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/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2017 IDRsolutions and Contributors.
 *
 * This file is part of JPedal/JPDF2HTML5
 *
 @LICENSE@
 *
 * ---------------
 * DPIFactory.java
 * ---------------
 */
package org.jpedal.utils;

public class DPIFactory {

    //Current DPI value, Java is 72 by default
    private float dpi = 72f;

    /**
     * Corrects the image scaling to take into account the user specified DPI value
     *
     * @param scaling :: Raw scaling value before DPI is applied (DPI of 72 is default)
     * @return Corrected scaling in the form of a float
     */
    public float adjustScaling(final float scaling) {
        return scaling * (dpi / 72f);
    }

    /**
     * Corrects the image scaling to take into account the user specified DPI value
     *
     * @param scaling :: Raw scaling value before DPI is applied (DPI of 72 is default)
     * @return Corrected scaling in the form of a float
     */
    public float removeScaling(final float scaling) {
        return scaling / (dpi / 72f);
    }

    /**
     * Get the current value of the user defined DPI (default = 72)
     *
     * @return :: The current DPI value as a float
     */
    public float getDpi() {
        return dpi;
    }

    /**
     * Sets the current DPI to the input value dpi
     *
     * @param dpi :: The new dpi value expressed as a float
     */
    public void setDpi(final float dpi) {
        this.dpi = dpi;
    }
}