protected DataRaster[] doRead(Object source, AVList params) throws java.io.IOException {
java.nio.ByteBuffer byteBuffer = this.readElevations(source);
// If the parameter list is null, or doesn't already have all the necessary metadata, then we
// copy the parameter
// list and attempt to populate the copy with any missing metadata.
if (this.validateMetadata(source, params) != null) {
// Copy the parameter list to insulate changes from the caller.
params = (params != null) ? params.copy() : new AVListImpl();
params.setValue(AVKey.FILE_SIZE, byteBuffer.capacity());
this.readWorldFiles(source, params);
}
int width = (Integer) params.getValue(AVKey.WIDTH);
int height = (Integer) params.getValue(AVKey.HEIGHT);
Sector sector = (Sector) params.getValue(AVKey.SECTOR);
// Translate the property PIXEL_TYPE to the property DATA_TYPE.
if (params.getValue(AVKey.DATA_TYPE) == null)
params.setValue(AVKey.DATA_TYPE, params.getValue(AVKey.PIXEL_TYPE));
ByteBufferRaster raster = new ByteBufferRaster(width, height, sector, byteBuffer, params);
// This code expects the string "gov.nasa.worldwind.avkey.MissingDataValue", which now
// corresponds to the
// key MISSING_DATA_REPLACEMENT.
Double missingDataValue = (Double) params.getValue(AVKey.MISSING_DATA_REPLACEMENT);
if (missingDataValue != null) raster.setTransparentValue(missingDataValue);
return new DataRaster[] {raster};
}
private void convertFeetToMeters(ByteBufferRaster raster) {
if (null == raster) {
return;
}
int width = raster.getWidth();
int height = raster.getHeight();
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
raster.setDoubleAtPosition(
y, x, raster.getDoubleAtPosition(y, x) / WWMath.METERS_TO_FEET);
}
}
}