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/*
* Created on Jun 1, 2005
*/
package com.lti.civil.awt;
import java.awt.Point;
import java.awt.Transparency;
import java.awt.color.ColorSpace;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.ComponentColorModel;
import java.awt.image.ComponentSampleModel;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import com.lti.civil.VideoFormat;
/**
*
* @author Ken Larson
*/
public class AWTImageConverter
{
// adapted from FMJ's BufferToImage class.
public static BufferedImage toBufferedImage(final com.lti.civil.Image image)
{
// TODO: if it is a BufferedImageImage, we should just cast and return the wrapped image.
final VideoFormat format = image.getFormat();
final int w = format.getWidth();
final int h = format.getHeight();
byte[] bytes = image.getBytes();
if (format.getFormatType() == com.lti.civil.VideoFormat.RGB24)
{
// this is much faster than iterating through the pixels.
// if we create a writable raster and then construct a buffered image,
// no new array is created and no data is copied.
// TODO: optimize other cases.
final DataBufferByte db = new DataBufferByte(new byte[][] {bytes}, bytes.length);
final ComponentSampleModel sm = new ComponentSampleModel(DataBuffer.TYPE_BYTE, w, h, 3, w * 3, new int[] {2, 1, 0});
final WritableRaster r = Raster.createWritableRaster(sm, db, new Point(0, 0));
// construction borrowed from BufferedImage constructor, for BufferedImage.TYPE_3BYTE_BGR
final ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
int[] nBits = {8, 8, 8};
//int[] bOffs = {2, 1, 0};
final ColorModel colorModel = new ComponentColorModel(cs, nBits, false, false,
Transparency.OPAQUE,
DataBuffer.TYPE_BYTE);
final BufferedImage bi = new BufferedImage(colorModel, r, false, null);
return bi;
}
else if (format.getFormatType() == com.lti.civil.VideoFormat.RGB32)
{
final DataBufferByte db = new DataBufferByte(new byte[][] {bytes}, bytes.length);
final ComponentSampleModel sm = new ComponentSampleModel(DataBuffer.TYPE_BYTE, w, h, 4, w * 4, new int[] {2, 1, 0, 3});
final WritableRaster r = Raster.createWritableRaster(sm, db, new Point(0, 0));
// construction borrowed from BufferedImage constructor, for BufferedImage.TYPE_4BYTE_ABGR
final ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
int[] nBits = {8, 8, 8, 8};
//int[] bOffs = {3, 2, 1, 0};
final ColorModel colorModel = new ComponentColorModel(cs, nBits, true, false,
Transparency.TRANSLUCENT,
DataBuffer.TYPE_BYTE);
final BufferedImage bi = new BufferedImage(colorModel, r, false, null);
return bi;
}
else
{ throw new IllegalArgumentException();
}
}
}
