问题描述
我有一个像这样的 PNG 图像:
I have a PNG image like this:
我想把图片改成这样:
如何在 JavaFX 中执行此操作?
How can I do this in JavaFX?
推荐答案
由于您不关心它是矢量形状还是位图,我将在这里仅使用位图概述解决方案.如果你真的想要一个矢量形状,我相信你需要使用矢量输入来获得一个好的结果.
As you don't care if it is a vector shape or a bitmap, I'll just outline solutions using a bitmap here. If you actually wanted a vector shape, I believe you would need to work with vector input to get a good result.
使用颜色调整效果并将亮度设置为最小值 (-1).为 SPEED 缓存结果.
Use a ColorAdjust effect with the brightness set to minimum (-1).Cache the result for SPEED.
这是一个创建图像阴影轮廓的示例:
Here is a sample which creates a shadow outline of an image:
import javafx.application.Application;
import javafx.scene.*;
import javafx.scene.effect.ColorAdjust;
import javafx.scene.image.*;
import javafx.stage.Stage;
public class Shadow extends Application {
@Override
public void start(Stage stage) throws Exception {
ImageView imageView = new ImageView(
new Image(
"http://i.stack.imgur.com/jbT1H.png"
)
);
ColorAdjust blackout = new ColorAdjust();
blackout.setBrightness(-1.0);
imageView.setEffect(blackout);
imageView.setCache(true);
imageView.setCacheHint(CacheHint.SPEED);
stage.setScene(new Scene(new Group(imageView)));
stage.show();
}
public static void main(String[] args) {
Application.launch();
}
}
这是另一个调整图像颜色的示例,将鼠标悬停在 smurfette 上使她脸红.
Here is another sample which adjusts the color of an image, hover over smurfette to make her blush.
import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.scene.*;
import javafx.scene.effect.*;
import javafx.scene.image.*;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class Shadow extends Application {
@Override
public void start(Stage stage) throws Exception {
Image image = new Image(
"http://icons.iconarchive.com/icons/designbolts/smurfs-movie/128/smurfette-icon.png"
);
ImageView imageView = new ImageView(image);
imageView.setClip(new ImageView(image));
ColorAdjust monochrome = new ColorAdjust();
monochrome.setSaturation(-1.0);
Blend blush = new Blend(
BlendMode.MULTIPLY,
monochrome,
new ColorInput(
0,
0,
imageView.getImage().getWidth(),
imageView.getImage().getHeight(),
Color.RED
)
);
imageView.effectProperty().bind(
Bindings
.when(imageView.hoverProperty())
.then((Effect) blush)
.otherwise((Effect) null)
);
imageView.setCache(true);
imageView.setCacheHint(CacheHint.SPEED);
stage.setScene(new Scene(new Group(imageView), Color.AQUA));
stage.show();
}
public static void main(String[] args) {
Application.launch();
}
}
这篇关于如何在 JavaFX 中更改图像的颜色的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!