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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/awt/image/BandedSampleModel.java | |
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Diffstat (limited to 'libjava/classpath/java/awt/image/BandedSampleModel.java')
-rw-r--r-- | libjava/classpath/java/awt/image/BandedSampleModel.java | 759 |
1 files changed, 759 insertions, 0 deletions
diff --git a/libjava/classpath/java/awt/image/BandedSampleModel.java b/libjava/classpath/java/awt/image/BandedSampleModel.java new file mode 100644 index 000000000..7df6c8548 --- /dev/null +++ b/libjava/classpath/java/awt/image/BandedSampleModel.java @@ -0,0 +1,759 @@ +/* Copyright (C) 2004, 2005, 2006, 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; +import gnu.java.lang.CPStringBuilder; + +/** + * A sample model that reads each sample value from a separate band in the + * {@link DataBuffer}. + * + * @author Jerry Quinn (jlquinn@optonline.net) + */ +public final class BandedSampleModel extends ComponentSampleModel +{ + private int[] bitMasks; + private int[] bitOffsets; + private int[] sampleSize; + private int dataBitOffset; + private int elemBits; + private int numberOfBits; + private int numElems; + + private static int[] createBankArray(int size) + { + int[] result = new int[size]; + for (int i = 0; i < size; i++) + result[i] = i; + return result; + } + + /** + * Creates a new <code>BandedSampleModel</code>. + * + * @param dataType the data buffer type. + * @param w the width (in pixels). + * @param h the height (in pixels). + * @param numBands the number of bands. + */ + public BandedSampleModel(int dataType, int w, int h, int numBands) + { + this(dataType, w, h, w, createBankArray(numBands), new int[numBands]); + } + + /** + * Creates a new <code>BandedSampleModel</code>. + * + * @param dataType the data buffer type. + * @param w the width (in pixels). + * @param h the height (in pixels). + * @param scanlineStride the number of data elements from a pixel in one + * row to the corresponding pixel in the next row. + * @param bankIndices the bank indices. + * @param bandOffsets the band offsets. + */ + public BandedSampleModel(int dataType, int w, int h, int scanlineStride, + int[] bankIndices, int[] bandOffsets) + { + super(dataType, w, h, 1, scanlineStride, bankIndices, bandOffsets); + } + + /** + * Creates a new data buffer that is compatible with this sample model. + * + * @return The new data buffer. + */ + public DataBuffer createDataBuffer() + { + int size = scanlineStride * height; + return Buffers.createBuffer(getDataType(), size, numBanks); + } + + /** + * Creates a new <code>SampleModel</code> that is compatible with this + * model and has the specified width and height. + * + * @param w the width (in pixels, must be greater than zero). + * @param h the height (in pixels, must be greater than zero). + * + * @return The new sample model. + * + * @throws IllegalArgumentException if <code>w</code> or <code>h</code> is + * not greater than zero. + * @throws IllegalArgumentException if <code>w * h</code> exceeds + * <code>Integer.MAX_VALUE</code>. + */ + public SampleModel createCompatibleSampleModel(int w, int h) + { + // NOTE: blackdown 1.4.1 sets all offsets to 0. Sun's 1.4.2 docs + // disagree. + + // Compress offsets so minimum is 0, others w*scanlineStride + int[] newoffsets = new int[bandOffsets.length]; + int[] order = new int[bandOffsets.length]; + for (int i = 0; i < bandOffsets.length; i++) + order[i] = i; + // FIXME: This is N^2, but not a big issue, unless there's a lot of + // bands... + for (int i = 0; i < bandOffsets.length; i++) + for (int j = i + 1; j < bandOffsets.length; j++) + if (bankIndices[order[i]] > bankIndices[order[j]] + || (bankIndices[order[i]] == bankIndices[order[j]] + && bandOffsets[order[i]] > bandOffsets[order[j]])) + { + int t = order[i]; order[i] = order[j]; order[j] = t; + } + int bank = 0; + int offset = 0; + for (int i = 0; i < bandOffsets.length; i++) + { + if (bankIndices[order[i]] != bank) + { + bank = bankIndices[order[i]]; + offset = 0; + } + newoffsets[order[i]] = offset; + offset += w * scanlineStride; + } + + return new BandedSampleModel(dataType, w, h, w, bankIndices, newoffsets); + } + + + public SampleModel createSubsetSampleModel(int[] bands) + { + if (bands.length > bankIndices.length) + throw new + RasterFormatException("BandedSampleModel createSubsetSampleModel too" + +" many bands"); + int[] newoff = new int[bands.length]; + int[] newbanks = new int[bands.length]; + for (int i = 0; i < bands.length; i++) + { + int b = bands[i]; + newoff[i] = bandOffsets[b]; + newbanks[i] = bankIndices[b]; + } + + return new BandedSampleModel(dataType, width, height, scanlineStride, + newbanks, newoff); + } + + /** + * Extract all samples of one pixel and return in an array of transfer type. + * + * Extracts the pixel at x, y from data and stores samples into the array + * obj. 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) + { + if (x < 0 || y < 0) + throw new ArrayIndexOutOfBoundsException( + "x and y must not be less than 0."); + int pixel = getSample(x, y, 0, data); + switch (getTransferType()) + { + case DataBuffer.TYPE_BYTE: + { + byte[] b = (byte[]) obj; + if (b == null) b = new byte[numBands]; + for (int i = 0; i < numBands; i++) + b[i] = (byte)getSample(x, y, i, data); + return b; + } + case DataBuffer.TYPE_SHORT: + case DataBuffer.TYPE_USHORT: + { + short[] b = (short[]) obj; + if (b == null) b = new short[numBands]; + for (int i = 0; i < numBands; i++) + b[i] = (short)getSample(x, y, i, data); + return b; + } + case DataBuffer.TYPE_INT: + { + int[] b = (int[]) obj; + if (b == null) b = new int[numBands]; + for (int i = 0; i < numBands; i++) + b[i] = getSample(x, y, i, data); + return b; + } + case DataBuffer.TYPE_FLOAT: + { + float[] b = (float[]) obj; + if (b == null) b = new float[numBands]; + for (int i = 0; i < numBands; i++) + b[i] = getSampleFloat(x, y, i, data); + return b; + } + case DataBuffer.TYPE_DOUBLE: + { + double[] b = (double[]) obj; + if (b == null) + b = new double[numBands]; + for (int i = 0; i < numBands; i++) + b[i] = getSample(x, y, i, data); + return b; + } + + default: + // Seems like the only sensible thing to do. + throw new ClassCastException(); + } + } + + /** + * Returns all the samples for the pixel at location <code>(x, y)</code> + * stored in the specified data buffer. + * + * @param x the x-coordinate. + * @param y the y-coordinate. + * @param iArray an array that will be populated with the sample values and + * returned as the result. The size of this array should be equal to the + * number of bands in the model. If the array is <code>null</code>, a new + * array is created. + * @param data the data buffer (<code>null</code> not permitted). + * + * @return The samples for the specified pixel. + * + * @see #setPixel(int, int, int[], DataBuffer) + */ + public int[] getPixel(int x, int y, int[] iArray, DataBuffer data) + { + if (iArray == null) + iArray = new int[numBands]; + for (int i = 0; i < numBands; i++) + iArray[i] = getSample(x, y, i, data); + + return iArray; + } + + /** + * Copy pixels from a region into an array. + * + * Copies the samples of the pixels in the rectangle starting at x, y that + * is w pixels wide and h scanlines high. When there is more than one band, + * the samples stored in order before the next pixel. This ordering isn't + * well specified in Sun's docs as of 1.4.2. + * + * If iArray is null, a new array is allocated, filled, and returned. + * + * @param x The x-coordinate of the pixel rectangle to store in + * <code>iArray</code>. + * @param y The y-coordinate of the pixel rectangle to store in + * <code>iArray</code>. + * @param w The width in pixels of the rectangle. + * @param h The height in pixels of the rectangle. + * @param iArray The int 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. + */ + public int[] getPixels(int x, int y, int w, int h, int[] iArray, + DataBuffer data) + { + if (x < 0 || y < 0) + throw new ArrayIndexOutOfBoundsException( + "x and y must not be less than 0."); + if (iArray == null) + iArray = new int[w * h * numBands]; + int outOffset = 0; + int maxX = x + w; + int maxY = y + h; + for (int yy = x; yy < maxY; yy++) + { + for (int xx = x; xx < maxX; xx++) + { + for (int b = 0; b < numBands; b++) + { + int offset = bandOffsets[b] + yy * scanlineStride + xx; + iArray[outOffset++] = + data.getElem(bankIndices[b], offset); + } + } + } + return iArray; + } + + /** + * Returns a sample value for the pixel at (x, y) in the specified data + * buffer. + * + * @param x the x-coordinate of the pixel. + * @param y the y-coordinate of the pixel. + * @param b the band (in the range <code>0</code> to + * <code>getNumBands() - 1</code>). + * @param data the data buffer (<code>null</code> not permitted). + * + * @return The sample value. + * + * @throws NullPointerException if <code>data</code> is <code>null</code>. + */ + public int getSample(int x, int y, int b, DataBuffer data) + { + int offset = bandOffsets[b] + y * scanlineStride + x; + return data.getElem(bankIndices[b], offset); + } + + /** + * Returns a sample value for the pixel at (x, y) in the specified data + * buffer. + * + * @param x the x-coordinate of the pixel. + * @param y the y-coordinate of the pixel. + * @param b the band (in the range <code>0</code> to + * <code>getNumBands() - 1</code>). + * @param data the data buffer (<code>null</code> not permitted). + * + * @return The sample value. + * + * @throws NullPointerException if <code>data</code> is <code>null</code>. + * + * @see #getSample(int, int, int, DataBuffer) + */ + public float getSampleFloat(int x, int y, int b, DataBuffer data) + { + int offset = bandOffsets[b] + y * scanlineStride + x; + return data.getElemFloat(bankIndices[b], offset); + } + + /** + * Returns the sample value for the pixel at (x, y) in the specified data + * buffer. + * + * @param x the x-coordinate of the pixel. + * @param y the y-coordinate of the pixel. + * @param b the band (in the range <code>0</code> to + * <code>getNumBands() - 1</code>). + * @param data the data buffer (<code>null</code> not permitted). + * + * @return The sample value. + * + * @throws NullPointerException if <code>data</code> is <code>null</code>. + * + * @see #getSample(int, int, int, DataBuffer) + */ + public double getSampleDouble(int x, int y, int b, DataBuffer data) + { + int offset = bandOffsets[b] + y * scanlineStride + x; + return data.getElemDouble(bankIndices[b], offset); + } + + /** + * Copy one band's samples from a region into an array. + * + * Copies from one band the samples of the pixels in the rectangle starting + * at x, y that is w pixels wide and h scanlines high. + * + * If iArray is null, a new array is allocated, filled, and returned. + * + * @param x The x-coordinate of the pixel rectangle to store in + * <code>iArray</code>. + * @param y The y-coordinate of the pixel rectangle to store in + * <code>iArray</code>. + * @param w The width in pixels of the rectangle. + * @param h The height in pixels of the rectangle. + * @param b The band to retrieve. + * @param iArray The int 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. + */ + public int[] getSamples(int x, int y, int w, int h, int b, int[] iArray, + DataBuffer data) + { + if (x < 0 || y < 0) + throw new ArrayIndexOutOfBoundsException( + "x and y must not be less than 0."); + if (iArray == null) + iArray = new int[w * h]; + int outOffset = 0; + int maxX = x + w; + int maxY = y + h; + for (int yy = y; yy < maxY; yy++) + { + for (int xx = x; xx < maxX; xx++) + { + int offset = bandOffsets[b] + yy * scanlineStride + xx; + iArray[outOffset++] = + data.getElem(bankIndices[b], offset); + } + } + return iArray; + } + + /** + * 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 = y * scanlineStride + x; + + try + { + switch (transferType) + { + case DataBuffer.TYPE_BYTE: + { + DataBufferByte out = (DataBufferByte) data; + byte[] in = (byte[]) obj; + for (int i = 0; i < numBands; i++) + out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i]; + return; + } + case DataBuffer.TYPE_SHORT: + { + DataBufferShort out = (DataBufferShort) data; + short[] in = (short[]) obj; + for (int i = 0; i < numBands; i++) + out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i]; + return; + } + case DataBuffer.TYPE_USHORT: + { + DataBufferUShort out = (DataBufferUShort) data; + short[] in = (short[]) obj; + for (int i = 0; i < numBands; i++) + out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i]; + return; + } + case DataBuffer.TYPE_INT: + { + DataBufferInt out = (DataBufferInt) data; + int[] in = (int[]) obj; + for (int i = 0; i < numBands; i++) + out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i]; + return; + } + case DataBuffer.TYPE_FLOAT: + { + DataBufferFloat out = (DataBufferFloat) data; + float[] in = (float[]) obj; + for (int i = 0; i < numBands; i++) + out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i]; + return; + } + case DataBuffer.TYPE_DOUBLE: + { + DataBufferDouble out = (DataBufferDouble) data; + double[] in = (double[]) obj; + for (int i = 0; i < numBands; i++) + out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i]; + 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); + } + } + + /** + * Sets the samples for the pixel at (x, y) in the specified data buffer to + * the specified values. + * + * @param x the x-coordinate of the pixel. + * @param y the y-coordinate of the pixel. + * @param iArray the sample values (<code>null</code> not permitted). + * @param data the data buffer (<code>null</code> not permitted). + * + * @throws NullPointerException if either <code>iArray</code> or + * <code>data</code> is <code>null</code>. + */ + public void setPixel(int x, int y, int[] iArray, DataBuffer data) + { + for (int b = 0; b < numBands; b++) + data.setElem(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, + iArray[b]); + } + + /** + * Sets the sample values for the pixels in the region specified by + * (x, y, w, h) in the specified data buffer. The array is + * ordered by pixels (that is, all the samples for the first pixel are + * grouped together, followed by all the samples for the second pixel, and so + * on). + * + * @param x the x-coordinate of the top-left pixel. + * @param y the y-coordinate of the top-left pixel. + * @param w the width of the region of pixels. + * @param h the height of the region of pixels. + * @param iArray the pixel sample values (<code>null</code> not permitted). + * @param data the data buffer (<code>null</code> not permitted). + * + * @throws NullPointerException if either <code>iArray</code> or + * <code>data</code> is <code>null</code>. + */ + public void setPixels(int x, int y, int w, int h, int[] iArray, + DataBuffer data) + { + int inOffset = 0; + for (int hh = 0; hh < h; hh++) + { + for (int ww = 0; ww < w; ww++) + { + int offset = y * scanlineStride + (x + ww); + for (int b = 0; b < numBands; b++) + data.setElem(bankIndices[b], bandOffsets[b] + offset, + iArray[inOffset++]); + } + y++; + } + } + + /** + * Sets the sample value for band <code>b</code> of the pixel at location + * <code>(x, y)</code> in the specified data buffer. + * + * @param x the x-coordinate. + * @param y the y-coordinate. + * @param b the band index. + * @param s the sample value. + * @param data the data buffer (<code>null</code> not permitted). + * + * @see #getSample(int, int, int, DataBuffer) + */ + public void setSample(int x, int y, int b, int s, DataBuffer data) + { + data.setElem(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s); + } + + /** + * Sets the sample value for a band for the pixel at (x, y) in the + * specified data buffer. + * + * @param x the x-coordinate of the pixel. + * @param y the y-coordinate of the pixel. + * @param b the band (in the range <code>0</code> to + * <code>getNumBands() - 1</code>). + * @param s the sample value. + * @param data the data buffer (<code>null</code> not permitted). + * + * @throws NullPointerException if <code>data</code> is <code>null</code>. + */ + public void setSample(int x, int y, int b, float s, DataBuffer data) + { + data.setElemFloat(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, + s); + } + + /** + * Sets the sample value for a band for the pixel at (x, y) in the + * specified data buffer. + * + * @param x the x-coordinate of the pixel. + * @param y the y-coordinate of the pixel. + * @param b the band (in the range <code>0</code> to + * <code>getNumBands() - 1</code>). + * @param s the sample value. + * @param data the data buffer (<code>null</code> not permitted). + * + * @throws NullPointerException if <code>data</code> is <code>null</code>. + */ + public void setSample(int x, int y, int b, double s, DataBuffer data) + { + data.setElemDouble(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, + s); + } + + /** + * Sets the sample values for one band for the pixels in the region + * specified by (x, y, w, h) in the specified data buffer. + * + * @param x the x-coordinate of the top-left pixel. + * @param y the y-coordinate of the top-left pixel. + * @param w the width of the region of pixels. + * @param h the height of the region of pixels. + * @param b the band (in the range <code>0</code> to + * </code>getNumBands() - 1</code>). + * @param iArray the sample values (<code>null</code> not permitted). + * @param data the data buffer (<code>null</code> not permitted). + * + * @throws NullPointerException if either <code>iArray</code> or + * <code>data</code> is <code>null</code>. + */ + public void setSamples(int x, int y, int w, int h, int b, int[] iArray, + DataBuffer data) + { + if (x < 0 || y < 0) + throw new ArrayIndexOutOfBoundsException( + "x and y must not be less than 0."); + int inOffset = 0; + + switch (getTransferType()) + { + case DataBuffer.TYPE_BYTE: + { + DataBufferByte out = (DataBufferByte) data; + byte[] bank = out.getData(bankIndices[b]); + for (int hh = 0; hh < h; hh++) + { + for (int ww = 0; ww < w; ww++) + { + int offset = bandOffsets[b] + y * scanlineStride + (x + ww); + bank[offset] = (byte)iArray[inOffset++]; + } + y++; + } + return; + } + case DataBuffer.TYPE_SHORT: + { + DataBufferShort out = (DataBufferShort) data; + short[] bank = out.getData(bankIndices[b]); + for (int hh = 0; hh < h; hh++) + { + for (int ww = 0; ww < w; ww++) + { + int offset = bandOffsets[b] + y * scanlineStride + (x + ww); + bank[offset] = (short)iArray[inOffset++]; + } + y++; + } + return; + } + case DataBuffer.TYPE_USHORT: + { + DataBufferShort out = (DataBufferShort) data; + short[] bank = out.getData(bankIndices[b]); + for (int hh = 0; hh < h; hh++) + { + for (int ww = 0; ww < w; ww++) + { + int offset = bandOffsets[b] + y * scanlineStride + (x + ww); + bank[offset] = (short)iArray[inOffset++]; + } + y++; + } + return; + } + case DataBuffer.TYPE_INT: + { + DataBufferInt out = (DataBufferInt) data; + int[] bank = out.getData(bankIndices[b]); + for (int hh = 0; hh < h; hh++) + { + for (int ww = 0; ww < w; ww++) + { + int offset = bandOffsets[b] + y * scanlineStride + (x + ww); + bank[offset] = iArray[inOffset++]; + } + y++; + } + return; + } + case DataBuffer.TYPE_FLOAT: + case DataBuffer.TYPE_DOUBLE: + break; + default: + throw new ClassCastException("Unsupported data type"); + } + + // Default implementation probably slower for float and double + for (int hh = 0; hh < h; hh++) + { + for (int ww = 0; ww < w; ww++) + { + int offset = bandOffsets[b] + y * scanlineStride + (x + ww); + data.setElem(bankIndices[b], offset, iArray[inOffset++]); + } + y++; + } + } + + /** + * Creates a String with some information about this SampleModel. + * @return A String describing this SampleModel. + * @see java.lang.Object#toString() + */ + public String toString() + { + CPStringBuilder result = new CPStringBuilder(); + 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(); + } +} |