| /* | |
| * Copyright (c) 1997, 2021, 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.Point; | |
| import java.awt.Rectangle; | |
| import java.awt.image.DataBuffer; | |
| import java.awt.image.DataBufferByte; | |
| import java.awt.image.MultiPixelPackedSampleModel; | |
| import java.awt.image.Raster; | |
| import java.awt.image.RasterFormatException; | |
| import java.awt.image.SampleModel; | |
| import java.awt.image.WritableRaster; | |
| /** | |
| * This class is useful for describing 1, 2, or 4 bit image data | |
| * elements. This raster has one band whose pixels are packed | |
| * together into individual bytes in a single byte array. This type | |
| * of raster can be used with an IndexColorModel. This raster uses a | |
| * MultiPixelPackedSampleModel. | |
| * | |
| */ | |
| public class BytePackedRaster extends SunWritableRaster { | |
| /** The data bit offset for each pixel. */ | |
| int dataBitOffset; | |
| /** Scanline stride of the image data contained in this Raster. */ | |
| int scanlineStride; | |
| /** | |
| * The bit stride of a pixel, equal to the total number of bits | |
| * required to store a pixel. | |
| */ | |
| int pixelBitStride; | |
| /** The bit mask for extracting the pixel. */ | |
| int bitMask; | |
| /** The image data array. */ | |
| byte[] data; | |
| /** 8 minus the pixel bit stride. */ | |
| int shiftOffset; | |
| int type; | |
| /** 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; | |
| private static native void initIDs(); | |
| static { | |
| /* ensure that the necessary native libraries are loaded */ | |
| NativeLibLoader.loadLibraries(); | |
| initIDs(); | |
| } | |
| /** | |
| * Constructs a BytePackedRaster 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 | |
| * MultiPixelPackedSampleModel. | |
| * @param sampleModel The SampleModel that specifies the layout. | |
| * @param origin The Point that specified the origin. | |
| */ | |
| public BytePackedRaster(SampleModel sampleModel, Point origin) { | |
| this(sampleModel, | |
| (DataBufferByte) sampleModel.createDataBuffer(), | |
| new Rectangle(origin.x, | |
| origin.y, | |
| sampleModel.getWidth(), | |
| sampleModel.getHeight()), | |
| origin, | |
| null); | |
| } | |
| /** | |
| * Constructs a BytePackedRaster 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 DataBufferByte compatible with SampleModel. | |
| * SampleModel must be of type MultiPixelPackedSampleModel. | |
| * @param sampleModel The SampleModel that specifies the layout. | |
| * @param dataBuffer The DataBufferByte that contains the image data. | |
| * @param origin The Point that specifies the origin. | |
| */ | |
| public BytePackedRaster(SampleModel sampleModel, | |
| DataBufferByte dataBuffer, | |
| Point origin) | |
| { | |
| this(sampleModel, | |
| dataBuffer, | |
| new Rectangle(origin.x, | |
| origin.y, | |
| sampleModel.getWidth(), | |
| sampleModel.getHeight()), | |
| origin, | |
| null); | |
| } | |
| /** | |
| * Constructs a BytePackedRaster with the given SampleModel, | |
| * DataBuffer, and parent. DataBuffer must be a DataBufferByte and | |
| * SampleModel must be of type MultiPixelPackedSampleModel. | |
| * 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 DataBufferByte 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. | |
| * | |
| * @throws RasterFormatException if the parameters do not conform | |
| * to requirements of this Raster type. | |
| */ | |
| public BytePackedRaster(SampleModel sampleModel, | |
| DataBufferByte dataBuffer, | |
| Rectangle aRegion, | |
| Point origin, | |
| BytePackedRaster parent) | |
| { | |
| super(sampleModel,dataBuffer,aRegion,origin, parent); | |
| this.maxX = minX + width; | |
| this.maxY = minY + height; | |
| this.data = stealData(dataBuffer, 0); | |
| if (dataBuffer.getNumBanks() != 1) { | |
| throw new | |
| RasterFormatException("DataBuffer for BytePackedRasters"+ | |
| " must only have 1 bank."); | |
| } | |
| int dbOffset = dataBuffer.getOffset(); | |
| if (sampleModel instanceof MultiPixelPackedSampleModel) { | |
| MultiPixelPackedSampleModel mppsm = | |
| (MultiPixelPackedSampleModel)sampleModel; | |
| this.type = IntegerComponentRaster.TYPE_BYTE_BINARY_SAMPLES; | |
| pixelBitStride = mppsm.getPixelBitStride(); | |
| if (pixelBitStride != 1 && | |
| pixelBitStride != 2 && | |
| pixelBitStride != 4) { | |
| throw new RasterFormatException | |
| ("BytePackedRasters must have a bit depth of 1, 2, or 4"); | |
| } | |
| scanlineStride = mppsm.getScanlineStride(); | |
| dataBitOffset = mppsm.getDataBitOffset() + dbOffset*8; | |
| int xOffset = aRegion.x - origin.x; | |
| int yOffset = aRegion.y - origin.y; | |
| dataBitOffset += xOffset*pixelBitStride + yOffset*scanlineStride*8; | |
| bitMask = (1 << pixelBitStride) -1; | |
| shiftOffset = 8 - pixelBitStride; | |
| } else { | |
| throw new RasterFormatException("BytePackedRasters must have"+ | |
| "MultiPixelPackedSampleModel"); | |
| } | |
| verify(false); | |
| } | |
| /** | |
| * Returns the data bit offset for the Raster. The data | |
| * bit offset is the bit index into the data array element | |
| * corresponding to the first sample of the first scanline. | |
| */ | |
| public int getDataBitOffset() { | |
| return dataBitOffset; | |
| } | |
| /** | |
| * 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. | |
| */ | |
| public int getScanlineStride() { | |
| return scanlineStride; | |
| } | |
| /** | |
| * Returns pixel bit stride -- the number of bits between two | |
| * samples on the same scanline. | |
| */ | |
| public int getPixelBitStride() { | |
| return pixelBitStride; | |
| } | |
| /** | |
| * Returns a reference to the entire data array. | |
| */ | |
| public byte[] getDataStorage() { | |
| return data; | |
| } | |
| /** | |
| * Returns the data element 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(). | |
| * 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 bitnum = dataBitOffset + (x-minX) * pixelBitStride; | |
| // Fix 4184283 | |
| int element = data[(y-minY) * scanlineStride + (bitnum >> 3)] & 0xff; | |
| int shift = shiftOffset - (bitnum & 7); | |
| outData[0] = (byte)((element >> shift) & bitMask); | |
| return outData; | |
| } | |
| /** | |
| * Returns the pixel data for the specified rectangle of pixels in a | |
| * primitive array of type TransferType. | |
| * For image data supported by the Java 2D API, this | |
| * will be one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT, or | |
| * DataBuffer.TYPE_INT. Data may be returned in a packed format, | |
| * thus increasing efficiency for data transfers. | |
| * | |
| * An ArrayIndexOutOfBoundsException may be thrown | |
| * if the coordinates are not in bounds. | |
| * A ClassCastException will be thrown if the input object is non null | |
| * and references anything other than an array of TransferType. | |
| * @see java.awt.image.SampleModel#getDataElements(int, int, int, int, Object, DataBuffer) | |
| * @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 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 requested pixel data. | |
| */ | |
| public Object getDataElements(int x, int y, int w, int h, | |
| Object outData) { | |
| return getByteData(x, y, w, h, (byte[])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.getPixelData(x, y, w, h, null); | |
| * int pixel; | |
| * // To find a data element at location (x2, y2) | |
| * pixel = 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 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(). | |
| * 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 getPixelData(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 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; | |
| for (int i = 0; i < w; i++) { | |
| int shift = shiftOffset - (bitnum & 7); | |
| outData[outindex++] = | |
| (byte)(bitMask & (data[index + (bitnum >> 3)] >> shift)); | |
| bitnum += pixbits; | |
| } | |
| index += scanlineStride; | |
| } | |
| return outData; | |
| } | |
| /** | |
| * Returns a byte array containing the specified data elements | |
| * from the data array. The band index will be ignored. | |
| * An ArrayIndexOutOfBounds exception will be thrown at runtime | |
| * if the pixel coordinates are out of bounds. | |
| * <pre> | |
| * byte[] byteData = getByteData(x, y, band, w, h, null); | |
| * // To find a data element at location (x2, y2) | |
| * byte element = byteData[(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 return, is ignored. | |
| * @param outData If non-null, data elements | |
| * at the specified locations are returned in this array. | |
| * @return Byte array with data elements. | |
| */ | |
| public byte[] getByteData(int x, int y, int w, int h, | |
| int band, byte[] outData) { | |
| return getByteData(x, y, w, h, outData); | |
| } | |
| /** | |
| * Returns a byte array containing the specified data elements | |
| * from the data array. | |
| * An ArrayIndexOutOfBounds exception will be thrown at runtime | |
| * if the pixel coordinates are out of bounds. | |
| * <pre> | |
| * byte[] byteData = raster.getByteData(x, y, w, h, null); | |
| * byte pixel; | |
| * // To find a data element at location (x2, y2) | |
| * pixel = byteData[((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 outData If non-null, data elements | |
| * at the specified locations are returned in this array. | |
| * @return Byte array with data elements. | |
| */ | |
| 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[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); | |
| outData[outindex++] = | |
| (byte)(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++]; | |
| outData[outindex++] = (byte)((element >> 7) & 1); | |
| outData[outindex++] = (byte)((element >> 6) & 1); | |
| outData[outindex++] = (byte)((element >> 5) & 1); | |
| outData[outindex++] = (byte)((element >> 4) & 1); | |
| outData[outindex++] = (byte)((element >> 3) & 1); | |
| outData[outindex++] = (byte)((element >> 2) & 1); | |
| outData[outindex++] = (byte)((element >> 1) & 1); | |
| outData[outindex++] = (byte)(element & 1); | |
| bitnum += 8; | |
| } | |
| break; | |
| case 2: | |
| for (; i < w - 7; i += 8) { | |
| element = data[inIndex++]; | |
| outData[outindex++] = (byte)((element >> 6) & 3); | |
| outData[outindex++] = (byte)((element >> 4) & 3); | |
| outData[outindex++] = (byte)((element >> 2) & 3); | |
| outData[outindex++] = (byte)(element & 3); | |
| element = data[inIndex++]; | |
| outData[outindex++] = (byte)((element >> 6) & 3); | |
| outData[outindex++] = (byte)((element >> 4) & 3); | |
| outData[outindex++] = (byte)((element >> 2) & 3); | |
| outData[outindex++] = (byte)(element & 3); | |
| bitnum += 16; | |
| } | |
| break; | |
| case 4: | |
| for (; i < w - 7; i += 8) { | |
| element = data[inIndex++]; | |
| outData[outindex++] = (byte)((element >> 4) & 0xf); | |
| outData[outindex++] = (byte)(element & 0xf); | |
| element = data[inIndex++]; | |
| outData[outindex++] = (byte)((element >> 4) & 0xf); | |
| outData[outindex++] = (byte)(element & 0xf); | |
| element = data[inIndex++]; | |
| outData[outindex++] = (byte)((element >> 4) & 0xf); | |
| outData[outindex++] = (byte)(element & 0xf); | |
| element = data[inIndex++]; | |
| outData[outindex++] = (byte)((element >> 4) & 0xf); | |
| outData[outindex++] = (byte)(element & 0xf); | |
| bitnum += 32; | |
| } | |
| break; | |
| } | |
| // Process final portion of scanline | |
| for (; i < w; i++) { | |
| int shift = shiftOffset - (bitnum & 7); | |
| outData[outindex++] = | |
| (byte) (bitMask & (data[index + (bitnum >> 3)] >> shift)); | |
| bitnum += pixbits; | |
| } | |
| index += scanlineStride; | |
| } | |
| return outData; | |
| } | |
| /** | |
| * 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; | |
| } | |
| } |