Java BufferedImage Operation reorientImage(BufferedImage image, boolean yAxisFlipNeeded, int cwRotationNeeded)

Description

Flipping (Mirroring) is performed BEFORE Rotating the image.

License

Apache License

Declaration

public static BufferedImage reorientImage(BufferedImage image, boolean yAxisFlipNeeded, int cwRotationNeeded) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.awt.*;
import java.awt.image.BufferedImage;

public class Main {
    /**// ww w .  jav  a2  s. co  m
     * Flipping (Mirroring) is performed BEFORE Rotating the image. Example: Flipping the image over the y Axis, and then rotating it 90 degrees CW
     * is not the same as rotating the image 90 degrees CW and then flipping it over the y Axis.
     */
    public static BufferedImage reorientImage(BufferedImage image, boolean yAxisFlipNeeded, int cwRotationNeeded) {
        //If angle greater than 360 is entered, reduce this angle.
        cwRotationNeeded = cwRotationNeeded % 360;

        BufferedImage orientedImage = image;
        if (!yAxisFlipNeeded && cwRotationNeeded == 0) {
            //EXIF Orientation 1.
            return image;
        } else if (yAxisFlipNeeded && cwRotationNeeded == 0) {
            //EXIF Orientation 2.
            orientedImage = flipImageHorizontally(image);
        } else if (!yAxisFlipNeeded && cwRotationNeeded == 180) {
            //EXIF Orientation 3.
            orientedImage = rotateImage(image, 180);
        } else if (yAxisFlipNeeded && cwRotationNeeded == 180) {
            //EXIF Orientation 4.
            orientedImage = flipImageVertically(image);
        } else if (yAxisFlipNeeded && cwRotationNeeded == 270) {
            //EXIF Orientation 5.
            orientedImage = flipImageVertically(image);
            orientedImage = rotateImage(orientedImage, 90);
        } else if (!yAxisFlipNeeded && cwRotationNeeded == 90) {
            //EXIF Orientation 6.
            orientedImage = rotateImage(image, 90);
        } else if (yAxisFlipNeeded && cwRotationNeeded == 90) {
            //EXIF Orientation 7.
            orientedImage = flipImageVertically(image);
            orientedImage = rotateImage(orientedImage, 270);
        } else if (!yAxisFlipNeeded && cwRotationNeeded == 270) {
            //EXIF Orientation 8.
            orientedImage = rotateImage(image, 270);
        } else {
            return image;
        }

        return orientedImage;
    }

    public static BufferedImage flipImageHorizontally(BufferedImage image) {
        int width = image.getWidth();
        int height = image.getHeight();
        int type = thumbnailType(image);
        BufferedImage result = new BufferedImage(width, height, type);
        Graphics2D g = result.createGraphics();
        g.drawImage(image, width, 0, 0, height, 0, 0, width, height, null);
        g.dispose();
        return result;
    }

    public static BufferedImage rotateImage(BufferedImage image, int cwRotationNeeded) {
        double angle = Math.toRadians(cwRotationNeeded);
        int type = thumbnailType(image);
        double sin = Math.abs(Math.sin(angle));
        double cos = Math.abs(Math.cos(angle));
        int width = image.getWidth();
        int height = image.getHeight();
        int newWidth = (int) Math.floor(width * cos + height * sin);
        int newHeight = (int) Math.floor(height * cos + width * sin);
        BufferedImage result = new BufferedImage(newWidth, newHeight, type);
        Graphics2D g = result.createGraphics();
        g.translate((newWidth - width) / 2, (newHeight - height) / 2);
        g.rotate(angle, width / 2, height / 2);
        g.drawRenderedImage(image, null);
        g.dispose();
        return result;
    }

    public static BufferedImage flipImageVertically(BufferedImage image) {
        int width = image.getWidth();
        int height = image.getHeight();
        int type = thumbnailType(image);
        BufferedImage result = new BufferedImage(width, height, type);
        Graphics2D g = result.createGraphics();
        g.drawImage(image, 0, height, width, 0, 0, 0, width, height, null);
        g.dispose();
        return result;
    }

    public static int thumbnailType(BufferedImage image) {
        if (image.getColorModel().getNumComponents() > 3) {
            return BufferedImage.TYPE_4BYTE_ABGR;
        } else if (image.getColorModel().getNumColorComponents() == 3) {
            return BufferedImage.TYPE_3BYTE_BGR;
        }
        return BufferedImage.TYPE_INT_RGB;
    }
}

Related

1. performRescaleOperation(BufferedImage image, float scale, float offset)
2. prepareModel(BufferedImage model)
3. recolor(BufferedImage img, int newColor)
4. recolor(BufferedImage src, Color sc)
5. recombine(BufferedImage[][] blocks)
6. repairImage(final BufferedImage bfi, final List order)
7. resampleImage(BufferedImage image, int height)
8. resampleWithAffineTransformOp(BufferedImage srcImage, double sx, double sy)
9. revertBlackAndWhite(BufferedImage img)