/*
* PromotionRGB24
*
* Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006 Marco Schmidt.
* All rights reserved.
*/
package net.sourceforge.jiu.color.promotion;
import net.sourceforge.jiu.data.BilevelImage;
import net.sourceforge.jiu.data.Gray8Image;
import net.sourceforge.jiu.data.MemoryRGB24Image;
import net.sourceforge.jiu.data.Palette;
import net.sourceforge.jiu.data.Paletted8Image;
import net.sourceforge.jiu.data.PixelImage;
import net.sourceforge.jiu.data.RGB24Image;
import net.sourceforge.jiu.data.RGBIndex;
import net.sourceforge.jiu.ops.ImageToImageOperation;
import net.sourceforge.jiu.ops.MissingParameterException;
import net.sourceforge.jiu.ops.WrongParameterException;
/**
* Converts several image types to RGB.
* Promoting is a lossless operation that will only lead to an output image
* that holds the same image in a way that demands more memory.
* <p>
* If you give an image implementing RGB24Image to this operation, a
* WrongParameterException will be thrown.
* This operation could also return the input image, but this might lead
* to the wrong impression that a copy of the input was produced which
* can be modified without changing the original.
*
* @author Marco Schmidt
*/
public class PromotionRGB24 extends ImageToImageOperation
{
private void prepare(PixelImage in) throws
MissingParameterException,
WrongParameterException
{
if (in == null)
{
throw new MissingParameterException("Missing input image.");
}
if (!
(
(in instanceof BilevelImage) ||
(in instanceof Paletted8Image) ||
(in instanceof Gray8Image)
)
)
{
throw new WrongParameterException("Unsupported input image type: " + in.getClass().getName());
}
PixelImage out = getOutputImage();
if (out == null)
{
setOutputImage(new MemoryRGB24Image(in.getWidth(), in.getHeight()));
}
else
{
if (!(out instanceof RGB24Image))
{
throw new WrongParameterException("Specified output image type must be of class RGB24Image; got " + in.getClass().getName());
}
if (in.getWidth() != out.getWidth())
{
throw new WrongParameterException("Specified output image must have same width as input image.");
}
if (in.getHeight() != out.getHeight())
{
throw new WrongParameterException("Specified output image must have same height as input image.");
}
}
}
private void process(BilevelImage in, RGB24Image out)
{
final int HEIGHT = in.getHeight();
final byte MAX = (byte)255;
final byte MIN = (byte)0;
for (int y = 0; y < HEIGHT; y++)
{
for (int x = 0; x < in.getWidth(); x++)
{
if (in.isBlack(x, y))
{
out.putByteSample(RGBIndex.INDEX_RED, x, y, MIN);
out.putByteSample(RGBIndex.INDEX_GREEN, x, y, MIN);
out.putByteSample(RGBIndex.INDEX_BLUE, x, y, MIN);
}
else
{
out.putByteSample(RGBIndex.INDEX_RED, x, y, MAX);
out.putByteSample(RGBIndex.INDEX_GREEN, x, y, MAX);
out.putByteSample(RGBIndex.INDEX_BLUE, x, y, MAX);
}
}
setProgress(y, HEIGHT);
}
}
private void process(Paletted8Image in, RGB24Image out)
{
final int WIDTH = in.getWidth();
final int HEIGHT = in.getHeight();
final Palette PAL = in.getPalette();
for (int y = 0; y < HEIGHT; y++)
{
for (int x = 0; x < WIDTH; x++)
{
int value = in.getSample(0, x, y);
out.putSample(RGBIndex.INDEX_RED, x, y, PAL.getSample(RGBIndex.INDEX_RED, value));
out.putSample(RGBIndex.INDEX_GREEN, x, y, PAL.getSample(RGBIndex.INDEX_GREEN, value));
out.putSample(RGBIndex.INDEX_BLUE, x, y, PAL.getSample(RGBIndex.INDEX_BLUE, value));
}
setProgress(y, HEIGHT);
}
}
private void process(Gray8Image in, RGB24Image out)
{
final int WIDTH = in.getWidth();
final int HEIGHT = in.getHeight();
for (int y = 0; y < HEIGHT; y++)
{
for (int x = 0; x < WIDTH; x++)
{
int value = in.getSample(0, x, y);
out.putSample(RGBIndex.INDEX_RED, x, y, value);
out.putSample(RGBIndex.INDEX_GREEN, x, y, value);
out.putSample(RGBIndex.INDEX_BLUE, x, y, value);
}
setProgress(y, HEIGHT);
}
}
public void process() throws
MissingParameterException,
WrongParameterException
{
PixelImage in = getInputImage();
prepare(in);
RGB24Image out = (RGB24Image)getOutputImage();
if (in instanceof BilevelImage)
{
process((BilevelImage)in, out);
}
else
if (in instanceof Gray8Image)
{
process((Gray8Image)in, out);
}
else
if (in instanceof Paletted8Image)
{
process((Paletted8Image)in, out);
}
}
}