/*
* Rotate90Left
*
* Copyright (c) 2001, 2002, 2003 Marco Schmidt.
* All rights reserved.
*/
package net.sourceforge.jiu.geometry;
import net.sourceforge.jiu.data.PixelImage;
import net.sourceforge.jiu.data.IntegerImage;
import net.sourceforge.jiu.ops.ImageToImageOperation;
import net.sourceforge.jiu.ops.MissingParameterException;
import net.sourceforge.jiu.ops.WrongParameterException;
/**
* Rotates images by 90 degrees counter-clockwise (to the left).
* Input image must implement {@link net.sourceforge.jiu.data.IntegerImage}.
* <h3>Usage example</h3>
* <pre>
* Rotate90Left rotate = new Rotate90Left();
* rotate.setInputImage(image);
* rotate.process();
* PixelImage rotatedImage = rotate.getOutputImage();
* </pre>
* @author Marco Schmidt
*/
public class Rotate90Left extends ImageToImageOperation
{
private void process(IntegerImage in, IntegerImage out)
{
final int WIDTH = in.getWidth();
final int HEIGHT = in.getHeight();
if (out == null)
{
out = (IntegerImage)in.createCompatibleImage(HEIGHT, WIDTH);
setOutputImage(out);
}
int totalItems = in.getNumChannels() * HEIGHT;
int processedItems = 0;
for (int c = 0; c < in.getNumChannels(); c++)
{
for (int y = 0; y < HEIGHT; y++)
{
for (int x = 0; x < WIDTH; x++)
{
out.putSample(c, y, (WIDTH - x - 1), in.getSample(c, x, y));
}
setProgress(processedItems++, totalItems);
}
}
}
public void process() throws
MissingParameterException,
WrongParameterException
{
ensureInputImageIsAvailable();
PixelImage in = getInputImage();
ensureOutputImageResolution(in.getHeight(), in.getWidth());
if (in instanceof IntegerImage)
{
process((IntegerImage)in, (IntegerImage)getOutputImage());
}
else
{
throw new WrongParameterException("Input image must implement IntegerImage.");
}
}
}