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1435 lines
57 KiB
Java
1435 lines
57 KiB
Java
/*
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* Copyright (c) 1997, 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.Point;
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import java.awt.Rectangle;
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import java.awt.image.DataBuffer;
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import java.awt.image.DataBufferByte;
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import java.awt.image.MultiPixelPackedSampleModel;
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import java.awt.image.Raster;
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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.WritableRaster;
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/**
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* This class is useful for describing 1, 2, or 4 bit image data
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* elements. This raster has one band whose pixels are packed
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* together into individual bytes in a single byte array. This type
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* of raster can be used with an IndexColorModel. This raster uses a
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* MultiPixelPackedSampleModel.
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*
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*/
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public class BytePackedRaster extends SunWritableRaster {
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/** The data bit offset for each pixel. */
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int dataBitOffset;
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/** Scanline stride of the image data contained in this Raster. */
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int scanlineStride;
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/**
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* The bit stride of a pixel, equal to the total number of bits
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* required to store a pixel.
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*/
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int pixelBitStride;
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/** The bit mask for extracting the pixel. */
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int bitMask;
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/** The image data array. */
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byte[] data;
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/** 8 minus the pixel bit stride. */
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int shiftOffset;
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int type;
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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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private static native void initIDs();
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static {
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/* ensure that the necessary native libraries are loaded */
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NativeLibLoader.loadLibraries();
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initIDs();
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}
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/**
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* Constructs a BytePackedRaster 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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* MultiPixelPackedSampleModel.
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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 BytePackedRaster(SampleModel sampleModel, Point origin) {
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this(sampleModel,
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(DataBufferByte) 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 BytePackedRaster 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 size as the SampleModel. The DataBuffer is not
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* initialized and must be a DataBufferByte compatible with SampleModel.
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* SampleModel must be of type MultiPixelPackedSampleModel.
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* @param sampleModel The SampleModel that specifies the layout.
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* @param dataBuffer The DataBufferByte 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 BytePackedRaster(SampleModel sampleModel,
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DataBufferByte 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 BytePackedRaster with the given SampleModel,
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* DataBuffer, and parent. DataBuffer must be a DataBufferByte and
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* SampleModel must be of type MultiPixelPackedSampleModel.
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* 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 coordinate 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 DataBufferByte 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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* @throws RasterFormatException if the parameters do not conform
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* to requirements of this Raster type.
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*/
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public BytePackedRaster(SampleModel sampleModel,
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DataBufferByte dataBuffer,
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Rectangle aRegion,
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Point origin,
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BytePackedRaster 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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if (dataBuffer.getNumBanks() != 1) {
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throw new
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RasterFormatException("DataBuffer for BytePackedRasters"+
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" must only have 1 bank.");
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}
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int dbOffset = dataBuffer.getOffset();
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if (sampleModel instanceof MultiPixelPackedSampleModel) {
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MultiPixelPackedSampleModel mppsm =
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(MultiPixelPackedSampleModel)sampleModel;
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this.type = IntegerComponentRaster.TYPE_BYTE_BINARY_SAMPLES;
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pixelBitStride = mppsm.getPixelBitStride();
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if (pixelBitStride != 1 &&
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pixelBitStride != 2 &&
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pixelBitStride != 4) {
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throw new RasterFormatException
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("BytePackedRasters must have a bit depth of 1, 2, or 4");
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}
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scanlineStride = mppsm.getScanlineStride();
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dataBitOffset = mppsm.getDataBitOffset() + dbOffset*8;
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int xOffset = aRegion.x - origin.x;
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int yOffset = aRegion.y - origin.y;
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dataBitOffset += xOffset*pixelBitStride + yOffset*scanlineStride*8;
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bitMask = (1 << pixelBitStride) -1;
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shiftOffset = 8 - pixelBitStride;
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} else {
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throw new RasterFormatException("BytePackedRasters must have"+
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"MultiPixelPackedSampleModel");
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}
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verify(false);
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}
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/**
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* Returns the data bit offset for the Raster. The data
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* bit offset is the bit index into the data array element
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* corresponding to the first sample of the first scanline.
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*/
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public int getDataBitOffset() {
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return dataBitOffset;
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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 sample in the same column
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* 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 bit stride -- the number of bits between two
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* samples on the same scanline.
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*/
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public int getPixelBitStride() {
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return pixelBitStride;
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}
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/**
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* Returns a reference to the entire data array.
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*/
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public byte[] getDataStorage() {
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return data;
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}
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/**
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* Returns the data element 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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byte[] outData;
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if (obj == null) {
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outData = new byte[numDataElements];
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} else {
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outData = (byte[])obj;
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}
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int bitnum = dataBitOffset + (x-minX) * pixelBitStride;
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// Fix 4184283
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int element = data[(y-minY) * scanlineStride + (bitnum >> 3)] & 0xff;
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int shift = shiftOffset - (bitnum & 7);
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outData[0] = (byte)((element >> shift) & bitMask);
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return outData;
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}
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/**
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* Returns the pixel data for the specified rectangle of pixels in a
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* primitive array of type TransferType.
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* For image data supported by the Java 2D API, this
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* will be one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT, or
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* DataBuffer.TYPE_INT. Data may be returned in a packed format,
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* thus increasing efficiency for data transfers.
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*
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* An ArrayIndexOutOfBoundsException may be thrown
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* if the coordinates are not in 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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* @see java.awt.image.SampleModel#getDataElements(int, int, int, int, Object, DataBuffer)
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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 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 requested pixel data.
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*/
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public Object getDataElements(int x, int y, int w, int h,
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Object outData) {
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return getByteData(x, y, w, h, (byte[])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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*
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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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* byte[] bandData = (byte[])raster.getPixelData(x, y, w, h, null);
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* int pixel;
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* // To find a data element at location (x2, y2)
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* pixel = 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 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 getPixelData(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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byte[] outData;
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if (obj == null) {
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outData = new byte[numDataElements*w*h];
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} else {
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outData = (byte[])obj;
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}
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int pixbits = pixelBitStride;
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int scanbit = dataBitOffset + (x-minX) * pixbits;
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int index = (y-minY) * scanlineStride;
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int outindex = 0;
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byte[] data = this.data;
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for (int j = 0; j < h; j++) {
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int bitnum = scanbit;
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for (int i = 0; i < w; i++) {
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int shift = shiftOffset - (bitnum & 7);
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outData[outindex++] =
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(byte)(bitMask & (data[index + (bitnum >> 3)] >> shift));
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bitnum += pixbits;
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}
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index += scanlineStride;
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}
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return outData;
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}
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/**
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* Returns a byte array containing the specified data elements
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* from the data array. The band index will be ignored.
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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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* byte[] byteData = getByteData(x, y, band, w, h, null);
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* // To find a data element at location (x2, y2)
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* byte element = byteData[(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 pixel rectangle.
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* @param h Height of the pixel rectangle.
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* @param band The band to return, is ignored.
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* @param outData If non-null, data elements
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* at the specified locations are returned in this array.
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* @return Byte array with data elements.
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*/
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public byte[] getByteData(int x, int y, int w, int h,
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int band, byte[] outData) {
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return getByteData(x, y, w, h, outData);
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}
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/**
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* Returns a byte array containing the specified data elements
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* from the data array.
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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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* byte[] byteData = raster.getByteData(x, y, w, h, null);
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* byte pixel;
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* // To find a data element at location (x2, y2)
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* pixel = byteData[((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 pixel rectangle.
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* @param h Height of the pixel rectangle.
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* @param outData If non-null, data elements
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* at the specified locations are returned in this array.
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* @return Byte array with data elements.
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*/
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public byte[] getByteData(int x, int y, int w, int h, byte[] 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 byte[w * h];
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}
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int pixbits = pixelBitStride;
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int scanbit = dataBitOffset + (x-minX) * pixbits;
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int index = (y-minY) * scanlineStride;
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int outindex = 0;
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byte[] data = this.data;
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for (int j = 0; j < h; j++) {
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int bitnum = scanbit;
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int element;
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// Process initial portion of scanline
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int i = 0;
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while ((i < w) && ((bitnum & 7) != 0)) {
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int shift = shiftOffset - (bitnum & 7);
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outData[outindex++] =
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(byte)(bitMask & (data[index + (bitnum >> 3)] >> shift));
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bitnum += pixbits;
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i++;
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}
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// Process central portion of scanline 8 pixels at a time
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int inIndex = index + (bitnum >> 3);
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switch (pixbits) {
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case 1:
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for (; i < w - 7; i += 8) {
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element = data[inIndex++];
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outData[outindex++] = (byte)((element >> 7) & 1);
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outData[outindex++] = (byte)((element >> 6) & 1);
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outData[outindex++] = (byte)((element >> 5) & 1);
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outData[outindex++] = (byte)((element >> 4) & 1);
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outData[outindex++] = (byte)((element >> 3) & 1);
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outData[outindex++] = (byte)((element >> 2) & 1);
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outData[outindex++] = (byte)((element >> 1) & 1);
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outData[outindex++] = (byte)(element & 1);
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bitnum += 8;
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}
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break;
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case 2:
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for (; i < w - 7; i += 8) {
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element = data[inIndex++];
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outData[outindex++] = (byte)((element >> 6) & 3);
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outData[outindex++] = (byte)((element >> 4) & 3);
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outData[outindex++] = (byte)((element >> 2) & 3);
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outData[outindex++] = (byte)(element & 3);
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element = data[inIndex++];
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outData[outindex++] = (byte)((element >> 6) & 3);
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outData[outindex++] = (byte)((element >> 4) & 3);
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outData[outindex++] = (byte)((element >> 2) & 3);
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outData[outindex++] = (byte)(element & 3);
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bitnum += 16;
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}
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break;
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case 4:
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for (; i < w - 7; i += 8) {
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element = data[inIndex++];
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outData[outindex++] = (byte)((element >> 4) & 0xf);
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outData[outindex++] = (byte)(element & 0xf);
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element = data[inIndex++];
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outData[outindex++] = (byte)((element >> 4) & 0xf);
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outData[outindex++] = (byte)(element & 0xf);
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element = data[inIndex++];
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outData[outindex++] = (byte)((element >> 4) & 0xf);
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outData[outindex++] = (byte)(element & 0xf);
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element = data[inIndex++];
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outData[outindex++] = (byte)((element >> 4) & 0xf);
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outData[outindex++] = (byte)(element & 0xf);
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bitnum += 32;
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}
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break;
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}
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// Process final portion of scanline
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for (; i < w; i++) {
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int shift = shiftOffset - (bitnum & 7);
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outData[outindex++] =
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(byte) (bitMask & (data[index + (bitnum >> 3)] >> shift));
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bitnum += pixbits;
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}
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index += scanlineStride;
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}
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return outData;
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}
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/**
|
|
* Stores the data elements at the specified location.
|
|
* An ArrayIndexOutOfBounds exception will be thrown at runtime
|
|
* if the pixel coordinate is out of bounds.
|
|
* A ClassCastException will be thrown if the input object is non null
|
|
* and references anything other than an array of transferType.
|
|
* @param x The X coordinate of the pixel location.
|
|
* @param y The Y coordinate of the pixel location.
|
|
* @param obj An object reference to an array of type defined by
|
|
* getTransferType() and length getNumDataElements()
|
|
* containing the pixel data to place at x,y.
|
|
*/
|
|
public void setDataElements(int x, int y, Object obj) {
|
|
if ((x < this.minX) || (y < this.minY) ||
|
|
(x >= this.maxX) || (y >= this.maxY)) {
|
|
throw new ArrayIndexOutOfBoundsException
|
|
("Coordinate out of bounds!");
|
|
}
|
|
byte[] inData = (byte[])obj;
|
|
int bitnum = dataBitOffset + (x-minX) * pixelBitStride;
|
|
int index = (y-minY) * scanlineStride + (bitnum >> 3);
|
|
int shift = shiftOffset - (bitnum & 7);
|
|
|
|
byte element = data[index];
|
|
element &= ~(bitMask << shift);
|
|
element |= (inData[0] & bitMask) << shift;
|
|
data[index] = element;
|
|
|
|
markDirty();
|
|
}
|
|
|
|
/**
|
|
* Stores the Raster data at the specified location.
|
|
* An ArrayIndexOutOfBounds exception will be thrown at runtime
|
|
* if the pixel coordinates are out of bounds.
|
|
* @param x The X coordinate of the pixel location.
|
|
* @param y The Y coordinate of the pixel location.
|
|
* @param inRaster Raster of data to place at x,y location.
|
|
*/
|
|
public void setDataElements(int x, int y, Raster inRaster) {
|
|
// Check if we can use fast code
|
|
if (!(inRaster instanceof BytePackedRaster) ||
|
|
((BytePackedRaster)inRaster).pixelBitStride != pixelBitStride) {
|
|
super.setDataElements(x, y, inRaster);
|
|
return;
|
|
}
|
|
|
|
int srcOffX = inRaster.getMinX();
|
|
int srcOffY = inRaster.getMinY();
|
|
int dstOffX = srcOffX + x;
|
|
int dstOffY = srcOffY + y;
|
|
int width = inRaster.getWidth();
|
|
int height = inRaster.getHeight();
|
|
if ((dstOffX < this.minX) || (dstOffY < this.minY) ||
|
|
(dstOffX + width > this.maxX) || (dstOffY + height > this.maxY)) {
|
|
throw new ArrayIndexOutOfBoundsException
|
|
("Coordinate out of bounds!");
|
|
}
|
|
setDataElements(dstOffX, dstOffY,
|
|
srcOffX, srcOffY,
|
|
width, height,
|
|
(BytePackedRaster)inRaster);
|
|
}
|
|
|
|
/**
|
|
* Stores the Raster data at the specified location.
|
|
* @param dstX The absolute X coordinate of the destination pixel
|
|
* that will receive a copy of the upper-left pixel of the
|
|
* inRaster
|
|
* @param dstY The absolute Y coordinate of the destination pixel
|
|
* that will receive a copy of the upper-left pixel of the
|
|
* inRaster
|
|
* @param srcX The absolute X coordinate of the upper-left source
|
|
* pixel that will be copied into this Raster
|
|
* @param srcY The absolute Y coordinate of the upper-left source
|
|
* pixel that will be copied into this Raster
|
|
* @param width The number of pixels to store horizontally
|
|
* @param height The number of pixels to store vertically
|
|
* @param inRaster BytePackedRaster of data to place at x,y location.
|
|
*/
|
|
private void setDataElements(int dstX, int dstY,
|
|
int srcX, int srcY,
|
|
int width, int height,
|
|
BytePackedRaster inRaster) {
|
|
// Assume bounds checking has been performed previously
|
|
if (width <= 0 || height <= 0) {
|
|
return;
|
|
}
|
|
|
|
byte[] inData = inRaster.data;
|
|
byte[] outData = this.data;
|
|
|
|
int inscan = inRaster.scanlineStride;
|
|
int outscan = this.scanlineStride;
|
|
int inbit = inRaster.dataBitOffset +
|
|
8 * (srcY - inRaster.minY) * inscan +
|
|
(srcX - inRaster.minX) * inRaster.pixelBitStride;
|
|
int outbit = (this.dataBitOffset +
|
|
8 * (dstY - minY) * outscan +
|
|
(dstX - minX) * this.pixelBitStride);
|
|
int copybits = width * pixelBitStride;
|
|
|
|
// Check whether the same bit alignment is present in both
|
|
// Rasters; if so, we can copy whole bytes using
|
|
// System.arraycopy. If not, we must do a "funnel shift"
|
|
// where adjacent bytes contribute to each destination byte.
|
|
if ((inbit & 7) == (outbit & 7)) {
|
|
// copy is bit aligned
|
|
int bitpos = outbit & 7;
|
|
if (bitpos != 0) {
|
|
int bits = 8 - bitpos;
|
|
// Copy partial bytes on left
|
|
int inbyte = inbit >> 3;
|
|
int outbyte = outbit >> 3;
|
|
int mask = 0xff >> bitpos;
|
|
if (copybits < bits) {
|
|
// Fix bug 4399076: previously had '8 - copybits' instead
|
|
// of 'bits - copybits'.
|
|
//
|
|
// Prior to the this expression, 'mask' has its rightmost
|
|
// 'bits' bits set to '1'. We want it to have a total
|
|
// of 'copybits' bits set, therefore we want to introduce
|
|
// 'bits - copybits' zeroes on the right.
|
|
mask &= 0xff << (bits - copybits);
|
|
bits = copybits;
|
|
}
|
|
for (int j = 0; j < height; j++) {
|
|
int element = outData[outbyte];
|
|
element &= ~mask;
|
|
element |= (inData[inbyte] & mask);
|
|
outData[outbyte] = (byte) element;
|
|
inbyte += inscan;
|
|
outbyte += outscan;
|
|
}
|
|
inbit += bits;
|
|
outbit += bits;
|
|
copybits -= bits;
|
|
}
|
|
if (copybits >= 8) {
|
|
// Copy whole bytes
|
|
int inbyte = inbit >> 3;
|
|
int outbyte = outbit >> 3;
|
|
int copybytes = copybits >> 3;
|
|
if (copybytes == inscan && inscan == outscan) {
|
|
System.arraycopy(inData, inbyte,
|
|
outData, outbyte,
|
|
inscan * height);
|
|
} else {
|
|
for (int j = 0; j < height; j++) {
|
|
System.arraycopy(inData, inbyte,
|
|
outData, outbyte,
|
|
copybytes);
|
|
inbyte += inscan;
|
|
outbyte += outscan;
|
|
}
|
|
}
|
|
|
|
int bits = copybytes*8;
|
|
inbit += bits;
|
|
outbit += bits;
|
|
copybits -= bits;
|
|
}
|
|
if (copybits > 0) {
|
|
// Copy partial bytes on right
|
|
int inbyte = inbit >> 3;
|
|
int outbyte = outbit >> 3;
|
|
int mask = (0xff00 >> copybits) & 0xff;
|
|
for (int j = 0; j < height; j++) {
|
|
int element = outData[outbyte];
|
|
element &= ~mask;
|
|
element |= (inData[inbyte] & mask);
|
|
outData[outbyte] = (byte) element;
|
|
inbyte += inscan;
|
|
outbyte += outscan;
|
|
}
|
|
}
|
|
} else {
|
|
// Unaligned case, see RFE #4284166
|
|
// Note that the code in that RFE is not correct
|
|
|
|
// Insert bits into the first byte of the output
|
|
// if either the starting bit position is not zero or
|
|
// we are writing fewer than 8 bits in total
|
|
int bitpos = outbit & 7;
|
|
if (bitpos != 0 || copybits < 8) {
|
|
int bits = 8 - bitpos;
|
|
int inbyte = inbit >> 3;
|
|
int outbyte = outbit >> 3;
|
|
|
|
int lshift = inbit & 7;
|
|
int rshift = 8 - lshift;
|
|
int mask = 0xff >> bitpos;
|
|
if (copybits < bits) {
|
|
// Fix mask if we're only writing a partial byte
|
|
mask &= 0xff << (bits - copybits);
|
|
bits = copybits;
|
|
}
|
|
int lastByte = inData.length - 1;
|
|
for (int j = 0; j < height; j++) {
|
|
// Read two bytes from the source if possible
|
|
// Don't worry about going over a scanline boundary
|
|
// since any extra bits won't get used anyway
|
|
byte inData0 = inData[inbyte];
|
|
byte inData1 = (byte)0;
|
|
if (inbyte < lastByte) {
|
|
inData1 = inData[inbyte + 1];
|
|
}
|
|
|
|
// Insert the new bits into the output
|
|
int element = outData[outbyte];
|
|
element &= ~mask;
|
|
element |= (((inData0 << lshift) |
|
|
((inData1 & 0xff) >> rshift))
|
|
>> bitpos) & mask;
|
|
outData[outbyte] = (byte)element;
|
|
inbyte += inscan;
|
|
outbyte += outscan;
|
|
}
|
|
|
|
inbit += bits;
|
|
outbit += bits;
|
|
copybits -= bits;
|
|
}
|
|
|
|
// Now we have outbit & 7 == 0 so we can write
|
|
// complete bytes for a while
|
|
|
|
// Make sure we have work to do in the central loop
|
|
// to avoid reading past the end of the scanline
|
|
if (copybits >= 8) {
|
|
int inbyte = inbit >> 3;
|
|
int outbyte = outbit >> 3;
|
|
int copybytes = copybits >> 3;
|
|
int lshift = inbit & 7;
|
|
int rshift = 8 - lshift;
|
|
|
|
for (int j = 0; j < height; j++) {
|
|
int ibyte = inbyte + j*inscan;
|
|
int obyte = outbyte + j*outscan;
|
|
|
|
int inData0 = inData[ibyte];
|
|
// Combine adjacent bytes while 8 or more bits left
|
|
for (int i = 0; i < copybytes; i++) {
|
|
int inData1 = inData[ibyte + 1];
|
|
int val = (inData0 << lshift) |
|
|
((inData1 & 0xff) >> rshift);
|
|
outData[obyte] = (byte)val;
|
|
inData0 = inData1;
|
|
|
|
++ibyte;
|
|
++obyte;
|
|
}
|
|
}
|
|
|
|
int bits = copybytes*8;
|
|
inbit += bits;
|
|
outbit += bits;
|
|
copybits -= bits;
|
|
}
|
|
|
|
// Finish last byte
|
|
if (copybits > 0) {
|
|
int inbyte = inbit >> 3;
|
|
int outbyte = outbit >> 3;
|
|
int mask = (0xff00 >> copybits) & 0xff;
|
|
int lshift = inbit & 7;
|
|
int rshift = 8 - lshift;
|
|
|
|
int lastByte = inData.length - 1;
|
|
for (int j = 0; j < height; j++) {
|
|
byte inData0 = inData[inbyte];
|
|
byte inData1 = (byte)0;
|
|
if (inbyte < lastByte) {
|
|
inData1 = inData[inbyte + 1];
|
|
}
|
|
|
|
// Insert the new bits into the output
|
|
int element = outData[outbyte];
|
|
element &= ~mask;
|
|
element |= ((inData0 << lshift) |
|
|
((inData1 & 0xff) >> rshift)) & mask;
|
|
outData[outbyte] = (byte)element;
|
|
|
|
inbyte += inscan;
|
|
outbyte += outscan;
|
|
}
|
|
}
|
|
}
|
|
|
|
markDirty();
|
|
}
|
|
|
|
/**
|
|
* Copies pixels from Raster srcRaster to this WritableRaster.
|
|
* For each (x, y) address in srcRaster, the corresponding pixel
|
|
* is copied to address (x+dx, y+dy) in this WritableRaster,
|
|
* unless (x+dx, y+dy) falls outside the bounds of this raster.
|
|
* srcRaster must have the same number of bands as this WritableRaster.
|
|
* The copy is a simple copy of source samples to the corresponding
|
|
* destination samples. For details, see
|
|
* {@link WritableRaster#setRect(Raster)}.
|
|
*
|
|
* @param dx The X translation factor from src space to dst space
|
|
* of the copy.
|
|
* @param dy The Y translation factor from src space to dst space
|
|
* of the copy.
|
|
* @param srcRaster The Raster from which to copy pixels.
|
|
*/
|
|
public void setRect(int dx, int dy, Raster srcRaster) {
|
|
// Check if we can use fast code
|
|
if (!(srcRaster instanceof BytePackedRaster) ||
|
|
((BytePackedRaster)srcRaster).pixelBitStride != pixelBitStride) {
|
|
super.setRect(dx, dy, srcRaster);
|
|
return;
|
|
}
|
|
|
|
int width = srcRaster.getWidth();
|
|
int height = srcRaster.getHeight();
|
|
int srcOffX = srcRaster.getMinX();
|
|
int srcOffY = srcRaster.getMinY();
|
|
int dstOffX = dx+srcOffX;
|
|
int dstOffY = dy+srcOffY;
|
|
|
|
// Clip to this raster
|
|
if (dstOffX < this.minX) {
|
|
int skipX = this.minX - dstOffX;
|
|
width -= skipX;
|
|
srcOffX += skipX;
|
|
dstOffX = this.minX;
|
|
}
|
|
if (dstOffY < this.minY) {
|
|
int skipY = this.minY - dstOffY;
|
|
height -= skipY;
|
|
srcOffY += skipY;
|
|
dstOffY = this.minY;
|
|
}
|
|
if (dstOffX+width > this.maxX) {
|
|
width = this.maxX - dstOffX;
|
|
}
|
|
if (dstOffY+height > this.maxY) {
|
|
height = this.maxY - dstOffY;
|
|
}
|
|
|
|
setDataElements(dstOffX, dstOffY,
|
|
srcOffX, srcOffY,
|
|
width, height,
|
|
(BytePackedRaster)srcRaster);
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
* 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 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) {
|
|
putByteData(x, y, w, h, (byte[])obj);
|
|
}
|
|
|
|
/**
|
|
* Stores a byte array of data elements into the specified rectangular
|
|
* region. The band index will be ignored.
|
|
* 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, is ignored.
|
|
* @param inData The data elements to be stored.
|
|
*/
|
|
public void putByteData(int x, int y, int w, int h,
|
|
int band, byte[] inData) {
|
|
putByteData(x, y, w, h, inData);
|
|
}
|
|
|
|
/**
|
|
* Stores a byte 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 inData The data elements to be stored.
|
|
*/
|
|
public void putByteData(int x, int y, int w, int h, byte[] inData) {
|
|
if ((x < this.minX) || (y < this.minY) ||
|
|
(x + w > this.maxX) || (y + h > this.maxY)) {
|
|
throw new ArrayIndexOutOfBoundsException
|
|
("Coordinate out of bounds!");
|
|
}
|
|
if (w == 0 || h == 0) {
|
|
return;
|
|
}
|
|
|
|
int pixbits = pixelBitStride;
|
|
int scanbit = dataBitOffset + (x - minX) * pixbits;
|
|
int index = (y - minY) * scanlineStride;
|
|
int outindex = 0;
|
|
byte[] data = this.data;
|
|
for (int j = 0; j < h; j++) {
|
|
int bitnum = scanbit;
|
|
int element;
|
|
|
|
// Process initial portion of scanline
|
|
int i = 0;
|
|
while ((i < w) && ((bitnum & 7) != 0)) {
|
|
int shift = shiftOffset - (bitnum & 7);
|
|
element = data[index + (bitnum >> 3)];
|
|
element &= ~(bitMask << shift);
|
|
element |= (inData[outindex++] & bitMask) << shift;
|
|
data[index + (bitnum >> 3)] = (byte)element;
|
|
|
|
bitnum += pixbits;
|
|
i++;
|
|
}
|
|
|
|
// Process central portion of scanline 8 pixels at a time
|
|
int inIndex = index + (bitnum >> 3);
|
|
switch (pixbits) {
|
|
case 1:
|
|
for (; i < w - 7; i += 8) {
|
|
element = (inData[outindex++] & 1) << 7;
|
|
element |= (inData[outindex++] & 1) << 6;
|
|
element |= (inData[outindex++] & 1) << 5;
|
|
element |= (inData[outindex++] & 1) << 4;
|
|
element |= (inData[outindex++] & 1) << 3;
|
|
element |= (inData[outindex++] & 1) << 2;
|
|
element |= (inData[outindex++] & 1) << 1;
|
|
element |= (inData[outindex++] & 1);
|
|
|
|
data[inIndex++] = (byte)element;
|
|
|
|
bitnum += 8;
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
for (; i < w - 7; i += 8) {
|
|
element = (inData[outindex++] & 3) << 6;
|
|
element |= (inData[outindex++] & 3) << 4;
|
|
element |= (inData[outindex++] & 3) << 2;
|
|
element |= (inData[outindex++] & 3);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
element = (inData[outindex++] & 3) << 6;
|
|
element |= (inData[outindex++] & 3) << 4;
|
|
element |= (inData[outindex++] & 3) << 2;
|
|
element |= (inData[outindex++] & 3);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
bitnum += 16;
|
|
}
|
|
break;
|
|
|
|
case 4:
|
|
for (; i < w - 7; i += 8) {
|
|
element = (inData[outindex++] & 0xf) << 4;
|
|
element |= (inData[outindex++] & 0xf);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
element = (inData[outindex++] & 0xf) << 4;
|
|
element |= (inData[outindex++] & 0xf);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
element = (inData[outindex++] & 0xf) << 4;
|
|
element |= (inData[outindex++] & 0xf);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
element = (inData[outindex++] & 0xf) << 4;
|
|
element |= (inData[outindex++] & 0xf);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
bitnum += 32;
|
|
}
|
|
break;
|
|
}
|
|
|
|
// Process final portion of scanline
|
|
for (; i < w; i++) {
|
|
int shift = shiftOffset - (bitnum & 7);
|
|
|
|
element = data[index + (bitnum >> 3)];
|
|
element &= ~(bitMask << shift);
|
|
element |= (inData[outindex++] & bitMask) << shift;
|
|
data[index + (bitnum >> 3)] = (byte)element;
|
|
|
|
bitnum += pixbits;
|
|
}
|
|
|
|
index += scanlineStride;
|
|
}
|
|
|
|
markDirty();
|
|
}
|
|
|
|
/**
|
|
* Returns an int array containing all samples for a rectangle of pixels,
|
|
* one sample per array element.
|
|
* An ArrayIndexOutOfBoundsException may be thrown
|
|
* if the coordinates are not in bounds.
|
|
* @param x, y the coordinates of the upper-left pixel location
|
|
* @param w Width of the pixel rectangle
|
|
* @param h Height of the pixel rectangle
|
|
* @param iArray An optionally pre-allocated int array
|
|
* @return the samples for the specified rectangle of pixels.
|
|
*/
|
|
public int[] getPixels(int x, int y, int w, int h, int[] iArray) {
|
|
if ((x < this.minX) || (y < this.minY) ||
|
|
(x + w > this.maxX) || (y + h > this.maxY)) {
|
|
throw new ArrayIndexOutOfBoundsException
|
|
("Coordinate out of bounds!");
|
|
}
|
|
if (iArray == null) {
|
|
iArray = new int[w * h];
|
|
}
|
|
int pixbits = pixelBitStride;
|
|
int scanbit = dataBitOffset + (x-minX) * pixbits;
|
|
int index = (y-minY) * scanlineStride;
|
|
int outindex = 0;
|
|
byte[] data = this.data;
|
|
|
|
for (int j = 0; j < h; j++) {
|
|
int bitnum = scanbit;
|
|
int element;
|
|
|
|
// Process initial portion of scanline
|
|
int i = 0;
|
|
while ((i < w) && ((bitnum & 7) != 0)) {
|
|
int shift = shiftOffset - (bitnum & 7);
|
|
iArray[outindex++] =
|
|
bitMask & (data[index + (bitnum >> 3)] >> shift);
|
|
bitnum += pixbits;
|
|
i++;
|
|
}
|
|
|
|
// Process central portion of scanline 8 pixels at a time
|
|
int inIndex = index + (bitnum >> 3);
|
|
switch (pixbits) {
|
|
case 1:
|
|
for (; i < w - 7; i += 8) {
|
|
element = data[inIndex++];
|
|
iArray[outindex++] = (element >> 7) & 1;
|
|
iArray[outindex++] = (element >> 6) & 1;
|
|
iArray[outindex++] = (element >> 5) & 1;
|
|
iArray[outindex++] = (element >> 4) & 1;
|
|
iArray[outindex++] = (element >> 3) & 1;
|
|
iArray[outindex++] = (element >> 2) & 1;
|
|
iArray[outindex++] = (element >> 1) & 1;
|
|
iArray[outindex++] = element & 1;
|
|
bitnum += 8;
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
for (; i < w - 7; i += 8) {
|
|
element = data[inIndex++];
|
|
iArray[outindex++] = (element >> 6) & 3;
|
|
iArray[outindex++] = (element >> 4) & 3;
|
|
iArray[outindex++] = (element >> 2) & 3;
|
|
iArray[outindex++] = element & 3;
|
|
|
|
element = data[inIndex++];
|
|
iArray[outindex++] = (element >> 6) & 3;
|
|
iArray[outindex++] = (element >> 4) & 3;
|
|
iArray[outindex++] = (element >> 2) & 3;
|
|
iArray[outindex++] = element & 3;
|
|
|
|
bitnum += 16;
|
|
}
|
|
break;
|
|
|
|
case 4:
|
|
for (; i < w - 7; i += 8) {
|
|
element = data[inIndex++];
|
|
iArray[outindex++] = (element >> 4) & 0xf;
|
|
iArray[outindex++] = element & 0xf;
|
|
|
|
element = data[inIndex++];
|
|
iArray[outindex++] = (element >> 4) & 0xf;
|
|
iArray[outindex++] = element & 0xf;
|
|
|
|
element = data[inIndex++];
|
|
iArray[outindex++] = (element >> 4) & 0xf;
|
|
iArray[outindex++] = element & 0xf;
|
|
|
|
element = data[inIndex++];
|
|
iArray[outindex++] = (element >> 4) & 0xf;
|
|
iArray[outindex++] = element & 0xf;
|
|
|
|
bitnum += 32;
|
|
}
|
|
break;
|
|
}
|
|
|
|
// Process final portion of scanline
|
|
for (; i < w; i++) {
|
|
int shift = shiftOffset - (bitnum & 7);
|
|
iArray[outindex++] =
|
|
bitMask & (data[index + (bitnum >> 3)] >> shift);
|
|
bitnum += pixbits;
|
|
}
|
|
|
|
index += scanlineStride;
|
|
}
|
|
|
|
return iArray;
|
|
}
|
|
|
|
/**
|
|
* Sets all samples for a rectangle of pixels from an int array containing
|
|
* one sample per array element.
|
|
* An ArrayIndexOutOfBoundsException may 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 Width of the pixel rectangle.
|
|
* @param h Height of the pixel rectangle.
|
|
* @param iArray The input int pixel array.
|
|
*/
|
|
public void setPixels(int x, int y, int w, int h, int[] iArray) {
|
|
if ((x < this.minX) || (y < this.minY) ||
|
|
(x + w > this.maxX) || (y + h > this.maxY)) {
|
|
throw new ArrayIndexOutOfBoundsException
|
|
("Coordinate out of bounds!");
|
|
}
|
|
int pixbits = pixelBitStride;
|
|
int scanbit = dataBitOffset + (x - minX) * pixbits;
|
|
int index = (y - minY) * scanlineStride;
|
|
int outindex = 0;
|
|
byte[] data = this.data;
|
|
for (int j = 0; j < h; j++) {
|
|
int bitnum = scanbit;
|
|
int element;
|
|
|
|
// Process initial portion of scanline
|
|
int i = 0;
|
|
while ((i < w) && ((bitnum & 7) != 0)) {
|
|
int shift = shiftOffset - (bitnum & 7);
|
|
element = data[index + (bitnum >> 3)];
|
|
element &= ~(bitMask << shift);
|
|
element |= (iArray[outindex++] & bitMask) << shift;
|
|
data[index + (bitnum >> 3)] = (byte)element;
|
|
|
|
bitnum += pixbits;
|
|
i++;
|
|
}
|
|
|
|
// Process central portion of scanline 8 pixels at a time
|
|
int inIndex = index + (bitnum >> 3);
|
|
switch (pixbits) {
|
|
case 1:
|
|
for (; i < w - 7; i += 8) {
|
|
element = (iArray[outindex++] & 1) << 7;
|
|
element |= (iArray[outindex++] & 1) << 6;
|
|
element |= (iArray[outindex++] & 1) << 5;
|
|
element |= (iArray[outindex++] & 1) << 4;
|
|
element |= (iArray[outindex++] & 1) << 3;
|
|
element |= (iArray[outindex++] & 1) << 2;
|
|
element |= (iArray[outindex++] & 1) << 1;
|
|
element |= (iArray[outindex++] & 1);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
bitnum += 8;
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
for (; i < w - 7; i += 8) {
|
|
element = (iArray[outindex++] & 3) << 6;
|
|
element |= (iArray[outindex++] & 3) << 4;
|
|
element |= (iArray[outindex++] & 3) << 2;
|
|
element |= (iArray[outindex++] & 3);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
element = (iArray[outindex++] & 3) << 6;
|
|
element |= (iArray[outindex++] & 3) << 4;
|
|
element |= (iArray[outindex++] & 3) << 2;
|
|
element |= (iArray[outindex++] & 3);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
bitnum += 16;
|
|
}
|
|
break;
|
|
|
|
case 4:
|
|
for (; i < w - 7; i += 8) {
|
|
element = (iArray[outindex++] & 0xf) << 4;
|
|
element |= (iArray[outindex++] & 0xf);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
element = (iArray[outindex++] & 0xf) << 4;
|
|
element |= (iArray[outindex++] & 0xf);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
element = (iArray[outindex++] & 0xf) << 4;
|
|
element |= (iArray[outindex++] & 0xf);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
element = (iArray[outindex++] & 0xf) << 4;
|
|
element |= (iArray[outindex++] & 0xf);
|
|
data[inIndex++] = (byte)element;
|
|
|
|
bitnum += 32;
|
|
}
|
|
break;
|
|
}
|
|
|
|
// Process final portion of scanline
|
|
for (; i < w; i++) {
|
|
int shift = shiftOffset - (bitnum & 7);
|
|
|
|
element = data[index + (bitnum >> 3)];
|
|
element &= ~(bitMask << shift);
|
|
element |= (iArray[outindex++] & bitMask) << shift;
|
|
data[index + (bitnum >> 3)] = (byte)element;
|
|
|
|
bitnum += pixbits;
|
|
}
|
|
|
|
index += scanlineStride;
|
|
}
|
|
|
|
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. Note that the subraster will reference the same
|
|
* DataBuffer as the parent raster, but using different offsets. The
|
|
* bandList is ignored.
|
|
* @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. The bandList is ignored.
|
|
* A translation to the subRaster may also be specified.
|
|
* Note that the subRaster will reference the same
|
|
* DataBuffer 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 BytePackedRaster(sm,
|
|
(DataBufferByte) 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 BytePackedRaster(sm, new Point(0,0));
|
|
}
|
|
|
|
/**
|
|
* Creates a raster with the same layout and the same
|
|
* width and height, and with new zeroed data arrays.
|
|
*/
|
|
public WritableRaster createCompatibleWritableRaster () {
|
|
return createCompatibleWritableRaster(width,height);
|
|
}
|
|
|
|
/**
|
|
* Verify that the layout parameters are consistent with
|
|
* the data. If strictCheck
|
|
* is false, this method will check for ArrayIndexOutOfBounds conditions.
|
|
* If strictCheck is true, this method will check for additional error
|
|
* conditions such as line wraparound (width of a line greater than
|
|
* the scanline stride).
|
|
* @return String Error string, if the layout is incompatible with
|
|
* the data. Otherwise returns null.
|
|
*/
|
|
private void verify (boolean strictCheck) {
|
|
// Make sure data for Raster is in a legal range
|
|
if (dataBitOffset < 0) {
|
|
throw new RasterFormatException("Data offsets must be >= 0");
|
|
}
|
|
|
|
/* Need to re-verify the dimensions since a sample model may be
|
|
* specified to the constructor
|
|
*/
|
|
if (width <= 0 || height <= 0 ||
|
|
height > (Integer.MAX_VALUE / width))
|
|
{
|
|
throw new RasterFormatException("Invalid raster dimension");
|
|
}
|
|
|
|
|
|
/*
|
|
* pixelBitstride was verified in constructor, so just make
|
|
* sure that it is safe to multiply it by width.
|
|
*/
|
|
if ((width - 1) > Integer.MAX_VALUE / pixelBitStride) {
|
|
throw new RasterFormatException("Invalid raster dimension");
|
|
}
|
|
|
|
if ((long)minX - sampleModelTranslateX < 0 ||
|
|
(long)minY - sampleModelTranslateY < 0) {
|
|
|
|
throw new RasterFormatException("Incorrect origin/translate: (" +
|
|
minX + ", " + minY + ") / (" +
|
|
sampleModelTranslateX + ", " + sampleModelTranslateY + ")");
|
|
}
|
|
|
|
if (scanlineStride < 0 ||
|
|
scanlineStride > (Integer.MAX_VALUE / height))
|
|
{
|
|
throw new RasterFormatException("Invalid scanline stride");
|
|
}
|
|
|
|
if (height > 1 || minY - sampleModelTranslateY > 0) {
|
|
// buffer should contain at least one scanline
|
|
if (scanlineStride > data.length) {
|
|
throw new RasterFormatException("Incorrect scanline stride: "
|
|
+ scanlineStride);
|
|
}
|
|
}
|
|
|
|
long lastbit = (long) dataBitOffset
|
|
+ (long) (height - 1) * (long) scanlineStride * 8
|
|
+ (long) (width - 1) * (long) pixelBitStride
|
|
+ (long) pixelBitStride - 1;
|
|
if (lastbit < 0 || lastbit / 8 >= data.length) {
|
|
throw new RasterFormatException("raster dimensions overflow " +
|
|
"array bounds");
|
|
}
|
|
if (strictCheck) {
|
|
if (height > 1) {
|
|
lastbit = width * pixelBitStride - 1;
|
|
if (lastbit / 8 >= scanlineStride) {
|
|
throw new RasterFormatException("data for adjacent" +
|
|
" scanlines overlaps");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public String toString() {
|
|
return "BytePackedRaster: width = " + width
|
|
+ " height = " + height
|
|
+ " #channels " + numBands
|
|
+ " xOff = " + sampleModelTranslateX
|
|
+ " yOff = " + sampleModelTranslateY;
|
|
}
|
|
}
|