com.itextpdf.pdfocr.IImageRotationHandler Maven / Gradle / Ivy

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/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2021 iText Group NV
    Authors: iText Software.

    This program is offered under a commercial and under the AGPL license.
    For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.

    AGPL licensing:
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see .
 */
package com.itextpdf.pdfocr;

import com.itextpdf.io.image.ImageData;

/**
 * Rotation information may be stored in image metadata.
 * For OCR and adding image to document that rotation
 * should be applied to the image, so that it is actually rotated,
 * not via metadata properties.
 * Interface ia responsible for extracting rotation from metadata
 * and applying in to the image.
 */
public interface IImageRotationHandler {

    /**
     * Apply rotation to image data.
     * If image is not rotated - does nothing.
     * @param imageData to apply rotation to
     * @return rotated image if rotation flag is set or self if no rotation
     */
    public abstract ImageData applyRotation(ImageData imageData);

}