| /* |
| * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.awt.image; |
| import java.awt.image.Raster; |
| import java.awt.image.WritableRaster; |
| import java.awt.image.RasterFormatException; |
| import java.awt.image.SampleModel; |
| import java.awt.image.BandedSampleModel; |
| import java.awt.image.DataBuffer; |
| import java.awt.image.DataBufferByte; |
| import java.awt.Rectangle; |
| import java.awt.Point; |
| |
| /** |
| * This class defines a Raster with pixels consisting of multiple |
| * 8-bit samples stored in possibly separate arrays for each band. |
| * Operations on sets of pixels are performed on a given band in the |
| * Raster before moving on to the next band. The arrays used for |
| * storage may be distinct or shared between some or all of the bands. |
| * Each band additionally has an offset that is added to determine the |
| * DataBuffer location of each pixel. |
| * |
| * There is only one scanline stride for all bands. The pixel stride |
| * is always equal to one. This type of raster can be used with a |
| * ComponentColorModel. This class requires a BandedSampleModel. |
| * |
| */ |
| public class ByteBandedRaster extends SunWritableRaster { |
| |
| /** Data offsets for each band of image data. */ |
| int[] dataOffsets; |
| |
| /** Scanline stride of the image data contained in this Raster. */ |
| int scanlineStride; |
| |
| /** The image data array. */ |
| byte[][] data; |
| |
| /** A cached copy of minX + width for use in bounds checks. */ |
| private int maxX; |
| |
| /** A cached copy of minY + height for use in bounds checks. */ |
| private int maxY; |
| |
| /** |
| * Constructs a ByteBandedRaster with the given sampleModel. The |
| * Raster's upper left corner is origin and it is the same |
| * size as the SampleModel. A dataBuffer large |
| * enough to describe the Raster is automatically created. SampleModel |
| * must be of type BandedSampleModel. |
| * @param sampleModel The SampleModel that specifies the layout. |
| * @param origin The Point that specifies the origin. |
| */ |
| public ByteBandedRaster(SampleModel sampleModel, |
| Point origin) { |
| this(sampleModel, |
| sampleModel.createDataBuffer(), |
| new Rectangle(origin.x, |
| origin.y, |
| sampleModel.getWidth(), |
| sampleModel.getHeight()), |
| origin, |
| null); |
| } |
| |
| /** |
| * Constructs a ByteBanded Raster with the given sampleModel |
| * and DataBuffer. The Raster's upper left corner is origin and |
| * it is the same size as the SampleModel. The DataBuffer is not |
| * initialized and must be a DataBufferShort compatible with SampleModel. |
| * SampleModel must be of type BandedSampleModel. |
| * @param sampleModel The SampleModel that specifies the layout. |
| * @param dataBuffer The DataBufferShort that contains the image data. |
| * @param origin The Point that specifies the origin. |
| */ |
| public ByteBandedRaster(SampleModel sampleModel, |
| DataBuffer dataBuffer, |
| Point origin) { |
| this(sampleModel, dataBuffer, |
| new Rectangle(origin.x , origin.y, |
| sampleModel.getWidth(), |
| sampleModel.getHeight()), |
| origin, null); |
| } |
| |
| /** |
| * Constructs a ByteBandedRaster with the given sampleModel, |
| * DataBuffer, and parent. DataBuffer must be a DataBufferShort and |
| * SampleModel must be of type BandedSampleModel. |
| * When translated into the base Raster's |
| * coordinate system, aRegion must be contained by the base Raster. |
| * Origin is the coordinate in the new Raster's coordinate system of |
| * the origin of the base Raster. (The base Raster is the Raster's |
| * ancestor which has no parent.) |
| * |
| * Note that this constructor should generally be called by other |
| * constructors or create methods, it should not be used directly. |
| * @param sampleModel The SampleModel that specifies the layout. |
| * @param dataBuffer The DataBufferShort that contains the image data. |
| * @param aRegion The Rectangle that specifies the image area. |
| * @param origin The Point that specifies the origin. |
| * @param parent The parent (if any) of this raster. |
| */ |
| public ByteBandedRaster(SampleModel sampleModel, |
| DataBuffer dataBuffer, |
| Rectangle aRegion, |
| Point origin, |
| ByteBandedRaster parent) { |
| |
| super(sampleModel, dataBuffer, aRegion, origin, parent); |
| this.maxX = minX + width; |
| this.maxY = minY + height; |
| |
| if (!(dataBuffer instanceof DataBufferByte)) { |
| throw new RasterFormatException("ByteBandedRaster must have" + |
| "byte DataBuffers"); |
| } |
| DataBufferByte dbb = (DataBufferByte)dataBuffer; |
| |
| if (sampleModel instanceof BandedSampleModel) { |
| BandedSampleModel bsm = (BandedSampleModel)sampleModel; |
| this.scanlineStride = bsm.getScanlineStride(); |
| int bankIndices[] = bsm.getBankIndices(); |
| int bandOffsets[] = bsm.getBandOffsets(); |
| int dOffsets[] = dbb.getOffsets(); |
| dataOffsets = new int[bankIndices.length]; |
| data = new byte[bankIndices.length][]; |
| int xOffset = aRegion.x - origin.x; |
| int yOffset = aRegion.y - origin.y; |
| for (int i = 0; i < bankIndices.length; i++) { |
| data[i] = stealData(dbb, bankIndices[i]); |
| dataOffsets[i] = dOffsets[bankIndices[i]] + |
| xOffset + yOffset*scanlineStride + bandOffsets[i]; |
| } |
| } else { |
| throw new RasterFormatException("ByteBandedRasters must have"+ |
| "BandedSampleModels"); |
| } |
| verify(false); |
| } |
| |
| |
| /** |
| * Returns a copy of the data offsets array. For each band the data |
| * offset is the index into the band's data array, of the first sample |
| * of the band. |
| */ |
| public int[] getDataOffsets() { |
| return (int[])dataOffsets.clone(); |
| } |
| |
| /** |
| * Returns data offset for the specified band. The data offset |
| * is the index into the band's data array |
| * in which the first sample of the first scanline is stored. |
| * @param The band whose offset is returned. |
| */ |
| public int getDataOffset(int band) { |
| return dataOffsets[band]; |
| } |
| |
| /** |
| * Returns the scanline stride -- the number of data array elements |
| * between a given sample and the sample in the same column |
| * of the next row in the same band. |
| */ |
| public int getScanlineStride() { |
| return scanlineStride; |
| } |
| |
| /** |
| * Returns the pixel stride, which is always equal to one for |
| * a Raster with a BandedSampleModel. |
| */ |
| public int getPixelStride() { |
| return 1; |
| } |
| |
| /** |
| * Returns a reference to the entire data array. |
| */ |
| public byte[][] getDataStorage() { |
| return data; |
| } |
| |
| /** |
| * Returns a reference to the specific band data array. |
| */ |
| public byte[] getDataStorage(int band) { |
| return data[band]; |
| } |
| |
| /** |
| * Returns the data elements for all bands 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 outData An object reference to an array of type defined by |
| * getTransferType() and length getNumDataElements(). |
| * If null an array of appropriate type and size will be |
| * allocated. |
| * @return An object reference to an array of type defined by |
| * getTransferType() with the request pixel data. |
| */ |
| public Object getDataElements(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 outData[]; |
| if (obj == null) { |
| outData = new byte[numDataElements]; |
| } else { |
| outData = (byte[])obj; |
| } |
| int off = (y-minY)*scanlineStride + (x-minX); |
| |
| for (int band = 0; band < numDataElements; band++) { |
| outData[band] = data[band][dataOffsets[band] + off]; |
| } |
| |
| return outData; |
| } |
| |
| /** |
| * Returns an array of data elements from 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. |
| * <pre> |
| * byte[] bandData = (byte[])raster.getDataElement(x, y, w, h, null); |
| * int numDataElements = raster.getNumDataElements(); |
| * byte[] pixel = new byte[numDataElements]; |
| * // To find a data element at location (x2, y2) |
| * System.arraycopy(bandData, ((y2-y)*w + (x2-x))*numDataElements, |
| * pixel, 0, numDataElements); |
| * </pre> |
| * @param x The X coordinate of the upper left pixel location. |
| * @param y The Y coordinate of the upper left pixel location. |
| * @param width Width of the pixel rectangle. |
| * @param height Height of the pixel rectangle. |
| * @param outData An object reference to an array of type defined by |
| * getTransferType() and length w*h*getNumDataElements(). |
| * If null an array of appropriate type and size will be |
| * allocated. |
| * @return An object reference to an array of type defined by |
| * getTransferType() with the request pixel data. |
| */ |
| public Object getDataElements(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!"); |
| } |
| byte outData[]; |
| if (obj == null) { |
| outData = new byte[numDataElements*w*h]; |
| } else { |
| outData = (byte[])obj; |
| } |
| int yoff = (y-minY)*scanlineStride + (x-minX); |
| |
| for (int c = 0; c < numDataElements; c++) { |
| int off = c; |
| byte[] bank = data[c]; |
| int dataOffset = dataOffsets[c]; |
| |
| int yoff2 = yoff; |
| for (int ystart=0; ystart < h; ystart++, yoff2 += scanlineStride) { |
| int xoff = dataOffset + yoff2; |
| for (int xstart=0; xstart < w; xstart++) { |
| outData[off] = bank[xoff++]; |
| off += numDataElements; |
| } |
| } |
| } |
| |
| return outData; |
| } |
| |
| /** |
| * Returns a byte array of data elements from the specified rectangular |
| * region for the specified band. |
| * An ArrayIndexOutOfBounds exception will be thrown at runtime |
| * if the pixel coordinates are out of bounds. |
| * <pre> |
| * byte[] bandData = raster.getByteData(x, y, w, h, null); |
| * // To find the data element at location (x2, y2) |
| * byte bandElement = bandData[((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 width Width of the pixel rectangle. |
| * @param height Height of the pixel rectangle. |
| * @param band The band to return. |
| * @param outData If non-null, data elements for all bands |
| * at the specified location are returned in this array. |
| * @return Data array with data elements for all bands. |
| */ |
| public byte[] getByteData(int x, int y, int w, int h, |
| int band, byte[] outData) { |
| // 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!"); |
| } |
| if (outData == null) { |
| outData = new byte[scanlineStride*h]; |
| } |
| int yoff = (y-minY)*scanlineStride + (x-minX) + dataOffsets[band]; |
| |
| if (scanlineStride == w) { |
| System.arraycopy(data[band], yoff, outData, 0, w*h); |
| } else { |
| int off = 0; |
| for (int ystart=0; ystart < h; ystart++, yoff += scanlineStride) { |
| System.arraycopy(data[band], yoff, outData, off, w); |
| off += w; |
| } |
| } |
| |
| return outData; |
| } |
| |
| /** |
| * Returns a byte array of data elements from the specified rectangular |
| * region. |
| * An ArrayIndexOutOfBounds exception will be thrown at runtime |
| * if the pixel coordinates are out of bounds. |
| * <pre> |
| * byte[] bandData = raster.getByteData(x, y, w, h, null); |
| * int numDataElements = raster.getNumDataElements(); |
| * byte[] pixel = new byte[numDataElements]; |
| * // To find a data element at location (x2, y2) |
| * System.arraycopy(bandData, ((y2-y)*w + (x2-x))*numDataElements, |
| * pixel, 0, numDataElements); |
| * </pre> |
| * @param x The X coordinate of the upper left pixel location. |
| * @param y The Y coordinate of the upper left pixel location. |
| * @param width Width of the pixel rectangle. |
| * @param height Height of the pixel rectangle. |
| * @param outData If non-null, data elements for all bands |
| * at the specified location are returned in this array. |
| * @return Data array with data elements for all bands. |
| */ |
| public byte[] getByteData(int x, int y, int w, int h, byte[] outData) { |
| if ((x < this.minX) || (y < this.minY) || |
| (x + w > this.maxX) || (y + h > this.maxY)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| if (outData == null) { |
| outData = new byte[numDataElements*scanlineStride*h]; |
| } |
| int yoff = (y-minY)*scanlineStride + (x-minX); |
| |
| for (int c = 0; c < numDataElements; c++) { |
| int off = c; |
| byte[] bank = data[c]; |
| int dataOffset = dataOffsets[c]; |
| |
| // REMIND: Should keep track if dataoffsets are in a nice order |
| int yoff2 = yoff; |
| for (int ystart=0; ystart < h; ystart++, yoff2 += scanlineStride) { |
| int xoff = dataOffset + yoff2; |
| for (int xstart=0; xstart < w; xstart++) { |
| outData[off] = bank[xoff++]; |
| off += numDataElements; |
| } |
| } |
| } |
| |
| return outData; |
| } |
| |
| /** |
| * Stores the data elements for all bands 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 inData 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 off = (y-minY)*scanlineStride + (x-minX); |
| for (int i = 0; i < numDataElements; i++) { |
| data[i][dataOffsets[i] + off] = inData[i]; |
| } |
| markDirty(); |
| } |
| |
| /** |
| * Stores the Raster data at the specified location. |
| * An ArrayIndexOutOfBounds exception will be thrown at runtime |
| * if the pixel coordinate is 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) { |
| int dstOffX = inRaster.getMinX() + x; |
| int dstOffY = inRaster.getMinY() + 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, width, height, 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 width The number of pixels to store horizontally |
| * @param height The number of pixels to store vertically |
| * @param inRaster Raster of data to place at x,y location. |
| */ |
| 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; |
| } |
| |
| int srcOffX = inRaster.getMinX(); |
| int srcOffY = inRaster.getMinY(); |
| Object tdata = null; |
| |
| // // REMIND: Do something faster! |
| // if (inRaster instanceof ByteBandedRaster) { |
| // } |
| |
| 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 inData 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!"); |
| } |
| byte inData[] = (byte[])obj; |
| int yoff = (y-minY)*scanlineStride + (x-minX); |
| |
| for (int c = 0; c < numDataElements; c++) { |
| int off = c; |
| byte[] bank = data[c]; |
| int dataOffset = dataOffsets[c]; |
| |
| int yoff2 = yoff; |
| for (int ystart=0; ystart < h; ystart++, yoff2 += scanlineStride) { |
| int xoff = dataOffset + yoff2; |
| for (int xstart=0; xstart < w; xstart++) { |
| bank[xoff++] = inData[off]; |
| off += numDataElements; |
| } |
| } |
| } |
| |
| markDirty(); |
| } |
| |
| /** |
| * 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 |
| * 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 band The band to set. |
| * @param inData The data elements to be stored. |
| */ |
| public void putByteData(int x, int y, int w, int h, |
| int band, byte[] 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) + dataOffsets[band]; |
| int xoff; |
| int off = 0; |
| int xstart; |
| int ystart; |
| |
| if (scanlineStride == w) { |
| System.arraycopy(inData, 0, data[band], yoff, w*h); |
| } else { |
| for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) { |
| System.arraycopy(inData, off, data[band], yoff, w); |
| off += w; |
| } |
| } |
| |
| markDirty(); |
| } |
| |
| /** |
| * 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 |
| * 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 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!"); |
| } |
| int yoff = (y-minY)*scanlineStride + (x-minX); |
| |
| for (int c = 0; c < numDataElements; c++) { |
| int off = c; |
| byte[] bank = data[c]; |
| int dataOffset = dataOffsets[c]; |
| |
| int yoff2 = yoff; |
| for (int ystart=0; ystart < h; ystart++, yoff2 += scanlineStride) { |
| int xoff = dataOffset + yoff2; |
| for (int xstart=0; xstart < w; xstart++) { |
| bank[xoff++] = inData[off]; |
| off += numDataElements; |
| } |
| } |
| } |
| |
| markDirty(); |
| } |
| |
| /** |
| * 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 of the subraster. |
| * @param height Height 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. |
| * @exception 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 raster"); |
| } |
| if (y < this.minY) { |
| throw new RasterFormatException("y lies outside raster"); |
| } |
| if ((x+width < x) || (x+width > this.width + this.minX)) { |
| throw new RasterFormatException("(x + width) is outside raster") ; |
| } |
| if ((y+height < y) || (y+height > this.height + this.minY)) { |
| throw new RasterFormatException("(y + height) is outside raster"); |
| } |
| |
| SampleModel sm; |
| |
| if (bandList != null) |
| sm = sampleModel.createSubsetSampleModel(bandList); |
| else |
| sm = sampleModel; |
| |
| int deltaX = x0 - x; |
| int deltaY = y0 - y; |
| |
| return new ByteBandedRaster(sm, |
| dataBuffer, |
| new Rectangle(x0,y0,width,height), |
| new Point(sampleModelTranslateX+deltaX, |
| sampleModelTranslateY+deltaY), |
| this); |
| } |
| |
| /** |
| * 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 |
| * 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. |
| * @exception 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[]) { |
| return createWritableChild(x, y, width, height, x0, y0, bandList); |
| } |
| |
| /** |
| * 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 ByteBandedRaster(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); |
| } |
| |
| /** |
| * 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 |
| for (int i=0; i < dataOffsets.length; i++) { |
| if (dataOffsets[i] < 0) { |
| throw new RasterFormatException("Data offsets for band "+i+ |
| "("+dataOffsets[i]+ |
| ") must be >= 0"); |
| } |
| } |
| |
| int maxSize = 0; |
| int size; |
| |
| for (int i=0; i < numDataElements; i++) { |
| size = (height-1)*scanlineStride + (width-1) + dataOffsets[i]; |
| if (size > maxSize) { |
| maxSize = size; |
| } |
| } |
| |
| if (data.length == 1) { |
| if (data[0].length < maxSize*numDataElements) { |
| throw new RasterFormatException("Data array too small "+ |
| "(it is "+data[0].length+ |
| " and should be "+ |
| (maxSize*numDataElements)+ |
| " )"); |
| } |
| } |
| else { |
| for (int i=0; i < numDataElements; i++) { |
| if (data[i].length < maxSize) { |
| throw new RasterFormatException("Data array too small "+ |
| "(it is "+data[i].length+ |
| " and should be "+ |
| maxSize+" )"); |
| } |
| } |
| } |
| } |
| |
| public String toString() { |
| return new String ("ByteBandedRaster: width = "+width+" height = " |
| + height |
| +" #bands "+numDataElements |
| +" minX = "+minX+" minY = "+minY); |
| } |
| |
| } |
