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769 lines
31 KiB
Java
769 lines
31 KiB
Java
/*
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* Copyright (c) 1998, 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.awt.image;
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import java.awt.image.Raster;
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import java.awt.image.WritableRaster;
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import java.awt.image.RasterFormatException;
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import java.awt.image.SampleModel;
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import java.awt.image.ComponentSampleModel;
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import java.awt.image.PixelInterleavedSampleModel;
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import java.awt.image.SinglePixelPackedSampleModel;
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import java.awt.image.DataBufferUShort;
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import java.awt.Rectangle;
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import java.awt.Point;
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/**
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* This class defines a Raster with pixels consisting of one or more 16-bit
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* data elements stored in close proximity to each other in a short integer
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* array. The bit precision per data element is that
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* of the data type (that is, the bit precision for this Raster is 16).
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* There is only one pixel stride and one scanline stride for all
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* bands. This type of Raster can be used with a
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* ComponentColorModel if there are multiple bands, or a
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* IndexColorModel if there is only one band.
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* <p>
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* For example, 5-6-5 RGB image data can be represented by a
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* ShortInterleavedRaster using a SinglePixelPackedSampleModel and
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* a ComponentColorModel.
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*
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*
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*/
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public class ShortInterleavedRaster extends ShortComponentRaster {
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/** A cached copy of minX + width for use in bounds checks. */
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private int maxX;
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/** A cached copy of minY + height for use in bounds checks. */
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private int maxY;
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/**
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* Constructs a ShortInterleavedRaster with the given SampleModel.
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* The Raster's upper left corner is origin and it is the same
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* size as the SampleModel. A DataBuffer large enough to describe the
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* Raster is automatically created. SampleModel must be of type
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* PixelInterleavedSampleModel or SinglePixelPackedSampleModel.
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* @param sampleModel The SampleModel that specifies the layout.
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* @param origin The Point that specified the origin.
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*/
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public ShortInterleavedRaster(SampleModel sampleModel, Point origin) {
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this(sampleModel,
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(DataBufferUShort) sampleModel.createDataBuffer(),
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new Rectangle(origin.x,
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origin.y,
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sampleModel.getWidth(),
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sampleModel.getHeight()),
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origin,
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null);
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}
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/**
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* Constructs a ShortInterleavedRaster with the given SampleModel
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* and DataBuffer. The Raster's upper left corner is origin and
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* it is the same sizes the SampleModel. The DataBuffer is not
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* initialized and must be a DataBufferUShort compatible with SampleModel.
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* SampleModel must be of type PixelInterleavedSampleModel or
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* SinglePixelPackedSampleModel.
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* @param sampleModel The SampleModel that specifies the layout.
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* @param dataBuffer The DataBufferUShort that contains the image data.
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* @param origin The Point that specifies the origin.
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*/
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public ShortInterleavedRaster(SampleModel sampleModel,
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DataBufferUShort dataBuffer,
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Point origin)
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{
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this(sampleModel,
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dataBuffer,
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new Rectangle(origin.x,
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origin.y,
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sampleModel.getWidth(),
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sampleModel.getHeight()),
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origin,
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null);
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}
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/**
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* Constructs a ShortInterleavedRaster with the given SampleModel,
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* DataBuffer, and parent. DataBuffer must be a DataBufferUShort and
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* SampleModel must be of type PixelInterleavedSampleModel or
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* SinglePixelPackedSampleModel. When translated into the base Raster's
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* coordinate system, aRegion must be contained by the base Raster.
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* Origin is the coodinate in the new Raster's coordinate system of
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* the origin of the base Raster. (The base Raster is the Raster's
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* ancestor which has no parent.)
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*
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* Note that this constructor should generally be called by other
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* constructors or create methods, it should not be used directly.
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* @param sampleModel The SampleModel that specifies the layout.
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* @param dataBuffer The DataBufferUShort that contains the image data.
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* @param aRegion The Rectangle that specifies the image area.
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* @param origin The Point that specifies the origin.
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* @param parent The parent (if any) of this raster.
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*/
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public ShortInterleavedRaster(SampleModel sampleModel,
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DataBufferUShort dataBuffer,
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Rectangle aRegion,
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Point origin,
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ShortInterleavedRaster parent)
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{
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super(sampleModel, dataBuffer, aRegion, origin, parent);
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this.maxX = minX + width;
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this.maxY = minY + height;
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this.data = stealData(dataBuffer, 0);
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// REMIND: need case for interleaved ComponentSampleModel
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if ((sampleModel instanceof PixelInterleavedSampleModel) ||
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(sampleModel instanceof ComponentSampleModel &&
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sampleModel.getNumBands() == 1)) {
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ComponentSampleModel csm = (ComponentSampleModel)sampleModel;
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this.scanlineStride = csm.getScanlineStride();
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this.pixelStride = csm.getPixelStride();
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this.dataOffsets = csm.getBandOffsets();
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int xOffset = aRegion.x - origin.x;
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int yOffset = aRegion.y - origin.y;
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for (int i = 0; i < getNumDataElements(); i++) {
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dataOffsets[i] += xOffset*pixelStride+yOffset*scanlineStride;
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}
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} else if (sampleModel instanceof SinglePixelPackedSampleModel) {
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SinglePixelPackedSampleModel sppsm =
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(SinglePixelPackedSampleModel)sampleModel;
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this.scanlineStride = sppsm.getScanlineStride();
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this.pixelStride = 1;
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this.dataOffsets = new int[1];
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this.dataOffsets[0] = dataBuffer.getOffset();
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int xOffset = aRegion.x - origin.x;
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int yOffset = aRegion.y - origin.y;
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dataOffsets[0] += xOffset+yOffset*scanlineStride;
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} else {
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throw new RasterFormatException("ShortInterleavedRasters must "+
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"have PixelInterleavedSampleModel, SinglePixelPackedSampleModel"+
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" or 1 band ComponentSampleModel. Sample model is "+
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sampleModel);
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}
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this.bandOffset = this.dataOffsets[0];
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verify();
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}
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/**
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* Returns a copy of the data offsets array. For each band the data offset
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* is the index into the band's data array, of the first sample of the
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* band.
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*/
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public int[] getDataOffsets() {
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return dataOffsets.clone();
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}
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/**
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* Returns the data offset for the specified band. The data offset
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* is the index into the data array in which the first sample
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* of the first scanline is stored.
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* @param band The band whose offset is returned.
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*/
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public int getDataOffset(int band) {
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return dataOffsets[band];
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}
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/**
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* Returns the scanline stride -- the number of data array elements between
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* a given sample and the same sample in the same column of the next row.
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*/
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public int getScanlineStride() {
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return scanlineStride;
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}
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/**
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* Returns pixel stride -- the number of data array elements between two
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* samples for the same band on the same scanline.
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*/
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public int getPixelStride() {
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return pixelStride;
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}
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/**
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* Returns a reference to the data array.
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*/
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public short[] getDataStorage() {
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return data;
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}
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/**
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* Returns the data elements for all bands at the specified
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* location.
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* An ArrayIndexOutOfBounds exception will be thrown at runtime
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* if the pixel coordinate is out of bounds.
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* A ClassCastException will be thrown if the input object is non null
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* and references anything other than an array of transferType.
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* @param x The X coordinate of the pixel location.
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* @param y The Y coordinate of the pixel location.
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* @param obj An object reference to an array of type defined by
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* getTransferType() and length getNumDataElements().
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* If null an array of appropriate type and size will be
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* allocated.
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* @return An object reference to an array of type defined by
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* getTransferType() with the request pixel data.
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*/
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public Object getDataElements(int x, int y, Object obj) {
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if ((x < this.minX) || (y < this.minY) ||
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(x >= this.maxX) || (y >= this.maxY)) {
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throw new ArrayIndexOutOfBoundsException
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("Coordinate out of bounds!");
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}
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short[] outData;
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if (obj == null) {
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outData = new short[numDataElements];
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} else {
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outData = (short[])obj;
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}
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int off = (y-minY)*scanlineStride +
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(x-minX)*pixelStride;
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for (int band = 0; band < numDataElements; band++) {
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outData[band] = data[dataOffsets[band] + off];
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}
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return outData;
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}
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/**
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* Returns an array of data elements from the specified rectangular
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* region.
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* An ArrayIndexOutOfBounds exception will be thrown at runtime
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* if the pixel coordinates are out of bounds.
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* A ClassCastException will be thrown if the input object is non null
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* and references anything other than an array of transferType.
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* <pre>
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* short[] bandData = (short[])Raster.getDataElements(x, y, w, h, null);
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* int numDataElements = Raster.getBands();
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* short[] pixel = new short[numDataElements];
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* // To find the data element at location (x2, y2)
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* System.arraycopy(bandData, ((y2-y)*w + (x2-x))*numDataElements,
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* pixel, 0, numDataElements);
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* </pre>
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* @param x The X coordinate of the upper left pixel location.
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* @param y The Y coordinate of the upper left pixel location.
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* @param w Width of the pixel rectangle.
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* @param h Height of the pixel rectangle.
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* @param obj An object reference to an array of type defined by
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* getTransferType() and length w*h*getNumDataElements().
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* If null an array of appropriate type and size will be
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* allocated.
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* @return An object reference to an array of type defined by
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* getTransferType() with the request pixel data.
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*/
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public Object getDataElements(int x, int y, int w, int h, Object obj) {
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if ((x < this.minX) || (y < this.minY) ||
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(x + w > this.maxX) || (y + h > this.maxY)) {
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throw new ArrayIndexOutOfBoundsException
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("Coordinate out of bounds!");
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}
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short[] outData;
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if (obj == null) {
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outData = new short[w*h*numDataElements];
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} else {
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outData = (short[])obj;
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}
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int yoff = (y-minY)*scanlineStride +
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(x-minX)*pixelStride;
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int xoff;
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int off = 0;
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int xstart;
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int ystart;
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for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
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xoff = yoff;
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for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
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for (int c = 0; c < numDataElements; c++) {
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outData[off++] = data[dataOffsets[c] + xoff];
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}
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}
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}
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return outData;
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}
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/**
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* Returns a short integer array of data elements from the
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* specified rectangular region.
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* An ArrayIndexOutOfBounds exception will be thrown at runtime
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* if the pixel coordinates are out of bounds.
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* <pre>
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* short[] bandData = Raster.getShortData(x, y, w, h, null);
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* // To find the data element at location (x2, y2)
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* short dataElenent = bandData[((y2-y)*w + (x2-x))];
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* </pre>
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* @param x The X coordinate of the upper left pixel location.
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* @param y The Y coordinate of the upper left pixel location.
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* @param w Width of the sample rectangle.
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* @param h Height of the sample rectangle.
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* @param band The band to return.
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* @param outData If non-null, data elements for all bands
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* at the specified location are returned in this array.
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* @return Data array with data elements for all bands.
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*/
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public short[] getShortData(int x, int y, int w, int h,
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int band, short[] outData) {
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// Bounds check for 'band' will be performed automatically
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if ((x < this.minX) || (y < this.minY) ||
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(x + w > this.maxX) || (y + h > this.maxY)) {
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throw new ArrayIndexOutOfBoundsException
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("Coordinate out of bounds!");
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}
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if (outData == null) {
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outData = new short[numDataElements*w*h];
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}
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int yoff = (y-minY)*scanlineStride +
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(x-minX)*pixelStride+ dataOffsets[band];
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int xoff;
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int off = 0;
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int xstart;
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int ystart;
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if (pixelStride == 1) {
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if (scanlineStride == w) {
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System.arraycopy(data, yoff, outData, 0, w*h);
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}
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else {
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for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
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System.arraycopy(data, yoff, outData, off, w);
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off += w;
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}
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}
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}
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else {
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for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
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xoff = yoff;
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for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
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outData[off++] = data[xoff];
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}
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}
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}
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return outData;
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}
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/**
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* Returns a short integer array of data elements from the
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* specified rectangular region.
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* An ArrayIndexOutOfBounds exception will be thrown at runtime
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* if the pixel coordinates are out of bounds.
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* <pre>
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* short[] bandData = Raster.getShortData(x, y, w, h, null);
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* int numDataElements = Raster.getNumBands();
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* short[] pixel = new short[numDataElements];
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* // To find the data element at location (x2, y2)
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* System.arraycopy(bandData, ((y2-y)*w + (x2-x))*numDataElements,
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* pixel, 0, numDataElements);
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* </pre>
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* @param x The X coordinate of the upper left pixel location.
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* @param y The Y coordinate of the upper left pixel location.
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* @param w Width of the pixel rectangle.
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* @param h Height of the pixel rectangle.
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* @param outData If non-null, data elements for all bands
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* at the specified location are returned in this array.
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* @return Data array with data elements for all bands.
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*/
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public short[] getShortData(int x, int y, int w, int h, short[] outData) {
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if ((x < this.minX) || (y < this.minY) ||
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(x + w > this.maxX) || (y + h > this.maxY)) {
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throw new ArrayIndexOutOfBoundsException
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("Coordinate out of bounds!");
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}
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if (outData == null) {
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outData = new short[numDataElements*w*h];
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}
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int yoff = (y-minY)*scanlineStride +
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(x-minX)*pixelStride;
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int xoff;
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int off = 0;
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int xstart;
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int ystart;
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for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
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xoff = yoff;
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for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
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for (int c = 0; c < numDataElements; c++) {
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outData[off++] = data[dataOffsets[c] + xoff];
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}
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}
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}
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return outData;
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}
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/**
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* Stores the data elements for all bands at the specified location.
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* An ArrayIndexOutOfBounds exception will be thrown at runtime
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* if the pixel coordinate is out of bounds.
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|
* A ClassCastException will be thrown if the input object is non null
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* and references anything other than an array of transferType.
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* @param x The X coordinate of the pixel location.
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* @param y The Y coordinate of the pixel location.
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|
* @param obj An object reference to an array of type defined by
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* getTransferType() and length getNumDataElements()
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* containing the pixel data to place at x,y.
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*/
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public void setDataElements(int x, int y, Object obj) {
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if ((x < this.minX) || (y < this.minY) ||
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(x >= this.maxX) || (y >= this.maxY)) {
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throw new ArrayIndexOutOfBoundsException
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("Coordinate out of bounds!");
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}
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short[] inData = (short[])obj;
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int off = (y-minY)*scanlineStride +
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(x-minX)*pixelStride;
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for (int i = 0; i < numDataElements; i++) {
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data[dataOffsets[i] + off] = inData[i];
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}
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markDirty();
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}
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/**
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* Stores the Raster data at the specified location.
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|
* An ArrayIndexOutOfBounds exception will be thrown at runtime
|
|
* if the pixel coordinates are out of bounds.
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* @param x The X coordinate of the pixel location.
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* @param y The Y coordinate of the pixel location.
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* @param inRaster Raster of data to place at x,y location.
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*/
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public void setDataElements(int x, int y, Raster inRaster) {
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int dstOffX = x + inRaster.getMinX();
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int dstOffY = y + inRaster.getMinY();
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int width = inRaster.getWidth();
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int height = inRaster.getHeight();
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if ((dstOffX < this.minX) || (dstOffY < this.minY) ||
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(dstOffX + width > this.maxX) || (dstOffY + height > this.maxY)) {
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throw new ArrayIndexOutOfBoundsException
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("Coordinate out of bounds!");
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}
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setDataElements(dstOffX, dstOffY, width, height, inRaster);
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}
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/**
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* Stores the Raster data at the specified location.
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|
* @param dstX The absolute X coordinate of the destination pixel
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|
* that will receive a copy of the upper-left pixel of the
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* inRaster
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* @param dstY The absolute Y coordinate of the destination pixel
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|
* that will receive a copy of the upper-left pixel of the
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* inRaster
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* @param width The number of pixels to store horizontally
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* @param height The number of pixels to store vertically
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|
* @param inRaster Raster of data to place at x,y location.
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*/
|
|
private void setDataElements(int dstX, int dstY,
|
|
int width, int height,
|
|
Raster inRaster) {
|
|
// Assume bounds checking has been performed previously
|
|
if (width <= 0 || height <= 0) {
|
|
return;
|
|
}
|
|
|
|
// Write inRaster (minX, minY) to (dstX, dstY)
|
|
|
|
int srcOffX = inRaster.getMinX();
|
|
int srcOffY = inRaster.getMinY();
|
|
Object tdata = null;
|
|
|
|
// REMIND: Do something faster!
|
|
// if (inRaster instanceof ShortInterleavedRaster) {
|
|
// }
|
|
|
|
for (int startY=0; startY < height; startY++) {
|
|
// Grab one scanline at a time
|
|
tdata = inRaster.getDataElements(srcOffX, srcOffY+startY,
|
|
width, 1, tdata);
|
|
setDataElements(dstX, dstY + startY, width, 1, tdata);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Stores an array of data elements into the specified rectangular
|
|
* region.
|
|
* An ArrayIndexOutOfBounds exception will be thrown at runtime
|
|
* if the pixel coordinates are out of bounds.
|
|
* A ClassCastException will be thrown if the input object is non null
|
|
* and references anything other than an array of transferType.
|
|
* The data elements in the
|
|
* data array are assumed to be packed. That is, a data element
|
|
* for the nth band at location (x2, y2) would be found at:
|
|
* <pre>
|
|
* inData[((y2-y)*w + (x2-x))*numDataElements + n]
|
|
* </pre>
|
|
* @param x The X coordinate of the upper left pixel location.
|
|
* @param y The Y coordinate of the upper left pixel location.
|
|
* @param w Width of the pixel rectangle.
|
|
* @param h Height of the pixel rectangle.
|
|
* @param obj An object reference to an array of type defined by
|
|
* getTransferType() and length w*h*getNumDataElements()
|
|
* containing the pixel data to place between x,y and
|
|
* x+h, y+h.
|
|
*/
|
|
public void setDataElements(int x, int y, int w, int h, Object obj) {
|
|
if ((x < this.minX) || (y < this.minY) ||
|
|
(x + w > this.maxX) || (y + h > this.maxY)) {
|
|
throw new ArrayIndexOutOfBoundsException
|
|
("Coordinate out of bounds!");
|
|
}
|
|
short[] inData = (short[])obj;
|
|
int yoff = (y-minY)*scanlineStride +
|
|
(x-minX)*pixelStride;
|
|
int xoff;
|
|
int off = 0;
|
|
int xstart;
|
|
int ystart;
|
|
|
|
for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
|
|
xoff = yoff;
|
|
for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
|
|
for (int c = 0; c < numDataElements; c++) {
|
|
data[dataOffsets[c] + xoff] = inData[off++];
|
|
}
|
|
}
|
|
}
|
|
|
|
markDirty();
|
|
}
|
|
|
|
/**
|
|
* Stores a short integer array of data elements into the
|
|
* specified rectangular region.
|
|
* An ArrayIndexOutOfBounds exception will be thrown at runtime
|
|
* if the pixel coordinates are out of bounds.
|
|
* The data elements in the
|
|
* data array are assumed to be packed. That is, a data element
|
|
* at location (x2, y2) would be found at:
|
|
* <pre>
|
|
* inData[((y2-y)*w + (x2-x))]
|
|
* </pre>
|
|
* @param x The X coordinate of the upper left pixel location.
|
|
* @param y The Y coordinate of the upper left pixel location.
|
|
* @param w Width of the pixel rectangle.
|
|
* @param h Height of the pixel rectangle.
|
|
* @param band The band to set.
|
|
* @param inData The data elements to be stored.
|
|
*/
|
|
public void putShortData(int x, int y, int w, int h,
|
|
int band, short[] inData) {
|
|
// Bounds check for 'band' will be performed automatically
|
|
if ((x < this.minX) || (y < this.minY) ||
|
|
(x + w > this.maxX) || (y + h > this.maxY)) {
|
|
throw new ArrayIndexOutOfBoundsException
|
|
("Coordinate out of bounds!");
|
|
}
|
|
int yoff = (y-minY)*scanlineStride +
|
|
(x-minX)*pixelStride + dataOffsets[band];
|
|
int xoff;
|
|
int off = 0;
|
|
int xstart;
|
|
int ystart;
|
|
|
|
if (pixelStride == 1) {
|
|
if (scanlineStride == w) {
|
|
System.arraycopy(inData, 0, data, yoff, w*h);
|
|
}
|
|
else {
|
|
for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
|
|
System.arraycopy(inData, off, data, yoff, w);
|
|
off += w;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
|
|
xoff = yoff;
|
|
for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
|
|
data[xoff] = inData[off++];
|
|
}
|
|
}
|
|
}
|
|
|
|
markDirty();
|
|
}
|
|
|
|
/**
|
|
* Stores a short integer array of data elements into the
|
|
* specified rectangular region.
|
|
* An ArrayIndexOutOfBounds exception will be thrown at runtime
|
|
* if the pixel coordinates are out of bounds.
|
|
* The data elements in the
|
|
* data array are assumed to be packed. That is, a data element
|
|
* for the nth band at location (x2, y2) would be found at:
|
|
* <pre>
|
|
* inData[((y2-y)*w + (x2-x))*numDataElements + n]
|
|
* </pre>
|
|
* @param x The X coordinate of the upper left pixel location.
|
|
* @param y The Y coordinate of the upper left pixel location.
|
|
* @param w Width of the pixel rectangle.
|
|
* @param h Height of the pixel rectangle.
|
|
* @param inData The data elements to be stored.
|
|
*/
|
|
public void putShortData(int x, int y, int w, int h, short[] inData) {
|
|
if ((x < this.minX) || (y < this.minY) ||
|
|
(x + w > this.maxX) || (y + h > this.maxY)) {
|
|
throw new ArrayIndexOutOfBoundsException
|
|
("Coordinate out of bounds!");
|
|
}
|
|
int yoff = (y-minY)*scanlineStride +
|
|
(x-minX)*pixelStride;
|
|
int xoff;
|
|
int off = 0;
|
|
int xstart;
|
|
int ystart;
|
|
|
|
for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
|
|
xoff = yoff;
|
|
for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
|
|
for (int c = 0; c < numDataElements; c++) {
|
|
data[dataOffsets[c] + xoff] = inData[off++];
|
|
}
|
|
}
|
|
}
|
|
|
|
markDirty();
|
|
}
|
|
|
|
/**
|
|
* Creates a subraster given a region of the raster. The x and y
|
|
* coordinates specify the horizontal and vertical offsets
|
|
* from the upper-left corner of this raster to the upper-left corner
|
|
* of the subraster. A subset of the bands of the parent Raster may
|
|
* be specified. If this is null, then all the bands are present in the
|
|
* subRaster. A translation to the subRaster may also be specified.
|
|
* Note that the subraster will reference the same
|
|
* band objects as the parent raster, but using different offsets.
|
|
* @param x X offset.
|
|
* @param y Y offset.
|
|
* @param width Width (in pixels) of the subraster.
|
|
* @param height Height (in pixels) of the subraster.
|
|
* @param x0 Translated X origin of the subraster.
|
|
* @param y0 Translated Y origin of the subraster.
|
|
* @param bandList Array of band indices.
|
|
* @throws RasterFormatException
|
|
* if the specified bounding box is outside of the parent raster.
|
|
*/
|
|
public Raster createChild (int x, int y,
|
|
int width, int height,
|
|
int x0, int y0, int[] bandList) {
|
|
WritableRaster newRaster = createWritableChild(x, y,
|
|
width, height,
|
|
x0, y0,
|
|
bandList);
|
|
return (Raster) newRaster;
|
|
}
|
|
|
|
/**
|
|
* Creates a Writable subRaster given a region of the Raster. The x and y
|
|
* coordinates specify the horizontal and vertical offsets
|
|
* from the upper-left corner of this Raster to the upper-left corner
|
|
* of the subRaster. A subset of the bands of the parent Raster may
|
|
* be specified. If this is null, then all the bands are present in the
|
|
* subRaster. A translation to the subRaster may also be specified.
|
|
* Note that the subRaster will reference the same
|
|
* DataBuffers as the parent Raster, but using different offsets.
|
|
* @param x X offset.
|
|
* @param y Y offset.
|
|
* @param width Width (in pixels) of the subraster.
|
|
* @param height Height (in pixels) of the subraster.
|
|
* @param x0 Translated X origin of the subraster.
|
|
* @param y0 Translated Y origin of the subraster.
|
|
* @param bandList Array of band indices.
|
|
* @throws RasterFormatException
|
|
* if the specified bounding box is outside of the parent Raster.
|
|
*/
|
|
public WritableRaster createWritableChild(int x, int y,
|
|
int width, int height,
|
|
int x0, int y0,
|
|
int[] bandList) {
|
|
if (x < this.minX) {
|
|
throw new RasterFormatException("x lies outside the raster");
|
|
}
|
|
if (y < this.minY) {
|
|
throw new RasterFormatException("y lies outside the raster");
|
|
}
|
|
if ((x+width < x) || (x+width > this.minX + this.width)) {
|
|
throw new RasterFormatException("(x + width) is outside of Raster");
|
|
}
|
|
if ((y+height < y) || (y+height > this.minY + this.height)) {
|
|
throw new RasterFormatException("(y + height) is outside of Raster");
|
|
}
|
|
|
|
SampleModel sm;
|
|
|
|
if (bandList != null)
|
|
sm = sampleModel.createSubsetSampleModel(bandList);
|
|
else
|
|
sm = sampleModel;
|
|
|
|
int deltaX = x0 - x;
|
|
int deltaY = y0 - y;
|
|
|
|
return new ShortInterleavedRaster(sm,
|
|
(DataBufferUShort) dataBuffer,
|
|
new Rectangle(x0, y0, width, height),
|
|
new Point(sampleModelTranslateX+deltaX,
|
|
sampleModelTranslateY+deltaY),
|
|
this);
|
|
}
|
|
|
|
/**
|
|
* Creates a Raster with the same layout but using a different
|
|
* width and height, and with new zeroed data arrays.
|
|
*/
|
|
public WritableRaster createCompatibleWritableRaster(int w, int h) {
|
|
if (w <= 0 || h <=0) {
|
|
throw new RasterFormatException("negative "+
|
|
((w <= 0) ? "width" : "height"));
|
|
}
|
|
|
|
SampleModel sm = sampleModel.createCompatibleSampleModel(w, h);
|
|
|
|
return new ShortInterleavedRaster(sm, new Point(0, 0));
|
|
}
|
|
|
|
/**
|
|
* Creates a Raster with the same layout and the same
|
|
* width and height, and with new zeroed data arrays. If
|
|
* the Raster is a subRaster, this will call
|
|
* createCompatibleRaster(width, height).
|
|
*/
|
|
public WritableRaster createCompatibleWritableRaster() {
|
|
return createCompatibleWritableRaster(width,height);
|
|
}
|
|
|
|
public String toString() {
|
|
return "ShortInterleavedRaster: width = " + width
|
|
+ " height = " + height
|
|
+ " #numDataElements " + numDataElements;
|
|
// +" xOff = "+xOffset+" yOff = "+yOffset);
|
|
}
|
|
|
|
}
|