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package training.util;
/**
* Holds structure used to mapped the raw pixels data.
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @author Donald MacDonald
* <a href="mailto:donald@lifesci.dundee.ac.uk">donald@lifesci.dundee.ac.uk</a>
* @since Beta4.3.2
*/
public class Plane2D
{
/** The number of bytes per pixel. */
private int bytesPerPixel;
/** The number of timepoint along the x-axis. */
private int sizeX;
/** The original array. */
private ReadOnlyByteArray data;
/** Strategy used to transform original data. */
private BytesConverter strategy;
/** The converted raw data. */
private double[][] mappedData;
/**
* Determines the offset value.
*
* @param x The x-coordinate.
* @param y The y-coordinate.
* @return See above.
*/
private int calculateOffset(int x, int y)
{
return bytesPerPixel*(sizeX*y+x);
}
/**
* Converts the raw data.
*
* @param sizeY The number of pixels along the y-axis.
*/
private void mappedData(int sizeY)
{
mappedData = new double[sizeX][sizeY];
int offset;
for (int x = 0; x < sizeX; x++) {
for (int y = 0; y < sizeY; y++) {
offset = calculateOffset(x, y);
mappedData[x][y] = strategy.pack(data, offset, bytesPerPixel);
}
}
}
/**
* Creates a new instance.
*
* @param data The array of byte.
* @param sizeX The number of pixels along the x-axis.
* @param sizeY The number of pixels along the y-axis.
* @param bytesPerPixel The number of bytes per pixel.
* @param strategy Strategy to transform pixel.
*/
public Plane2D(ReadOnlyByteArray data, int sizeX, int sizeY,
int bytesPerPixel,
BytesConverter strategy)
{
this.bytesPerPixel = bytesPerPixel;
this.data = data;
this.strategy = strategy;
this.sizeX = sizeX;
mappedData(sizeY);
}
/**
* Returns the pixels value at the point specified by the x-coordinate
* and y-coordinate.
*
* @param x The x-coordinate.
* @param y The y-coordinate.
* @return See above.
*/
public double getPixelValue(int x, int y) { return mappedData[x][y]; }
}