/*
 * Copyright (c) 2009-2012 jMonkeyEngine
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.jme3.post.filters;

import com.jme3.asset.AssetManager;
import com.jme3.material.Material;
import com.jme3.post.Filter;
import com.jme3.renderer.RenderManager;
import com.jme3.renderer.ViewPort;

/**
 *
 * @author Phate666
 * @version 1.0 initial version
 * @deprecated use the Gama Correction setting instead.
 */
@Deprecated
public class GammaCorrectionFilter extends Filter {

    private float gamma = 2.2f;   

    public GammaCorrectionFilter() {
        super("GammaCorrectionFilter");
    }

    public GammaCorrectionFilter(float gamma) {
        this();
        this.setGamma(gamma);
    }

    @Override
    protected Material getMaterial() {
        return material;
    }

    @Override
    protected void initFilter(AssetManager manager,
            RenderManager renderManager, ViewPort vp, int w, int h) {
        material = new Material(manager, "Common/MatDefs/Post/GammaCorrection.j3md");
        material.setFloat("InvGamma", 1.0f/gamma);        
    }

    public float getGamma() {
        return gamma;
    }

    /**
     * set to 0.0 to disable gamma correction
     *
     * @param gamma
     */
    public final void setGamma(float gamma) {
        if(gamma<=0){
            throw new IllegalArgumentException("Gamma value can't be below or equal 0.");
        }
        if (material != null) {
            material.setFloat("InvGamma",1.0f/ gamma);
        }
        this.gamma = gamma;
    }
}