| /* |
| * Copyright (c) 1997, 2016, 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.MultiPixelPackedSampleModel; |
| import java.awt.image.DataBufferByte; |
| import java.awt.Rectangle; |
| import java.awt.Point; |
| |
| /** |
| * 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. |
| * |
| * @exception 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. |
| * @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) { |
| 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. |
| * @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 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 new String ("BytePackedRaster: width = "+width+" height = "+height |
| +" #channels "+numBands |
| +" xOff = "+sampleModelTranslateX |
| +" yOff = "+sampleModelTranslateY); |
| } |
| } |
