.0;
   
                   // set Level for bloom
                   bloom.setThreshold(level);
               }
           };
   
           // set on action of button
           button.setOnAction(event);
   
           // set effect
           imageview.setEffect(bloom);
   
           // create a VBox
           VBox vbox = new VBox(imageview, button);
   
           // create a scene
           Scene scene = new Scene(vbox, 200, 200);
   
           // set the scene
           stage.setScene(scene);
   
           stage.show();
       }
   
       // Main Method
       public static void main(String args[])
       {
   
           // launch the application
           launch(args);
       }
   }

   Input Image:
   

   Output:

Note: The above programs might not run in an online IDE. Please use an offline compiler.

Reference: https://docs.oracle.com/javase/8/javafx/api/javafx/scene/effect/Bloom.html