Java BufferedImage Rotate rotateByRightAngle(BufferedImage source, int degrees)

Description

Rotates given image by given degrees which should be a multiple of 90

License

Apache License

Parameter

Parameter	Description
source	image to be rotated
degrees	the angle by which to rotate, should be a multiple of 90

Return

the rotated image

Declaration

public static BufferedImage rotateByRightAngle(BufferedImage source, int degrees) 

Method Source Code

//package com.java2s;
/*//from  w  w w .  j av a2 s.c  o m
 * Copyright (C) 2013 The Android Open Source Project
 *
 * 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.image.BufferedImage;

public class Main {
    /**
     * Rotates given image by given degrees which should be a multiple of 90
     * @param source image to be rotated
     * @param degrees the angle by which to rotate, should be a multiple of 90
     * @return the rotated image
     */
    public static BufferedImage rotateByRightAngle(BufferedImage source, int degrees) {
        assert degrees % 90 == 0;
        degrees = degrees % 360;

        int w = source.getWidth();
        int h = source.getHeight();
        int w1, h1;
        switch (degrees) {
        case 90:
        case 270:
            w1 = h;
            h1 = w;
            break;
        default:
            w1 = w;
            h1 = h;
        }
        BufferedImage rotated = new BufferedImage(w1, h1, source.getType());

        for (int x = 0; x < w; x++) {
            for (int y = 0; y < h; y++) {
                int v = source.getRGB(x, y);
                int x1, y1;
                switch (degrees) {
                case 90:
                    x1 = h - y - 1;
                    y1 = x;
                    break;
                case 180:
                    x1 = w - x - 1;
                    y1 = h - y - 1;
                    break;
                case 270:
                    x1 = y;
                    y1 = w - x - 1;
                    break;
                default:
                    x1 = x;
                    y1 = y;
                    break;
                }

                rotated.setRGB(x1, y1, v);
            }
        }

        return rotated;
    }
}

Related

1. rotate90(BufferedImage bi)
2. rotate90(BufferedImage img, boolean left)
3. rotate90ToRight(BufferedImage inputImage)
4. rotateAndFlipSwappingRowsAndColumns(BufferedImage srcImage)
5. rotateBufferedImage(BufferedImage bufferedImage, double angle)
6. rotateFortyFiveClockwise(BufferedImage img)
7. rotateImage(BufferedImage image, double angle)
8. rotateImage(BufferedImage image, double angle)
9. rotateImage(BufferedImage image, double radians)