Beispiel #1
0
  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 {

    if (mustFlipY) {
      sourceOffsetY = destBand.getSceneRasterHeight() - (sourceOffsetY + sourceHeight);
    }
    if (mustFlipX) {
      sourceOffsetX = destBand.getSceneRasterWidth() - (sourceOffsetX + sourceWidth);
    }
    sourceOffsetY += leadLineSkip;
    start[0] = sourceOffsetY;
    start[1] = sourceOffsetX;
    stride[0] = sourceStepY;
    stride[1] = sourceStepX;
    count[0] = sourceHeight;
    count[1] = sourceWidth;
    Object buffer = destBuffer.getElems();
    Variable variable = variableMap.get(destBand);

    pm.beginTask("Reading band '" + variable.getShortName() + "'...", sourceHeight);
    try {
      Section section = new Section(start, count, stride);

      Array array;
      int[] newshape = {sourceHeight, sourceWidth};

      array = variable.read(section);
      if (array.getRank() == 3) {
        array = array.reshapeNoCopy(newshape);
      }
      Object storage;

      if (mustFlipX && !mustFlipY) {
        storage = array.flip(1).copyTo1DJavaArray();
      } else if (!mustFlipX && mustFlipY) {
        storage = array.flip(0).copyTo1DJavaArray();
      } else if (mustFlipX && mustFlipY) {
        storage = array.flip(0).flip(1).copyTo1DJavaArray();
      } else {
        storage = array.copyTo1DJavaArray();
      }

      arraycopy(storage, 0, buffer, 0, destBuffer.getNumElems());
    } finally {
      pm.done();
    }
  }
Beispiel #2
0
 private void checkBufferSize(int sourceWidth, int sourceHeight, ProductData sourceBuffer) {
   int expectedBufferSize = sourceWidth * sourceHeight;
   int actualBufferSize = sourceBuffer.getNumElems();
   Guardian.assertEquals("wrong sourceBuffer size", actualBufferSize, expectedBufferSize);
 }