/*
* Copyright (c) 2009-2012 jMonkeyEngine
* All rights reserved.
*
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* 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
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package jme3tools.converters;
import com.jme3.math.FastMath;
import com.jme3.texture.Image;
import com.jme3.texture.Image.Format;
import com.jme3.texture.plugins.AWTLoader;
import com.jme3.util.BufferUtils;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.nio.ByteBuffer;
import java.util.ArrayList;
public class MipMapGenerator {
private static BufferedImage scaleDown(BufferedImage sourceImage, int targetWidth, int targetHeight) {
int sourceWidth = sourceImage.getWidth();
int sourceHeight = sourceImage.getHeight();
BufferedImage targetImage = new BufferedImage(targetWidth, targetHeight, sourceImage.getType());
Graphics2D g = targetImage.createGraphics();
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.drawImage(sourceImage, 0, 0, targetWidth, targetHeight, 0, 0, sourceWidth, sourceHeight, null);
g.dispose();
return targetImage;
}
public static void resizeToPowerOf2(Image image){
BufferedImage original = ImageToAwt.convert(image, false, true, 0);
int potWidth = FastMath.nearestPowerOfTwo(image.getWidth());
int potHeight = FastMath.nearestPowerOfTwo(image.getHeight());
int potSize = Math.max(potWidth, potHeight);
BufferedImage scaled = scaleDown(original, potSize, potSize);
AWTLoader loader = new AWTLoader();
Image output = loader.load(scaled, false);
image.setWidth(potSize);
image.setHeight(potSize);
image.setDepth(0);
image.setData(output.getData(0));
image.setFormat(output.getFormat());
image.setMipMapSizes(null);
}
public static void generateMipMaps(Image image){
BufferedImage original = ImageToAwt.convert(image, false, true, 0);
int width = original.getWidth();
int height = original.getHeight();
int level = 0;
BufferedImage current = original;
AWTLoader loader = new AWTLoader();
ArrayList<ByteBuffer> output = new ArrayList<ByteBuffer>();
int totalSize = 0;
Format format = null;
while (height >= 1 || width >= 1){
Image converted = loader.load(current, false);
format = converted.getFormat();
output.add(converted.getData(0));
totalSize += converted.getData(0).capacity();
if(height == 1 || width == 1) {
break;
}
level++;
height /= 2;
width /= 2;
current = scaleDown(current, width, height);
}
ByteBuffer combinedData = BufferUtils.createByteBuffer(totalSize);
int[] mipSizes = new int[output.size()];
for (int i = 0; i < output.size(); i++){
ByteBuffer data = output.get(i);
data.clear();
combinedData.put(data);
mipSizes[i] = data.capacity();
}
combinedData.flip();
// insert mip data into image
image.setData(0, combinedData);
image.setMipMapSizes(mipSizes);
image.setFormat(format);
}
}