nom.tam.image.compression.tile.mask.NullPixelMaskRestorer Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of nom-tam-fits Show documentation
Java library for reading and writing FITS files. FITS, the Flexible Image Transport System, is the format commonly used in the archiving and transport of astronomical data.
There is a newer version: 1.20.2
Show newest version
package nom.tam.image.compression.tile.mask;

/*
 * #%L
 * nom.tam FITS library
 * %%
 * Copyright (C) 1996 - 2016 nom-tam-fits
 * %%
 * This is free and unencumbered software released into the public domain.
 * 
 * Anyone is free to copy, modify, publish, use, compile, sell, or
 * distribute this software, either in source code form or as a compiled
 * binary, for any purpose, commercial or non-commercial, and by any
 * means.
 * 
 * In jurisdictions that recognize copyright laws, the author or authors
 * of this software dedicate any and all copyright interest in the
 * software to the public domain. We make this dedication for the benefit
 * of the public at large and to the detriment of our heirs and
 * successors. We intend this dedication to be an overt act of
 * relinquishment in perpetuity of all present and future rights to this
 * software under copyright law.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 * #L%
 */

import java.nio.ByteBuffer;
import java.nio.DoubleBuffer;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.nio.LongBuffer;
import java.nio.ShortBuffer;

import nom.tam.fits.compression.algorithm.api.ICompressorControl;
import nom.tam.image.tile.operation.buffer.TileBuffer;
import nom.tam.util.type.PrimitiveTypes;

/**
 * restore the null pixel values of an image.
 */
public class NullPixelMaskRestorer extends AbstractNullPixelMask {

    public NullPixelMaskRestorer(TileBuffer tileBuffer, int tileIndex, long nullValue, ICompressorControl compressorControl) {
        super(tileBuffer, tileIndex, nullValue, compressorControl);
    }

    public void restoreNulls() {
        // if the mask is not present the tile contains no null pixels.
        if (getMask() != null) {
            ByteBuffer decompressed = ByteBuffer.allocate(getTileBuffer().getPixelSize());
            getCompressorControl().decompress(getMask(), decompressed, getCompressorControl().option());
            setMask(decompressed);
            if (getTileBuffer().getBaseType().is(PrimitiveTypes.DOUBLE)) {
                restoreNullDoubles();
            } else if (getTileBuffer().getBaseType().is(PrimitiveTypes.FLOAT)) {
                restoreNullFloats();
            } else if (getTileBuffer().getBaseType().is(PrimitiveTypes.LONG)) {
                restoreNullLongs();
            } else if (getTileBuffer().getBaseType().is(PrimitiveTypes.INT)) {
                restoreNullInts();
            } else if (getTileBuffer().getBaseType().is(PrimitiveTypes.SHORT)) {
                restoreNullShorts();
            } else if (getTileBuffer().getBaseType().is(PrimitiveTypes.BYTE)) {
                restoreNullBytes();
            }
        }
    }

    private void restoreNullBytes() {
        ByteBuffer buffer = (ByteBuffer) getTileBuffer().getBuffer();
        ByteBuffer nullMask = initializedMask(buffer.remaining());
        byte nullValue = (byte) getNullValue();
        for (int index = 0; index < nullMask.capacity(); index++) {
            if (nullMask.get(index) == NULL_INDICATOR) {
                buffer.put(index, nullValue);
            }
        }
    }

    private void restoreNullDoubles() {
        DoubleBuffer buffer = (DoubleBuffer) getTileBuffer().getBuffer();
        ByteBuffer nullMask = initializedMask(buffer.remaining());
        for (int index = 0; index < nullMask.capacity(); index++) {
            if (nullMask.get(index) == NULL_INDICATOR) {
                buffer.put(index, Double.NaN);
            }
        }
    }

    private void restoreNullFloats() {
        FloatBuffer buffer = (FloatBuffer) getTileBuffer().getBuffer();
        ByteBuffer nullMask = initializedMask(buffer.remaining());
        for (int index = 0; index < nullMask.capacity(); index++) {
            if (nullMask.get(index) == NULL_INDICATOR) {
                buffer.put(index, Float.NaN);
            }
        }
    }

    private void restoreNullInts() {
        IntBuffer buffer = (IntBuffer) getTileBuffer().getBuffer();
        ByteBuffer nullMask = initializedMask(buffer.remaining());
        int nullValue = (int) getNullValue();
        for (int index = 0; index < nullMask.capacity(); index++) {
            if (nullMask.get(index) == NULL_INDICATOR) {
                buffer.put(index, nullValue);
            }
        }
    }

    private void restoreNullLongs() {
        LongBuffer buffer = (LongBuffer) getTileBuffer().getBuffer();
        ByteBuffer nullMask = initializedMask(buffer.remaining());
        long nullValue = getNullValue();
        for (int index = 0; index < nullMask.capacity(); index++) {
            if (nullMask.get(index) == NULL_INDICATOR) {
                buffer.put(index, nullValue);
            }
        }
    }

    private void restoreNullShorts() {
        ShortBuffer buffer = (ShortBuffer) getTileBuffer().getBuffer();
        ByteBuffer nullMask = initializedMask(buffer.remaining());
        short nullValue = (short) getNullValue();
        for (int index = 0; index < nullMask.capacity(); index++) {
            if (nullMask.get(index) == NULL_INDICATOR) {
                buffer.put(index, nullValue);
            }
        }
    }
}