sigonasr2/jmonkeyengine
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

MipMapGenerator: add generator that uses raster

Browse Source 
The one that uses AWT will be deprecated soon
This commit is contained in:
Kirill Vainer 2015-05-02 15:28:26 -04:00
parent 55d3a5dd15
commit 682b1f5b58
1 changed files with 143 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

143
jme3-core/src/main/java/com/jme3/util/MipMapGenerator.java Normal file
View File

@ -0,0 +1,143 @@
/*
* 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.util;
import com.jme3.math.ColorRGBA;
import com.jme3.math.FastMath;
import com.jme3.texture.Image;
import com.jme3.texture.Image.Format;
import com.jme3.texture.image.ImageRaster;
import java.nio.ByteBuffer;
import java.util.ArrayList;
public class MipMapGenerator {
private MipMapGenerator() {
}
public static Image scaleImage(Image inputImage, int outputWidth, int outputHeight) {
int size = outputWidth * outputHeight * inputImage.getFormat().getBitsPerPixel() / 8;
ByteBuffer buffer = BufferUtils.createByteBuffer(size);
Image outputImage = new Image(inputImage.getFormat(),
outputWidth,
outputHeight,
buffer,
inputImage.getColorSpace());
// Perform scaling in linear colorspace for higher quality.
// However it requires a lot of pow() calls..
ImageRaster input = ImageRaster.create(inputImage, 0, 0, true);
ImageRaster output = ImageRaster.create(outputImage, 0, 0, true);
float xRatio = ((float)(input.getWidth() - 1)) / output.getWidth();
float yRatio = ((float)(input.getHeight() - 1)) / output.getHeight();
ColorRGBA outputColor = new ColorRGBA();
ColorRGBA bottomLeft = new ColorRGBA();
ColorRGBA bottomRight = new ColorRGBA();
ColorRGBA topLeft = new ColorRGBA();
ColorRGBA topRight = new ColorRGBA();
for (int y = 0; y < outputHeight; y++) {
for (int x = 0; x < outputWidth; x++) {
float x2f = x * xRatio;
float y2f = y * yRatio;
int x2 = (int)x2f;
int y2 = (int)y2f;
float xDiff = x2f - x2;
float yDiff = y2f - y2;
input.getPixel(x2, y2, bottomLeft);
input.getPixel(x2 + 1, y2, bottomRight);
input.getPixel(x2, y2 + 1, topLeft);
input.getPixel(x2 + 1, y2 + 1, topRight);
bottomLeft.multLocal( (1f - xDiff) * (1f - yDiff) );
bottomRight.multLocal( (xDiff) * (1f - yDiff) );
topLeft.multLocal( (1f - xDiff) * (yDiff) );
topRight.multLocal( (xDiff) * (yDiff) );
outputColor.set(bottomLeft).addLocal(bottomRight)
.addLocal(topLeft).addLocal(topRight);
output.setPixel(x, y, outputColor);
}
}
return outputImage;
}
public static Image resizeToPowerOf2(Image original){
int potWidth = FastMath.nearestPowerOfTwo(original.getWidth());
int potHeight = FastMath.nearestPowerOfTwo(original.getHeight());
int potSize = Math.max(potWidth, potHeight);
return scaleImage(original, potSize, potSize);
}
public static void generateMipMaps(Image image){
int width = image.getWidth();
int height = image.getHeight();
Image current = image;
ArrayList<ByteBuffer> output = new ArrayList<ByteBuffer>();
int totalSize = 0;
while (height >= 1 || width >= 1){
output.add(current.getData(0));
totalSize += current.getData(0).capacity();
if (height == 1 || width == 1) {
break;
}
height /= 2;
width /= 2;
current = scaleImage(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);
}
}