/*
 * 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.scene.plugins.blender.textures.blending;

import java.util.logging.Level;
import java.util.logging.Logger;

import com.jme3.scene.plugins.blender.BlenderContext;
import com.jme3.texture.Image;
import com.jme3.texture.Image.Format;

/**
 * This class creates the texture blending class depending on the texture type.
 * 
 * @author Marcin Roguski (Kaelthas)
 */
public class TextureBlenderFactory {
    private static final Logger LOGGER = Logger.getLogger(TextureBlenderFactory.class.getName());

    /**
     * A blender that does not change the image. Used for none supported image types.
     */
    private static final TextureBlender NON_CHANGING_BLENDER = new TextureBlender() {
        @Override
        public Image blend(Image image, Image baseImage, BlenderContext blenderContext) {
            return image;
        }

        @Override
        public void copyBlendingData(TextureBlender textureBlender) { }
    };
    
    /**
     * This method creates the blending class.
     * 
     * @param format
     *            the texture format
     * @return texture blending class
     */
    public static TextureBlender createTextureBlender(Format format, int flag, boolean negate, int blendType, float[] materialColor, float[] color, float colfac) {
        switch (format) {
            case Luminance8:
            case Luminance8Alpha8:
            case Luminance16F:
            case Luminance16FAlpha16F:
            case Luminance32F:
                return new TextureBlenderLuminance(flag, negate, blendType, materialColor, color, colfac);
            case RGBA8:
            case ABGR8:
            case BGR8:
            case RGB8:
            case RGB111110F:
            case RGB16F:
            case RGB16F_to_RGB111110F:
            case RGB16F_to_RGB9E5:
            case RGB32F:
            case RGB565:
            case RGB5A1:
            case RGB9E5:
            case RGBA16F:
            case RGBA32F:
                return new TextureBlenderAWT(flag, negate, blendType, materialColor, color, colfac);
            case DXT1:
            case DXT1A:
            case DXT3:
            case DXT5:
                return new TextureBlenderDDS(flag, negate, blendType, materialColor, color, colfac);
            default:
                LOGGER.log(Level.WARNING, "Image type not yet supported for blending: {0}. Returning a blender that does not change the texture.", format);
                return NON_CHANGING_BLENDER;
        }
    }

    /**
     * This method changes the image format in the texture blender.
     * 
     * @param format
     *            the new image format
     * @param textureBlender
     *            the texture blender that will be altered
     * @return altered texture blender
     */
    public static TextureBlender alterTextureType(Format format, TextureBlender textureBlender) {
        TextureBlender result = TextureBlenderFactory.createTextureBlender(format, 0, false, 0, null, null, 0);
        result.copyBlendingData(textureBlender);
        return result;
    }
}