paint With Alpha - Java 2D Graphics

Java examples for 2D Graphics:Color Alpha

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Description

paint With Alpha

Demo Code

/*/*from www . j a  v a2 s  .c om*/
 * Copyright 2000-2012 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import java.awt.*;
import java.util.Map;

public class Main{
    public static GraphicsConfig paintWithAlpha(Graphics g, float alpha) {
        assert 0.0f <= alpha && alpha <= 1.0f : "alpha should be in range 0.0f .. 1.0f";
        final GraphicsConfig config = new GraphicsConfig(g);
        final Graphics2D g2 = (Graphics2D) g;
        g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
                alpha));
        return config;
    }
}

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