// Catalano Imaging Library
// The Catalano Framework
//
// Copyright © Diego Catalano, 2012-2016
// diego.catalano at live.com
//
//    This library is free software; you can redistribute it and/or
//    modify it under the terms of the GNU Lesser General Public
//    License as published by the Free Software Foundation; either
//    version 2.1 of the License, or (at your option) any later version.
//
//    This library 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
//    Lesser General Public License for more details.
//
//    You should have received a copy of the GNU Lesser General Public
//    License along with this library; if not, write to the Free Software
//    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
//

package Catalano.Imaging.Filters.Artistic;

import Catalano.Imaging.FastBitmap;
import Catalano.Imaging.Filters.Desaturation;
import Catalano.Imaging.Filters.GaussianBoxBlur;
import Catalano.Imaging.Filters.Invert;
import Catalano.Imaging.IApplyInPlace;

/**
 * Fake HDR.
 * Simulate HDR (High Dynamic Range) from single image.
 * @author Diego Catalano
 */
public class FakeHDR implements IApplyInPlace{
    
    private double desaturation = 0;
    private int sigma = 40;
    private double p = 0.62;

    /**
     * Get desaturation value.
     * @return Desaturation value.
     */
    public double getDesaturation() {
        return desaturation;
    }

    /**
     * Set desaturation value.
     * @param desaturation Desaturation [0..1].
     */
    public void setDesaturation(double desaturation) {
        this.desaturation = desaturation;
    }

    /**
     * Get sigma.
     * @return Sigma.
     */
    public int getSigma() {
        return sigma;
    }

    /**
     * Set sigma.
     * @param sigma Sigma.
     */
    public void setSigma(int sigma) {
        this.sigma = sigma;
    }

    /**
     * Get percentage.
     * @return Percentage.
     */
    public double getPercentage() {
        return p;
    }

    /**
     * Set percentage.
     * @param p Percentage [0..1].
     */
    public void setPercentage(double p) {
        this.p = Math.max(0, Math.min(1, p));
    }

    /**
     * Initialize a new instance of the FakeHDR class.
     */
    public FakeHDR() {}
    
    /**
     * Initialize a new instance of the FakeHDR class.
     * @param percentage Percentage [0..1].
     */
    public FakeHDR(double percentage){
        setPercentage(percentage);
    }
    
    /**
     * Initialize a new instance of the FakeHDR class.
     * @param desaturation Desaturation [0..1].
     * @param sigma Gaussian value.
     * @param percentage Percentage [0..1].
     */
    public FakeHDR(double desaturation, int sigma, double percentage){
        this.desaturation = desaturation;
        this.sigma = sigma;
        this.p = percentage;
    }

    @Override
    public void applyInPlace(FastBitmap fastBitmap) {
        
        FastBitmap layerA = new FastBitmap(fastBitmap);
        FastBitmap layerB = new FastBitmap(fastBitmap);
        
        Desaturation d = new Desaturation(desaturation);
        d.applyInPlace(layerA);
        
        Invert in = new Invert();
        in.applyInPlace(layerA);
        
        GaussianBoxBlur fgb = new GaussianBoxBlur(sigma);
        fgb.applyInPlace(layerA);
        
        Blend blend = new Blend(layerB, Blend.Algorithm.Overlay);
        blend.applyInPlace(layerA);
        
        layerB = new FastBitmap(fastBitmap);
        
        blend.setAlgorithm(Blend.Algorithm.LinearLight);
        blend.setOverlay(layerA);
        blend.applyInPlace(layerB);
        
        Opacity o = new Opacity(layerB);
        o.setPercentage(p);
        o.applyInPlace(fastBitmap);
        
    }
}