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• 2020-04-09
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• ComponentSampleModel.java

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META-INF.modules.java.desktop.classes.java.awt.image.ComponentSampleModel Maven / Gradle / Ivy

/*
 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/* ****************************************************************
 ******************************************************************
 ******************************************************************
 *** COPYRIGHT (c) Eastman Kodak Company, 1997
 *** As  an unpublished  work pursuant to Title 17 of the United
 *** States Code.  All rights reserved.
 ******************************************************************
 ******************************************************************
 ******************************************************************/

package java.awt.image;

import java.util.Arrays;

/**
 *  This class represents image data which is stored such that each sample
 *  of a pixel occupies one data element of the DataBuffer.  It stores the
 *  N samples which make up a pixel in N separate data array elements.
 *  Different bands may be in different banks of the DataBuffer.
 *  Accessor methods are provided so that image data can be manipulated
 *  directly. This class can support different kinds of interleaving, e.g.
 *  band interleaving, scanline interleaving, and pixel interleaving.
 *  Pixel stride is the number of data array elements between two samples
 *  for the same band on the same scanline. Scanline stride is the number
 *  of data array elements between a given sample and the corresponding sample
 *  in the same column of the next scanline.  Band offsets denote the number
 *  of data array elements from the first data array element of the bank
 *  of the DataBuffer holding each band to the first sample of the band.
 *  The bands are numbered from 0 to N-1.  This class can represent image
 *  data for which each sample is an unsigned integral number which can be
 *  stored in 8, 16, or 32 bits (using {@code DataBuffer.TYPE_BYTE},
 *  {@code DataBuffer.TYPE_USHORT}, or {@code DataBuffer.TYPE_INT},
 *  respectively), data for which each sample is a signed integral number
 *  which can be stored in 16 bits (using {@code DataBuffer.TYPE_SHORT}),
 *  or data for which each sample is a signed float or double quantity
 *  (using {@code DataBuffer.TYPE_FLOAT} or
 *  {@code DataBuffer.TYPE_DOUBLE}, respectively).
 *  All samples of a given ComponentSampleModel
 *  are stored with the same precision.  All strides and offsets must be
 *  non-negative.  This class supports
 *  {@link DataBuffer#TYPE_BYTE TYPE_BYTE},
 *  {@link DataBuffer#TYPE_USHORT TYPE_USHORT},
 *  {@link DataBuffer#TYPE_SHORT TYPE_SHORT},
 *  {@link DataBuffer#TYPE_INT TYPE_INT},
 *  {@link DataBuffer#TYPE_FLOAT TYPE_FLOAT},
 *  {@link DataBuffer#TYPE_DOUBLE TYPE_DOUBLE},
 *  @see java.awt.image.PixelInterleavedSampleModel
 *  @see java.awt.image.BandedSampleModel
 */

public class ComponentSampleModel extends SampleModel
{
    /** Offsets for all bands in data array elements. */
    protected int[] bandOffsets;

    /** Index for each bank storing a band of image data. */
    protected int[] bankIndices;

    /**
     * The number of bands in this
     * {@code ComponentSampleModel}.
     */
    protected int numBands = 1;

    /**
     * The number of banks in this
     * {@code ComponentSampleModel}.
     */
    protected int numBanks = 1;

    /**
     *  Line stride (in data array elements) of the region of image
     *  data described by this ComponentSampleModel.
     */
    protected int scanlineStride;

    /** Pixel stride (in data array elements) of the region of image
     *  data described by this ComponentSampleModel.
     */
    protected int pixelStride;

    /**
     * Constructs a ComponentSampleModel with the specified parameters.
     * The number of bands will be given by the length of the bandOffsets array.
     * All bands will be stored in the first bank of the DataBuffer.
     * @param dataType  the data type for storing samples
     * @param w         the width (in pixels) of the region of
     *     image data described
     * @param h         the height (in pixels) of the region of
     *     image data described
     * @param pixelStride the pixel stride of the region of image
     *     data described
     * @param scanlineStride the line stride of the region of image
     *     data described
     * @param bandOffsets the offsets of all bands
     * @throws IllegalArgumentException if {@code w} or
     *         {@code h} is not greater than 0
     * @throws IllegalArgumentException if {@code pixelStride}
     *         is less than 0
     * @throws IllegalArgumentException if {@code scanlineStride}
     *         is less than 0
     * @throws IllegalArgumentException if {@code numBands}
     *         is less than 1
     * @throws IllegalArgumentException if the product of {@code w}
     *         and {@code h} is greater than
     *         {@code Integer.MAX_VALUE}
     * @throws IllegalArgumentException if {@code dataType} is not
     *         one of the supported data types
     */
    public ComponentSampleModel(int dataType,
                                int w, int h,
                                int pixelStride,
                                int scanlineStride,
                                int[] bandOffsets) {
        super(dataType, w, h, bandOffsets.length);
        this.dataType = dataType;
        this.pixelStride = pixelStride;
        this.scanlineStride  = scanlineStride;
        this.bandOffsets = bandOffsets.clone();
        numBands = this.bandOffsets.length;
        if (pixelStride < 0) {
            throw new IllegalArgumentException("Pixel stride must be >= 0");
        }
        // TODO - bug 4296691 - remove this check
        if (scanlineStride < 0) {
            throw new IllegalArgumentException("Scanline stride must be >= 0");
        }
        if (numBands < 1) {
            throw new IllegalArgumentException("Must have at least one band.");
        }
        if ((dataType < DataBuffer.TYPE_BYTE) ||
            (dataType > DataBuffer.TYPE_DOUBLE)) {
            throw new IllegalArgumentException("Unsupported dataType.");
        }
        bankIndices = new int[numBands];
        for (int i=0; i= 0");
        }
        // TODO - bug 4296691 - remove this check
        if (scanlineStride < 0) {
            throw new IllegalArgumentException("Scanline stride must be >= 0");
        }
        if ((dataType < DataBuffer.TYPE_BYTE) ||
            (dataType > DataBuffer.TYPE_DOUBLE)) {
            throw new IllegalArgumentException("Unsupported dataType.");
        }
        int maxBank = this.bankIndices[0];
        if (maxBank < 0) {
            throw new IllegalArgumentException("Index of bank 0 is less than "+
                                               "0 ("+maxBank+")");
        }
        for (int i=1; i < this.bankIndices.length; i++) {
            if (this.bankIndices[i] > maxBank) {
                maxBank = this.bankIndices[i];
            }
            else if (this.bankIndices[i] < 0) {
                throw new IllegalArgumentException("Index of bank "+i+
                                                   " is less than 0 ("+
                                                   maxBank+")");
            }
        }
        numBanks         = maxBank+1;
        numBands         = this.bandOffsets.length;
        if (this.bandOffsets.length != this.bankIndices.length) {
            throw new IllegalArgumentException("Length of bandOffsets must "+
                                               "equal length of bankIndices.");
        }
        verify();
    }

    private void verify() {
        int requiredSize = getBufferSize();
    }

    /**
     * Returns the size of the data buffer (in data elements) needed
     * for a data buffer that matches this ComponentSampleModel.
     */
     private int getBufferSize() {
         int maxBandOff=bandOffsets[0];
         for (int i=1; i (Integer.MAX_VALUE - 1)) {
             throw new IllegalArgumentException("Invalid band offset");
         }

         if (pixelStride < 0 || pixelStride > (Integer.MAX_VALUE / width)) {
             throw new IllegalArgumentException("Invalid pixel stride");
         }

         if (scanlineStride < 0 || scanlineStride > (Integer.MAX_VALUE / height)) {
             throw new IllegalArgumentException("Invalid scanline stride");
         }

         int size = maxBandOff + 1;

         int val = pixelStride * (width - 1);

         if (val > (Integer.MAX_VALUE - size)) {
             throw new IllegalArgumentException("Invalid pixel stride");
         }

         size += val;

         val = scanlineStride * (height - 1);

         if (val > (Integer.MAX_VALUE - size)) {
             throw new IllegalArgumentException("Invalid scan stride");
         }

         size += val;

         return size;
     }

     /**
      * Preserves band ordering with new step factor...
      */
    int []orderBands(int[] orig, int step) {
        int[] map = new int[orig.length];
        int[] ret = new int[orig.length];

        for (int i=0; i orig[map[j]]) {
                    index = j;
                }
            }
            ret[map[index]] = i*step;
            map[index]  = map[i];
        }
        return ret;
    }

    /**
     * Creates a new {@code ComponentSampleModel} with the specified
     * width and height.  The new {@code SampleModel} will have the same
     * number of bands, storage data type, interleaving scheme, and
     * pixel stride as this {@code SampleModel}.
     * @param w the width of the resulting {@code SampleModel}
     * @param h the height of the resulting {@code SampleModel}
     * @return a new {@code ComponentSampleModel} with the specified size
     * @throws IllegalArgumentException if {@code w} or
     *         {@code h} is not greater than 0
     */
    public SampleModel createCompatibleSampleModel(int w, int h) {
        SampleModel ret=null;
        long size;
        int minBandOff=bandOffsets[0];
        int maxBandOff=bandOffsets[0];
        for (int i=1; i lStride) {
            if (pStride > bStride) {
                if (lStride > bStride) { // pix > line > band
                    bandOff = new int[bandOffsets.length];
                    for (int i=0; i band > line
                    bandOff = orderBands(bandOffsets,lStride*h);
                    pStride = bands*lStride*h;
                }
            } else { // band > pix > line
                pStride = lStride*h;
                bandOff = orderBands(bandOffsets,pStride*w);
            }
        } else {
            if (pStride > bStride) { // line > pix > band
                bandOff = new int[bandOffsets.length];
                for (int i=0; i bStride) { // line > band > pix
                    bandOff = orderBands(bandOffsets,pStride*w);
                    lStride = bands*pStride*w;
                } else { // band > line > pix
                    lStride = pStride*w;
                    bandOff = orderBands(bandOffsets,lStride*h);
                }
            }
        }

        // make sure we make room for negative offsets...
        int base = 0;
        if (scanlineStride < 0) {
            base += lStride*h;
            lStride *= -1;
        }
        if (pixelStride    < 0) {
            base += pStride*w;
            pStride *= -1;
        }

        for (int i=0; i bankIndices.length)
            throw new RasterFormatException("There are only " +
                                            bankIndices.length +
                                            " bands");
        int[] newBankIndices = new int[bands.length];
        int[] newBandOffsets = new int[bands.length];

        for (int i=0; i
     *        data.getElem(csm.getOffset(x, y));
     * 

     *       data.getElem(csm.getOffset(x, y, b));
     * 

     *       ComponentSampleModel csm1, csm2;
     *       DataBufferInt db1, db2;
     *       csm2.setDataElements(x, y,
     *                            csm1.getDataElements(x, y, null, db1), db2);
     * 

     *       ComponentSampleModel csm1, csm2;
     *       DataBufferInt db1, db2;
     *       csm2.setDataElements(x, y, csm1.getDataElements(x, y, null, db1),
     *                            db2);
     * 

* A {@code ClassCastException} is thrown if {@code obj} is not * a primitive array of type {@code TransferType}. * An {@code ArrayIndexOutOfBoundsException} might be thrown if * the coordinates are not in bounds, or if {@code obj} is not large * enough to hold the pixel data. * @param x the X coordinate of the pixel location * @param y the Y coordinate of the pixel location * @param obj a primitive array containing pixel data * @param data the DataBuffer containing the image data * @see #getDataElements(int, int, Object, DataBuffer) */ public void setDataElements(int x, int y, Object obj, DataBuffer data) { if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { throw new ArrayIndexOutOfBoundsException ("Coordinate out of bounds!"); } int type = getTransferType(); int numDataElems = getNumDataElements(); int pixelOffset = y*scanlineStride + x*pixelStride; switch(type) { case DataBuffer.TYPE_BYTE: byte[] barray = (byte[])obj; for (int i=0; i= width) || (y >= height)) { throw new ArrayIndexOutOfBoundsException ("Coordinate out of bounds!"); } int pixelOffset = y*scanlineStride + x*pixelStride; for (int i=0; i= width || w > width || x1 < 0 || x1 > width || y < 0 || y >= height || h > height || y1 < 0 || y1 > height) { throw new ArrayIndexOutOfBoundsException ("Coordinate out of bounds!"); } int lineOffset = y*scanlineStride + x*pixelStride; int srcOffset = 0; for (int i = 0; i < h; i++) { int pixelOffset = lineOffset; for (int j = 0; j < w; j++) { for (int k=0; k < numBands; k++) { data.setElem(bankIndices[k], pixelOffset + bandOffsets[k], iArray[srcOffset++]); } pixelOffset += pixelStride; } lineOffset += scanlineStride; } } /** * Sets a sample in the specified band for the pixel located at (x,y) * in the {@code DataBuffer} using an int for input. * An {@code ArrayIndexOutOfBoundsException} might be thrown if the * coordinates are not in bounds. * @param x The X coordinate of the pixel location * @param y The Y coordinate of the pixel location * @param b the band to set * @param s the input sample as an int * @param data the DataBuffer containing the image data * @see #getSample(int, int, int, DataBuffer) */ public void setSample(int x, int y, int b, int s, DataBuffer data) { // Bounds check for 'b' will be performed automatically if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { throw new ArrayIndexOutOfBoundsException ("Coordinate out of bounds!"); } data.setElem(bankIndices[b], y*scanlineStride + x*pixelStride + bandOffsets[b], s); } /** * Sets a sample in the specified band for the pixel located at (x,y) * in the {@code DataBuffer} using a float for input. * An {@code ArrayIndexOutOfBoundsException} might be thrown if * the coordinates are not in bounds. * @param x The X coordinate of the pixel location * @param y The Y coordinate of the pixel location * @param b The band to set * @param s The input sample as a float * @param data The DataBuffer containing the image data * @see #getSample(int, int, int, DataBuffer) */ public void setSample(int x, int y, int b, float s , DataBuffer data) { // Bounds check for 'b' will be performed automatically if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { throw new ArrayIndexOutOfBoundsException ("Coordinate out of bounds!"); } data.setElemFloat(bankIndices[b], y*scanlineStride + x*pixelStride + bandOffsets[b], s); } /** * Sets a sample in the specified band for the pixel located at (x,y) * in the {@code DataBuffer} using a double for input. * An {@code ArrayIndexOutOfBoundsException} might be thrown if * the coordinates are not in bounds. * @param x The X coordinate of the pixel location * @param y The Y coordinate of the pixel location * @param b The band to set * @param s The input sample as a double * @param data The DataBuffer containing the image data * @see #getSample(int, int, int, DataBuffer) */ public void setSample(int x, int y, int b, double s, DataBuffer data) { // Bounds check for 'b' will be performed automatically if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { throw new ArrayIndexOutOfBoundsException ("Coordinate out of bounds!"); } data.setElemDouble(bankIndices[b], y*scanlineStride + x*pixelStride + bandOffsets[b], s); } /** * Sets the samples in the specified band for the specified rectangle * of pixels from an int array containing one sample per data array element. * An {@code ArrayIndexOutOfBoundsException} might be thrown if the * coordinates are not in bounds. * @param x The X coordinate of the upper left pixel location * @param y The Y coordinate of the upper left pixel location * @param w The width of the pixel rectangle * @param h The height of the pixel rectangle * @param b The band to set * @param iArray The input samples in an int array * @param data The DataBuffer containing the image data * @see #getSamples(int, int, int, int, int, int[], DataBuffer) */ public void setSamples(int x, int y, int w, int h, int b, int[] iArray, DataBuffer data) { // Bounds check for 'b' will be performed automatically if ((x < 0) || (y < 0) || (x + w > width) || (y + h > height)) { throw new ArrayIndexOutOfBoundsException ("Coordinate out of bounds!"); } int lineOffset = y*scanlineStride + x*pixelStride + bandOffsets[b]; int srcOffset = 0; for (int i = 0; i < h; i++) { int sampleOffset = lineOffset; for (int j = 0; j < w; j++) { data.setElem(bankIndices[b], sampleOffset, iArray[srcOffset++]); sampleOffset += pixelStride; } lineOffset += scanlineStride; } } public boolean equals(Object o) { if ((o == null) || !(o instanceof ComponentSampleModel)) { return false; } ComponentSampleModel that = (ComponentSampleModel)o; return this.width == that.width && this.height == that.height && this.numBands == that.numBands && this.dataType == that.dataType && Arrays.equals(this.bandOffsets, that.bandOffsets) && Arrays.equals(this.bankIndices, that.bankIndices) && this.numBands == that.numBands && this.numBanks == that.numBanks && this.scanlineStride == that.scanlineStride && this.pixelStride == that.pixelStride; } // If we implement equals() we must also implement hashCode public int hashCode() { int hash = 0; hash = width; hash <<= 8; hash ^= height; hash <<= 8; hash ^= numBands; hash <<= 8; hash ^= dataType; hash <<= 8; for (int i = 0; i < bandOffsets.length; i++) { hash ^= bandOffsets[i]; hash <<= 8; } for (int i = 0; i < bankIndices.length; i++) { hash ^= bankIndices[i]; hash <<= 8; } hash ^= numBands; hash <<= 8; hash ^= numBanks; hash <<= 8; hash ^= scanlineStride; hash <<= 8; hash ^= pixelStride; return hash; } }