private void copyStx(RasterDataNode sourceRaster, RasterDataNode targetRaster) {
final Stx sourceStx = sourceRaster.getStx();
final Histogram sourceHistogram = sourceStx.getHistogram();
final Histogram targetHistogram =
new Histogram(
sourceStx.getHistogramBinCount(),
sourceHistogram.getLowValue(0),
sourceHistogram.getHighValue(0),
1);
System.arraycopy(
sourceHistogram.getBins(0),
0,
targetHistogram.getBins(0),
0,
sourceStx.getHistogramBinCount());
final Stx targetStx =
new Stx(
sourceStx.getMinimum(),
sourceStx.getMaximum(),
sourceStx.getMean(),
sourceStx.getStandardDeviation(),
sourceStx.getCoefficientOfVariation(),
sourceStx.getEquivalentNumberOfLooks(),
sourceStx.isLogHistogram(),
sourceStx.isIntHistogram(),
targetHistogram,
sourceStx.getResolutionLevel());
targetRaster.setStx(targetStx);
}
private static void copyData(
ProductData sourceBuffer,
int sourcePos,
ProductData destBuffer,
int destPos,
int destLength) {
System.arraycopy(
sourceBuffer.getElems(), sourcePos, destBuffer.getElems(), destPos, destLength);
}
@Override
public synchronized void readBandData(
Band destBand,
int sourceOffsetX,
int sourceOffsetY,
int sourceWidth,
int sourceHeight,
int sourceStepX,
int sourceStepY,
ProductData destBuffer,
ProgressMonitor pm)
throws IOException, InvalidRangeException {
final Variable variable = variableMap.get(destBand);
DataType prodtype = variable.getDataType();
float[] fbuffer;
short[] sbuffer;
int[] ibuffer;
byte[] bbuffer;
Object buffer;
if (prodtype == DataType.FLOAT) {
fbuffer = (float[]) destBuffer.getElems();
Arrays.fill(fbuffer, Float.NaN);
buffer = fbuffer;
} else if (prodtype == DataType.SHORT) {
sbuffer = (short[]) destBuffer.getElems();
Arrays.fill(sbuffer, (short) -999);
buffer = sbuffer;
} else if (prodtype == DataType.BYTE) {
bbuffer = (byte[]) destBuffer.getElems();
Arrays.fill(bbuffer, (byte) 255);
buffer = bbuffer;
} else {
ibuffer = (int[]) destBuffer.getElems();
Arrays.fill(ibuffer, -999);
buffer = ibuffer;
}
if (rowInfo == null) {
rowInfo = createRowInfos();
}
final int height = sceneHeight;
final int width = sceneWidth;
final ISINGrid grid = this.grid;
// loop over lines
try {
int[] lineOffsets = new int[1];
int[] lineLengths = new int[1];
int[] stride = new int[1];
stride[0] = 1;
// for (int y = sourceOffsetY; y < sourceOffsetY + sourceHeight; y++) {
for (int y = sourceOffsetY; y < sourceOffsetY + sourceHeight; y += sourceStepY) {
if (pm.isCanceled()) {
break;
}
final int rowIndex = (height - 1) - y;
final RowInfo rowInfo = this.rowInfo[rowIndex];
if (rowInfo != null) {
final int lineOffset = rowInfo.offset;
final int lineLength = rowInfo.length;
lineOffsets[0] = lineOffset;
lineLengths[0] = lineLength;
final Object bindata;
synchronized (ncFile) {
bindata = variable.read().section(lineOffsets, lineLengths, stride).copyTo1DJavaArray();
}
int lineIndex0 = 0;
for (int x = sourceOffsetX; x < sourceOffsetX + sourceWidth; x++) {
final double lon = x * 360.0 / width;
final int binIndex = grid.getBinIndex(rowIndex, lon);
int lineIndex = -1;
for (int i = lineIndex0; i < lineLength; i++) {
int binidx = bins[lineOffset + i];
if (binidx >= binIndex) {
if (binidx == binIndex) {
lineIndex = i;
}
lineIndex0 = i;
break;
}
}
if (lineIndex >= 0) {
final int rasterIndex = sourceWidth * (y - sourceOffsetY) + (x - sourceOffsetX);
System.arraycopy(bindata, lineIndex, buffer, rasterIndex, 1);
}
}
pm.worked(1);
}
}
} finally {
pm.done();
}
}
