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Diffstat (limited to 'libjava/java/awt/image/MultiPixelPackedSampleModel.java')
-rw-r--r-- | libjava/java/awt/image/MultiPixelPackedSampleModel.java | 388 |
1 files changed, 0 insertions, 388 deletions
diff --git a/libjava/java/awt/image/MultiPixelPackedSampleModel.java b/libjava/java/awt/image/MultiPixelPackedSampleModel.java deleted file mode 100644 index 18a6e555205..00000000000 --- a/libjava/java/awt/image/MultiPixelPackedSampleModel.java +++ /dev/null @@ -1,388 +0,0 @@ -/* Copyright (C) 2004 Free Software Foundation - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath 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 for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - -package java.awt.image; - -import gnu.java.awt.Buffers; - -/** - * MultiPixelPackedSampleModel provides a single band model that supports - * multiple pixels in a single unit. Pixels have 2^n bits and 2^k pixels fit - * per data element. - * - * @author Jerry Quinn (jlquinn@optonline.net) - */ -public class MultiPixelPackedSampleModel extends SampleModel -{ - private int scanlineStride; - private int[] bitMasks; - private int[] bitOffsets; - private int[] sampleSize; - private int dataBitOffset; - private int elemBits; - private int numberOfBits; - private int numElems; - - public MultiPixelPackedSampleModel(int dataType, int w, int h, - int numberOfBits) - { - this(dataType, w, h, numberOfBits, 0, 0); - } - - public MultiPixelPackedSampleModel(int dataType, int w, int h, - int numberOfBits, int scanlineStride, - int dataBitOffset) - { - super(dataType, w, h, 1); - - switch (dataType) - { - case DataBuffer.TYPE_BYTE: - elemBits = 8; - break; - case DataBuffer.TYPE_USHORT: - elemBits = 16; - break; - case DataBuffer.TYPE_INT: - elemBits = 32; - break; - default: - throw new IllegalArgumentException("MultiPixelPackedSampleModel" - + " unsupported dataType"); - } - - this.dataBitOffset = dataBitOffset; - - this.numberOfBits = numberOfBits; - if (numberOfBits > elemBits) - throw new RasterFormatException("MultiPixelPackedSampleModel pixel size" - + " larger than dataType"); - switch (numberOfBits) - { - case 1: case 2: case 4: case 8: case 16: case 32: break; - default: - throw new RasterFormatException("MultiPixelPackedSampleModel pixel" - + " size not 2^n bits"); - } - numElems = elemBits / numberOfBits; - - // Compute scan line large enough for w pixels. - if (scanlineStride == 0) - scanlineStride = ((dataBitOffset + w * numberOfBits) / elemBits); - this.scanlineStride = scanlineStride; - - - sampleSize = new int[1]; - sampleSize[0] = numberOfBits; - - bitMasks = new int[numElems]; - bitOffsets = new int[numElems]; - for (int i=0; i < numElems; i++) - { - bitOffsets[numElems - i- 1] = numberOfBits * i; - bitMasks[numElems - i - 1] = ((1 << numberOfBits) - 1) << - bitOffsets[numElems - i - 1]; - } - } - - public SampleModel createCompatibleSampleModel(int w, int h) - { - /* FIXME: We can avoid recalculation of bit offsets and sample - sizes here by passing these from the current instance to a - special private constructor. */ - return new MultiPixelPackedSampleModel(dataType, w, h, numberOfBits); - } - - - /** - * Creates a DataBuffer for holding pixel data in the format and - * layout described by this SampleModel. The returned buffer will - * consist of one single bank. - */ - public DataBuffer createDataBuffer() - { - int size; - - // FIXME: The comment refers to SinglePixelPackedSampleModel. See if the - // same can be done for MultiPixelPackedSampleModel. - // We can save (scanlineStride - width) pixels at the very end of - // the buffer. The Sun reference implementation (J2SE 1.3.1 and - // 1.4.1_01) seems to do this; tested with Mauve test code. - size = scanlineStride * height; - - return Buffers.createBuffer(getDataType(), size); - } - - - public int getNumDataElements() - { - return 1; - } - - public int[] getSampleSize() - { - return sampleSize; - } - - public int getSampleSize(int band) - { - return sampleSize[0]; - } - - public int getOffset(int x, int y) - { - return scanlineStride * y + ((dataBitOffset + x*numberOfBits) / elemBits); - } - - public int getBitOffset(int x) - { - return (dataBitOffset + x*numberOfBits) % elemBits; - } - - public int getDataBitOffset() - { - return dataBitOffset; - } - - public int getScanlineStride() - { - return scanlineStride; - } - - public int getPixelBitStride() - { - return numberOfBits; - } - - - public SampleModel createSubsetSampleModel(int[] bands) - { - int numBands = bands.length; - if (numBands != 1) - throw new RasterFormatException("MultiPixelPackedSampleModel only" - + " supports one band"); - - return new MultiPixelPackedSampleModel(dataType, width, height, - numberOfBits, scanlineStride, - dataBitOffset); - } - - /** - * Extract one pixel and return in an array of transfer type. - * - * Extracts the pixel at x, y from data and stores into the 0th index of the - * array obj, since there is only one band. If obj is null, a new array of - * getTransferType() is created. - * - * @param x The x-coordinate of the pixel rectangle to store in <code>obj</code>. - * @param y The y-coordinate of the pixel rectangle to store in <code>obj</code>. - * @param obj The primitive array to store the pixels into or null to force creation. - * @param data The DataBuffer that is the source of the pixel data. - * @return The primitive array containing the pixel data. - * @see java.awt.image.SampleModel#getDataElements(int, int, java.lang.Object, java.awt.image.DataBuffer) - */ - public Object getDataElements(int x, int y, Object obj, - DataBuffer data) - { - int pixel = getSample(x, y, 0, data); - switch (getTransferType()) - { - case DataBuffer.TYPE_BYTE: - if (obj == null) obj = new byte[1]; - ((byte[])obj)[0] = (byte)pixel; - return obj; - case DataBuffer.TYPE_USHORT: - if (obj == null) obj = new short[1]; - ((short[])obj)[0] = (short)pixel; - return obj; - case DataBuffer.TYPE_INT: - if (obj == null) obj = new int[1]; - ((int[])obj)[0] = pixel; - return obj; - default: - // Seems like the only sensible thing to do. - throw new ClassCastException(); - } - } - - public int[] getPixel(int x, int y, int[] iArray, DataBuffer data) - { - if (iArray == null) iArray = new int[1]; - iArray[0] = getSample(x, y, 0, data); - - return iArray; - } - - public int[] getPixels(int x, int y, int w, int h, int[] iArray, - DataBuffer data) - { - int offset = getOffset(x, y); - if (iArray == null) iArray = new int[w*h]; - int outOffset = 0; - for (y=0; y<h; y++) - { - int lineOffset = offset; - for (x=0; x<w;) - { - int samples = data.getElem(lineOffset++); - for (int b=0; b<numElems && x<w; b++) - { - iArray[outOffset++] = (samples & bitMasks[b]) >>> bitOffsets[b]; - x++; - } - } - offset += scanlineStride; - } - return iArray; - } - - public int getSample(int x, int y, int b, DataBuffer data) - { - int pos = - ((dataBitOffset + x * numberOfBits) % elemBits) / numberOfBits; - int offset = getOffset(x, y); - int samples = data.getElem(offset); - return (samples & bitMasks[pos]) >>> bitOffsets[pos]; - } - - /** - * Set the pixel at x, y to the value in the first element of the primitive - * array obj. - * - * @param x The x-coordinate of the data elements in <code>obj</code>. - * @param y The y-coordinate of the data elements in <code>obj</code>. - * @param obj The primitive array containing the data elements to set. - * @param data The DataBuffer to store the data elements into. - * @see java.awt.image.SampleModel#setDataElements(int, int, int, int, java.lang.Object, java.awt.image.DataBuffer) - */ - public void setDataElements(int x, int y, Object obj, DataBuffer data) - { - int transferType = getTransferType(); - if (getTransferType() != data.getDataType()) - { - throw new IllegalArgumentException("transfer type ("+ - getTransferType()+"), "+ - "does not match data "+ - "buffer type (" + - data.getDataType() + - ")."); - } - - int offset = getOffset(x, y); - - try - { - switch (transferType) - { - case DataBuffer.TYPE_BYTE: - { - DataBufferByte out = (DataBufferByte) data; - byte[] in = (byte[]) obj; - out.getData()[offset] = in[0]; - return; - } - case DataBuffer.TYPE_USHORT: - { - DataBufferUShort out = (DataBufferUShort) data; - short[] in = (short[]) obj; - out.getData()[offset] = in[0]; - return; - } - case DataBuffer.TYPE_INT: - { - DataBufferInt out = (DataBufferInt) data; - int[] in = (int[]) obj; - out.getData()[offset] = in[0]; - return; - } - default: - throw new ClassCastException("Unsupported data type"); - } - } - catch (ArrayIndexOutOfBoundsException aioobe) - { - String msg = "While writing data elements" + - ", x="+x+", y="+y+ - ", width="+width+", height="+height+ - ", scanlineStride="+scanlineStride+ - ", offset="+offset+ - ", data.getSize()="+data.getSize()+ - ", data.getOffset()="+data.getOffset()+ - ": " + - aioobe; - throw new ArrayIndexOutOfBoundsException(msg); - } - } - - public void setPixel(int x, int y, int[] iArray, DataBuffer data) - { - setSample(x, y, 0, iArray[0], data); - } - - public void setSample(int x, int y, int b, int s, DataBuffer data) - { - int bitpos = - ((dataBitOffset + x * numberOfBits) % elemBits) / numberOfBits; - int offset = getOffset(x, y); - - s = s << bitOffsets[bitpos]; - s = s & bitMasks[bitpos]; - - int sample = data.getElem(offset); - sample |= s; - data.setElem(offset, sample); - } - - /** - * Creates a String with some information about this SampleModel. - * @return A String describing this SampleModel. - * @see java.lang.Object#toString() - */ - public String toString() - { - StringBuffer result = new StringBuffer(); - result.append(getClass().getName()); - result.append("["); - result.append("scanlineStride=").append(scanlineStride); - for(int i=0; i < bitMasks.length; i+=1) - { - result.append(", mask[").append(i).append("]=0x").append(Integer.toHexString(bitMasks[i])); - } - - result.append("]"); - return result.toString(); - } -} |