/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @author Igor V. Stolyarov
* @version $Revision$
*/
package java.awt.image;
import java.util.Arrays;
import org.apache.harmony.awt.internal.nls.Messages;
/**
* The ComponentSampleModel class represents a set of image data whose each
* element - the sample of a pixel - takes one data element of the DataBuffer.
* <p>
* The Bank indices denote the correspondence between the bank of data buffers
* and a band of image data. The Pixel stride is the number of data array
* elements between two samples for the same band on the same scanline. The
* pixel stride for a BandedSampleModel is one. The scanline stride represents
* the number of data array elements between a specified sample and the
* corresponding sample in the same column in the next scanline. The array of
* band offsets gives the starting offsets within each data banks of the in the
* DataBuffer. The bank indices represents the indices within each bank of the
* DataBuffer corresponding to a band of image data.
*
* @since Android 1.0
*/
public class ComponentSampleModel extends SampleModel {
/**
* The band offsets array of this ComponentSampleModel.
*/
protected int bandOffsets[];
/**
* The bank indices array of this ComponentSampleModel.
*/
protected int bankIndices[];
/**
* The number of bands in this ComponentSampleModel.
*/
protected int numBands;
/**
* The number banks of this ComponentSampleModel.
*/
protected int numBanks;
/**
* The scanline stride of this ComponentSampleModel.
*/
protected int scanlineStride;
/**
* The pixel stride of this ComponentSampleModel.
*/
protected int pixelStride;
/**
* Instantiates a new ComponentSampleModel with the specified properties.
*
* @param dataType
* the data type of samples.
* @param w
* the width of the image data.
* @param h
* the height of the image data.
* @param pixelStride
* the pixel stride of the image data.
* @param scanlineStride
* the scanline stride of the image data.
* @param bankIndices
* the array of the bank indices.
* @param bandOffsets
* the array of the band offsets.
*/
public ComponentSampleModel(int dataType, int w, int h, int pixelStride, int scanlineStride,
int bankIndices[], int bandOffsets[]) {
super(dataType, w, h, bandOffsets.length);
if (pixelStride < 0) {
// awt.24B=Pixel stride must be >= 0
throw new IllegalArgumentException(Messages.getString("awt.24B")); //$NON-NLS-1$
}
if (scanlineStride < 0) {
// awt.24C=Scanline stride must be >= 0
throw new IllegalArgumentException(Messages.getString("awt.24C")); //$NON-NLS-1$
}
if (bankIndices.length != bandOffsets.length) {
// awt.24D=Bank Indices length must be equal Bank Offsets length
throw new IllegalArgumentException(Messages.getString("awt.24D")); //$NON-NLS-1$
}
this.pixelStride = pixelStride;
this.scanlineStride = scanlineStride;
this.bandOffsets = bandOffsets.clone();
this.bankIndices = bankIndices.clone();
this.numBands = bandOffsets.length;
int maxBank = 0;
for (int i = 0; i < bankIndices.length; i++) {
if (bankIndices[i] < 0) {
// awt.24E=Index of {0} bank must be >= 0
throw new IllegalArgumentException(Messages.getString("awt.24E", i)); //$NON-NLS-1$
}
if (bankIndices[i] > maxBank) {
maxBank = bankIndices[i];
}
}
this.numBanks = maxBank + 1;
}
/**
* Instantiates a new ComponentSampleModel with the specified properties.
*
* @param dataType
* the data type of the samples.
* @param w
* the width of the image data.
* @param h
* the height of the image data.
* @param pixelStride
* the pixel stride of the image data.
* @param scanlineStride
* the scanline stride of the image data.
* @param bandOffsets
* the band offsets.
*/
public ComponentSampleModel(int dataType, int w, int h, int pixelStride, int scanlineStride,
int bandOffsets[]) {
super(dataType, w, h, bandOffsets.length);
if (pixelStride < 0) {
// awt.24B=Pixel stride must be >= 0
throw new IllegalArgumentException(Messages.getString("awt.24B")); //$NON-NLS-1$
}
if (scanlineStride < 0) {
// awt.24C=Scanline stride must be >= 0
throw new IllegalArgumentException(Messages.getString("awt.24C")); //$NON-NLS-1$
}
this.pixelStride = pixelStride;
this.scanlineStride = scanlineStride;
this.bandOffsets = bandOffsets.clone();
this.numBands = bandOffsets.length;
this.numBanks = 1;
this.bankIndices = new int[numBands];
for (int i = 0; i < numBands; i++) {
bankIndices[i] = 0;
}
}
@Override
public Object getDataElements(int x, int y, Object obj, DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
switch (dataType) {
case DataBuffer.TYPE_BYTE:
byte bdata[];
if (obj == null) {
bdata = new byte[numBands];
} else {
bdata = (byte[])obj;
}
for (int i = 0; i < numBands; i++) {
bdata[i] = (byte)getSample(x, y, i, data);
}
obj = bdata;
break;
case DataBuffer.TYPE_SHORT:
case DataBuffer.TYPE_USHORT:
short sdata[];
if (obj == null) {
sdata = new short[numBands];
} else {
sdata = (short[])obj;
}
for (int i = 0; i < numBands; i++) {
sdata[i] = (short)getSample(x, y, i, data);
}
obj = sdata;
break;
case DataBuffer.TYPE_INT:
int idata[];
if (obj == null) {
idata = new int[numBands];
} else {
idata = (int[])obj;
}
for (int i = 0; i < numBands; i++) {
idata[i] = getSample(x, y, i, data);
}
obj = idata;
break;
case DataBuffer.TYPE_FLOAT:
float fdata[];
if (obj == null) {
fdata = new float[numBands];
} else {
fdata = (float[])obj;
}
for (int i = 0; i < numBands; i++) {
fdata[i] = getSampleFloat(x, y, i, data);
}
obj = fdata;
break;
case DataBuffer.TYPE_DOUBLE:
double ddata[];
if (obj == null) {
ddata = new double[numBands];
} else {
ddata = (double[])obj;
}
for (int i = 0; i < numBands; i++) {
ddata[i] = getSampleDouble(x, y, i, data);
}
obj = ddata;
break;
}
return obj;
}
@Override
public void setDataElements(int x, int y, Object obj, DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
switch (dataType) {
case DataBuffer.TYPE_BYTE:
byte barr[] = (byte[])obj;
for (int i = 0; i < numBands; i++) {
setSample(x, y, i, barr[i] & 0xff, data);
}
break;
case DataBuffer.TYPE_SHORT:
case DataBuffer.TYPE_USHORT:
short sarr[] = (short[])obj;
for (int i = 0; i < numBands; i++) {
setSample(x, y, i, sarr[i] & 0xffff, data);
}
break;
case DataBuffer.TYPE_INT:
int iarr[] = (int[])obj;
for (int i = 0; i < numBands; i++) {
setSample(x, y, i, iarr[i], data);
}
break;
case DataBuffer.TYPE_FLOAT:
float farr[] = (float[])obj;
for (int i = 0; i < numBands; i++) {
setSample(x, y, i, farr[i], data);
}
break;
case DataBuffer.TYPE_DOUBLE:
double darr[] = (double[])obj;
for (int i = 0; i < numBands; i++) {
setSample(x, y, i, darr[i], data);
}
break;
}
}
/**
* Compares this ComponentSampleModel with the specified Object.
*
* @param o
* the Object.
* @return true, if the object is a ComponentSampleModel with identical data
* values to this ComponentSampleModel, false otherwise.
*/
@Override
public boolean equals(Object o) {
if ((o == null) || !(o instanceof ComponentSampleModel)) {
return false;
}
ComponentSampleModel model = (ComponentSampleModel)o;
return this.width == model.width && this.height == model.height
&& this.numBands == model.numBands && this.dataType == model.dataType
&& Arrays.equals(this.bandOffsets, model.bandOffsets)
&& Arrays.equals(this.bankIndices, model.bankIndices)
&& this.numBands == model.numBands && this.numBanks == model.numBanks
&& this.scanlineStride == model.scanlineStride
&& this.pixelStride == model.pixelStride;
}
/**
* @see java.awt.image.SampleModel#createSubsetSampleModel(int[])
*/
@Override
public SampleModel createSubsetSampleModel(int bands[]) {
if (bands.length > this.numBands) {
// awt.64=The number of the bands in the subset is greater than the
// number of bands in the sample model
throw new RasterFormatException(Messages.getString("awt.64")); //$NON-NLS-1$
}
int indices[] = new int[bands.length];
int offsets[] = new int[bands.length];
for (int i = 0; i < bands.length; i++) {
indices[i] = bankIndices[bands[i]];
offsets[i] = bandOffsets[bands[i]];
}
return new ComponentSampleModel(dataType, width, height, pixelStride, scanlineStride,
indices, offsets);
}
@Override
public SampleModel createCompatibleSampleModel(int w, int h) {
return new ComponentSampleModel(dataType, w, h, pixelStride, pixelStride * w, bankIndices,
bandOffsets);
}
@Override
public int[] getPixel(int x, int y, int iArray[], DataBuffer data) {
int pixel[];
if (iArray == null) {
pixel = new int[numBands];
} else {
pixel = iArray;
}
for (int i = 0; i < numBands; i++) {
pixel[i] = getSample(x, y, i, data);
}
return pixel;
}
@Override
public void setPixel(int x, int y, int iArray[], DataBuffer data) {
for (int i = 0; i < numBands; i++) {
setSample(x, y, i, iArray[i], data);
}
}
@Override
public int getSample(int x, int y, int b, DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
return data.getElem(bankIndices[b], y * scanlineStride + x * pixelStride + bandOffsets[b]);
}
@Override
public float getSampleFloat(int x, int y, int b, DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
return data.getElemFloat(bankIndices[b], y * scanlineStride + x * pixelStride
+ bandOffsets[b]);
}
@Override
public double getSampleDouble(int x, int y, int b, DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
return data.getElemDouble(bankIndices[b], y * scanlineStride + x * pixelStride
+ bandOffsets[b]);
}
@Override
public int[] getPixels(int x, int y, int w, int h, int iArray[], DataBuffer data) {
if (x < 0 || y < 0 || x > this.width || x + w > this.width || y > this.height
|| y + h > this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
int pixels[] = null;
int idx = 0;
if (iArray == null) {
pixels = new int[w * h * numBands];
} else {
pixels = iArray;
}
for (int i = y; i < y + h; i++) {
for (int j = x; j < x + w; j++) {
for (int n = 0; n < numBands; n++) {
pixels[idx++] = getSample(j, i, n, data);
}
}
}
return pixels;
}
@Override
public void setPixels(int x, int y, int w, int h, int iArray[], DataBuffer data) {
if (x < 0 || y < 0 || x + w > this.width || y + h > this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
int idx = 0;
for (int i = y; i < y + h; i++) {
for (int j = x; j < x + w; j++) {
for (int n = 0; n < numBands; n++) {
setSample(j, i, n, iArray[idx++], data);
}
}
}
}
@Override
public void setSample(int x, int y, int b, int s, DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
data.setElem(bankIndices[b], y * scanlineStride + x * pixelStride + bandOffsets[b], s);
}
@Override
public int[] getSamples(int x, int y, int w, int h, int b, int iArray[], DataBuffer data) {
if (x < 0 || y < 0 || x + w > this.width || y + h > this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
int samples[];
int idx = 0;
if (iArray == null) {
samples = new int[w * h];
} else {
samples = iArray;
}
if (data == null) {
// awt.295=data is null
throw new NullPointerException(Messages.getString("awt.295")); //$NON-NLS-1$
}
for (int i = y; i < y + h; i++) {
for (int j = x; j < x + w; j++) {
samples[idx++] = getSample(j, i, b, data);
}
}
return samples;
}
@Override
public void setSamples(int x, int y, int w, int h, int b, int iArray[], DataBuffer data) {
if (x < 0 || y < 0 || x + w > this.width || y + h > this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
int idx = 0;
for (int i = y; i < y + h; i++) {
for (int j = x; j < x + w; j++) {
setSample(j, i, b, iArray[idx++], data);
}
}
}
@Override
public void setSample(int x, int y, int b, float s, DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
data.setElemFloat(bankIndices[b], y * scanlineStride + x * pixelStride + bandOffsets[b], s);
}
@Override
public void setSample(int x, int y, int b, double s, DataBuffer data) {
if (x < 0 || y < 0 || x >= this.width || y >= this.height) {
// awt.63=Coordinates are not in bounds
throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$
}
data
.setElemDouble(bankIndices[b], y * scanlineStride + x * pixelStride
+ bandOffsets[b], s);
}
@Override
public DataBuffer createDataBuffer() {
DataBuffer data = null;
int maxOffset = bandOffsets[0];
for (int i = 1; i < bandOffsets.length; i++) {
if (bandOffsets[i] > maxOffset) {
maxOffset = bandOffsets[i];
}
}
int size = (height - 1) * scanlineStride + (width - 1) * pixelStride + maxOffset + 1;
switch (dataType) {
case DataBuffer.TYPE_BYTE:
data = new DataBufferByte(size, numBanks);
break;
case DataBuffer.TYPE_SHORT:
data = new DataBufferShort(size, numBanks);
break;
case DataBuffer.TYPE_USHORT:
data = new DataBufferUShort(size, numBanks);
break;
case DataBuffer.TYPE_INT:
data = new DataBufferInt(size, numBanks);
break;
case DataBuffer.TYPE_FLOAT:
data = new DataBufferFloat(size, numBanks);
break;
case DataBuffer.TYPE_DOUBLE:
data = new DataBufferDouble(size, numBanks);
break;
}
return data;
}
/**
* Gets the offset of the specified band of the specified pixel.
*
* @param x
* the X coordinate of the pixel.
* @param y
* the Y coordinate of the pixel.
* @param b
* the band.
* @return the offset of the specified band of the specified pixel.
*/
public int getOffset(int x, int y, int b) {
return y * scanlineStride + x * pixelStride + bandOffsets[b];
}
/**
* Gets the offset of the first band of the specified pixel.
*
* @param x
* the X coordinate of pixel.
* @param y
* the Y coordinate of pixel.
* @return the offset of the first band of the specified pixel.
*/
public int getOffset(int x, int y) {
return y * scanlineStride + x * pixelStride + bandOffsets[0];
}
@Override
public final int getSampleSize(int band) {
return DataBuffer.getDataTypeSize(dataType);
}
@Override
public final int[] getSampleSize() {
int sampleSizes[] = new int[numBands];
int size = DataBuffer.getDataTypeSize(dataType);
for (int i = 0; i < numBands; i++) {
sampleSizes[i] = size;
}
return sampleSizes;
}
/**
* Gets an array of bank indices corresponding to this ComponentSampleModel.
*
* @return the array of bank indices.
*/
public final int[] getBankIndices() {
return bankIndices.clone();
}
/**
* Gets an array of the band offsets corresponding to this
* ComponentSampleModel.
*
* @return the array of band offsets.
*/
public final int[] getBandOffsets() {
return bandOffsets.clone();
}
/**
* Gets a hash code of this ComponentSampleModel object.
*
* @return a hash code of this ComponentSampleModel object.
*/
@Override
public int hashCode() {
int hash = 0;
int tmp = 0;
hash = width;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
hash ^= height;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
hash ^= numBands;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
hash ^= dataType;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
for (int element : bandOffsets) {
hash ^= element;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
}
for (int element : bankIndices) {
hash ^= element;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
}
hash ^= pixelStride;
tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
hash ^= scanlineStride;
return hash;
}
/**
* Gets the scanline stride of this ComponentSampleModel.
*
* @return the scanline stride of this ComponentSampleModel.
*/
public final int getScanlineStride() {
return scanlineStride;
}
/**
* Gets the pixel stride.
*
* @return the pixel stride.
*/
public final int getPixelStride() {
return pixelStride;
}
@Override
public final int getNumDataElements() {
return numBands;
}
}