Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.awt.Color;
import java.awt.Graphics;

import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;

import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;

import java.util.Hashtable;

public class Main {
    private static ColorModel glAlphaColorModel, glColorModel;

    private static ByteBuffer convertImageData(BufferedImage bufferedImage) {
        ByteBuffer imageBuffer;
        WritableRaster raster;
        BufferedImage texImage;

        // for a texture
        if (bufferedImage.getColorModel().hasAlpha()) {
            raster = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, bufferedImage.getWidth(),
                    bufferedImage.getHeight(), 4, null);
            texImage = new BufferedImage(glAlphaColorModel, raster, false, new Hashtable<Object, Object>());
        } else {
            raster = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE, bufferedImage.getWidth(),
                    bufferedImage.getHeight(), 3, null);
            texImage = new BufferedImage(glColorModel, raster, false, new Hashtable<Object, Object>());
        }

        // copy the source image into the produced image
        Graphics g = texImage.getGraphics();
        g.setColor(new Color(0f, 0f, 0f, 0f));
        g.fillRect(0, 0, bufferedImage.getWidth(), bufferedImage.getHeight());
        g.drawImage(bufferedImage, 0, 0, null);

        // build a byte buffer from the temporary image
        // that be used by OpenGL to produce a texture.
        byte[] data = ((DataBufferByte) bufferedImage.getRaster().getDataBuffer()).getData();

        imageBuffer = ByteBuffer.allocateDirect(data.length);
        imageBuffer.order(ByteOrder.nativeOrder());
        imageBuffer.put(data, 0, data.length);
        imageBuffer.flip();

        return imageBuffer;
    }
}